Check __cpp_aligned_new in test/helpers/pmr.hpp before using std::align_val_t

Add clang-19, clang-20, macos-26 to ci.yml. Replace macos-13 with macos-latest.
updated package-lock.json (#328 )
2026-08-04 04:34:12 +02:00 · 2026-01-01 19:25:00 +02:00 · 2026-01-01 15:20:55 +02:00 · 2025-10-21 20:47:01 +02:00 · 2025-10-20 09:04:57 +02:00 · 2025-10-19 17:02:32 +02:00
532 changed files with 38386 additions and 8555 deletions
@@ -31,171 +31,66 @@ environment:
    B2_VARIANT: debug,release

  matrix:
-    - FLAVOR: Visual Studio 2008, 2010, 2012
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-      B2_TOOLSET: msvc-9.0,msvc-10.0,msvc-11.0
-      B2_ADDRESS_MODEL: 32 # No 64bit support
-
-    - FLAVOR: Visual Studio 2013, 2015
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-      B2_TOOLSET: msvc-12.0,msvc-14.0
-
-    - FLAVOR: Visual Studio 2017, C++14
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      B2_CXXSTD: 14
-      B2_TOOLSET: msvc-14.1
-
-    - FLAVOR: Visual Studio 2017, C++17
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      B2_CXXSTD: 17
-      B2_TOOLSET: msvc-14.1
-
-    - FLAVOR: Visual Studio 2017, C++latest
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      B2_CXXSTD: latest
-      B2_TOOLSET: msvc-14.1
-
-    - FLAVOR: cygwin (32-bit, C++03,11)
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      ADDPATH: C:\cygwin\bin;
-      B2_ADDRESS_MODEL: 32
-      B2_CXXSTD: 03,11
-      B2_TOOLSET: gcc
-
-    - FLAVOR: cygwin (32-bit, C++14,1z)
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      ADDPATH: C:\cygwin\bin;
-      B2_ADDRESS_MODEL: 32
-      B2_CXXSTD: 14,1z
-      B2_TOOLSET: gcc
-
-    - FLAVOR: cygwin (64-bit, C++03,11)
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      ADDPATH: C:\cygwin64\bin;
-      B2_ADDRESS_MODEL: 64
-      B2_CXXSTD: 03,11
-      B2_TOOLSET: gcc
-
-    - FLAVOR: cygwin (64-bit, C++14,1z)
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      ADDPATH: C:\cygwin64\bin;
-      B2_ADDRESS_MODEL: 64
-      B2_CXXSTD: 14,1z
-      B2_TOOLSET: gcc
-
-    - FLAVOR: cygwin (64-bit, latest, C++03)
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2022
-      ADDPATH: C:\cygwin64\bin;
-      B2_ADDRESS_MODEL: 64
-      B2_CXXSTD: 03
-      B2_TOOLSET: gcc
-      B2_FLAGS: "include=libs/unordered/test/unordered include=libs/unordered/test/exception"
-      B2_VARIANT: release
-
-    - FLAVOR: cygwin (64-bit, latest, C++11)
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2022
-      ADDPATH: C:\cygwin64\bin;
-      B2_ADDRESS_MODEL: 64
-      B2_CXXSTD: 11
-      B2_TOOLSET: gcc
-      B2_FLAGS: "include=libs/unordered/test/unordered include=libs/unordered/test/exception"
-      B2_VARIANT: release
-
-    - FLAVOR: cygwin (64-bit, latest, C++14)
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2022
-      ADDPATH: C:\cygwin64\bin;
-      B2_ADDRESS_MODEL: 64
-      B2_CXXSTD: 14
-      B2_TOOLSET: gcc
-      B2_FLAGS: "include=libs/unordered/test/unordered include=libs/unordered/test/exception"
-      B2_VARIANT: release
-
-    - FLAVOR: cygwin (64-bit, latest, C++1z)
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2022
-      ADDPATH: C:\cygwin64\bin;
-      B2_ADDRESS_MODEL: 64
-      B2_CXXSTD: 1z
-      B2_TOOLSET: gcc
-      B2_FLAGS: "include=libs/unordered/test/unordered include=libs/unordered/test/exception"
-      B2_VARIANT: release
-
-    - FLAVOR: mingw-w64, 32 bit, C++03
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-      ADDPATH: C:\mingw-w64\i686-8.1.0-posix-dwarf-rt_v6-rev0\mingw32\bin;
-      B2_CXXSTD: 03
-      B2_TOOLSET: gcc
-      B2_ADDRESS_MODEL: 32
-
-    - FLAVOR: mingw-w64, 32 bit, C++11
+    - FLAVOR: MinGW-w64 (32 bit, C++11)
      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
      ADDPATH: C:\mingw-w64\i686-8.1.0-posix-dwarf-rt_v6-rev0\mingw32\bin;
+      B2_CXXFLAGS: -g0 # Reduce compiler's memory consumption
      B2_CXXSTD: 11
      B2_TOOLSET: gcc
      B2_ADDRESS_MODEL: 32

-    - FLAVOR: mingw-w64, 32 bit, C++14
+    - FLAVOR: MinGW-w64 (32 bit, C++14)
      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
      ADDPATH: C:\mingw-w64\i686-8.1.0-posix-dwarf-rt_v6-rev0\mingw32\bin;
+      B2_CXXFLAGS: -g0 # Reduce compiler's memory consumption
      B2_CXXSTD: 14
      B2_TOOLSET: gcc
      B2_ADDRESS_MODEL: 32

-    - FLAVOR: mingw-w64, 32 bit, C++17
+    - FLAVOR: MinGW-w64 (32 bit, C++17)
      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
      ADDPATH: C:\mingw-w64\i686-8.1.0-posix-dwarf-rt_v6-rev0\mingw32\bin;
+      B2_CXXFLAGS: -g0 # Reduce compiler's memory consumption
      B2_CXXSTD: 17
      B2_TOOLSET: gcc
      B2_ADDRESS_MODEL: 32

-    - FLAVOR: mingw-w64, 32 bit, C++2a
+    - FLAVOR: MinGW-w64 (32 bit, C++2a)
      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
      ADDPATH: C:\mingw-w64\i686-8.1.0-posix-dwarf-rt_v6-rev0\mingw32\bin;
+      B2_CXXFLAGS: -g0 # Reduce compiler's memory consumption
      B2_CXXSTD: 2a
      B2_TOOLSET: gcc
      B2_ADDRESS_MODEL: 32

-    - FLAVOR: mingw-w64, 64 bit, C++03
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-      ADDPATH: C:\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw64\bin;
-      B2_CXXSTD: 03
-      B2_TOOLSET: gcc
-      B2_ADDRESS_MODEL: 64
-
-    - FLAVOR: mingw-w64, 64 bit, C++11
+    - FLAVOR: MinGW-w64 (64 bit, C++11)
      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
      ADDPATH: C:\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw64\bin;
      B2_CXXSTD: 11
      B2_TOOLSET: gcc
      B2_ADDRESS_MODEL: 64

-    - FLAVOR: mingw-w64, 64 bit, C++14
+    - FLAVOR: MinGW-w64 (64 bit, C++14)
      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
      ADDPATH: C:\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw64\bin;
      B2_CXXSTD: 14
      B2_TOOLSET: gcc
      B2_ADDRESS_MODEL: 64

-    - FLAVOR: mingw-w64, 64 bit, C++17
+    - FLAVOR: MinGW-w64 (64 bit, C++17)
      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
      ADDPATH: C:\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw64\bin;
      B2_CXXSTD: 17
      B2_TOOLSET: gcc
      B2_ADDRESS_MODEL: 64

-    - FLAVOR: mingw-w64, 64 bit, C++2a
+    - FLAVOR: MinGW-w64 (64 bit, C++2a)
      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
      ADDPATH: C:\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw64\bin;
      B2_CXXSTD: 2a
      B2_TOOLSET: gcc
      B2_ADDRESS_MODEL: 64

