Fixed AppVeyor image name for 32-bit MinGW-w64 gcc 8.3.

Recent change to Boost.Math, on which Boost.Graph depends, made it
incompatible with MSVC 14.0. Rather than check for a specific compiler
version, add a configure-time check whether Boost.Graph compiles (or
at least the part that is used in Boost.Parameter tests). Disable the
tests that depend on Boost.Graph if that check fails.

Refs https://github.com/boostorg/math/issues/1275.

.github/workflows/ci.yml

@@ -1,4 +1,4 @@
-# Copyright 2021 Andrey Semashev
+# Copyright 2021-2025 Andrey Semashev
 #
 # 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)
@@ -33,209 +33,284 @@ jobs:
       matrix:
         include:
           # Linux, gcc
-          - toolset: gcc-4.4
-            cxxstd: "98,0x"
-            os: ubuntu-20.04
-            container: ubuntu:16.04
-            install:
-              - g++-4.4
-            sources:
-              - "ppa:ubuntu-toolchain-r/test"
-          - toolset: gcc-4.6
-            cxxstd: "03,0x"
-            os: ubuntu-20.04
-            container: ubuntu:16.04
-            install:
-              - g++-4.6
-            sources:
-              - "ppa:ubuntu-toolchain-r/test"
-          - toolset: gcc-4.7
-            cxxstd: "03,11"
-            os: ubuntu-20.04
-            container: ubuntu:16.04
-            install:
-              - g++-4.7
           - toolset: gcc-4.8
-            cxxstd: "03,11"
-            os: ubuntu-18.04
+            cxxstd: "11"
+            os: ubuntu-latest
+            container: ubuntu:18.04
             install:
               - g++-4.8
           - toolset: gcc-4.9
-            cxxstd: "03,11"
-            os: ubuntu-20.04
+            cxxstd: "11"
+            os: ubuntu-latest
             container: ubuntu:16.04
             install:
               - g++-4.9
           - toolset: gcc-5
-            cxxstd: "03,11,14,1z"
-            os: ubuntu-20.04
+            cxxstd: "11,14,1z"
+            os: ubuntu-latest
             container: ubuntu:16.04
             install:
               - g++-5
           - toolset: gcc-6
-            cxxstd: "03,11,14,1z"
-            os: ubuntu-18.04
+            cxxstd: "11,14,1z"
+            os: ubuntu-latest
+            container: ubuntu:18.04
             install:
               - g++-6
           - toolset: gcc-7
-            cxxstd: "03,11,14,17"
-            os: ubuntu-18.04
+            cxxstd: "11,14,17"
+            os: ubuntu-latest
+            container: ubuntu:18.04
             install:
               - g++-7
           - toolset: gcc-8
-            cxxstd: "03,11,14,17,2a"
-            os: ubuntu-18.04
+            cxxstd: "11,14,17,2a"
+            os: ubuntu-latest
+            container: ubuntu:18.04
             install:
               - g++-8
           - toolset: gcc-9
-            cxxstd: "03,11,14,17,2a"
-            os: ubuntu-18.04
+            cxxstd: "11,14,17,2a"
+            os: ubuntu-latest
+            container: ubuntu:20.04
             install:
               - g++-9
           - toolset: gcc-10
-            cxxstd: "03,11,14,17,20"
-            os: ubuntu-20.04
+            cxxstd: "11,14,17,20"
+            os: ubuntu-latest
+            container: ubuntu:20.04
             install:
               - g++-10
           - toolset: gcc-11
-            cxxstd: "03,11,14,17,20"
-            os: ubuntu-20.04
+            cxxstd: "11,14,17,20,23"
+            os: ubuntu-22.04
             install:
               - g++-11
-            sources:
-              - "ppa:ubuntu-toolchain-r/test"
+          - toolset: gcc-12
+            cxxstd: "11,14,17,20,23"
+            os: ubuntu-22.04
+            install:
+              - g++-12
+          - toolset: gcc-13
+            cxxstd: "11,14,17,20,23"
+            os: ubuntu-24.04
+            install:
+              - g++-13
+          - toolset: gcc-14
+            cxxstd: "11,14,17,20,23,26"
+            os: ubuntu-24.04
+            install:
+              - g++-14
+          - toolset: gcc-15
+            cxxstd: "11,14,17,20,23,26"
+            os: ubuntu-latest
+            container: ubuntu:25.04
+            install:
+              - g++-15
           - name: UBSAN
-            toolset: gcc-11
-            cxxstd: "03,11,14,17,20"
+            toolset: gcc-13
+            cxxstd: "11,14,17,20,23"
             ubsan: 1
             build_variant: debug
-            os: ubuntu-20.04
+            os: ubuntu-24.04
             install:
-              - g++-11
-            sources:
-              - "ppa:ubuntu-toolchain-r/test"
+              - g++-13
 
