Add a dummy header to preserve the presence of an include directory, in order to not break downstream third-party installation logic; revert changes to CMakeLists.txt

Move Boost.StaticAssert to Boost.Config

.github/workflows/ci.yml

@@ -1,4 +1,4 @@
-name: GitHub Actions CI
+name: CI
 
 on:
   pull_request:
@@ -6,147 +6,663 @@ on:
     branches:
       - master
       - develop
-      - githubactions*
       - feature/**
-      - fix/**
+
-      - pr/**
+env:
+  UBSAN_OPTIONS: print_stacktrace=1
 
 jobs:
-  cpp-matrix:
+  posix:
-    runs-on: ubuntu-latest
-    name: Generate Test Matrix
-    outputs:
-      matrix: ${{ steps.cpp-matrix.outputs.matrix }}
-    steps:
-      - name: Generate Test Matrix
-        uses: alandefreitas/cpp-actions/cpp-matrix@master
-        id: cpp-matrix
-        with:
-          extra-values: |
-            boost-lib: static_assert
-            scan-dirs: test
-          compilers: |
-            gcc >= 4.8
-            clang >= 3.5
-            msvc >= 14.0
-            apple-clang *
-            mingw *
-            clang-cl *
-          subrange-policy: |
-            msvc: one-per-minor
-          standards: ">=11"
-          latest-factors: |
-            gcc Asan TSan UBSan
-            clang BoundsSan IntSan
-          factors: |
-            gcc Shared
-            msvc Shared x86
-            mingw Shared
-          trace-commands: true
-  build:
-    needs: cpp-matrix
     strategy:
       fail-fast: false
       matrix:
-        include: ${{ fromJSON(needs.cpp-matrix.outputs.matrix) }}
+        include:
+          - toolset: gcc-4.8
+            cxxstd: "11"
+            container: ubuntu:18.04
+            os: ubuntu-latest
+            install: g++-4.8-multilib
+            address-model: 32,64
+          - toolset: gcc-5
+            cxxstd: "11,14,1z"
+            container: ubuntu:18.04
+            os: ubuntu-latest
+            install: g++-5-multilib
+            address-model: 32,64
+          - toolset: gcc-6
+            cxxstd: "11,14,1z"
+            container: ubuntu:18.04
+            os: ubuntu-latest
+            install: g++-6-multilib
+            address-model: 32,64
+          - toolset: gcc-7
+            cxxstd: "11,14,17"
+            container: ubuntu:18.04
+            os: ubuntu-latest
+            install: g++-7-multilib
+            address-model: 32,64
+          - toolset: gcc-8
+            cxxstd: "11,14,17,2a"
+            container: ubuntu:20.04
+            os: ubuntu-latest
+            install: g++-8-multilib
+            address-model: 32,64
+          - toolset: gcc-9
+            cxxstd: "11,14,17,2a"
+            container: ubuntu:20.04
+            os: ubuntu-latest
+            install: g++-9-multilib
+            address-model: 32,64
+          - toolset: gcc-10
+            cxxstd: "11,14,17,2a"
+            container: ubuntu:20.04
+            os: ubuntu-latest
+            install: g++-10-multilib
+            address-model: 32,64
+          - toolset: gcc-11
+            cxxstd: "11,14,17,20"
+            os: ubuntu-22.04
+            install: g++-11-multilib
+            address-model: 32,64
+          - toolset: gcc-12
+            cxxstd: "11,14,17,20,2b"
+            os: ubuntu-22.04
+            install: g++-12-multilib
+            address-model: 32,64
+          - toolset: gcc-13
+            cxxstd: "11,14,17,20,2b"
+            os: ubuntu-latest
+            container: ubuntu:24.04
+            install: g++-13-multilib
+            address-model: 32,64
+          - toolset: gcc-14
+            cxxstd: "11,14,17,20,23,2c"
+            os: ubuntu-latest
+            container: ubuntu:24.04
+            install: g++-14-multilib
+            address-model: 32,64
+          - toolset: gcc-15
+            cxxstd: "11,14,17,20,23,2c"
+            os: ubuntu-latest
+            container: ubuntu:25.04
+            install: g++-15-multilib
+            address-model: 32,64
+          - toolset: clang
+            compiler: clang++-3.9
+            cxxstd: "11,14"
+            container: ubuntu:18.04
+            os: ubuntu-latest
+            install: clang-3.9
+          - toolset: clang
+            compiler: clang++-4.0
+            cxxstd: "11,14"
+            container: ubuntu:18.04
+            os: ubuntu-latest
+            install: clang-4.0
+          - toolset: clang
+            compiler: clang++-5.0
+            cxxstd: "11,14,1z"
+            container: ubuntu:18.04
+            os: ubuntu-latest
+            install: clang-5.0
+          - toolset: clang
+            compiler: clang++-6.0
+            cxxstd: "11,14,17"
+            container: ubuntu:20.04
+            os: ubuntu-latest
+            install: clang-6.0
+          - toolset: clang
+            compiler: clang++-7
+            cxxstd: "11,14,17"
+            container: ubuntu:20.04
+            os: ubuntu-latest
+            install: clang-7
+          - toolset: clang
+            compiler: clang++-8
+            cxxstd: "11,14,17"
+            container: ubuntu:20.04
+            os: ubuntu-latest
+            install: clang-8
+          - toolset: clang
+            compiler: clang++-9
+            cxxstd: "11,14,17,2a"
+            container: ubuntu:20.04
+            os: ubuntu-latest
+            install: clang-9
+          - toolset: clang
+            compiler: clang++-10
+            cxxstd: "11,14,17,2a"
+            container: ubuntu:20.04
+            os: ubuntu-latest
+            install: clang-10
+          - toolset: clang
+            compiler: clang++-11
+            cxxstd: "11,14,17,2a"
+            container: ubuntu:20.04
+            os: ubuntu-latest
+            install: clang-11
+          - toolset: clang
+            compiler: clang++-12
+            cxxstd: "11,14,17,20"
+            container: ubuntu:20.04
+            os: ubuntu-latest
+            install: clang-12
+          - toolset: clang
+            compiler: clang++-13
+            cxxstd: "11,14,17,20,2b"
+            container: ubuntu:22.04
+            os: ubuntu-latest
+            install: clang-13
+          - toolset: clang
+            compiler: clang++-14
+            cxxstd: "11,14,17,20,2b"
+            container: ubuntu:22.04
+            os: ubuntu-latest
+            install: clang-14
+          - toolset: clang
+            compiler: clang++-15
+            cxxstd: "11,14,17,20,2b"
+            container: ubuntu:22.04
+            os: ubuntu-latest
+            install: clang-15
+          - toolset: clang
+            compiler: clang++-16
+            cxxstd: "11,14,17,20,2b"
+            container: ubuntu:24.04
+            os: ubuntu-latest
+            install: clang-16
+          - toolset: clang
+            compiler: clang++-17
+            cxxstd: "11,14,17,20,2b"
+            container: ubuntu:24.04
+            os: ubuntu-latest
+            install: clang-17
+          - toolset: clang
+            compiler: clang++-18
+            cxxstd: "11,14,17,20,2b"
+            container: ubuntu:24.04
+            os: ubuntu-latest
+            install: clang-18
+          - toolset: clang
+            compiler: clang++-19
+            cxxstd: "11,14,17,20,23,2c"
+            container: ubuntu:24.04
+            os: ubuntu-latest
+            install: clang-19
+          - toolset: clang
+            compiler: clang++-20
+            cxxstd: "11,14,17,20,23,2c"
+            container: ubuntu:24.04
+            os: ubuntu-latest
+            install: clang-20
+          - toolset: clang
+            compiler: clang++-21
+            cxxstd: "11,14,17,20,23,2c"
+            container: ubuntu:25.10
+            os: ubuntu-latest
+            install: clang-21
+          - toolset: clang
+            os: macos-14
+            cxxstd: "11,14,17,20,2b"
+          - toolset: clang
+            os: macos-15
+            cxxstd: "11,14,17,20,23,2c"
+          - toolset: clang
+            os: macos-26
+            cxxstd: "11,14,17,20,23,2c"
 