-    #- FLAVOR: CodeCov (VS 2019)
-    #  APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    #  B2_CXXFLAGS: -permissive-
-    #  B2_CXXSTD: 14
-    #  B2_TOOLSET: msvc-14.2
-    #  COVERAGE: true
-
 install:
  - git clone --depth 1 https://github.com/boostorg/boost-ci.git C:\boost-ci-cloned
  # Copy ci folder if not testing Boost.CI
@@ -30,11 +30,13 @@ local linux_pipeline(name, image, environment, packages = "", sources = [], arch
            name: "everything",
            image: image,
            environment: environment,
+            privileged: true,
            commands:
            [
                'set -e',
+                'echo $DRONE_STAGE_MACHINE',
                'uname -a',
-                'wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -',
+                'curl -sSL --retry 5 https://apt.llvm.org/llvm-snapshot.gpg.key | sudo gpg --dearmor -o /etc/apt/trusted.gpg.d/llvm-snapshot.gpg',
            ] +
            (if sources != [] then [ ('apt-add-repository "' + source + '"') for source in sources ] else []) +
            (if packages != "" then [ 'apt-get update', 'apt-get -y install ' + packages ] else []) +
@@ -65,6 +67,8 @@ local macos_pipeline(name, environment, xcode_version = "12.2", osx_version = "c
            environment: environment + { "DEVELOPER_DIR": "/Applications/Xcode-" + xcode_version + ".app/Contents/Developer" },
            commands:
            [
+                'echo $DRONE_STAGE_MACHINE',
+                'sw_vers',
                'uname -a',
                'export LIBRARY=' + library,
                './.drone/drone.sh',
@@ -100,67 +104,43 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
 };

 [
-    linux_pipeline(
-        "Linux 14.04 GCC 4.4 32/64",
-        "cppalliance/droneubuntu1404:1",
-        { TOOLSET: 'gcc', COMPILER: 'g++-4.4', CXXSTD: '98,0x', ADDRMD: '32,64' },
-        "g++-4.4-multilib",
-        [ "ppa:ubuntu-toolchain-r/test" ],
-    ),
-
-    linux_pipeline(
-        "Linux 14.04 GCC 4.6 32/64",
-        "cppalliance/droneubuntu1404:1",
-        { TOOLSET: 'gcc', COMPILER: 'g++-4.6', CXXSTD: '98,0x', ADDRMD: '32,64' },
-        "g++-4.6-multilib",
-        [ "ppa:ubuntu-toolchain-r/test" ],
-    ),
-
-    linux_pipeline(
-        "Linux 14.04 GCC 4.7 32/64",
-        "cppalliance/droneubuntu1404:1",
-        { TOOLSET: 'gcc', COMPILER: 'g++-4.7', CXXSTD: '98,0x', ADDRMD: '32,64' },
-        "g++-4.7-multilib",
-        [ "ppa:ubuntu-toolchain-r/test" ],
-    ),
-
    linux_pipeline(
        "Linux 14.04 GCC 4.8* 32/64",
-        "cppalliance/droneubuntu1404:1",
-        { TOOLSET: 'gcc', COMPILER: 'g++', CXXSTD: '03,11', ADDRMD: '32,64' },
+        "cppalliance/droneubuntu1604:1",
+        { TOOLSET: 'gcc', COMPILER: 'g++-4.8', CXXSTD: '11', ADDRMD: '32,64' },
+        "g++-4.8-multilib",
    ),

    linux_pipeline(
        "Linux 14.04 GCC 4.9 32/64",
-        "cppalliance/droneubuntu1404:1",
-        { TOOLSET: 'gcc', COMPILER: 'g++-4.9', CXXSTD: '03,11', ADDRMD: '32,64' },
+        "cppalliance/droneubuntu1604:1",
+        { TOOLSET: 'gcc', COMPILER: 'g++-4.9', CXXSTD: '11', ADDRMD: '32,64' },
        "g++-4.9-multilib",
-        [ "ppa:ubuntu-toolchain-r/test" ],
    ),

    linux_pipeline(
        "Linux 16.04 GCC 5* 32/64",
        "cppalliance/droneubuntu1604:1",
-        { TOOLSET: 'gcc', COMPILER: 'g++', CXXSTD: '03,11,14', ADDRMD: '32,64' },
+        { TOOLSET: 'gcc', COMPILER: 'g++', CXXSTD: '11,14', ADDRMD: '32,64' },
    ),

    linux_pipeline(
        "Linux 18.04 GCC 6 32/64",
        "cppalliance/droneubuntu1804:1",
-        { TOOLSET: 'gcc', COMPILER: 'g++-6', CXXSTD: '03,11,14', ADDRMD: '32,64' },
+        { TOOLSET: 'gcc', COMPILER: 'g++-6', CXXSTD: '11,14', ADDRMD: '32,64' },
        "g++-6-multilib",
    ),

    linux_pipeline(
        "Linux 18.04 GCC 7* 32/64",
        "cppalliance/droneubuntu1804:1",
-        { TOOLSET: 'gcc', COMPILER: 'g++', CXXSTD: '03,11,14,17', ADDRMD: '32,64' },
+        { TOOLSET: 'gcc', COMPILER: 'g++', CXXSTD: '11,14,17', ADDRMD: '32,64' },
    ),

    linux_pipeline(
-        "Linux 18.04 GCC 8 32/64 (03,11)",
+        "Linux 18.04 GCC 8 32/64 (11)",
        "cppalliance/droneubuntu1804:1",
-        { TOOLSET: 'gcc', COMPILER: 'g++-8', CXXSTD: '03,11', ADDRMD: '32,64' },
+        { TOOLSET: 'gcc', COMPILER: 'g++-8', CXXSTD: '11', ADDRMD: '32,64' },
        "g++-8-multilib",
    ),

@@ -172,9 +152,9 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
    ),

    linux_pipeline(
-        "Linux 20.04 GCC 9* 32/64 (03,11,14)",
+        "Linux 20.04 GCC 9* 32/64 (11,14)",
        "cppalliance/droneubuntu2004:1",
-        { TOOLSET: 'gcc', COMPILER: 'g++', CXXSTD: '03,11,14', ADDRMD: '32,64' },
+        { TOOLSET: 'gcc', COMPILER: 'g++', CXXSTD: '11,14', ADDRMD: '32,64' },
    ),

    linux_pipeline(
@@ -186,14 +166,14 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
    linux_pipeline(
        "Linux 20.04 GCC 9* ARM64",
        "cppalliance/droneubuntu2004:multiarch",
-        { TOOLSET: 'gcc', COMPILER: 'g++', CXXSTD: '03,11,14,17,2a' },
+        { TOOLSET: 'gcc', COMPILER: 'g++', CXXSTD: '11,14,17,2a' },
        arch="arm64",
    ),

    linux_pipeline(
-        "Linux 20.04 GCC 9* S390x (03,11,14)",
+        "Linux 20.04 GCC 9* S390x (11,14)",
        "cppalliance/droneubuntu2004:multiarch",
-        { TOOLSET: 'gcc', COMPILER: 'g++', CXXSTD: '03,11,14' },
+        { TOOLSET: 'gcc', COMPILER: 'g++', CXXSTD: '11,14' },
        arch="s390x",
    ),

@@ -205,9 +185,9 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
    ),

    linux_pipeline(
-        "Linux 20.04 GCC 10 32/64 (03,11,14)",
+        "Linux 20.04 GCC 10 32/64 (11,14)",
        "cppalliance/droneubuntu2004:1",
-        { TOOLSET: 'gcc', COMPILER: 'g++-10', CXXSTD: '03,11,14', ADDRMD: '32,64' },
+        { TOOLSET: 'gcc', COMPILER: 'g++-10', CXXSTD: '11,14', ADDRMD: '32,64' },
        "g++-10-multilib",
    ),

@@ -219,9 +199,9 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
    ),

    linux_pipeline(
-        "Linux 22.04 GCC 11* 32/64 (03,11,14)",
+        "Linux 22.04 GCC 11* 32/64 (11,14)",
        "cppalliance/droneubuntu2204:1",
-        { TOOLSET: 'gcc', COMPILER: 'g++', CXXSTD: '03,11,14', ADDRMD: '32,64' },
+        { TOOLSET: 'gcc', COMPILER: 'g++', CXXSTD: '11,14', ADDRMD: '32,64' },
    ),

    linux_pipeline(
@@ -231,9 +211,9 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
    ),

    linux_pipeline(
-        "Linux 22.04 GCC 12 32 ASAN (03,11,14)",
+        "Linux 22.04 GCC 12 32 ASAN (11,14)",
        "cppalliance/droneubuntu2204:1",
-        { TOOLSET: 'gcc', COMPILER: 'g++-12', CXXSTD: '03,11', ADDRMD: '32' } + asan,
+        { TOOLSET: 'gcc', COMPILER: 'g++-12', CXXSTD: '11', ADDRMD: '32' } + asan,
        "g++-12-multilib",
    ),