           # Linux, clang
           - toolset: clang
             compiler: clang++-3.5
-            cxxstd: "03,11"
-            os: ubuntu-20.04
+            cxxstd: "11"
+            os: ubuntu-latest
             container: ubuntu:16.04
             install:
               - clang-3.5
           - toolset: clang
             compiler: clang++-3.6
-            cxxstd: "03,11,14"
-            os: ubuntu-20.04
+            cxxstd: "11,14"
+            os: ubuntu-latest
             container: ubuntu:16.04
             install:
               - clang-3.6
           - toolset: clang
             compiler: clang++-3.7
-            cxxstd: "03,11,14"
-            os: ubuntu-20.04
+            cxxstd: "11,14"
+            os: ubuntu-latest
             container: ubuntu:16.04
             install:
               - clang-3.7
           - toolset: clang
             compiler: clang++-3.8
-            cxxstd: "03,11,14"
-            os: ubuntu-20.04
+            cxxstd: "11,14"
+            os: ubuntu-latest
             container: ubuntu:16.04
             install:
               - clang-3.8
           - toolset: clang
             compiler: clang++-3.9
-            cxxstd: "03,11,14"
-            os: ubuntu-18.04
+            cxxstd: "11,14"
+            os: ubuntu-latest
+            container: ubuntu:18.04
             install:
               - clang-3.9
           - toolset: clang
             compiler: clang++-4.0
-            cxxstd: "03,11,14"
-            os: ubuntu-18.04
+            cxxstd: "11,14"
+            os: ubuntu-latest
+            container: ubuntu:18.04
             install:
               - clang-4.0
           - toolset: clang
             compiler: clang++-5.0
-            cxxstd: "03,11,14,1z"
-            os: ubuntu-18.04
+            cxxstd: "11,14,1z"
+            os: ubuntu-latest
+            container: ubuntu:18.04
             install:
               - clang-5.0
           - toolset: clang
             compiler: clang++-6.0
-            cxxstd: "03,11,14,17"
-            os: ubuntu-18.04
+            cxxstd: "11,14,17"
+            os: ubuntu-latest
+            container: ubuntu:18.04
             install:
               - clang-6.0
           - toolset: clang
             compiler: clang++-7
-            cxxstd: "03,11,14,17"
-            os: ubuntu-18.04
+            cxxstd: "11,14,17"
+            os: ubuntu-latest
+            container: ubuntu:18.04
             install:
               - clang-7
           # Note: clang-8 does not fully support C++20, so it is not compatible with libstdc++-8 in this mode
           - toolset: clang
             compiler: clang++-8
-            cxxstd: "03,11,14,17,2a"
-            os: ubuntu-18.04
+            cxxstd: "11,14,17,2a"
+            os: ubuntu-latest
+            container: ubuntu:18.04
             install:
               - clang-8
               - g++-7
             gcc_toolchain: 7
           - toolset: clang
             compiler: clang++-9
-            cxxstd: "03,11,14,17,2a"
-            os: ubuntu-20.04
+            cxxstd: "11,14,17,2a"
+            os: ubuntu-latest
+            container: ubuntu:20.04
             install:
               - clang-9
           - toolset: clang
             compiler: clang++-10
-            cxxstd: "03,11,14,17,20"
-            os: ubuntu-20.04
+            cxxstd: "11,14,17,20"
+            os: ubuntu-latest
+            container: ubuntu:20.04
             install:
               - clang-10
           - toolset: clang
             compiler: clang++-11
-            cxxstd: "03,11,14,17,20"
-            os: ubuntu-20.04
+            cxxstd: "11,14,17,20"
+            os: ubuntu-22.04
             install:
               - clang-11
           - toolset: clang
             compiler: clang++-12
-            cxxstd: "03,11,14,17,20"
-            os: ubuntu-20.04
+            cxxstd: "11,14,17,20,2b"
+            os: ubuntu-22.04
             install:
               - clang-12
+              - g++-11
+            gcc_toolchain: 11
           - toolset: clang
-            compiler: clang++-12
-            cxxstd: "03,11,14,17,20"
-            os: ubuntu-20.04
+            compiler: clang++-13
+            cxxstd: "11,14,17,20,2b"
+            os: ubuntu-22.04
             install:
-              - clang-12
-              - libc++-12-dev
-              - libc++abi-12-dev
+              - clang-13
+              - g++-11
+            gcc_toolchain: 11
+          - toolset: clang
+            compiler: clang++-14
+            cxxstd: "11,14,17,20,2b"
+            os: ubuntu-22.04
+            install:
+              - clang-14
+              - g++-11
+            gcc_toolchain: 11
+          - toolset: clang
+            compiler: clang++-15
+            cxxstd: "11,14,17,20,2b"
+            os: ubuntu-22.04
+            install:
+              - clang-15
+              - g++-11
+            gcc_toolchain: 11
+          - toolset: clang
+            compiler: clang++-16
+            cxxstd: "11,14,17,20,2b"
+            os: ubuntu-24.04
+            install:
+              - clang-16
+              - g++-11
+            gcc_toolchain: 11
+          - toolset: clang
+            compiler: clang++-17
+            cxxstd: "11,14,17,20,23"
+            os: ubuntu-24.04
+            install:
+              - clang-17
+              - g++-11
+            gcc_toolchain: 11
+          - toolset: clang
+            compiler: clang++-18
+            cxxstd: "11,14,17,20,23,26"
+            os: ubuntu-24.04
+            install:
+              - clang-18
+              - g++-13
+          - toolset: clang
+            compiler: clang++-19
+            cxxstd: "11,14,17,20,23,26"
+            os: ubuntu-24.04
+            install:
+              - clang-19
+          - toolset: clang
+            compiler: clang++-20
+            cxxstd: "11,14,17,20,23,26"
+            os: ubuntu-latest
+            container: ubuntu:25.04
+            install:
+              - clang-20
+          - toolset: clang
+            compiler: clang++-20
+            cxxstd: "11,14,17,20,23,26"
             cxxflags: -stdlib=libc++
             linkflags: -stdlib=libc++
+            os: ubuntu-latest
+            container: ubuntu:25.04
+            install:
+              - clang-20
+              - libc++-20-dev
+              - libc++abi-20-dev
           - name: UBSAN
             toolset: clang
-            compiler: clang++-12
-            cxxstd: "03,11,14,17,20"
+            compiler: clang++-18
+            cxxstd: "11,14,17,20,23,26"
             cxxflags: -stdlib=libc++
             linkflags: -stdlib=libc++
             ubsan: 1
             build_variant: debug
-            os: ubuntu-20.04
+            os: ubuntu-24.04
             install:
-              - clang-12
-              - libc++-12-dev
-              - libc++abi-12-dev
+              - clang-18
+              - libc++-18-dev
+              - libc++abi-18-dev
 
           - toolset: clang
-            cxxstd: "03,11,14,17,2a"
-            os: macos-10.15
+            cxxstd: "11,14,17,20,2b"
+            os: macos-13
+          - toolset: clang
+            cxxstd: "11,14,17,20,2b"
+            os: macos-14
 
-    timeout-minutes: 60
+    timeout-minutes: 30
     runs-on: ${{matrix.os}}
     container: ${{matrix.container}}
 