-    # use matrix entries
+    runs-on: ${{matrix.os}}
-    name: ${{ matrix.name }}
+
-    runs-on: ${{ matrix.runs-on }}
+    container:
-    container: ${{ matrix.container }}
+      image: ${{matrix.container}}
+      volumes:
+        - /node20217:/node20217:rw,rshared
+        - ${{ startsWith(matrix.container, 'ubuntu:1') && '/node20217:/__e/node20:ro,rshared' || ' ' }}
+
+    defaults:
+      run:
+        shell: bash
 
     steps:
-      # GitHub Actions no longer support older containers.
+      - name: Setup container environment
-      # The workaround is to install our own Node.js for the actions.
+        if: matrix.container
-      - name: Patch Node
-        # The containers that need Node.js 20 will have volumes set up so that
-        # the Node.js 20 installation can go there.
-        if: ${{ matrix.container.volumes }}
         run: |
-          set -x
           apt-get update
-          apt-get install -y curl xz-utils
+          apt-get -y install sudo python3 git g++ curl xz-utils
+
+      - name: Install nodejs20glibc2.17
+        if: ${{ startsWith( matrix.container, 'ubuntu:1' ) }}
+        run: |
           curl -LO https://archives.boost.io/misc/node/node-v20.9.0-linux-x64-glibc-217.tar.xz
           tar -xf node-v20.9.0-linux-x64-glibc-217.tar.xz --strip-components 1 -C /node20217
           ldd /__e/node20/bin/node
 
-      - name: Setup C++ Compiler
+      - uses: actions/checkout@v4
-        uses: alandefreitas/cpp-actions/setup-cpp@master
-        id: setup-cpp
-        with:
-          compiler: ${{ matrix.compiler }}
-          version: ${{ matrix.version }}
 
-      - name: Install Packages
+      - name: Install packages
-        if: matrix.install != ''
+        if: matrix.install
-        uses: alandefreitas/cpp-actions/package-install@master
+        run: |
-        id: package-install
+          sudo apt-get update
-        with:
+          sudo apt-get -y install ${{matrix.install}}
-          apt-get: ${{ matrix.install }}
+
-
+      - name: Setup Boost
-      - name: Clone Library
+        run: |
-        uses: actions/checkout@v4
+          echo GITHUB_REPOSITORY: $GITHUB_REPOSITORY
-
+          LIBRARY=${GITHUB_REPOSITORY#*/}
-      - name: Clone Boost
+          echo LIBRARY: $LIBRARY
-        uses: alandefreitas/cpp-actions/boost-clone@master
+          echo "LIBRARY=$LIBRARY" >> $GITHUB_ENV
-        id: boost-clone
+          echo GITHUB_BASE_REF: $GITHUB_BASE_REF
-        with:
+          echo GITHUB_REF: $GITHUB_REF
-          branch: ${{ (github.ref_name == 'master' && github.ref_name) || 'develop' }}
+          REF=${GITHUB_BASE_REF:-$GITHUB_REF}
-          boost-dir: ../boost-root
+          REF=${REF#refs/heads/}
-          scan-modules-dir: .
+          echo REF: $REF
-          scan-modules-ignore: ${{ matrix.boost-lib }}
+          BOOST_BRANCH=develop && [ "$REF" == "master" ] && BOOST_BRANCH=master || true
-          modules-scan-paths: ${{ matrix.scan-dirs }}
+          echo BOOST_BRANCH: $BOOST_BRANCH
-          cache: false
+          cd ..
-
+          git clone -b $BOOST_BRANCH --depth 1 https://github.com/boostorg/boost.git boost-root
-      - name: Copy Library
+          cd boost-root
-        shell: bash
+          cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
+          git submodule update --init tools/boostdep
+          python3 tools/boostdep/depinst/depinst.py --git_args "--jobs 3" $LIBRARY
+          ./bootstrap.sh
+          ./b2 -d0 headers
+
+      - name: Create user-config.jam
+        if: matrix.compiler
+        run: |
+          echo "using ${{matrix.toolset}} : : ${{matrix.compiler}} ;" > ~/user-config.jam
+
+      - name: Run tests
         run: |
-          workspace_root=$(echo "$GITHUB_WORKSPACE" | sed 's/\\/\//g')
           cd ../boost-root
-          rm -rf "libs/${{ matrix.boost-lib }}"
+          ./b2 -j3 libs/$LIBRARY/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} ${ADDRMD:+address-model=$ADDRMD} variant=debug,release
-          mkdir "libs/${{ matrix.boost-lib }}"
-          cp -r "$workspace_root"/* "libs/${{ matrix.boost-lib }}"
 
-      - name: B2 Workflow
+  windows:
-        uses: alandefreitas/cpp-actions/b2-workflow@master
+    strategy:
-        with:
+      fail-fast: false
-          source-dir: ${{ steps.boost-clone.outputs.boost-dir }}
+      matrix:
-          modules: ${{ matrix.boost-lib }}
+        include:
-          toolset: ${{ matrix.b2-toolset }}
+          - toolset: msvc-14.3
-          build-variant: ${{ matrix.build-type }}
+            cxxstd: "14,17,20,latest"
-          cxx: ${{ steps.setup-cpp.outputs.cxx || '' }}
+            addrmd: 32,64
-          cxxstd: ${{ matrix.cxxstd }}
+            os: windows-2022
-          address-model: ${{ matrix.address-model }}
+          - toolset: clang-win
-          asan: ${{ matrix.asan }}
+            cxxstd: "14,17,20,latest"
-          ubsan: ${{ matrix.ubsan }}
+            addrmd: 32,64
-          tsan: ${{ matrix.tsan }}
+            os: windows-2022
-          shared: ${{ matrix.shared }}
+          - toolset: gcc
-          abbreviate-paths: false
+            cxxstd: "11,14,17,2a"
-          hash: true
+            addrmd: 64
-          debug-configuration: true
+            os: windows-2022
-          trace-commands: true
 