@@ -266,9 +246,9 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
    ),

    linux_pipeline(
-        "Linux 22.04 GCC 12 64 ASAN (03,11,14)",
+        "Linux 22.04 GCC 12 64 ASAN (11,14)",
        "cppalliance/droneubuntu2204:1",
-        { TOOLSET: 'gcc', COMPILER: 'g++-12', CXXSTD: '03,11,14', ADDRMD: '64' } + asan,
+        { TOOLSET: 'gcc', COMPILER: 'g++-12', CXXSTD: '11,14', ADDRMD: '64' } + asan,
        "g++-12-multilib",
    ),

@@ -301,15 +281,15 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
    ),

    linux_pipeline(
-        "Linux 23.04 GCC 13 32/64 (03,11,14)",
-        "cppalliance/droneubuntu2304:1",
-        { TOOLSET: 'gcc', COMPILER: 'g++-13', CXXSTD: '03,11,14', ADDRMD: '32,64' },
+        "Linux 23.04 GCC 13 32/64 (11,14)",
+        "cppalliance/droneubuntu2404:1",
+        { TOOLSET: 'gcc', COMPILER: 'g++-13', CXXSTD: '11,14', ADDRMD: '32,64' },
        "g++-13 g++-13-multilib",
    ),

    linux_pipeline(
        "Linux 23.04 GCC 13 32/64 (17,20,2b)",
-        "cppalliance/droneubuntu2304:1",
+        "cppalliance/droneubuntu2404:1",
        { TOOLSET: 'gcc', COMPILER: 'g++-13', CXXSTD: '17,20,2b', ADDRMD: '32,64' },
        "g++-13 g++-13-multilib",
    ),
@@ -317,112 +297,112 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
    linux_pipeline(
        "Linux 16.04 Clang 3.5",
        "cppalliance/droneubuntu1604:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-3.5', CXXSTD: '03,11' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-3.5', CXXSTD: '11' },
        "clang-3.5",
    ),

    linux_pipeline(
        "Linux 16.04 Clang 3.6",
        "cppalliance/droneubuntu1604:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-3.6', CXXSTD: '03,11,14' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-3.6', CXXSTD: '11,14' },
        "clang-3.6",
    ),

    linux_pipeline(
        "Linux 16.04 Clang 3.7",
        "cppalliance/droneubuntu1604:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-3.7', CXXSTD: '03,11,14' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-3.7', CXXSTD: '11,14' },
        "clang-3.7",
    ),

    linux_pipeline(
        "Linux 16.04 Clang 3.8",
        "cppalliance/droneubuntu1604:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-3.8', CXXSTD: '03,11,14' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-3.8', CXXSTD: '11,14' },
        "clang-3.8",
    ),

    linux_pipeline(
        "Linux 18.04 Clang 3.9",
        "cppalliance/droneubuntu1804:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-3.9', CXXSTD: '03,11,14' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-3.9', CXXSTD: '11,14' },
        "clang-3.9",
    ),

    linux_pipeline(
        "Linux 18.04 Clang 4.0",
        "cppalliance/droneubuntu1804:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-4.0', CXXSTD: '03,11,14' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-4.0', CXXSTD: '11,14' },
        "clang-4.0",
    ),

    linux_pipeline(
        "Linux 18.04 Clang 5.0",
        "cppalliance/droneubuntu1804:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-5.0', CXXSTD: '03,11,14,1z' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-5.0', CXXSTD: '11,14,1z' },
        "clang-5.0",
    ),

    linux_pipeline(
        "Linux 18.04 Clang 6.0",
        "cppalliance/droneubuntu1804:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-6.0', CXXSTD: '03,11,14,17' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-6.0', CXXSTD: '11,14,17' },
        "clang-6.0",
    ),

    linux_pipeline(
        "Linux 20.04 Clang 7",
        "cppalliance/droneubuntu2004:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-7', CXXSTD: '03,11,14,17' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-7', CXXSTD: '11,14,17' },
        "clang-7",
    ),

    linux_pipeline(
        "Linux 20.04 Clang 8",
        "cppalliance/droneubuntu2004:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-8', CXXSTD: '03,11,14,17' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-8', CXXSTD: '11,14,17' },
        "clang-8",
    ),

    linux_pipeline(
        "Linux 20.04 Clang 9",
        "cppalliance/droneubuntu2004:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-9', CXXSTD: '03,11,14,17,2a' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-9', CXXSTD: '11,14,17,2a' },
        "clang-9",
    ),

    linux_pipeline(
        "Linux 20.04 Clang 10",
        "cppalliance/droneubuntu2004:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-10', CXXSTD: '03,11,14,17,2a' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-10', CXXSTD: '11,14,17,2a' },
        "clang-10",
    ),

    linux_pipeline(
        "Linux 20.04 Clang 11",
        "cppalliance/droneubuntu2004:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-11', CXXSTD: '03,11,14,17,2a' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-11', CXXSTD: '11,14,17,2a' },
        "clang-11",
    ),

    linux_pipeline(
        "Linux 20.04 Clang 12",
        "cppalliance/droneubuntu2004:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-12', CXXSTD: '03,11,14,17,2a' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-12', CXXSTD: '11,14,17,2a' },
        "clang-12",
    ),

    linux_pipeline(
        "Linux 22.04 Clang 13",
        "cppalliance/droneubuntu2204:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-13', CXXSTD: '03,11,14,17,20' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-13', CXXSTD: '11,14,17,20' },
        "clang-13",
    ),

    linux_pipeline(
-        "Linux 22.04 Clang 14 UBSAN (03,11,14)",
+        "Linux 22.04 Clang 14 UBSAN (11,14)",
        "cppalliance/droneubuntu2204:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-14', CXXSTD: '03,11,14' } + ubsan,
+        { TOOLSET: 'clang', COMPILER: 'clang++-14', CXXSTD: '11,14' } + ubsan,
        "clang-14",
    ),

@@ -434,9 +414,9 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
    ),

    linux_pipeline(
-        "Linux 22.04 Clang 14 ASAN (03,11,14)",
+        "Linux 22.04 Clang 14 ASAN (11,14)",
        "cppalliance/droneubuntu2204:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-14', CXXSTD: '03,11,14' } + asan,
+        { TOOLSET: 'clang', COMPILER: 'clang++-14', CXXSTD: '11,14' } + asan,
        "clang-14",
    ),

@@ -457,14 +437,14 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
    linux_pipeline(
        "Linux 22.04 Clang 15",
        "cppalliance/droneubuntu2204:1",
-        { TOOLSET: 'clang', COMPILER: 'clang++-15', CXXSTD: '03,11,14,17,20,2b' },
+        { TOOLSET: 'clang', COMPILER: 'clang++-15', CXXSTD: '11,14,17,20,2b' },
        "clang-15",
        ["deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-15 main"],
    ),

    macos_pipeline(
-        "MacOS 10.15 Xcode 12.2 UBSAN (03,11)",
-        { TOOLSET: 'clang', COMPILER: 'clang++', CXXSTD: '03,11' } + ubsan,
+        "MacOS 10.15 Xcode 12.2 UBSAN (11)",
+        { TOOLSET: 'clang', COMPILER: 'clang++', CXXSTD: '11' } + ubsan,
    ),

    macos_pipeline(
@@ -479,7 +459,7 @@ local windows_pipeline(name, image, environment, arch = "amd64") =

    macos_pipeline(
        "MacOS 12.4 Xcode 13.4.1 ASAN",
-        { TOOLSET: 'clang', COMPILER: 'clang++', CXXSTD: '03,11,14,1z' } + asan,
+        { TOOLSET: 'clang', COMPILER: 'clang++', CXXSTD: '11,14,1z' } + asan,
        xcode_version = "13.4.1", osx_version = "monterey", arch = "arm64",
    ),