@@ -252,14 +327,34 @@ jobs:
                 echo "GHA_CONTAINER=${{matrix.container}}" >> $GITHUB_ENV
                 if [ -f "/etc/debian_version" ]
                 then
+                    # Use Azure APT mirrors in containers to avoid HTTP errors due to DDoS filters triggered by lots of CI jobs launching concurrently.
+                    # Note that not all Ubuntu versions support "mirror+file:..." URIs in APT sources, so just use Azure mirrors exclusively.
+                    # Note also that on recent Ubuntu versions DEB822 format is used for source files.
+                    APT_SOURCES=()
+                    if [ -d "/etc/apt/sources.list.d" ]
+                    then
+                        readarray -t APT_SOURCES < <(find "/etc/apt/sources.list.d" -type f -name '*.sources' -print)
+                    fi
+                    if [ -f "/etc/apt/sources.list" ]
+                    then
+                        APT_SOURCES+=("/etc/apt/sources.list")
+                    fi
+                    if [ "${#APT_SOURCES[@]}" -gt 0 ]
+                    then
+                        sed -i -E -e 's!([^ ]+) (http|https)://(archive|security)\.ubuntu\.com/ubuntu[^ ]*(.*)!\1 http://azure.archive.ubuntu.com/ubuntu/\4!' "${APT_SOURCES[@]}"
+                    fi
                     apt-get -o Acquire::Retries=$NET_RETRY_COUNT update
-                    apt-get -o Acquire::Retries=$NET_RETRY_COUNT install -y sudo software-properties-common tzdata wget curl apt-transport-https ca-certificates make build-essential g++ python python3 libpython-dev libpython3-dev perl git cmake
+                    if [ "$(apt-cache search "^python-is-python3$" | wc -l)" -ne 0 ]
+                    then
+                        PYTHON_PACKAGE="python-is-python3"
+                    else
+                        PYTHON_PACKAGE="python"
+                    fi
+                    apt-get -o Acquire::Retries=$NET_RETRY_COUNT install -y sudo software-properties-common tzdata wget curl apt-transport-https ca-certificates make build-essential g++ $PYTHON_PACKAGE python3 perl git cmake
                 fi
             fi
             git config --global pack.threads 0
 
-      - uses: actions/checkout@v2
-
       - name: Install packages
         if: matrix.install
         run: |
@@ -374,11 +469,25 @@ jobs:
             then
                 DEPINST_ARGS+=("--git_args" "--jobs $GIT_FETCH_JOBS")
             fi
+            mkdir -p snapshot
+            cd snapshot
+            echo "Downloading library snapshot: https://github.com/${GITHUB_REPOSITORY}/archive/${GITHUB_SHA}.tar.gz"
+            curl -L --retry "$NET_RETRY_COUNT" -o "${LIBRARY}-${GITHUB_SHA}.tar.gz" "https://github.com/${GITHUB_REPOSITORY}/archive/${GITHUB_SHA}.tar.gz"
+            tar -xf "${LIBRARY}-${GITHUB_SHA}.tar.gz"
+            if [ ! -d "${LIBRARY}-${GITHUB_SHA}" ]
+            then
+                echo "Library snapshot does not contain the library directory ${LIBRARY}-${GITHUB_SHA}:"
+                ls -la
+                exit 1
+            fi
+            rm -f "${LIBRARY}-${GITHUB_SHA}.tar.gz"
             cd ..
             git clone -b "$BOOST_BRANCH" --depth 1 "https://github.com/boostorg/boost.git" "boost-root"
             cd boost-root
-            mkdir -p libs/$LIBRARY
-            cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
+            mkdir -p libs
+            rm -rf "libs/$LIBRARY"
+            mv -f "../snapshot/${LIBRARY}-${GITHUB_SHA}" "libs/$LIBRARY"
+            rm -rf "../snapshot"
             git submodule update --init tools/boostdep
             DEPINST_ARGS+=("$LIBRARY")
             python tools/boostdep/depinst/depinst.py "${DEPINST_ARGS[@]}"
@@ -400,7 +509,7 @@ jobs:
       - name: Run tests
         if: matrix.cmake_tests == ''
         run: |
-            cd ../boost-root
+            cd boost-root
             B2_ARGS=("-j" "$BUILD_JOBS" "toolset=${{matrix.toolset}}" "cxxstd=${{matrix.cxxstd}}")
             if [ -n "${{matrix.build_variant}}" ]
             then
@@ -429,3 +538,70 @@ jobs:
             fi
             B2_ARGS+=("libs/$LIBRARY/test")
             ./b2 "${B2_ARGS[@]}"
+
+  windows:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - toolset: msvc-14.3
+            cxxstd: "14,17,20,latest"
+            addrmd: 32,64
+            os: windows-2022
+          - toolset: clang-win
+            cxxstd: "14,17,latest"
+            addrmd: 32,64
+            os: windows-2022
+          - toolset: gcc
+            cxxstd: "11,14,17,20,23"
+            addrmd: 64
+            os: windows-2022
+
+    timeout-minutes: 30
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - name: Setup Boost
+        shell: cmd
+        run: |
+            echo GITHUB_REPOSITORY: %GITHUB_REPOSITORY%
+            for /f %%i in ("%GITHUB_REPOSITORY%") do set LIBRARY=%%~nxi
+            echo LIBRARY: %LIBRARY%
+            echo LIBRARY=%LIBRARY%>>%GITHUB_ENV%
+            echo GITHUB_BASE_REF: %GITHUB_BASE_REF%
+            echo GITHUB_REF: %GITHUB_REF%
+            if "%GITHUB_BASE_REF%" == "" set GITHUB_BASE_REF=%GITHUB_REF%
+            set BOOST_BRANCH=develop
+            for /f %%i in ("%GITHUB_BASE_REF%") do if "%%~nxi" == "master" set BOOST_BRANCH=master
+            echo BOOST_BRANCH: %BOOST_BRANCH%
+            mkdir snapshot
+            cd snapshot
+            echo Downloading library snapshot: https://github.com/%GITHUB_REPOSITORY%/archive/%GITHUB_SHA%.zip
+            curl -L --retry %NET_RETRY_COUNT% -o "%LIBRARY%-%GITHUB_SHA%.zip" "https://github.com/%GITHUB_REPOSITORY%/archive/%GITHUB_SHA%.zip"
+            tar -xf "%LIBRARY%-%GITHUB_SHA%.zip"
+            if not exist "%LIBRARY%-%GITHUB_SHA%\" (
+                echo Library snapshot does not contain the library directory %LIBRARY%-%GITHUB_SHA%:
+                dir
+                exit /b 1
+            )
+            del /f "%LIBRARY%-%GITHUB_SHA%.zip"
+            cd ..
+            git clone -b %BOOST_BRANCH% --depth 1 https://github.com/boostorg/boost.git boost-root
+            cd boost-root
+            if not exist "libs\" mkdir libs
+            if exist "libs\%LIBRARY%\" rmdir /s /q "libs\%LIBRARY%"
+            move /Y "..\snapshot\%LIBRARY%-%GITHUB_SHA%" "libs\%LIBRARY%"
+            rmdir /s /q "..\snapshot"
+            git submodule update --init tools/boostdep
+            python tools/boostdep/depinst/depinst.py --git_args "--jobs %GIT_FETCH_JOBS%" %LIBRARY%
+            cmd /c bootstrap
+            b2 -d0 headers
+
+      - name: Run tests
+        shell: cmd
+        run: |
+            cd boost-root
+            if not "${{matrix.cxxstd}}" == "" set CXXSTD=cxxstd=${{matrix.cxxstd}}
+            if not "${{matrix.addrmd}}" == "" set ADDRMD=address-model=${{matrix.addrmd}}
+            if not "${{matrix.build_variant}}" == "" (set BUILD_VARIANT=variant=${{matrix.build_variant}}) else (set BUILD_VARIANT=variant=%DEFAULT_BUILD_VARIANT%)
+            b2 -j %NUMBER_OF_PROCESSORS% libs/%LIBRARY%/test toolset=${{matrix.toolset}} %CXXSTD% %ADDRMD% %BUILD_VARIANT% embed-manifest-via=linker