-      - name: CMake Workflow
+    runs-on: ${{matrix.os}}
-        uses: alandefreitas/cpp-actions/cmake-workflow@master
+
-        with:
+    steps:
-          source-dir: ${{ steps.boost-clone.outputs.boost-dir }}/libs/${{ matrix.boost-lib }}
+      - uses: actions/checkout@v4
-          build-dir: _build_dir_
+
-          run-tests: ignore
+      - name: Setup Boost
-          install: true
+        shell: cmd
-          cmake-version: ">=3.31"
+        run: |
-          generator: ${{ matrix.generator }}
+          echo GITHUB_REPOSITORY: %GITHUB_REPOSITORY%
-          generator-toolset: ${{ matrix.generator-toolset }}
+          for /f %%i in ("%GITHUB_REPOSITORY%") do set LIBRARY=%%~nxi
-          toolchain: ${{ steps.package-install.outputs.vcpkg-toolchain }}
+          echo LIBRARY: %LIBRARY%
-          build-type: ${{ matrix.build-type }}
+          echo LIBRARY=%LIBRARY%>>%GITHUB_ENV%
-          install-prefix: .local
+          echo GITHUB_BASE_REF: %GITHUB_BASE_REF%
-          cxxstd: ${{ matrix.cxxstd }}
+          echo GITHUB_REF: %GITHUB_REF%
-          cc: ${{ steps.setup-cpp.outputs.cc }}
+          if "%GITHUB_BASE_REF%" == "" set GITHUB_BASE_REF=%GITHUB_REF%
-          ccflags: ${{ matrix.ccflags }}
+          set BOOST_BRANCH=develop
-          cxx: ${{ steps.setup-cpp.outputs.cxx }}
+          for /f %%i in ("%GITHUB_BASE_REF%") do if "%%~nxi" == "master" set BOOST_BRANCH=master
-          cxxflags: ${{ matrix.cxxflags }}
+          echo BOOST_BRANCH: %BOOST_BRANCH%
-          shared: ${{ matrix.shared }}
+          cd ..
-          extra-args:
+          git clone -b %BOOST_BRANCH% --depth 1 https://github.com/boostorg/boost.git boost-root
-            "${{ ( !matrix.no-deps && format('-D BOOST_SRC_DIR=\"{0}\"', steps.boost-clone.outputs.boost-dir)\
+          cd boost-root
-            \ ) || '' }} \n${{ ( matrix.no-deps && '-D CPP_ACTIONS_NO_DEPS=ON' ) || '' }}\n"
+          xcopy /s /e /q %GITHUB_WORKSPACE% libs\%LIBRARY%\
-          export-compile-commands: ${{ matrix.time-trace }}
+          git submodule update --init tools/boostdep
-          trace-commands: true
+          python tools/boostdep/depinst/depinst.py --git_args "--jobs 3" %LIBRARY%
+          cmd /c bootstrap
+          b2 -d0 headers
+
+      - name: Run tests
+        shell: cmd
+        run: |
+          cd ../boost-root
+          b2 -j3 libs/%LIBRARY%/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} address-model=${{matrix.addrmd}} variant=debug,release embed-manifest-via=linker
+
+  posix-cmake-subdir:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-22.04
+          - os: ubuntu-24.04
+          - os: macos-14
+          - os: macos-15
+          - os: macos-26
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install packages
+        if: matrix.install
+        run: sudo apt-get -y install ${{matrix.install}}
+
+      - name: Setup Boost
+        run: |
+          echo GITHUB_REPOSITORY: $GITHUB_REPOSITORY
+          LIBRARY=${GITHUB_REPOSITORY#*/}
+          echo LIBRARY: $LIBRARY
+          echo "LIBRARY=$LIBRARY" >> $GITHUB_ENV
+          echo GITHUB_BASE_REF: $GITHUB_BASE_REF
+          echo GITHUB_REF: $GITHUB_REF
+          REF=${GITHUB_BASE_REF:-$GITHUB_REF}
+          REF=${REF#refs/heads/}
+          echo REF: $REF
+          BOOST_BRANCH=develop && [ "$REF" == "master" ] && BOOST_BRANCH=master || true
+          echo BOOST_BRANCH: $BOOST_BRANCH
+          cd ..
+          git clone -b $BOOST_BRANCH --depth 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py --git_args "--jobs 3" $LIBRARY
+
+      - name: Use library with add_subdirectory
+        run: |
+          cd ../boost-root/libs/$LIBRARY/test/cmake_subdir_test
+          mkdir __build__ && cd __build__
+          cmake ..
+          cmake --build .
+          ctest --output-on-failure --no-tests=error
+
+  posix-cmake-install:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-22.04
+          - os: ubuntu-24.04
+          - os: macos-14
+          - os: macos-15
+          - os: macos-26
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install packages
+        if: matrix.install
+        run: sudo apt-get -y install ${{matrix.install}}
+
+      - name: Setup Boost
+        run: |
+          echo GITHUB_REPOSITORY: $GITHUB_REPOSITORY
+          LIBRARY=${GITHUB_REPOSITORY#*/}
+          echo LIBRARY: $LIBRARY
+          echo "LIBRARY=$LIBRARY" >> $GITHUB_ENV
+          echo GITHUB_BASE_REF: $GITHUB_BASE_REF
+          echo GITHUB_REF: $GITHUB_REF
+          REF=${GITHUB_BASE_REF:-$GITHUB_REF}
+          REF=${REF#refs/heads/}
+          echo REF: $REF
+          BOOST_BRANCH=develop && [ "$REF" == "master" ] && BOOST_BRANCH=master || true
+          echo BOOST_BRANCH: $BOOST_BRANCH
+          cd ..
+          git clone -b $BOOST_BRANCH --depth 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py --git_args "--jobs 3" $LIBRARY
+
+      - name: Configure
+        run: |
+          cd ../boost-root
+          mkdir __build__ && cd __build__
+          cmake -DBOOST_INCLUDE_LIBRARIES=$LIBRARY -DCMAKE_INSTALL_PREFIX=~/.local ..
+
+      - name: Install
+        run: |
+          cd ../boost-root/__build__
+          cmake --build . --target install
+
+      - name: Use the installed library
+        run: |
+          cd ../boost-root/libs/$LIBRARY/test/cmake_install_test && mkdir __build__ && cd __build__
+          cmake -DCMAKE_INSTALL_PREFIX=~/.local ..
+          cmake --build .
+          ctest --output-on-failure --no-tests=error
+
+  posix-cmake-test:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-22.04
+          - os: ubuntu-24.04
+          - os: macos-14
+          - os: macos-15
+          - os: macos-26
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install packages
+        if: matrix.install
+        run: sudo apt-get -y install ${{matrix.install}}
+
+      - name: Setup Boost
+        run: |
+          echo GITHUB_REPOSITORY: $GITHUB_REPOSITORY
+          LIBRARY=${GITHUB_REPOSITORY#*/}
+          echo LIBRARY: $LIBRARY
+          echo "LIBRARY=$LIBRARY" >> $GITHUB_ENV
+          echo GITHUB_BASE_REF: $GITHUB_BASE_REF
+          echo GITHUB_REF: $GITHUB_REF
+          REF=${GITHUB_BASE_REF:-$GITHUB_REF}
+          REF=${REF#refs/heads/}
+          echo REF: $REF
+          BOOST_BRANCH=develop && [ "$REF" == "master" ] && BOOST_BRANCH=master || true
