Add C++23 feature test macro support.

Add C++23 header macros.

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        compiler: [ g++-11, g++-12, g++-13 ]
+        compiler: [ g++-11, g++-12, clang++-14 ]
     steps:
       - uses: actions/checkout@v3
         with:
@@ -34,7 +34,7 @@ jobs:
       - name: Add repository
         run: sudo apt-add-repository -y "ppa:ubuntu-toolchain-r/test"
       - name: Install packages
-        run: sudo apt install g++-11 g++-12 g++-13
+        run: sudo apt install g++-11 g++-12 clang-14
       - name: Checkout main boost
         run: git clone -b develop --depth 1 https://github.com/boostorg/boost.git ../boost-root
       - name: Update Dependencies
@@ -63,7 +63,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        compiler: [ clang++-15 ]
+        compiler: [ clang++-11, clang++-12, clang++-13 ]
     steps:
       - uses: actions/checkout@v3
         with:
@@ -78,7 +78,7 @@ jobs:
       - name: Add repository
         run: sudo apt-add-repository -y "ppa:ubuntu-toolchain-r/test"
       - name: Install packages
-        run: sudo apt install clang-15
+        run: sudo apt install clang-11 clang-12 clang-13
       - name: Checkout main boost
         run: git clone -b develop --depth 1 https://github.com/boostorg/boost.git ../boost-root
       - name: Update Dependencies
@@ -146,50 +146,6 @@ jobs:
       - name: Test
         run: ../../../b2 toolset=$TOOLSET cxxstd=03,11,14,17,2a
         working-directory: ../boost-root/libs/config/test
-  ubuntu-focal-clang:
-    runs-on: ubuntu-20.04
-    strategy:
-      fail-fast: false
-      matrix:
-        compiler: [ clang++-11, clang++-12 ]
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: '0'
-      - uses: mstachniuk/ci-skip@v1
-        with:
-          commit-filter: '[skip ci];[ci skip];[CI SKIP];[SKIP CI];***CI SKIP***;***SKIP CI***;[windows];[Windows];[WINDOWS];[apple];[Apple];[APPLE]'
-          commit-filter-separator: ';'
-          fail-fast: true
-      - name: Set TOOLSET
-        run: echo ${{ matrix.compiler }} | awk '/^g/ { print "TOOLSET=gcc" } /^clang/ { print "TOOLSET=clang" }' >> $GITHUB_ENV
-      - name: Add repository
-        run: sudo apt-add-repository -y "ppa:ubuntu-toolchain-r/test"
-      - name: Install packages
-        run: sudo apt install clang-11 clang-12
-      - name: Checkout main boost
-        run: git clone -b develop --depth 1 https://github.com/boostorg/boost.git ../boost-root
-      - name: Update Dependencies
-        run: git submodule update --init tools/build tools/boost_install libs/headers libs/detail libs/core libs/assert libs/type_traits
-        working-directory: ../boost-root
-      - name: Copy files
-        run: cp -r $GITHUB_WORKSPACE/* libs/config
-        working-directory: ../boost-root
-      - name: Bootstrap
-        run: ./bootstrap.sh
-        working-directory: ../boost-root
-      - name: Generate headers
-        run: ./b2 headers
-        working-directory: ../boost-root
-      - name: Generate user config
-        run: 'echo "using $TOOLSET : : ${{ matrix.compiler }} ;" > ~/user-config.jam'
-        working-directory: ../boost-root
-      - name: Config info
-        run: ../../../b2 print_config_info toolset=$TOOLSET cxxstd=03,11,14,17,2a
-        working-directory: ../boost-root/libs/config/test
-      - name: Test
-        run: ../../../b2 toolset=$TOOLSET cxxstd=03,11,14,17,2a
-        working-directory: ../boost-root/libs/config/test
   macos_11:
     runs-on: macos-11
     strategy:
@@ -293,10 +249,10 @@ jobs:
         run: b2 headers
         working-directory: ../boost-root
       - name: Config info
-        run: ..\..\..\b2 print_config_info cxxstd=14,latest address-model=64 toolset=msvc-14.0
+        run: ..\..\..\b2 print_config_info cxxstd=14,17 address-model=64 toolset=msvc-14.0
         working-directory: ../boost-root/libs/config/test
       - name: Test
-        run: ..\..\..\b2 --hash address-model=64 cxxstd=14,latest toolset=msvc-14.0
+        run: ..\..\..\b2 --hash address-model=64 cxxstd=14,17 toolset=msvc-14.0
         working-directory: ../boost-root/libs/config/test
   windows_msvc_14_2:
     runs-on: windows-2019
@@ -331,10 +287,10 @@ jobs:
         run: b2 headers
         working-directory: ../boost-root
       - name: Config info
-        run: ..\..\..\b2 print_config_info cxxstd=14,17,20,latest address-model=64 toolset=msvc-14.2
+        run: ..\..\..\b2 print_config_info cxxstd=14,17,latest address-model=64 toolset=msvc-14.2
         working-directory: ../boost-root/libs/config/test
       - name: Test
-        run: ..\..\..\b2 --hash address-model=64 cxxstd=14,17,20,latest toolset=msvc-14.2
+        run: ..\..\..\b2 --hash address-model=64 cxxstd=14,17,latest toolset=msvc-14.2
         working-directory: ../boost-root/libs/config/test
   windows_msvc_14_3:
     runs-on: windows-2022
@@ -369,7 +325,7 @@ jobs:
         run: b2 headers
         working-directory: ../boost-root
       - name: Config info
-        run: ..\..\..\b2 print_config_info cxxstd=14,17,20,latest address-model=64 toolset=msvc-14.3
+        run: ..\..\..\b2 print_config_info cxxstd=14,17,latest address-model=64 toolset=msvc-14.3
         working-directory: ../boost-root/libs/config/test
       - name: Test
         run: ..\..\..\b2 --hash address-model=64 cxxstd=14,17,20,latest toolset=msvc-14.3

include/boost/config/compiler/clang_version.hpp

@@ -2,7 +2,7 @@
 // Distributed under the Boost Software License, Version 1.0.
 // https://www.boost.org/LICENSE_1_0.txt)
 
-#if !defined(__apple_build_version__)
+#if !defined(__APPLE__)
 
 # define BOOST_CLANG_VERSION (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__ % 100)
 
@@ -11,13 +11,7 @@
 
 // https://en.wikipedia.org/wiki/Xcode#Toolchain_versions
 
-# if BOOST_CLANG_REPORTED_VERSION >= 150000
-#   define BOOST_CLANG_VERSION 160000
-
-# elif BOOST_CLANG_REPORTED_VERSION >= 140003
-#   define BOOST_CLANG_VERSION 150000
-
-# elif BOOST_CLANG_REPORTED_VERSION >= 140000
+# if BOOST_CLANG_REPORTED_VERSION >= 140000
 #   define BOOST_CLANG_VERSION 140000
 
 # elif BOOST_CLANG_REPORTED_VERSION >= 130100