appveyor.yml

@@ -1,6 +1,6 @@
 # Copyright 2017 Edward Diener
 # Copyright 2017 Cromwell D. Enage
-# Copyright 2021 Andrey Semashev
+# Copyright 2021-2025 Andrey Semashev
 # 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)
@@ -17,36 +17,38 @@ branches:
 
 environment:
   matrix:
-    - ARGS: toolset=msvc-9.0,msvc-10.0,msvc-11.0,msvc-12.0 address-model=32
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
     - ARGS: toolset=msvc-14.0 address-model=32,64 cxxstd=14,latest
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
     - ARGS: toolset=msvc-14.1 address-model=32,64 cxxstd=14,17,latest
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-    - ARGS: toolset=msvc-14.2 address-model=32,64 cxxstd=14,17,latest
+    - ARGS: toolset=msvc-14.2 address-model=32,64 cxxstd=14,17,20,latest
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    - ARGS: toolset=gcc address-model=32 cxxstd=03,11,14,1z
+    - ARGS: toolset=msvc-14.3 address-model=32,64 cxxstd=14,17,20,latest
+      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2022
+    - ARGS: toolset=clang-win address-model=64 cxxstd=14,17,latest
+      ENV_SCRIPT: C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat
+      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+    - ARGS: toolset=clang-win address-model=32 cxxstd=14,17,latest
+      ENV_SCRIPT: C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars32.bat
+      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+    - ARGS: toolset=gcc address-model=32 cxxstd=11,14,1z
       PATH: C:\cygwin\bin;%PATH%
-      # Cygwin does not have python headers installed, the compiler picks up Win32 headers in C:\Python27\Include and fails
-      BOOST_PARAMETER_TEST_WITHOUT_PYTHON_TESTS: 1
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-    - ARGS: toolset=gcc address-model=64 cxxstd=03,11,14,1z
+    - ARGS: toolset=gcc address-model=64 cxxstd=11,14,1z
       PATH: C:\cygwin64\bin;%PATH%
-      # Cygwin64 does not have python headers installed, the compiler picks up Win32 headers in C:\Python27\Include and fails
-      BOOST_PARAMETER_TEST_WITHOUT_PYTHON_TESTS: 1
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-    - ARGS: toolset=gcc address-model=32 cxxstd=03,11 linkflags=-Wl,-allow-multiple-definition
-      PATH: C:\MinGW\bin;%PATH%
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-    - ARGS: toolset=gcc address-model=32 cxxstd=03,11,14
+    - ARGS: toolset=gcc address-model=32 cxxstd=11,14
       PATH: C:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\bin;%PATH%
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-    - ARGS: toolset=gcc address-model=64 cxxstd=03,11,14,1z
-      PATH: C:\mingw-w64\x86_64-6.3.0-posix-seh-rt_v5-rev1\mingw64\bin;%PATH%
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-    - ARGS: toolset=gcc address-model=64 cxxstd=03,11,14,1z
+    - ARGS: toolset=gcc address-model=64 cxxstd=11,14,1z
       PATH: C:\mingw-w64\x86_64-7.3.0-posix-seh-rt_v5-rev0\mingw64\bin;%PATH%
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+    - ARGS: toolset=gcc address-model=64 cxxstd=11,14,17,2a
+      PATH: C:\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw64\bin;%PATH%
+      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+    - ARGS: toolset=gcc address-model=32 cxxstd=11,14,17,2a
+      PATH: C:\mingw-w64\i686-8.1.0-posix-dwarf-rt_v6-rev0\mingw32\bin;%PATH%
+      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
 
 install:
   - set GIT_FETCH_JOBS=8
@@ -60,14 +62,14 @@ install:
   - git submodule init tools/boost_install
   - git submodule init libs/headers
   - git submodule init libs/config
-  - git submodule init libs/parameter_python
   - git submodule update --jobs %GIT_FETCH_JOBS%
   - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\parameter
   - python tools/boostdep/depinst/depinst.py --git_args "--jobs %GIT_FETCH_JOBS%" parameter
   - cmd /c bootstrap
-  - b2 headers
+  - b2 -d0 headers
 