@@ -492,13 +472,19 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
    windows_pipeline(
        "Windows VS2015 msvc-14.0",
        "cppalliance/dronevs2015",
-        { TOOLSET: 'msvc-14.0', CXXSTD: '14,latest' },
+        { TOOLSET: 'msvc-14.0', CXXSTD: '14,latest', 'B2_DONT_EMBED_MANIFEST': 1 },
    ),

    windows_pipeline(
        "Windows VS2017 msvc-14.1",
        "cppalliance/dronevs2017",
-        { TOOLSET: 'msvc-14.1', CXXSTD: '14,17,latest' },
+        { TOOLSET: 'msvc-14.1', CXXSTD: '14,17,latest', ADDRMD: '32,64' },
+    ),
+
+    windows_pipeline(
+        "Windows VS2017 msvc-14.1 permissive-",
+        "cppalliance/dronevs2017",
+        { TOOLSET: 'msvc-14.1', CXXSTD: '14,17', CXXFLAGS: '/permissive-' },
    ),

    windows_pipeline(
@@ -507,9 +493,21 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
        { TOOLSET: 'msvc-14.2', CXXSTD: '14,17,20,latest' },
    ),

+    windows_pipeline(
+        "Windows VS2019 msvc-14.2 permissive-",
+        "cppalliance/dronevs2019",
+        { TOOLSET: 'msvc-14.2', CXXSTD: '14,17', CXXFLAGS: '/permissive-' },
+    ),
+
    windows_pipeline(
        "Windows VS2022 msvc-14.3",
        "cppalliance/dronevs2022:1",
        { TOOLSET: 'msvc-14.3', CXXSTD: '14,17,20,latest' },
    ),
+
+    windows_pipeline(
+        "Windows VS2022 msvc-14.3 permissive-",
+        "cppalliance/dronevs2022:1",
+        { TOOLSET: 'msvc-14.3', CXXSTD: '14,17', CXXFLAGS: '/permissive-' },
+    ),
 ]
@@ -20,4 +20,5 @@ b2 -d0 headers

 if not "%CXXSTD%" == "" set CXXSTD=cxxstd=%CXXSTD%
 if not "%ADDRMD%" == "" set ADDRMD=address-model=%ADDRMD%
-b2 -j3 libs/%LIBRARY%/test toolset=%TOOLSET% %CXXSTD% %ADDRMD% variant=debug,release embed-manifest-via=linker
+if not "%CXXFLAGS%" == "" set CXXFLAGS=cxxflags=%CXXFLAGS%
+b2 --abbreviate-paths -j3 libs/%LIBRARY%/test toolset=%TOOLSET% %CXXSTD% %ADDRMD% %CXXFLAGS% variant=debug,release embed-manifest-via=linker
@@ -14,6 +14,11 @@ DRONE_BUILD_DIR=$(pwd)
 BOOST_BRANCH=develop
 if [ "$DRONE_BRANCH" = "master" ]; then BOOST_BRANCH=master; fi

+if [[ $(uname) == "Linux" && ( "$TSAN" == 1 || "$ASAN" == 1 ) ]]; then
+    echo 0 | sudo tee /proc/sys/kernel/randomize_va_space
+    sudo sysctl vm.mmap_rnd_bits=28
+fi
+
 cd ..
 git clone -b $BOOST_BRANCH --depth 1 https://github.com/boostorg/boost.git boost-root
 cd boost-root
@@ -32,6 +32,16 @@ env:
  CODECOV_NAME: Github Actions

 jobs:
+  runner-selection:
+    # runs-on: ubuntu-latest
+    runs-on: ${{ github.repository_owner == 'boostorg' && fromJSON('[ "self-hosted", "linux", "x64", "ubuntu-latest-aws" ]') || 'ubuntu-latest' }}
+    outputs:
+      labelmatrix: ${{ steps.aws_hosted_runners.outputs.labelmatrix }}
+    steps:
+      - name: AWS Hosted Runners
+        id: aws_hosted_runners
+        uses: cppalliance/aws-hosted-runners@v1.0.0
+
  posix:
    defaults:
      run:
@@ -42,50 +52,87 @@ jobs:
      matrix:
        include:
          # Linux, gcc
-          - { compiler: gcc-7,     cxxstd: '03,11,14,17',    os: ubuntu-20.04, install: 'g++-7' }
-          - { compiler: gcc-8,     cxxstd: '03,11,14,17',    os: ubuntu-20.04, install: 'g++-8' }
-          - { compiler: gcc-9,     cxxstd: '03,11,14,17',    os: ubuntu-20.04, install: 'g++-9' }
-          - { compiler: gcc-10,    cxxstd: '03,11,14,17,20', os: ubuntu-22.04, install: 'g++-10' }
-          - { compiler: gcc-11,    cxxstd: '03,11,14,17,20', os: ubuntu-22.04, install: 'g++-11' }
-          - { name: "gcc-12 w/ sanitizers (03,11,14)", sanitize: yes,
-              compiler: gcc-12,    cxxstd: '03,11,14',       os: ubuntu-22.04, ccache_key: "san1" }
-          - { name: "gcc-12 w/ sanitizers (17,20,2b)", sanitize: yes,
-              compiler: gcc-12,    cxxstd: '17,20,2b',       os: ubuntu-22.04, ccache_key: "san2" }
+          - { compiler: gcc-7,     cxxstd: '11,14,17',    os: 'ubuntu-20.04', install: 'g++-7' }
+          - { compiler: gcc-8,     cxxstd: '11,14,17',    os: 'ubuntu-20.04', install: 'g++-8' }
+          - { compiler: gcc-9,     cxxstd: '11,14,17',    os: 'ubuntu-22.04', install: 'g++-9' }
+          - { compiler: gcc-10,    cxxstd: '11,14,17,20', os: 'ubuntu-22.04', install: 'g++-10' }
+          - { compiler: gcc-11,    cxxstd: '11,14,17,20', os: 'ubuntu-22.04', install: 'g++-11' }
+          - { compiler: gcc-12,    cxxstd: '11,14,17,20', os: 'ubuntu-22.04', install: 'g++-12' }
+          - { compiler: gcc-13,    cxxstd: '11,14,17,20', os: 'ubuntu-24.04', install: 'g++-13' }
+          - { compiler: gcc-14,    cxxstd: '11,14,17,20', os: 'ubuntu-24.04', install: 'g++-14' }
+          - { name: "gcc-14 w/ sanitizers (11)", sanitize: yes,
+              compiler: gcc-14,    cxxstd: '11',          os: 'ubuntu-24.04', install: 'g++-14', ccache_key: "san1" }
+          - { name: "gcc-14 w/ sanitizers (14)", sanitize: yes,
+              compiler: gcc-14,    cxxstd: '14',          os: 'ubuntu-24.04', install: 'g++-14', ccache_key: "san1" }
+          - { name: "gcc-14 w/ sanitizers (17)", sanitize: yes,
+              compiler: gcc-14,    cxxstd: '17',          os: 'ubuntu-24.04', install: 'g++-14', ccache_key: "san2" }
+          - { name: "gcc-14 w/ sanitizers (20)", sanitize: yes,
+              compiler: gcc-14,    cxxstd: '20',          os: 'ubuntu-24.04', install: 'g++-14', ccache_key: "san2" }
+          - { name: "gcc-14 w/ sanitizers (2b)", sanitize: yes,
+              compiler: gcc-14,    cxxstd: '2b',          os: 'ubuntu-24.04', install: 'g++-14', ccache_key: "san2" }
          - { name: Collect coverage, coverage: yes,
-              compiler: gcc-12,     cxxstd: '03,20',          os: ubuntu-22.04, install: 'g++-12-multilib', address-model: '32,64', ccache_key: "cov" }
+              compiler: gcc-14,    cxxstd: '20',          os: 'ubuntu-24.04', install: 'g++-14 g++-14-multilib', address-model: '32,64', ccache_key: "cov" }

-          - { name: "cfoa tsan (gcc)", cxxstd: '11,14,17,20,2b', os: ubuntu-22.04, compiler: gcc-12,
-              targets: 'libs/unordered/test//cfoa_tests', thread-sanitize: yes }
+          - { name: "cfoa tsan (gcc-14)", cxxstd: '11,14,17,20,2b', os: 'ubuntu-24.04', install: 'g++-14', compiler: gcc-14,
+              targets: 'libs/unordered/test//cfoa_tests', thread-sanitize: yes, ccache_key: "tsan" }