+          echo BOOST_BRANCH: $BOOST_BRANCH
+          cd ..
+          git clone -b $BOOST_BRANCH --depth 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py --git_args "--jobs 3" $LIBRARY
+
+      - name: Configure
+        run: |
+          cd ../boost-root
+          mkdir __build__ && cd __build__
+          cmake -DBOOST_INCLUDE_LIBRARIES=$LIBRARY -DBUILD_TESTING=ON ..
+
+      - name: Build tests
+        run: |
+          cd ../boost-root/__build__
+          cmake --build . --target tests
+
+      - name: Run tests
+        run: |
+          cd ../boost-root/__build__
+          ctest --output-on-failure --no-tests=error
+
+  windows-cmake-subdir:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: windows-latest
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Boost
+        shell: cmd
+        run: |
+          echo GITHUB_REPOSITORY: %GITHUB_REPOSITORY%
+          for /f %%i in ("%GITHUB_REPOSITORY%") do set LIBRARY=%%~nxi
+          echo LIBRARY: %LIBRARY%
+          echo LIBRARY=%LIBRARY%>>%GITHUB_ENV%
+          echo GITHUB_BASE_REF: %GITHUB_BASE_REF%
+          echo GITHUB_REF: %GITHUB_REF%
+          if "%GITHUB_BASE_REF%" == "" set GITHUB_BASE_REF=%GITHUB_REF%
+          set BOOST_BRANCH=develop
+          for /f %%i in ("%GITHUB_BASE_REF%") do if "%%~nxi" == "master" set BOOST_BRANCH=master
+          echo BOOST_BRANCH: %BOOST_BRANCH%
+          cd ..
+          git clone -b %BOOST_BRANCH% --depth 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          xcopy /s /e /q %GITHUB_WORKSPACE% libs\%LIBRARY%\
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py --git_args "--jobs 3" %LIBRARY%
+
+      - name: Use library with add_subdirectory (Debug)
+        shell: cmd
+        run: |
+          cd ../boost-root/libs/%LIBRARY%/test/cmake_subdir_test
+          mkdir __build__ && cd __build__
+          cmake ..
+          cmake --build . --config Debug
+          ctest --output-on-failure --no-tests=error -C Debug
+
+      - name: Use library with add_subdirectory (Release)
+        shell: cmd
+        run: |
+          cd ../boost-root/libs/%LIBRARY%/test/cmake_subdir_test/__build__
+          cmake --build . --config Release
+          ctest --output-on-failure --no-tests=error -C Release
+
+  windows-cmake-install:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: windows-latest
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Boost
+        shell: cmd
+        run: |
+          echo GITHUB_REPOSITORY: %GITHUB_REPOSITORY%
+          for /f %%i in ("%GITHUB_REPOSITORY%") do set LIBRARY=%%~nxi
+          echo LIBRARY: %LIBRARY%
+          echo LIBRARY=%LIBRARY%>>%GITHUB_ENV%
+          echo GITHUB_BASE_REF: %GITHUB_BASE_REF%
+          echo GITHUB_REF: %GITHUB_REF%
+          if "%GITHUB_BASE_REF%" == "" set GITHUB_BASE_REF=%GITHUB_REF%
+          set BOOST_BRANCH=develop
+          for /f %%i in ("%GITHUB_BASE_REF%") do if "%%~nxi" == "master" set BOOST_BRANCH=master
+          echo BOOST_BRANCH: %BOOST_BRANCH%
+          cd ..
+          git clone -b %BOOST_BRANCH% --depth 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          xcopy /s /e /q %GITHUB_WORKSPACE% libs\%LIBRARY%\
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py --git_args "--jobs 3" %LIBRARY%
+
+      - name: Configure
+        shell: cmd
+        run: |
+          cd ../boost-root
+          mkdir __build__ && cd __build__
+          cmake -DBOOST_INCLUDE_LIBRARIES=%LIBRARY% -DCMAKE_INSTALL_PREFIX=C:/cmake-prefix ..
+
+      - name: Install (Debug)
+        shell: cmd
+        run: |
+          cd ../boost-root/__build__
+          cmake --build . --target install --config Debug
+
+      - name: Install (Release)
+        shell: cmd
+        run: |
+          cd ../boost-root/__build__
+          cmake --build . --target install --config Release
+
+      - name: Use the installed library (Debug)
+        shell: cmd
+        run: |
+          cd ../boost-root/libs/%LIBRARY%/test/cmake_install_test && mkdir __build__ && cd __build__
+          cmake -DCMAKE_INSTALL_PREFIX=C:/cmake-prefix ..
+          cmake --build . --config Debug
+          ctest --output-on-failure --no-tests=error -C Debug
+
+      - name: Use the installed library (Release)
+        shell: cmd
+        run: |
+          cd ../boost-root/libs/%LIBRARY%/test/cmake_install_test/__build__
+          cmake --build . --config Release
+          ctest --output-on-failure --no-tests=error -C Release
+
+  windows-cmake-test:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: windows-latest
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Boost
+        shell: cmd
+        run: |
+          echo GITHUB_REPOSITORY: %GITHUB_REPOSITORY%
+          for /f %%i in ("%GITHUB_REPOSITORY%") do set LIBRARY=%%~nxi
+          echo LIBRARY: %LIBRARY%
+          echo LIBRARY=%LIBRARY%>>%GITHUB_ENV%
+          echo GITHUB_BASE_REF: %GITHUB_BASE_REF%
+          echo GITHUB_REF: %GITHUB_REF%
+          if "%GITHUB_BASE_REF%" == "" set GITHUB_BASE_REF=%GITHUB_REF%
+          set BOOST_BRANCH=develop
+          for /f %%i in ("%GITHUB_BASE_REF%") do if "%%~nxi" == "master" set BOOST_BRANCH=master
+          echo BOOST_BRANCH: %BOOST_BRANCH%
+          cd ..
+          git clone -b %BOOST_BRANCH% --depth 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          xcopy /s /e /q %GITHUB_WORKSPACE% libs\%LIBRARY%\
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py --git_args "--jobs 3" %LIBRARY%
+
+      - name: Configure
+        shell: cmd
+        run: |
+          cd ../boost-root
+          mkdir __build__ && cd __build__
+          cmake -DBOOST_INCLUDE_LIBRARIES=%LIBRARY% -DBUILD_TESTING=ON ..
+
+      - name: Build tests (Debug)
+        shell: cmd
+        run: |
+          cd ../boost-root/__build__
+          cmake --build . --target tests --config Debug
+
+      - name: Run tests (Debug)
+        shell: cmd
+        run: |
+          cd ../boost-root/__build__
+          ctest --output-on-failure --no-tests=error -C Debug
+
+      - name: Build tests (Release)
+        shell: cmd
+        run: |
+          cd ../boost-root/__build__
+          cmake --build . --target tests --config Release
+
+      - name: Run tests (Release)
+        shell: cmd
+        run: |
+          cd ../boost-root/__build__
+          ctest --output-on-failure --no-tests=error -C Release