 build: off
 
 test_script:
+  - if not "%ENV_SCRIPT%" == "" call "%ENV_SCRIPT%"
   - b2 -j %NUMBER_OF_PROCESSORS% libs/parameter/test %ARGS%

build.jam

@@ -0,0 +1,32 @@
+# 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/core//boost_core
+    /boost/function//boost_function
+    /boost/fusion//boost_fusion
+    /boost/mp11//boost_mp11
+    /boost/mpl//boost_mpl
+    /boost/optional//boost_optional
+    /boost/preprocessor//boost_preprocessor
+    /boost/type_traits//boost_type_traits
+    /boost/utility//boost_utility ;
+
+project /boost/parameter
+    : common-requirements
+        <include>include
+    ;
+
+explicit
+    [ alias boost_parameter : : : : <library>$(boost_dependencies) ]
+    [ alias all : boost_parameter test ]
+    ;
+
+call-if : boost-library parameter
+    ;
+

config/Jamfile.v2

@@ -0,0 +1,8 @@
+# Copyright Andrey Semashev 2025.
+#
+# 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)
+
+exe graph_supported : graph_supported.cpp : <library>/boost/graph//boost_graph ;
+explicit graph_supported ;

config/graph_supported.cpp

@@ -0,0 +1,18 @@
+/*
+ *             Copyright Andrey Semashev 2025.
+ * Distributed under the Boost Software License, Version 1.0.
+ *    (See accompanying file LICENSE_1_0.txt or copy at
+ *          http://www.boost.org/LICENSE_1_0.txt)
+ */
+
+// This test checks whether the portion of Boost.Graph that is used by Boost.Parameter tests
+// is compatible with the current compiler. The headers listed below are used in Boost.Parameter tests.
+
+#include <boost/graph/graph_traits.hpp>
+#include <boost/graph/properties.hpp>
+#include <boost/graph/depth_first_search.hpp>
+#include <boost/graph/adjacency_list.hpp>
+
+int main()
+{
+}

doc/html/index.html

@@ -98,8 +98,6 @@ int x =
 </tr>
 <tr class="field"><th class="field-name">organization:</th><td class="field-body"><a class="reference external" href="http://www.boostpro.com">BoostPro Computing</a></td>
 </tr>
-<tr class="field"><th class="field-name">date:</th><td class="field-body">$Date: 2005/07/17 19:53:01 $</td>
-</tr>
 <tr class="field"><th class="field-name">copyright:</th><td class="field-body">Copyright David Abrahams, Daniel Wallin
 2005-2009. Distributed under the Boost Software License,
 Version 1.0. (See accompanying file LICENSE_1_0.txt

doc/index.rst

@@ -90,7 +90,6 @@ parameters whose identity can be deduced from their types.
 :Authors:       David Abrahams, Daniel Wallin
 :Contact:       dave@boost-consulting.com, daniel@boostpro.com
 :organization:  `BoostPro Computing`_
-:date:          $Date: 2005/07/17 19:53:01 $
 
 :copyright:     Copyright David Abrahams, Daniel Wallin
                 2005-2009. Distributed under the Boost Software License,

doc/reference.rst

@@ -5,7 +5,6 @@ The Boost Parameter Library Reference Documentation
 :Authors:       David Abrahams, Daniel Wallin
 :Contact:       dave@boost-consulting.com, daniel@boostpro.com
 :organization:  `BoostPro Computing`_
-:date:          $Date: 2005/07/17 19:53:01 $
 
 :copyright:     Copyright David Abrahams, Daniel Wallin
                 2005-2009.  Distributed under the Boost Software License,

include/boost/parameter/aux_/pack/tag_keyword_arg_ref.hpp

@@ -10,7 +10,7 @@
 #include <boost/parameter/aux_/tagged_argument.hpp>
 #include <boost/parameter/config.hpp>
 
-namespace boost { namespace parameter { namespace aux { 
+namespace boost { namespace parameter { namespace aux {
 
     template <
         typename Keyword
@@ -34,7 +34,7 @@ namespace boost { namespace parameter { namespace aux {
 
 #include <boost/mpl/bool.hpp>
 
-namespace boost { namespace parameter { namespace aux { 
+namespace boost { namespace parameter { namespace aux {
 
     template <typename Keyword, typename ActualArg>
     struct tag_ref<Keyword,ActualArg,::boost::mpl::false_>

include/boost/parameter/aux_/pack/unmatched_argument.hpp

@@ -34,7 +34,7 @@ namespace boost { namespace parameter { namespace aux {
         ));
 #endif
         typedef int type;
-    }; 
+    };
 }}} // namespace boost::parameter::aux
 
 #endif  // include guard

include/boost/parameter/aux_/preprocessor/overloads.hpp

@@ -51,7 +51,7 @@
     ::boost::parameter::aux::item< \
         BOOST_PP_CAT(PS, n), BOOST_PP_CAT(A, n)
 
-#define BOOST_PARAMETER_close_list(z, n, text) > 
+#define BOOST_PARAMETER_close_list(z, n, text) >
 
 #define BOOST_PARAMETER_arg_list(n) \
     ::boost::parameter::aux::make_arg_list< \

include/boost/parameter/aux_/tag.hpp

@@ -19,7 +19,7 @@
 #include <boost/mp11/utility.hpp>
 #include <type_traits>
 
-namespace boost { namespace parameter { namespace aux { 
+namespace boost { namespace parameter { namespace aux {
 
     template <typename Keyword, typename Arg>
     struct tag_if_lvalue_reference
@@ -75,7 +75,7 @@ namespace boost { namespace parameter { namespace aux {
 #include <boost/type_traits/is_lvalue_reference.hpp>
 #include <boost/type_traits/remove_const.hpp>
 
-namespace boost { namespace parameter { namespace aux { 
+namespace boost { namespace parameter { namespace aux {
 
     template <typename Keyword, typename ActualArg>
     struct tag
@@ -119,7 +119,7 @@ namespace boost { namespace parameter { namespace aux {
 