          # Linux, clang, libc++
-          - { compiler: clang-7,   cxxstd: '03,11,14,17',       os: ubuntu-20.04, stdlib: libc++, install: 'clang-7 libc++-7-dev libc++abi-7-dev' }
-          - { compiler: clang-10,  cxxstd: '03,11,14,17,20',    os: ubuntu-20.04, stdlib: libc++, install: 'clang-10 libc++-10-dev libc++abi-10-dev' }
-          - { compiler: clang-11,  cxxstd: '03,11,14,17,20',    os: ubuntu-22.04, stdlib: libc++, install: 'clang-11 libc++-11-dev libc++abi-11-dev' }
-          # clang-12 doesn't work on ubuntu-22.04, the linker can't find -lunwind for some reason
-          - { name: "clang-12 w/ sanitizers (03,11,14)", sanitize: yes,
-              compiler: clang-12,  cxxstd: '03,11,14',          os: ubuntu-20.04, stdlib: libc++, install: 'clang-12 libc++-12-dev libc++abi-12-dev', ccache_key: "san1" }
-          - { name: "clang-12 w/ sanitizers (17,20,2b)", sanitize: yes,
-              compiler: clang-12,  cxxstd: '17,20,2b',          os: ubuntu-20.04, stdlib: libc++, install: 'clang-12 libc++-12-dev libc++abi-12-dev', ccache_key: "san2" }
-          - { compiler: clang-13,  cxxstd: '03,11,14,17,20,2b', os: ubuntu-22.04, stdlib: libc++, install: 'clang-13 libc++-13-dev libc++abi-13-dev' }
-          - { compiler: clang-14,  cxxstd: '03,11,14,17,20,2b', os: ubuntu-22.04, stdlib: libc++, install: 'clang-14 libc++-14-dev libc++abi-14-dev' }
+          - { compiler: clang-7,    cxxstd: '11,14,17',    os: 'ubuntu-20.04', stdlib: libc++, install: 'clang-7 libc++-7-dev libc++abi-7-dev' }
+          - { compiler: clang-10,   cxxstd: '11,14,17,20', os: 'ubuntu-20.04', stdlib: libc++, install: 'clang-10 libc++-10-dev libc++abi-10-dev' }
+          - { compiler: clang-11,   cxxstd: '11,14,17,20', os: 'ubuntu-22.04', stdlib: libc++, install: 'clang-11 libc++-11-dev libc++abi-11-dev' }
+          # clang-12 doesn't work on 'ubuntu-22.04', the linker can't find -lunwind for some reason
+          - { name: "clang-12 w/ sanitizers (11,14)", sanitize: yes,
+              compiler: clang-12,   cxxstd: '11,14',       os: 'ubuntu-20.04', stdlib: libc++, install: 'clang-12 libc++-12-dev libc++abi-12-dev', ccache_key: "san1" }
+          - { name: "clang-12 w/ sanitizers (17)", sanitize: yes,
+              compiler: clang-12,   cxxstd: '17',          os: 'ubuntu-20.04', stdlib: libc++, install: 'clang-12 libc++-12-dev libc++abi-12-dev', ccache_key: "san2" }
+          - { name: "clang-12 w/ sanitizers (20)", sanitize: yes,
+              compiler: clang-12,   cxxstd: '20',          os: 'ubuntu-20.04', stdlib: libc++, install: 'clang-12 libc++-12-dev libc++abi-12-dev', ccache_key: "san2" }
+          - { name: "clang-12 w/ sanitizers (2b)", sanitize: yes,
+              compiler: clang-12,   cxxstd: '2b',          os: 'ubuntu-20.04', stdlib: libc++, install: 'clang-12 libc++-12-dev libc++abi-12-dev', ccache_key: "san2" }
+          - { compiler: 'clang-13', cxxstd: '11,14',       os: 'ubuntu-22.04', stdlib: libc++, install: 'clang-13 libc++-13-dev libc++abi-13-dev' }
+          - { compiler: 'clang-13', cxxstd: '17,20,2b',    os: 'ubuntu-22.04', stdlib: libc++, install: 'clang-13 libc++-13-dev libc++abi-13-dev' }
+          - { compiler: 'clang-14', cxxstd: '11,14',       os: 'ubuntu-22.04', stdlib: libc++, install: 'clang-14 libc++-14-dev libc++abi-14-dev' }
+          - { compiler: 'clang-14', cxxstd: '17,20,2b',    os: 'ubuntu-22.04', stdlib: libc++, install: 'clang-14 libc++-14-dev libc++abi-14-dev' }
+          - { compiler: 'clang-15', cxxstd: '11,14',       os: 'ubuntu-22.04', stdlib: libc++, install: 'clang-15 libc++-15-dev libc++abi-15-dev' }
+          - { compiler: 'clang-15', cxxstd: '17,20,2b',    os: 'ubuntu-22.04', stdlib: libc++, install: 'clang-15 libc++-15-dev libc++abi-15-dev' }
+          - { compiler: 'clang-16', cxxstd: '11,14',       os: 'ubuntu-24.04', stdlib: libc++, install: 'clang-16 libc++-16-dev libc++abi-16-dev' }
+          - { compiler: 'clang-16', cxxstd: '17,20,2b',    os: 'ubuntu-24.04', stdlib: libc++, install: 'clang-16 libc++-16-dev libc++abi-16-dev' }
+          - { compiler: 'clang-17', cxxstd: '11,14',       os: 'ubuntu-24.04', stdlib: libc++, install: 'clang-17 libc++-17-dev libc++abi-17-dev' }
+          - { compiler: 'clang-17', cxxstd: '17,20,2b',    os: 'ubuntu-24.04', stdlib: libc++, install: 'clang-17 libc++-17-dev libc++abi-17-dev' }
+          - { compiler: 'clang-18', cxxstd: '11,14',       os: 'ubuntu-24.04', stdlib: libc++, install: 'clang-18 libc++-18-dev libc++abi-18-dev' }
+          - { compiler: 'clang-18', cxxstd: '17,20,2b',    os: 'ubuntu-24.04', stdlib: libc++, install: 'clang-18 libc++-18-dev libc++abi-18-dev' }
+          - { compiler: 'clang-19', cxxstd: '11,14',       os: 'ubuntu-24.04', stdlib: libc++, install: 'clang-19 libc++-19-dev libc++abi-19-dev' }
+          - { compiler: 'clang-19', cxxstd: '17,20,2b',    os: 'ubuntu-24.04', stdlib: libc++, install: 'clang-19 libc++-19-dev libc++abi-19-dev' }
+          - { compiler: 'clang-20', cxxstd: '11,14,17',    os: 'ubuntu-24.04', stdlib: libc++, install: 'clang-20 libc++-20-dev libc++abi-20-dev' }
+          - { compiler: 'clang-20', cxxstd: '20,23,2c',    os: 'ubuntu-24.04', stdlib: libc++, install: 'clang-20 libc++-20-dev libc++abi-20-dev' }

          # not using libc++ because of https://github.com/llvm/llvm-project/issues/52771
-          - { name: "clang-14 w/ sanitizers (03,11,14)", sanitize: yes,
-              compiler: clang-14,  cxxstd: '03,11,14',          os: ubuntu-22.04, ccache_key: "san1" }
-          - { name: "clang-14 w/ sanitizers (17,20,2b)", sanitize: yes,
-              compiler: clang-14,  cxxstd: '17,20,2b',          os: ubuntu-22.04, ccache_key: "san2" }
+          - { name: "clang-18 w/ sanitizers (11,14)", sanitize: yes,
+              compiler: clang-18,  cxxstd: '11,14', os: 'ubuntu-24.04', ccache_key: "san1" }
+          - { name: "clang-18 w/ sanitizers (17)", sanitize: yes,
+              compiler: clang-18,  cxxstd: '17',    os: 'ubuntu-24.04', ccache_key: "san2" }
+          - { name: "clang-18 w/ sanitizers (20)", sanitize: yes,
+              compiler: clang-18,  cxxstd: '20',   container: 'ubuntu:24.04',  os: 'ubuntu-latest', ccache_key: "san2" }
+          - { name: "clang-18 w/ sanitizers (2b)", sanitize: yes,
+              compiler: clang-18,  cxxstd: '2b',   container: 'ubuntu:24.04',  os: 'ubuntu-latest', ccache_key: "san2" }