CMakeLists.txt

@@ -1,10 +1,10 @@
 # Copyright 2018 Mike Dev
-# Copyright 2019 Peter Dimov
+# Copyright 2019, 2025 Peter Dimov
 # Distributed under the Boost Software License, Version 1.0.
-# See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
+# https://www.boost.org/LICENSE_1_0.txt
 
-# We support CMake 3.5, but prefer 3.16 policies and behavior
+# We support CMake 3.5, but prefer 3.31 policies and behavior
-cmake_minimum_required(VERSION 3.5...3.16)
+cmake_minimum_required(VERSION 3.5...3.31)
 
 project(boost_static_assert VERSION "${BOOST_SUPERPROJECT_VERSION}" LANGUAGES CXX)
 

README.md

@@ -4,33 +4,4 @@ Boost StaticAssert Library
 The Boost StaticAssert library provides static assertions for C++, this library is the ancestor to C++ native static_assert's and 
 can be used on older compilers which don't have that feature.
 
-The full documentation is available on [boost.org](http://www.boost.org/doc/libs/release/libs/static_assert).
+This library has been merged into [Boost.Config](https://github.com/boostorg/config). The full documentation is available on [boost.org](https://www.boost.org/doc/libs/release/libs/config).
-
-## Support, bugs and feature requests ##
-
-Bugs and feature requests can be reported through the [Gitub issue tracker](https://github.com/boostorg/static_assert/issues)
-(see [open issues](https://github.com/boostorg/static_assert/issues) and
-[closed issues](https://github.com/boostorg/static_assert/issues?utf8=%E2%9C%93&q=is%3Aissue+is%3Aclosed)).
-
-You can submit your changes through a [pull request](https://github.com/boostorg/static_assert/pulls).
-
-There is no mailing-list specific to Boost StaticAssert, although you can use the general-purpose Boost [mailing-list](http://lists.boost.org/mailman/listinfo.cgi/boost-users) using the tag [static_assert].
-
-
-## Development ##
-
-Clone the whole boost project, which includes the individual Boost projects as submodules ([see boost+git doc](https://github.com/boostorg/boost/wiki/Getting-Started)): 
-
-    git clone https://github.com/boostorg/boost
-    cd boost
-    git submodule update --init
-
-The Boost StaticAssert Library is located in `libs/static_assert/`. 
-
-### Running tests ###
-First, make sure you are in `libs/static_assert/test`. 
-You can either run all the tests listed in `Jamfile.v2` or run a single test:
-
-    ../../../b2                        <- run all tests
-    ../../../b2 static_assert_test     <- single test
-

doc/Jamfile.v2

@@ -1,49 +0,0 @@
-
-# Copyright John Maddock 2005. Use, modification, and distribution are
-# subject to the Boost Software License, Version 1.0. (See accompanying
-# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-
-using quickbook ;
-
-path-constant boost-images : ../../../doc/src/images ;
-
-xml static_assert : static_assert.qbk ;
-boostbook standalone
-    :
-        static_assert
-    :
-        <xsl:param>boost.root=../../../..
-        <xsl:param>nav.layout=none
-        <xsl:param>navig.graphics=0
-        # PDF Options:
-        # TOC Generation: this is needed for FOP-0.9 and later:
-        <xsl:param>fop1.extensions=0
-        # Or enable this if you're using XEP:
-        <xsl:param>xep.extensions=1
-        # TOC generation: this is needed for FOP 0.2, but must not be set to zero for FOP-0.9!
-        <xsl:param>fop.extensions=0
-        # No indent on body text:
-        <xsl:param>body.start.indent=0pt
-        # Margin size:
-        <xsl:param>page.margin.inner=0.5in
-        # Margin size:
-        <xsl:param>page.margin.outer=0.5in
-        # Yes, we want graphics for admonishments:
-        <xsl:param>admon.graphics=1
-        # Set this one for PDF generation *only*:
-        # default pnd graphics are awful in PDF form,
-        # better use SVG's instead:
-        <format>pdf:<xsl:param>admon.graphics.extension=".svg"
-        <format>pdf:<xsl:param>admon.graphics.path=$(boost-images)/
-        <format>pdf:<xsl:param>boost.url.prefix=http://www.boost.org/doc/libs/release/doc/html
-    ;
-
-###############################################################################
-alias boostdoc
-    : static_assert
-    :
-    :
-    : ;
-explicit boostdoc ;
-alias boostrelease ;
-explicit boostrelease ;