 #else   // !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
 
-namespace boost { namespace parameter { namespace aux { 
+namespace boost { namespace parameter { namespace aux {
 
     template <
         typename Keyword
@@ -142,7 +142,7 @@ namespace boost { namespace parameter { namespace aux {
 #include <boost/mpl/bool.hpp>
 #include <boost/type_traits/remove_reference.hpp>
 
-namespace boost { namespace parameter { namespace aux { 
+namespace boost { namespace parameter { namespace aux {
 
     template <typename Keyword, typename Arg>
     struct tag<Keyword,Arg,::boost::mpl::false_>

include/boost/parameter/aux_/unwrap_cv_reference.hpp

@@ -121,7 +121,7 @@ namespace boost { namespace parameter { namespace aux {
         typedef boost::mpl::bool_<
 #if BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x564))
             is_cv_reference_wrapper::
-#endif 
+#endif
         value> type;
     };
 

include/boost/parameter/aux_/void.hpp

@@ -6,7 +6,7 @@
 #ifndef BOOST_PARAMETER_VOID_050329_HPP
 #define BOOST_PARAMETER_VOID_050329_HPP
 
-namespace boost { namespace parameter { 
+namespace boost { namespace parameter {
 
     // A placemarker for "no argument passed."
     // MAINTAINER NOTE: Do not make this into a metafunction

include/boost/parameter/binding.hpp

@@ -24,7 +24,7 @@
 #include <boost/type_traits/is_same.hpp>
 #endif
 
-namespace boost { namespace parameter { 
+namespace boost { namespace parameter {
 
     // A metafunction that, given an argument pack, returns the reference type
     // of the parameter identified by the given keyword.  If no such parameter
@@ -100,7 +100,7 @@ namespace boost { namespace parameter {
 
 #include <boost/parameter/aux_/is_placeholder.hpp>
 
-namespace boost { namespace parameter { 
+namespace boost { namespace parameter {
 
     template <
         typename Parameters
@@ -132,7 +132,7 @@ namespace boost { namespace parameter {
 
 #include <boost/parameter/aux_/result_of0.hpp>
 
-namespace boost { namespace parameter { 
+namespace boost { namespace parameter {
 
     // A metafunction that, given an argument pack, returns the reference type
     // of the parameter identified by the given keyword.  If no such parameter

include/boost/parameter/match.hpp

@@ -26,7 +26,7 @@
 /**/
 #else
 #define BOOST_PARAMETER_MATCH_DEFAULTS(ArgTypes)
-#endif 
+#endif
 
 #include <boost/parameter/aux_/preprocessor/seq_enum.hpp>
 

include/boost/parameter/template_keyword.hpp

@@ -24,7 +24,7 @@
 #include <boost/type_traits/is_array.hpp>
 #endif
 
-namespace boost { namespace parameter { 
+namespace boost { namespace parameter {
 
     template <typename Tag, typename T>
     struct template_keyword : ::boost::parameter::aux::template_keyword_base

include/boost/parameter/value_type.hpp

@@ -24,7 +24,7 @@
 #include <boost/type_traits/is_same.hpp>
 #endif
 
-namespace boost { namespace parameter { 
+namespace boost { namespace parameter {
 
     // A metafunction that, given an argument pack, returns the value type
     // of the parameter identified by the given keyword.  If no such parameter
@@ -100,7 +100,7 @@ namespace boost { namespace parameter {
 
 #include <boost/parameter/aux_/is_placeholder.hpp>
 
-namespace boost { namespace parameter { 
+namespace boost { namespace parameter {
 
     template <
         typename Parameters
@@ -132,7 +132,7 @@ namespace boost { namespace parameter {
 
 #include <boost/parameter/aux_/result_of0.hpp>
 
-namespace boost { namespace parameter { 
+namespace boost { namespace parameter {
 
     // A metafunction that, given an argument pack, returns the value type
     // of the parameter identified by the given keyword.  If no such parameter

test/CMakeLists.txt

@@ -5,6 +5,8 @@
 # NOTE: CMake support for Boost.Parameter is currently experimental at best
 #       and the interface is likely to change in the future
 
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+
 # TODO: Also process literate tests
 file(GLOB test_files *.cpp)
 
@@ -12,7 +14,7 @@ file(GLOB test_files *.cpp)
 # special requirements
 # TODO: enable more tests
 list(FILTER test_files EXCLUDE REGEX
-    efficiency|deduced_unmatched_arg|python_test|duplicates)
+    efficiency|deduced_unmatched_arg|duplicates)
 
 # Attach all our tests to the `tests` target, to enable
 # `cmake --build . --target tests`

test/Jamfile.v2

@@ -1,5 +1,7 @@
 # Copyright David Abrahams, Daniel Wallin 2006.
 # Copyright Cromwell D. Enage 2017.
+# Copyright Andrey Semashev 2025.
+#
 # 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)
@@ -9,14 +11,14 @@
 import os ;
 import testing ;
 
-project boost/parameter
+project
     :
-        default-build
+        requirements
+        <library>/boost/parameter//boost_parameter
         <warnings>off
+        <include>.
     ;
 
-import python ;
-
 alias parameter_standard_tests
     :
     [ run maybe.cpp : : : : : <preserve-target-tests>off ]
@@ -425,6 +427,8 @@ alias parameter_literate_tests
         :
         :
         :
+            [ check-target-builds ../config//graph_supported "Boost.Graph compiles" : <library>/boost/graph//boost_graph : <build>no ]
+
             <define>BOOST_PARAMETER_MAX_ARITY=5
             <define>BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY=6
         :
@@ -493,76 +497,6 @@ alias parameter_literate_tests
     ]
     ;
 