-          - { name: "cfoa tsan (clang)", cxxstd: '11,14,17,20,2b', os: ubuntu-22.04, compiler: clang-14,
-              targets: 'libs/unordered/test//cfoa_tests', thread-sanitize: yes, 
-              stdlib: libc++, install: 'clang-14 libc++-14-dev libc++abi-14-dev' }
+          - { name: "cfoa tsan (clang-18)", cxxstd: '11,14,17,20,2b', os: 'ubuntu-24.04', compiler: clang-18,
+              targets: 'libs/unordered/test//cfoa_tests', thread-sanitize: yes,
+              stdlib: libc++, install: 'clang-18 libc++-18-dev libc++abi-18-dev', ccache_key: "tsan" }

          # OSX, clang
-          - { compiler: clang,     cxxstd: '03,11,14,17,2a',    os: macos-11, }
-          - { compiler: clang,     cxxstd: '03,11,14,17,2a',    os: macos-12, sanitize: yes }
-          - { compiler: clang,     cxxstd: '11,14,17,2a',       os: macos-12, thread-sanitize: yes, targets: 'libs/unordered/test//cfoa_tests' }
+          - { compiler: clang, cxxstd: '11,14,17,20,2b', os: 'macos-latest', sanitize: yes, ccache: no, ccache_key: "san1" }
+          - { compiler: clang, cxxstd: '11,14,17,20,2b', os: 'macos-latest', thread-sanitize: yes, targets: 'libs/unordered/test//cfoa_tests', ccache: no, ccache_key: "tsan" }

-    timeout-minutes: 180
-    runs-on: ${{matrix.os}}
+          - { compiler: clang, cxxstd: '11,14,17,20,2b', os: 'macos-14' }
+          - { compiler: clang, cxxstd: '11,14,17,20,23,2c', os: 'macos-15' }
+          - { compiler: clang, cxxstd: '11,14,17,20,23,2c', os: 'macos-26' }
+
+    timeout-minutes: 360
+    # posix (gcc-12 w/ sanitizers is taking longer than 210 minutes
+    # timeout-minutes: 210
+    needs: [runner-selection]
+    runs-on: ${{ fromJSON(needs.runner-selection.outputs.labelmatrix)[matrix.os] }}
    container: ${{matrix.container}}
    env: {B2_USE_CCACHE: 1}

@@ -103,7 +150,7 @@ jobs:
                apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys E1DD270288B4E6030699E45FA1715D88E1DF1F24
                for i in {1..${NET_RETRY_COUNT:-3}}; do sudo -E add-apt-repository -y ppa:git-core/ppa && break || sleep 10; done
                apt-get -o Acquire::Retries=$NET_RETRY_COUNT update
-                apt-get -o Acquire::Retries=$NET_RETRY_COUNT install -y g++ python libpython-dev git
+                apt-get -o Acquire::Retries=$NET_RETRY_COUNT install -y g++ python-is-python3 git
            fi
            # For jobs not compatible with ccache, use "ccache: no" in the matrix
            if [[ "${{ matrix.ccache }}" == "no" ]]; then
@@ -208,11 +255,18 @@ jobs:

      - name: Run tests
        if: '!matrix.coverity'
-        run: B2_TARGETS=${{matrix.targets}} ci/build.sh
+        run: |
+            if [[ ${B2_TSAN} == "yes" ]] && [[ $(uname) == "Linux" ]]; then
+                echo 0 | sudo tee /proc/sys/kernel/randomize_va_space
+                sudo sysctl vm.mmap_rnd_bits=28
+            fi
+            B2_TARGETS=${{matrix.targets}} ci/build.sh

      - name: Upload coverage
        if: matrix.coverage
        run: ci/codecov.sh "upload"
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

      - name: Run coverity
        if: matrix.coverity && github.event_name == 'push' && (github.ref_name == 'develop' || github.ref_name == 'master')
@@ -229,15 +283,20 @@ jobs:
      fail-fast: false
      matrix:
        include:
-          - { toolset: msvc-14.0, cxxstd: '14,latest',       addrmd: '32,64', os: windows-2019, variant: 'debug,release' }
-          - { toolset: msvc-14.2, cxxstd: '14,17,20,latest', addrmd: '32,64', os: windows-2019, variant: 'debug,release' }
-          - { toolset: msvc-14.3, cxxstd: '14,17,20,latest', addrmd: '32,64', os: windows-2022, variant: 'debug,release' }
-          - { toolset: msvc-14.3, cxxstd: '14',              addrmd: '64',    os: windows-2022, variant: 'debug', defines: '_ALLOW_RTCc_IN_STL', cxxflags: '/RTCc'              }
-          - { toolset: msvc-14.3, cxxstd: '14',              addrmd: '32',    os: windows-2022, variant: 'debug', defines: '_ALLOW_RTCc_IN_STL', cxxflags: '"/RTCc /arch:IA32"' }
-          - { toolset: clang-win, cxxstd: '14,17,latest',    addrmd: '32,64', os: windows-2022, variant: 'debug,release' }
-          - { toolset: gcc,       cxxstd: '03,11,14,17,2a',  addrmd: '64',    os: windows-2019, variant: 'debug,release' }
+          - { toolset: msvc-14.0, cxxstd: '14,latest',       addrmd: '32,64', os: 'windows-2019', variant: 'debug,release' }
+          - { toolset: msvc-14.2, cxxstd: '14,17',           addrmd: '32,64', os: 'windows-2019', variant: 'debug,release' }
+          - { toolset: msvc-14.2, cxxstd: '20,latest',       addrmd: '32,64', os: 'windows-2019', variant: 'debug,release' }
+          - { toolset: msvc-14.3, cxxstd: '14,17,20,latest', addrmd: '32,64', os: 'windows-2022', variant: 'debug,release' }
+          - { toolset: msvc-14.3, cxxstd: '14',              addrmd: '64',    os: 'windows-2022', variant: 'debug', defines: '_ALLOW_RTCc_IN_STL', cxxflags: '/RTCc'              }
+          - { toolset: msvc-14.3, cxxstd: '14',              addrmd: '32',    os: 'windows-2022', variant: 'debug', defines: '_ALLOW_RTCc_IN_STL', cxxflags: '"/RTCc /arch:IA32"' }
+          - { toolset: msvc-14.3, cxxstd: '14,17',           addrmd: '32,64', os: 'windows-2022', variant: 'debug,release', cxxflags: '/permissive-' }
+          - { toolset: clang-win, cxxstd: '14,17,latest',    addrmd: '32,64', os: 'windows-2022', variant: 'debug,release' }
+          - { toolset: clang-win, cxxstd: '14,17,latest',    addrmd: '32,64', os: 'windows-2025', variant: 'debug,release' } 
+          - { toolset: msvc-14.3, cxxstd: '14,17,20,latest', addrmd: '32,64', os: 'windows-2025', variant: 'debug,release' }
+          - { toolset: gcc,       cxxstd: '11,14,17,2a',     addrmd: '64',    os: 'windows-2019', variant: 'debug,release' }

-    runs-on: ${{matrix.os}}
+    needs: [runner-selection]
+    runs-on: ${{ fromJSON(needs.runner-selection.outputs.labelmatrix)[matrix.os] }}

    steps:
      - uses: actions/checkout@v3
@@ -291,10 +350,11 @@ jobs:
      fail-fast: false
      matrix:
        include:
-          - { sys: MINGW32, compiler: gcc, cxxstd: '03,11,17,20' }
-          - { sys: MINGW64, compiler: gcc, cxxstd: '03,11,17,20' }
+          - { sys: MINGW32, compiler: gcc, cxxstd: '11,17,20', variant: 'release' }
+          - { sys: MINGW64, compiler: gcc, cxxstd: '11,17,20', variant: 'debug,release' }

-    runs-on: windows-latest
+    needs: [runner-selection]
+    runs-on: ${{ fromJSON(needs.runner-selection.outputs.labelmatrix)['windows-latest'] }}

    steps:
      - uses: actions/checkout@v3
@@ -325,9 +385,12 @@ jobs:
          B2_CXXSTD: ${{matrix.cxxstd}}
          B2_SANITIZE: ${{matrix.sanitize}}
          B2_STDLIB: ${{matrix.stdlib}}
+          B2_VARIANT: ${{matrix.variant}}
        run: ci/github/install.sh