doc/static_assert.qbk

@@ -1,243 +0,0 @@
-[library Boost.StaticAssert
-    [copyright 2000 2005 Steve Cleary and John Maddock]
-    [purpose Compile time diagnostics library]
-    [license
-        Distributed under the Boost Software License, Version 1.0.
-        (See accompanying file LICENSE_1_0.txt or copy at
-        <ulink url="http://www.boost.org/LICENSE_1_0.txt">
-            http://www.boost.org/LICENSE_1_0.txt
-        </ulink>)
-    ]
-    [authors [Maddock, John], [Cleary, Steve]]
-    [category template]
-    [category testing]
-    [category generic]
-    [last-revision $Date$]
-]
-
-This manual is also available in 
-[@http://sourceforge.net/projects/boost/files/boost-docs/ 
-printer friendly PDF format].
-
-[section:intro Overview and Tutorial]
-
-The header `<boost/static_assert.hpp>` supplies two macros:
-
-   BOOST_STATIC_ASSERT(x)
-   BOOST_STATIC_ASSERT_MSG(x, msg)
-   
-Both generate a compile time error message if the integral-constant-expression `x`
-is not true. In other words, they are the compile time equivalent of the assert macro; 
-this is sometimes known as a "compile-time-assertion", but will be called a 
-"static assertion" throughout these docs. Note that if the condition is `true`, 
-then the macros will generate neither code nor data - and the macros can also 
-be used at either namespace, class or function scope. When used in a template, 
-the static assertion will be evaluated at the time the template is instantiated; 
-this is particularly useful for validating template parameters.
-
-If the C++0x `static_assert` feature is available, both macros will use it.
-For `BOOST_STATIC_ASSERT(x)`, the error message will be a stringized version of `x`.
-For `BOOST_STATIC_ASSERT_MSG(x, msg)`, the error message will be the `msg` string.
-
-If the C++0x `static_assert` feature is not available, `BOOST_STATIC_ASSERT_MSG(x, msg)`
-will be treated as `BOOST_STATIC_ASSERT(x)`.
-
-The material that follows assumes the C++0x `static_assert` feature is not available.
-
-One of the aims of `BOOST_STATIC_ASSERT` is to generate readable error messages. 
-These immediately tell the user that a library is being used in a manner that 
-is not supported. While error messages obviously differ from compiler to compiler, 
-but you should see something like: 
-
-   Illegal use of STATIC_ASSERTION_FAILURE<false>
-
-Which is intended to at least catch the eye!
-
-You can use `BOOST_STATIC_ASSERT` at any place where you can place a declaration, 
-that is at class, function or namespace scope, this is illustrated by the 
-following examples:
-
-[section:namespace Use at namespace scope.]
-
-The macro can be used at namespace scope, if there is some requirement must 
-always be true; generally this means some platform specific requirement. 
-Suppose we require that `int` be at least a 32-bit integral type, and that `wchar_t` 
-be an unsigned type. We can verify this at compile time as follows:
-
-   #include <climits>
-   #include <cwchar>
-   #include <limits>
-   #include <boost/static_assert.hpp>
-
-   namespace my_conditions {
-
-      BOOST_STATIC_ASSERT(std::numeric_limits<int>::digits >= 32);
-      BOOST_STATIC_ASSERT(WCHAR_MIN >= 0);
-
-   } // namespace my_conditions
-
-The use of the namespace my_conditions here requires some comment. 
-The macro `BOOST_STATIC_ASSERT` works by generating an typedef declaration, 
-and since the typedef must have a name, the macro generates one automatically by 
-mangling a stub name with the value of `__LINE__`. When `BOOST_STATIC_ASSERT` is 
-used at either class or function scope then each use of `BOOST_STATIC_ASSERT` 
-is guaranteed to produce a name unique to that scope (provided you only use 
-the macro once on each line). However when used in a header at namespace 
-scope, that namespace can be continued over multiple headers, each of which 
-may have their own static assertions, and on the "same" lines, thereby generating 
-duplicate declarations. In theory the compiler should silently ignore duplicate 
-typedef declarations, however many do not do so (and even if they do they are 
-entitled to emit warnings in such cases). To avoid potential problems, if you 
-use `BOOST_STATIC_ASSERT` in a header and at namespace scope, then enclose 
-them in a namespace unique to that header.
-
-[endsect]
-
-[section:function Use at function scope]
-
-The macro is typically used at function scope inside template functions, 
-when the template arguments need checking. Imagine that we have an 
-iterator-based algorithm that requires random access iterators. 
-If the algorithm is instantiated with iterators that do not meet our 
-requirements then an error will be generated eventually, but this may 
-be nested deep inside several templates, making it hard for the user to 
-determine what went wrong. One option is to add a static assertion at 
-the top level of the template, in that case if the condition is not met, 
-then an error will be generated in a way that makes it reasonably obvious to 
-the user that the template is being misused.
-
-   #include <iterator>
-   #include <boost/static_assert.hpp>
-   #include <boost/type_traits.hpp>
-
-   template <class RandomAccessIterator >
-   RandomAccessIterator foo(RandomAccessIterator from, 
-                            RandomAccessIterator to)
-   {
-      // this template can only be used with
-      // random access iterators...
-      typedef typename std::iterator_traits< 
-            RandomAccessIterator >::iterator_category cat;
-      BOOST_STATIC_ASSERT(
-         (boost::is_convertible<
-            cat, 
-            const std::random_access_iterator_tag&>::value));
-      //
-      // detail goes here...
-      return from;
-   }
-
-A couple of footnotes are in order here: the extra set of parenthesis around the 
-assert, is to prevent the comma inside the `is_convertible` template being 
-interpreted by the preprocessor as a macro argument separator; the target type 
-for `is_convertible` is a reference type, as some compilers have problems 
-using `is_convertible` when the conversion is via a user defined constructor 
-(in any case there is no guarantee that the iterator tag classes are 
-copy-constructible).
-
-[endsect]
-
-[section:class Use at class scope]
-
-The macro is typically used inside classes that are templates. 
-Suppose we have a template-class that requires an unsigned integral type with 
-at least 16-bits of precision as a template argument, we can achieve this 
-using something like this:
-
-   #include <limits>
-   #include <boost/static_assert.hpp>
-
-   template <class UnsignedInt>
-   class myclass
-   {
-   private:
-      BOOST_STATIC_ASSERT_MSG(std::numeric_limits<UnsignedInt>::is_specialized, "myclass can only be specialized for types with numeric_limits support.");
-      BOOST_STATIC_ASSERT_MSG(std::numeric_limits<UnsignedInt>::digits >= 16, "Template argument UnsignedInt must have at least 16 bits precision.")
-      BOOST_STATIC_ASSERT_MSG(std::numeric_limits<UnsignedInt>::is_integer, "Template argument UnsignedInt must be an integer.");
-      BOOST_STATIC_ASSERT_MSG(!std::numeric_limits<UnsignedInt>::is_signed, "Template argument UnsignedInt must not be signed.");
-   public:
-      /* details here */
-   };
-
-[endsect]
-
-[section:templates Use in templates]
-
-Normally static assertions when used inside a class or function template, 
-will not be instantiated until the template in which it is used is instantiated.  
-However, there is one potential problem to watch out for: if the static assertion 
-is not dependent upon one or more template parameters, then the compiler is 
-permitted to evaluate the static assertion at the point it is first seen, 
-irrespective of whether the template is ever instantiated, for example:
-
-   template <class T>
-   struct must_not_be_instantiated
-   {   
-      BOOST_STATIC_ASSERT(false);
-   };
-
-Will produce a compiler error with some compilers (for example Intel 8.1 
-or gcc 3.4), regardless of whether the template is ever instantiated.  A 
-workaround in cases like this is to force the assertion to be dependent 
-upon a template parameter:
-
-   template <class T>
-   struct must_not_be_instantiated
-   {   
-      // this will be triggered if this type is instantiated
-      BOOST_STATIC_ASSERT(sizeof(T) == 0); 
-   };
-
-
-[endsect]
-
-[endsect]
-
-[section:how How it works]
-
-`BOOST_STATIC_ASSERT` works as follows. There is class `STATIC_ASSERTION_FAILURE`
- which is defined as:
-
-   namespace boost{
-
-   template <bool> struct STATIC_ASSERTION_FAILURE;
-
-   template <> struct STATIC_ASSERTION_FAILURE<true>{};
-
-   }
-
-The key feature is that the error message triggered by the undefined 
-expression `sizeof(STATIC_ASSERTION_FAILURE<0>)`, tends to be consistent 
-across a wide variety of compilers. The rest of the machinery of 
-`BOOST_STATIC_ASSERT` is just a way to feed the `sizeof` expression into a `typedef`. 
-The use of a macro here is somewhat ugly; however boost members have spent 
-considerable effort trying to invent a static assert that avoided macros, 
-all to no avail. The general conclusion was that the good of a static assert 
-working at namespace, function, and class scope outweighed the ugliness of a macro.
-
-[endsect]
-
-[section:test Test Programs]
-
-[table Test programs provided with static_assert
-[[Test Program][Expected to Compile][Description]]
-
-[[[@../../libs/static_assert/example/static_assert_example_1.cpp static_assert_example_1.cpp]] [Platform dependent.] [Namespace scope test program, may compile depending upon the platform. ]]
-[[[@../../libs/static_assert/example/static_assert_example_2.cpp static_assert_example_2.cpp]] [Yes] [Function scope test program. ]]
-[[[@../../libs/static_assert/example/static_assert_example_3.cpp static_assert_example_3.cpp]] [Yes] [Class scope test program. ]]
-[[[@../../libs/static_assert/test/static_assert_test.cpp static_assert_test.cpp]] [Yes] [Illustrates usage, and should always compile, really just tests compiler compatibility.]] 
-[[[@../../libs/static_assert/test/static_assert_test_fail_1.cpp static_assert_test_fail_1.cpp]] [No] [Illustrates failure at namespace scope. ]]
-[[[@../../libs/static_assert/test/static_assert_test_fail_2.cpp static_assert_test_fail_2.cpp]] [No] [Illustrates failure at non-template function scope. ]]
-[[[@../../libs/static_assert/test/static_assert_test_fail_3.cpp static_assert_test_fail_3.cpp]] [No] [Illustrates failure at non-template class scope. ]]
-[[[@../../libs/static_assert/test/static_assert_test_fail_4.cpp static_assert_test_fail_4.cpp]] [No] [Illustrates failure at non-template class scope. ]]
-[[[@../../libs/static_assert/test/static_assert_test_fail_5.cpp static_assert_test_fail_5.cpp]] [No] [Illustrates failure at template class scope. ]]
-[[[@../../libs/static_assert/test/static_assert_test_fail_6.cpp static_assert_test_fail_6.cpp]] [No] [Illustrates failure at template class member function scope. ]]
-[[[@../../libs/static_assert/test/static_assert_test_fail_7.cpp static_assert_test_fail_7.cpp]] [No] [Illustrates failure of class scope example. ]]
-[[[@../../libs/static_assert/test/static_assert_test_fail_8.cpp static_assert_test_fail_8.cpp]] [No] [Illustrates failure of function scope example. ]]
-[[[@../../libs/static_assert/test/static_assert_test_fail_9.cpp static_assert_test_fail_9.cpp]] [No] [Illustrates failure of function scope example (part 2). ]]
-
-]
-
-[endsect]
-
-