-if ! [ os.environ BOOST_PARAMETER_TEST_WITHOUT_PYTHON_TESTS ]
-{
-    alias parameter_python_test
-        :
-        :
-            # Python fails for clang on linux with cxxstd set to 14
-            <target-os>linux
-            <toolset>clang
-            <cxxstd>14
-        ;
-
-    alias parameter_python_test
-        :
-        :
-            # Python fails for clang on linux with cxxstd set to 1z
-            <target-os>linux
-            <toolset>clang
-            <cxxstd>1z
-        ;
-
-    alias parameter_python_test
-        :
-        :
-            # Python fails for xcode 8.3.0 on osx
-            # so we turn off this test for this compiler completely for now
-            <target-os>darwin
-            # TODO: Differentiate by xcode version or by clang version
-        ;
-
-    alias parameter_python_test
-        :
-        :
-            # Python fails for mingw compilers with cxxstd set to 11 or higher
-            # because of a Python header problem
-            # so we turn off this test for this compiler completely
-            <target-os>windows
-            <toolset>gcc
-            <address-model>32
-        ;
-
-    alias parameter_python_test
-        :
-        :
-            # Python fails for clang-linux compilers with cxxstd set to 11 or higher
-            # because of a Python header problem
-            # so we turn off this test for this compiler completely
-            <target-os>windows
-            <toolset>clang-linux
-            <address-model>32
-        ;
-
-    alias parameter_python_test
-        :
-        :
-            # Python fails for windows compilers with 64-bit addressing set
-            # because of a Python header problem
-            <target-os>windows
-            <address-model>64
-        ;
-
-    alias parameter_python_test
-        :
-        [ bpl-test python_test ]
-        ;
-}
-else
-{
-    alias parameter_python_test ;
-}
-
 alias parameter_macros_eval_category
     :
     :
@@ -950,6 +884,5 @@ test-suite "parameter"
         parameter_preprocessor_eval_cat_fail
         parameter_standard_tests
         parameter_literate_tests
-        parameter_python_test
         parameter_vendor_specific_fail_tests
     ;

test/earwicker.cpp

@@ -91,14 +91,14 @@ namespace test {
     BOOST_PARAMETER_FUN(int, f, 1, 4, f_parameters)
 #else
     BOOST_PARAMETER_FUN(void, f, 1, 4, f_parameters)
-#endif 
+#endif
     {
         BOOST_TEST_EQ(p[test::_w][0], p[test::_x | -1]);
         BOOST_TEST_EQ(p[test::_w][1], p[test::_y | -2]);
         BOOST_TEST_EQ(p[test::_w][2], p[test::_z | -3]);
 #if defined(BOOST_NO_VOID_RETURNS)
         return 0;
-#endif 
+#endif
     }
 } // namespace test
 

test/efficiency.cpp

@@ -5,8 +5,8 @@
 
 #include <boost/parameter/name.hpp>
 #include <boost/config/workaround.hpp>
-#include <boost/timer.hpp>
 #include <iostream>
+#include "timer.hpp"
 
 namespace test {
 
@@ -40,7 +40,7 @@ namespace test {
     //      or other processes and even device hardware interrupts may
     //      interfere by causing caches to be flushed.
 
-    // Accumulator function object with plain C++ interface 
+    // Accumulator function object with plain C++ interface
     template <typename T>
     struct plain_weight_running_total
     {
@@ -147,7 +147,7 @@ namespace test {
         test::hammer<Accumulator>(x, repeats);
 
         // Now start a timer.
-        boost::timer time;
+        test::timer time;
         test::hammer<Accumulator>(x, repeats);  // This time, we'll measure.
         return time.elapsed();
     }
@@ -163,7 +163,7 @@ int main()
     {
         repeats *= 10;
 
-        boost::timer time;
+        test::timer time;
 
         test::hammer<test::plain_weight_running_total<double> >(.1, repeats);
         test::hammer<test::named_param_weight_running_total<double> >(
@@ -172,7 +172,7 @@ int main()
 
         measured = time.elapsed();
     }
-    
+
     std::cout
         << "plain time:           "
         << test::measure<test::plain_weight_running_total<double> >(

test/literate/default-expression-evaluation0.cpp

@@ -8,8 +8,6 @@ BOOST_PARAMETER_NAME(root_vertex)
 BOOST_PARAMETER_NAME(index_map)
 BOOST_PARAMETER_NAME(color_map)
 
-#include <boost/graph/depth_first_search.hpp> // for dfs_visitor
-
 BOOST_PARAMETER_FUNCTION((bool), depth_first_search, tag,
     (required
         (graph, *)