      - name: Run tests
+        env:
+          B2_VARIANT: ${{matrix.variant}}
        run: ci/build.sh

      # Run also the CMake tests to avoid having to setup another matrix for CMake on MSYS
@@ -348,11 +411,12 @@ jobs:
      fail-fast: false
      matrix:
        include:
-          - { os: ubuntu-20.04, build_shared: ON,  build_type: Debug, generator: 'Unix Makefiles' }
-          - { os: windows-2019, build_shared: ON,  build_type: Debug, generator: 'Visual Studio 16 2019' }
+          - { os: 'ubuntu-20.04', build_shared: ON,  build_type: Debug, generator: 'Unix Makefiles' }
+          - { os: 'windows-2019', build_shared: ON,  build_type: Debug, generator: 'Visual Studio 16 2019' }

    timeout-minutes: 120
-    runs-on: ${{matrix.os}}
+    needs: [runner-selection]
+    runs-on: ${{ fromJSON(needs.runner-selection.outputs.labelmatrix)[matrix.os] }}

    steps:
      - uses: actions/checkout@v3
@@ -3,7 +3,7 @@
 # Distributed under the Boost Software License, Version 1.0.
 # https://www.boost.org/LICENSE_1_0.txt

-cmake_minimum_required(VERSION 3.5...3.20)
+cmake_minimum_required(VERSION 3.8...3.20)

 project(boost_unordered VERSION "${BOOST_SUPERPROJECT_VERSION}" LANGUAGES CXX)

@@ -18,16 +18,22 @@ target_link_libraries(boost_unordered
    Boost::config
    Boost::container_hash
    Boost::core
-    Boost::move
    Boost::mp11
    Boost::predef
-    Boost::preprocessor
-    Boost::static_assert
    Boost::throw_exception
-    Boost::tuple
-    Boost::type_traits
 )

+if(CMAKE_VERSION VERSION_GREATER 3.18 AND CMAKE_GENERATOR MATCHES "Visual Studio")
+
+  file(GLOB_RECURSE boost_unordered_IDEFILES CONFIGURE_DEPENDS include/*.hpp)
+  source_group(TREE ${PROJECT_SOURCE_DIR}/include FILES ${boost_unordered_IDEFILES} PREFIX "Header Files")
+  list(APPEND boost_unordered_IDEFILES extra/boost_unordered.natvis)
+  target_sources(boost_unordered PRIVATE ${boost_unordered_IDEFILES})
+
+endif()
+
+target_compile_features(boost_unordered INTERFACE cxx_std_11)
+
 if(BUILD_TESTING AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/test/CMakeLists.txt")

  add_subdirectory(test)
@@ -1,49 +1,79 @@
 # Boost.Unordered

-Part of collection of the [Boost C++ Libraries](http://github.com/boostorg).
+[![Branch](https://img.shields.io/badge/branch-master-brightgreen.svg)](https://github.com/boostorg/unordered/tree/master) [![CI](https://github.com/boostorg/unordered/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/boostorg/unordered/actions/workflows/ci.yml) [![Drone status](https://img.shields.io/drone/build/boostorg/unordered/master?server=https%3A%2F%2Fdrone.cpp.al&logo=drone&logoColor=%23CCCCCC&label=CI)](https://drone.cpp.al/boostorg/unordered) [![Build status](https://img.shields.io/appveyor/build/cppalliance/unordered/master?logo=appveyor&label=CI)](https://ci.appveyor.com/project/cppalliance/unordered/branch/master)  [![codecov](https://codecov.io/gh/boostorg/unordered/branch/master/graph/badge.svg)](https://codecov.io/gh/boostorg/unordered/branch/master)  [![Deps](https://img.shields.io/badge/deps-master-brightgreen.svg)](https://pdimov.github.io/boostdep-report/master/unordered.html)  [![Documentation](https://img.shields.io/badge/docs-master-brightgreen.svg)](https://www.boost.org/doc/libs/master/libs/unordered/index.html)  [![Enter the Matrix](https://img.shields.io/badge/matrix-master-brightgreen.svg)](https://regression.boost.org/master/developer/unordered.html)<br/>
+[![Branch](https://img.shields.io/badge/branch-develop-brightgreen.svg)](https://github.com/boostorg/unordered/tree/develop) [![CI](https://github.com/boostorg/unordered/actions/workflows/ci.yml/badge.svg?branch=develop)](https://github.com/boostorg/unordered/actions/workflows/ci.yml) [![Drone status](https://img.shields.io/drone/build/boostorg/unordered/develop?server=https%3A%2F%2Fdrone.cpp.al&logo=drone&logoColor=%23CCCCCC&label=CI)](https://drone.cpp.al/boostorg/unordered) [![Build status](https://img.shields.io/appveyor/build/cppalliance/unordered/develop?logo=appveyor&label=CI)](https://ci.appveyor.com/project/cppalliance/unordered/branch/develop) [![codecov](https://codecov.io/gh/boostorg/unordered/branch/develop/graph/badge.svg)](https://codecov.io/gh/boostorg/unordered/branch/develop) [![Deps](https://img.shields.io/badge/deps-develop-brightgreen.svg)](https://pdimov.github.io/boostdep-report/develop/unordered.html) [![Documentation](https://img.shields.io/badge/docs-develop-brightgreen.svg)](https://www.boost.org/doc/libs/develop/libs/unordered/index.html) [![Enter the Matrix](https://img.shields.io/badge/matrix-develop-brightgreen.svg)](https://regression.boost.org/develop/developer/unordered.html)<br/>
+[![BSL 1.0](https://img.shields.io/badge/license-BSL_1.0-blue.svg)](https://www.boost.org/users/license.html) <img alt="C++11 required" src="https://img.shields.io/badge/standard-C%2b%2b11-blue.svg"> <img alt="Header-only library" src="https://img.shields.io/badge/build-header--only-blue.svg">

-For accessing data based on key lookup, the C++ standard library offers `std::set`, `std::map`, `std::multiset` and `std::multimap`.
-These are generally implemented using balanced binary trees so that lookup time has logarithmic complexity.
-That is generally okay, but in many cases a hash table can perform better, as accessing data has constant complexity, on average.
-The worst case complexity is linear, but that occurs rarely and with some care, can be avoided.
+Boost.Unordered offers a catalog of hash containers with different standards compliance levels, performances and intented usage scenarios:

-Also, the existing containers require a 'less than' comparison object to order their elements.
-For some data types this is impossible to implement or isn’t practical.
-In contrast, a hash table only needs an equality function and a hash function for the key.
+**`boost::unordered_set` `boost::unordered_map` `boost::unordered_multiset` `boost::unordered_multimap`**

-With this in mind, unordered associative containers were added to the C++ standard.
-This is an implementation of the containers described in C++11, with some deviations from the standard in order to work with non-C++11 compilers and libraries.
+<ul>Fully conformant implementations of <code>std::unordered_[multi](set|map)</code>,
+but faster and up to the latest revisions of the standard even if you're working in an older version of C++ (heterogeneous lookup,
+<code>try_emplace</code>, <code>contains</code>, etc.)</ul>

+**`boost::unordered_flat_set` `boost::unordered_flat_map`**

-### License
+<ul>The fastest of the lot. Based on open addressing, these containers slightly
+deviate from the standard in exchange for top performance.</ul>

-Distributed under the [Boost Software License, Version 1.0](http://www.boost.org/LICENSE_1_0.txt).
+**`boost::unordered_node_set` `boost::unordered_node_map`**

-### Properties
+<ul>Variations of <code>boost::unordered_flat_(set|map)</code> providing pointer stability.</ul>

-* C++03
-* Header-Only
+**`boost::concurrent_flat_set` `boost::concurrent_flat_map`**

-### Build Status
+<ul>High performance for multithreaded scenarios. Introducing a new non-standard, iterator-free API.</ul>