include/boost/static_assert.hpp

@@ -1,181 +0,0 @@
-//  (C) Copyright John Maddock 2000.
-//  Use, modification and distribution are subject to the 
-//  Boost Software License, Version 1.0. (See accompanying file 
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-
-//  See http://www.boost.org/libs/static_assert for documentation.
-
-/*
- Revision history:
-   02 August 2000
-      Initial version.
-*/
-
-#ifndef BOOST_STATIC_ASSERT_HPP
-#define BOOST_STATIC_ASSERT_HPP
-
-#include <boost/config.hpp>
-#include <boost/detail/workaround.hpp>
-#include <cstddef> //for std::size_t
-
-#if defined(__GNUC__) && !defined(__GXX_EXPERIMENTAL_CXX0X__)
-//
-// This is horrible, but it seems to be the only we can shut up the
-// "anonymous variadic macros were introduced in C99 [-Wvariadic-macros]"
-// warning that get spewed out otherwise in non-C++11 mode.
-//
-#pragma GCC system_header
-#endif
-
-#ifndef BOOST_NO_CXX11_STATIC_ASSERT
-#  ifndef BOOST_NO_CXX11_VARIADIC_MACROS
-#     define BOOST_STATIC_ASSERT_MSG( ... ) static_assert(__VA_ARGS__)
-#  else
-#     define BOOST_STATIC_ASSERT_MSG( B, Msg ) static_assert( B, Msg )
-#  endif
-#else
-#     define BOOST_STATIC_ASSERT_MSG( B, Msg ) BOOST_STATIC_ASSERT( B )
-#endif
-
-#ifdef BOOST_BORLANDC
-//
-// workaround for buggy integral-constant expression support:
-#define BOOST_BUGGY_INTEGRAL_CONSTANT_EXPRESSIONS
-#endif
-
-#if defined(__GNUC__) && (__GNUC__ == 3) && ((__GNUC_MINOR__ == 3) || (__GNUC_MINOR__ == 4))
-// gcc 3.3 and 3.4 don't produce good error messages with the default version:
-#  define BOOST_SA_GCC_WORKAROUND
-#endif
-
-//
-// If the compiler issues warnings about old C style casts,
-// then enable this:
-//
-#if defined(__GNUC__) && ((__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 4)))
-#  ifndef BOOST_NO_CXX11_VARIADIC_MACROS
-#     define BOOST_STATIC_ASSERT_BOOL_CAST( ... ) ((__VA_ARGS__) != 0)
-#  else
-#     define BOOST_STATIC_ASSERT_BOOL_CAST( x ) ((x) != 0)
-#  endif
-#else
-#  ifndef BOOST_NO_CXX11_VARIADIC_MACROS
-#     define BOOST_STATIC_ASSERT_BOOL_CAST( ... ) (bool)(__VA_ARGS__)
-#  else
-#     define BOOST_STATIC_ASSERT_BOOL_CAST(x) (bool)(x)
-#  endif
-#endif
-
-#ifndef BOOST_NO_CXX11_STATIC_ASSERT
-#  ifndef BOOST_NO_CXX11_VARIADIC_MACROS
-#     define BOOST_STATIC_ASSERT( ... ) static_assert(__VA_ARGS__, #__VA_ARGS__)
-#  else
-#     define BOOST_STATIC_ASSERT( B ) static_assert(B, #B)
-#  endif
-#else
-
-namespace boost{
-
-// HP aCC cannot deal with missing names for template value parameters
-template <bool x> struct STATIC_ASSERTION_FAILURE;
-
-template <> struct STATIC_ASSERTION_FAILURE<true> { enum { value = 1 }; };
-
-// HP aCC cannot deal with missing names for template value parameters
-template<std::size_t x> struct static_assert_test{};
-
-}
-
-//
-// Implicit instantiation requires that all member declarations be
-// instantiated, but that the definitions are *not* instantiated.
-//
-// It's not particularly clear how this applies to enum's or typedefs;
-// both are described as declarations [7.1.3] and [7.2] in the standard,
-// however some compilers use "delayed evaluation" of one or more of
-// these when implicitly instantiating templates.  We use typedef declarations
-// by default, but try defining BOOST_USE_ENUM_STATIC_ASSERT if the enum
-// version gets better results from your compiler...
-//
-// Implementation:
-// Both of these versions rely on sizeof(incomplete_type) generating an error
-// message containing the name of the incomplete type.  We use
-// "STATIC_ASSERTION_FAILURE" as the type name here to generate
-// an eye catching error message.  The result of the sizeof expression is either
-// used as an enum initialiser, or as a template argument depending which version
-// is in use...
-// Note that the argument to the assert is explicitly cast to bool using old-
-// style casts: too many compilers currently have problems with static_cast
-// when used inside integral constant expressions.
-//
-#if !defined(BOOST_BUGGY_INTEGRAL_CONSTANT_EXPRESSIONS)
-
-#if defined(BOOST_MSVC) && defined(BOOST_NO_CXX11_VARIADIC_MACROS)
-#define BOOST_STATIC_ASSERT( B ) \
-   typedef ::boost::static_assert_test<\
-      sizeof(::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST ( B ) >)>\
-         BOOST_JOIN(boost_static_assert_typedef_, __COUNTER__)
-#elif defined(BOOST_MSVC)
-#define BOOST_STATIC_ASSERT(...) \
-   typedef ::boost::static_assert_test<\
-      sizeof(::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST (__VA_ARGS__) >)>\
-         BOOST_JOIN(boost_static_assert_typedef_, __COUNTER__)
-#elif (defined(BOOST_INTEL_CXX_VERSION) || defined(BOOST_SA_GCC_WORKAROUND))  && defined(BOOST_NO_CXX11_VARIADIC_MACROS)
-// agurt 15/sep/02: a special care is needed to force Intel C++ issue an error 
-// instead of warning in case of failure
-# define BOOST_STATIC_ASSERT( B ) \
-    typedef char BOOST_JOIN(boost_static_assert_typedef_, __LINE__) \
-        [ ::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST( B ) >::value ]
-#elif (defined(BOOST_INTEL_CXX_VERSION) || defined(BOOST_SA_GCC_WORKAROUND))  && !defined(BOOST_NO_CXX11_VARIADIC_MACROS)
-// agurt 15/sep/02: a special care is needed to force Intel C++ issue an error 
-// instead of warning in case of failure
-# define BOOST_STATIC_ASSERT(...) \
-    typedef char BOOST_JOIN(boost_static_assert_typedef_, __LINE__) \
-        [ ::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST( __VA_ARGS__ ) >::value ]
-#elif defined(__sgi)
-// special version for SGI MIPSpro compiler
-#define BOOST_STATIC_ASSERT( B ) \
-   BOOST_STATIC_CONSTANT(bool, \
-     BOOST_JOIN(boost_static_assert_test_, __LINE__) = ( B )); \
-   typedef ::boost::static_assert_test<\
-     sizeof(::boost::STATIC_ASSERTION_FAILURE< \
-       BOOST_JOIN(boost_static_assert_test_, __LINE__) >)>\
-         BOOST_JOIN(boost_static_assert_typedef_, __LINE__)
-#elif BOOST_WORKAROUND(__MWERKS__, <= 0x3003)
-// special version for CodeWarrior <= 8.x
-#define BOOST_STATIC_ASSERT( B ) \
-   BOOST_STATIC_CONSTANT(int, \
-     BOOST_JOIN(boost_static_assert_test_, __LINE__) = \
-       sizeof(::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST( B ) >) )
-#else
-// generic version
-#  ifndef BOOST_NO_CXX11_VARIADIC_MACROS
-#     define BOOST_STATIC_ASSERT( ... ) \
-         typedef ::boost::static_assert_test<\
-            sizeof(::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST( __VA_ARGS__ ) >)>\
-               BOOST_JOIN(boost_static_assert_typedef_, __LINE__) BOOST_ATTRIBUTE_UNUSED
-#  else
-#     define BOOST_STATIC_ASSERT( B ) \
-         typedef ::boost::static_assert_test<\
-            sizeof(::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST( B ) >)>\
-               BOOST_JOIN(boost_static_assert_typedef_, __LINE__) BOOST_ATTRIBUTE_UNUSED
-#  endif
-#endif
-
-#else
-// alternative enum based implementation:
-#  ifndef BOOST_NO_CXX11_VARIADIC_MACROS
-#    define BOOST_STATIC_ASSERT( ... ) \
-         enum { BOOST_JOIN(boost_static_assert_enum_, __LINE__) \
-            = sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( __VA_ARGS__ ) >) }
-#  else
-#    define BOOST_STATIC_ASSERT(B) \
-         enum { BOOST_JOIN(boost_static_assert_enum_, __LINE__) \
-            = sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( B ) >) }
-#  endif
-#endif
-#endif // defined(BOOST_NO_CXX11_STATIC_ASSERT)
-
-#endif // BOOST_STATIC_ASSERT_HPP
-
-