test/preprocessor_deduced.cpp

@@ -99,7 +99,7 @@ namespace test {
         return 1;
     }
 
-    struct X 
+    struct X
     {
         X(int x_ = -1) : x(x_)
         {

test/python_test.cpp

@@ -1,172 +0,0 @@
-// Copyright Daniel Wallin 2006. Use, modification and distribution is
-// 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)
-
-#include <math.h>
-#include <boost/python.hpp>
-#include <boost/parameter/preprocessor.hpp>
-#include <boost/parameter/keyword.hpp>
-#include <boost/parameter/python.hpp>
-#include <boost/utility/enable_if.hpp>
-
-namespace test {
-
-BOOST_PARAMETER_KEYWORD(tags, x)
-BOOST_PARAMETER_KEYWORD(tags, y)
-BOOST_PARAMETER_KEYWORD(tags, z)
-
-struct Xbase
-{
-    // We need the disable_if part for VC7.1/8.0.
-    template <class Args>
-    Xbase(
-        Args const& args
-      , typename boost::disable_if<
-            boost::is_base_and_derived<Xbase, Args>
-        >::type* = 0
-    )
-      : value(std::string(args[x | "foo"]) + args[y | "bar"])
-    {}
-
-    std::string value;
-};
-
-struct X : Xbase
-{
-    BOOST_PARAMETER_CONSTRUCTOR(X, (Xbase), tags,
-        (optional
-         (x, *)
-         (y, *)
-        )
-    )
-
-    BOOST_PARAMETER_BASIC_MEMBER_FUNCTION((int), f, tags,
-        (required
-         (x, *)
-         (y, *)
-        )
-        (optional
-         (z, *)
-        )
-    )
-    {
-        return args[x] + args[y] + args[z | 0];
-    }
-
-    BOOST_PARAMETER_BASIC_MEMBER_FUNCTION((std::string), g, tags,
-        (optional
-         (x, *)
-         (y, *)
-        )
-    )
-    {
-        return std::string(args[x | "foo"]) + args[y | "bar"];
-    }
-
-    BOOST_PARAMETER_MEMBER_FUNCTION((X&), h, tags,
-        (optional (x, *, "") (y, *, ""))
-    )
-    {
-        return *this;
-    }
-
-    template <class A0>
-    X& operator()(A0 const& a0)
-    {
-        return *this;
-    }
-};
-
-} // namespace test
-
-struct f_fwd
-{
-    template <class R, class T, class A0, class A1, class A2>
-    R operator()(boost::type<R>, T& self, A0 const& a0, A1 const& a1, A2 const& a2)
-    {
-        return self.f(a0,a1,a2);
-    }
-};
-
-struct g_fwd
-{
-    template <class R, class T, class A0, class A1>
-    R operator()(boost::type<R>, T& self, A0 const& a0, A1 const& a1)
-    {
-        return self.g(a0,a1);
-    }
-};
-
-struct h_fwd
-{
-    template <class R, class T>
-    R operator()(boost::type<R>, T& self)
-    {
-        return self.h();
-    }
-
-    template <class R, class T, class A0>
-    R operator()(boost::type<R>, T& self, A0 const& a0)
-    {
-        return self.h(a0);
-    }
-
-    template <class R, class T, class A0, class A1>
-    R operator()(boost::type<R>, T& self, A0 const& a0, A1 const& a1)
-    {
-        return self.h(a0,a1);
-    }
-};
-
-BOOST_PYTHON_MODULE(python_test_ext)
-{
-    namespace mpl = boost::mpl;
-    using namespace test;
-    using namespace boost::python;
-
-    class_<X>("X")
-        .def(
-            boost::parameter::python::init<
-                mpl::vector<
-                    tags::x*(std::string), tags::y*(std::string)
-                >
-            >()
-        )
-        .def(
-            "f"
-          , boost::parameter::python::function<
-                f_fwd
-              , mpl::vector<
-                    int, tags::x(int), tags::y(int), tags::z*(int)
-                >
-            >()
-        )
-        .def(
-            "g"
-          , boost::parameter::python::function<
-                g_fwd
-              , mpl::vector<
-                    std::string, tags::x*(std::string), tags::y*(std::string)
-                >
-            >()
-        )
-        .def(
-            "h"
-          , boost::parameter::python::function<
-                h_fwd
-              , mpl::vector<
-                    X&, tags::x**(std::string), tags::y**(std::string)
-                >
-            >()
-          , return_arg<>()
-        )
-        .def(
-            boost::parameter::python::call<
-                mpl::vector<
-                    X&, tags::x(int)
-                >
-            >() [ return_arg<>() ]
-        )
-        .def_readonly("value", &X::value);
-}
-

test/python_test.py

@@ -1,41 +0,0 @@
-# Copyright Daniel Wallin 2006. 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)
-
-'''
->>> from python_test_ext import X
->>> x = X(y = 'baz')
->>> x.value
-'foobaz'
->>> x.f(1,2)
-3
->>> x.f(1,2,3)
-6
->>> x.f(1,2, z = 3)
-6
->>> x.f(z = 3, y = 2, x = 1)
-6
->>> x.g()
-'foobar'
->>> x.g(y = "baz")
-'foobaz'
->>> x.g(x = "baz")
-'bazbar'
->>> x.g(y = "foo", x = "bar")
-'barfoo'
->>> y = x.h(x = "bar", y = "foo")
->>> assert x == y
->>> y = x(0)
->>> assert x == y
-'''
-
-def run(args = None):
-    if args is not None:
-        import sys
-        sys.argv = args
-    import doctest, python_test 
-    return doctest.testmod(python_test)
-
-if __name__ == '__main__':
-    import sys
-    sys.exit(run()[0])

test/timer.hpp

@@ -0,0 +1,59 @@
+//  Copyright Andrey Semashev 2023.
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+
+//  This file is a copy of boost/timer.hpp from Boost.Timer v1, which
+//  was deprecated and slated for removal. We are not using Boost.Timer v2
+//  components to avoid having to link with its binary.
+//
+//  See http://www.boost.org/libs/timer for documentation.
+
+#ifndef BOOST_PARAMETER_TEST_TIMER_HPP
+#define BOOST_PARAMETER_TEST_TIMER_HPP
+
+#include <ctime>
+#include <limits>
+
+namespace test {
+
+//  timer  -------------------------------------------------------------------//
+
+//  A timer object measures elapsed time.
+
+//  It is recommended that implementations measure wall clock rather than CPU
+//  time since the intended use is performance measurement on systems where
+//  total elapsed time is more important than just process or CPU time.
+
+//  Warnings: The maximum measurable elapsed time may well be only 596.5+ hours
+//  due to implementation limitations.  The accuracy of timings depends on the
+//  accuracy of timing information provided by the underlying platform, and
+//  this varies a great deal from platform to platform.
+
+class timer
+{
+ public:
+  timer() { _start_time = std::clock(); } // postcondition: elapsed()==0
+  void restart() { _start_time = std::clock(); } // post: elapsed()==0
+  double elapsed() const                  // return elapsed time in seconds
+    { return  double(std::clock() - _start_time) / CLOCKS_PER_SEC; }
+
+  double elapsed_max() const   // return estimated maximum value for elapsed()
+  // Portability warning: elapsed_max() may return too high a value on systems
+  // where std::clock_t overflows or resets at surprising values.
+  {
+    return (double((std::numeric_limits<std::clock_t>::max)())
+       - double(_start_time)) / double(CLOCKS_PER_SEC);
+  }
+
+  double elapsed_min() const            // return minimum value for elapsed()
+   { return double(1)/double(CLOCKS_PER_SEC); }
+
+ private:
+  std::clock_t _start_time;
+}; // timer
+
+} // namespace test
+
+#endif  // BOOST_PARAMETER_TEST_TIMER_HPP