include/boost/static_assert/detail/backward.hpp

@@ -0,0 +1,12 @@
+// Copyright 2025 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+// 
+// This header is unused and is only present for backward compatibility.
+// Without it, StaticAssert would be the only library without an include/
+// directory, and this breaks third-party installation scripts and logic.
+
+// Introduce an artificial dependency on Config, such that libraries that
+// link to StaticAssert depend on the new location of boost/static_assert.hpp
+
+#include <boost/config.hpp>

index.html

@@ -1,14 +1,11 @@
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html>
   <head>
-    <meta http-equiv="refresh" content="0; URL=../../doc/html/boost_staticassert.html">
+    <meta http-equiv="refresh" content="0; URL=../config/index.html">
   </head>
   <body>
     Automatic redirection failed, please go to
-    <a href="../../doc/html/boost_staticassert.html">../../doc/html/boost_staticassert.html</a>
+    <a href="../config/index.html">../config/index.html</a>.
-    or view the online version at 
-    <a href="http://www.boost.org/regression-logs/cs-win32_metacomm/doc/html/boost_staticassert.html">
-    http://www.boost.org/regression-logs/cs-win32_metacomm/doc/html/boost_staticassert.html</a>
       <P>Copyright&nbsp;John Maddock 2006</P>
       <P>Distributed under the Boost Software License, Version 1.0. (See accompanying file <A href="../../LICENSE_1_0.txt">
             LICENSE_1_0.txt</A> or copy at <A href="http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</A>).</P>

meta/libraries.json

@@ -4,7 +4,7 @@
     "authors": [
         "John Maddock"
     ],
-    "description": "Static assertions (compile time assertions).",
+    "description": "Static assertions (compile time assertions). Merged into Boost.Config.",
     "category": [
         "Correctness",
         "Generic",

static_assert.htm

@@ -1,14 +1,11 @@
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html>
   <head>
-    <meta http-equiv="refresh" content="0; URL=../../doc/html/boost_staticassert.html">
+    <meta http-equiv="refresh" content="0; URL=../config/index.html">
   </head>
   <body>
     Automatic redirection failed, please go to
-    <a href="../../doc/html/boost_staticassert.html">../../doc/html/boost_staticassert.html</a>
+    <a href="../config/index.html">../config/index.html</a>.
-    or view the online version at 
-    <a href="http://www.boost.org/regression-logs/cs-win32_metacomm/doc/html/boost_staticassert.html">
-    http://www.boost.org/regression-logs/cs-win32_metacomm/doc/html/boost_staticassert.html</a>
       <P>Copyright&nbsp;John Maddock 2006</P>
       <P>Distributed under the Boost Software License, Version 1.0. (See accompanying file <A href="../../LICENSE_1_0.txt">
             LICENSE_1_0.txt</A> or copy at <A href="http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</A>).</P>