-Branch          | GH Actions | Appveyor | codecov.io | Deps | Docs | Tests |
-:-------------: | ---------- | -------- | ---------- | ---- | ---- | ----- |
-[`master`](https://github.com/boostorg/unordered/tree/master)   | [![CI](https://github.com/boostorg/unordered/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/boostorg/unordered/actions/workflows/ci.yml)  | [![Build status](https://ci.appveyor.com/api/projects/status/github/boostorg/unordered?branch=master&svg=true)](https://ci.appveyor.com/project/danieljames/unordered-qtwe6/branch/master)   | [![codecov](https://codecov.io/gh/boostorg/unordered/branch/master/graph/badge.svg)](https://codecov.io/gh/boostorg/unordered/branch/master)   | [![Deps](https://img.shields.io/badge/deps-master-brightgreen.svg)](https://pdimov.github.io/boostdep-report/master/unordered.html)   | [![Documentation](https://img.shields.io/badge/docs-master-brightgreen.svg)](https://www.boost.org/doc/libs/master/libs/unordered/doc/html/unordered.html)   | [![Enter the Matrix](https://img.shields.io/badge/matrix-master-brightgreen.svg)](http://www.boost.org/development/tests/master/developer/unordered.html)
-[`develop`](https://github.com/boostorg/unordered/tree/develop) | [![CI](https://github.com/boostorg/unordered/actions/workflows/ci.yml/badge.svg?branch=develop)](https://github.com/boostorg/unordered/actions/workflows/ci.yml) | [![Build status](https://ci.appveyor.com/api/projects/status/github/boostorg/unordered?branch=develop&svg=true)](https://ci.appveyor.com/project/danieljames/unordered-qtwe6/branch/develop) | [![codecov](https://codecov.io/gh/boostorg/unordered/branch/develop/graph/badge.svg)](https://codecov.io/gh/boostorg/unordered/branch/develop) | [![Deps](https://img.shields.io/badge/deps-develop-brightgreen.svg)](https://pdimov.github.io/boostdep-report/develop/unordered.html) | [![Documentation](https://img.shields.io/badge/docs-develop-brightgreen.svg)](https://www.boost.org/doc/libs/develop/libs/unordered/doc/html/unordered.html) | [![Enter the Matrix](https://img.shields.io/badge/matrix-develop-brightgreen.svg)](http://www.boost.org/development/tests/develop/developer/unordered.html)
+**`boost::concurrent_node_set` `boost::concurrent_node_map`**

-### Directories
+<ul>Variations of <code>boost::concurrent_flat_(set|map)</code> providing pointer stability.</ul>

-| Name        | Purpose                        |
-| ----------- | ------------------------------ |
-| `doc`       | documentation                  |
-| `example`   | examples                       |
-| `include`   | headers                        |
-| `test`      | unit tests                     |
+## Learn about Boost.Unordered

-### More information
+* [Online documentation](https://boost.org/libs/unordered)
+* [Some benchmarks](https://github.com/boostorg/boost_unordered_benchmarks)
+* Technical articles on Boost.Unordered internal design:
+  * [Advancing the state of the art for `std::unordered_map` implementations](https://bannalia.blogspot.com/2022/06/advancing-state-of-art-for.html)
+  * [Inside `boost::unordered_flat_map`](https://bannalia.blogspot.com/2022/11/inside-boostunorderedflatmap.html)
+  * [Inside `boost::concurrent_flat_map`](https://bannalia.blogspot.com/2023/07/inside-boostconcurrentflatmap.html)
+  * [Bulk visitation in `boost::concurrent_flat_map`](https://bannalia.blogspot.com/2023/10/bulk-visitation-in-boostconcurrentflatm.html)
+* Debugging visualizers for Boost.Unordered:
+  * [Natvis for boost::unordered_map, and how to use &lt;Intrinsic&gt; elements](https://blog.ganets.ky/NatvisForUnordered/)
+  * [Natvis for boost::concurrent_flat_map, and why fancy pointers are hard](https://blog.ganets.ky/NatvisForUnordered2/)
+  * [Visualizing boost::unordered_map in GDB, with pretty-printer customization points](https://blog.ganets.ky/PrettyPrinter/)

-* [Ask questions](http://stackoverflow.com/questions/ask?tags=c%2B%2B,boost,boost-unordered)
-* [Report bugs](https://github.com/boostorg/unordered/issues): Be sure to mention Boost version, platform and compiler you're using. A small compilable code sample to reproduce the problem is always good as well.
-* Submit your patches as pull requests against **develop** branch. Note that by submitting patches you agree to license your modifications under the [Boost Software License, Version 1.0](http://www.boost.org/LICENSE_1_0.txt).
-* Discussions about the library are held on the [Boost developers mailing list](http://www.boost.org/community/groups.html#main). Be sure to read the [discussion policy](http://www.boost.org/community/policy.html) before posting and add the `[unordered]` tag at the beginning of the subject line.
+Boost.Unordered can be installed in a number of ways:

+* [Download Boost](https://www.boost.org/users/download/) and you're ready to go (this is a header-only library requiring no building).
+* Using Conan 2: In case you don't have it yet, add an entry for Boost in your `conanfile.txt` (the example requires at least Boost 1.86):
+```
+[requires]
+boost/[>=1.86.0]
+```
+<ul>If you're not using any compiled Boost library, the following will skip building altogether:</ul>
+
+```
+[options]
+boost:header_only=True
+```
+* Using vcpkg: Execute the command
+```
+vcpkg install boost-unordered
+```
+* Using CMake: [Boost CMake support infrastructure](https://github.com/boostorg/cmake)
+allows you to use CMake directly to download, build and consume all of Boost or
+some specific libraries.
+
+## Support
+
+* Join the **#boost-unordered** discussion group at [cpplang.slack.com](https://cpplang.slack.com/)
+([ask for an invite](https://cppalliance.org/slack/) if you’re not a member of this workspace yet)
+* Ask in the [Boost Users mailing list](https://lists.boost.org/mailman/listinfo.cgi/boost-users)
+(add the `[unordered]` tag at the beginning of the subject line)
+* [File an issue](https://github.com/boostorg/unordered/issues)
+
+## Contribute
+
+* [Pull requests](https://github.com/boostorg/unordered/pulls) against **develop** branch are most welcome.
+Note that by submitting patches you agree to license your modifications under the [Boost Software License, Version 1.0](http://www.boost.org/LICENSE_1_0.txt).
@@ -1,5 +1,5 @@
 // Copyright 2021 Peter Dimov.
-// Copyright 2023 Joaquin M Lopez Munoz.
+// Copyright 2023-2024 Joaquin M Lopez Munoz.
 // Distributed under the Boost Software License, Version 1.0.
 // https://www.boost.org/LICENSE_1_0.txt

@@ -25,6 +25,7 @@
 #include <iostream>
 #include <iomanip>
 #include <chrono>
+#include <type_traits>

 using namespace std::chrono_literals;

@@ -341,7 +342,7 @@ template<> struct fnv1a_hash_impl<64>

 struct fnv1a_hash: fnv1a_hash_impl< std::numeric_limits<std::size_t>::digits >
 {
-    using is_avalanching = void;
+    using is_avalanching = std::true_type;
 };

 template<class K, class V> using std_unordered_map_fnv1a =
@@ -0,0 +1,343 @@
+// Copyright 2021 Peter Dimov.
+// Copyright 2023-2024 Joaquin M Lopez Munoz.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#define _SILENCE_CXX17_OLD_ALLOCATOR_MEMBERS_DEPRECATION_WARNING
+#define _SILENCE_CXX20_CISO646_REMOVED_WARNING
+
+#define BOOST_UNORDERED_ENABLE_STATS
+
+#include <boost/unordered/unordered_flat_map.hpp>
+#include <boost/core/detail/splitmix64.hpp>
+#include <boost/config.hpp>
+#include <unordered_map>
+#include <vector>
+#include <memory>
+#include <cstdint>
+#include <iostream>
+#include <iomanip>
+#include <chrono>
+#include <type_traits>
+
+using namespace std::chrono_literals;
+
+static void print_time( std::chrono::steady_clock::time_point & t1, char const* label, std::uint32_t s, std::size_t size )
+{
+    auto t2 = std::chrono::steady_clock::now();
+
+    std::cout << label << ": " << ( t2 - t1 ) / 1ms << " ms (s=" << s << ", size=" << size << ")\n";
+
+    t1 = t2;
+}
+
+constexpr unsigned N = 50'000;
+constexpr int K = 10;
+
+static std::vector<std::string> indices1, indices2;
+
+static std::string make_index( unsigned x )
+{
+    char buffer[ 64 ];
+    std::snprintf( buffer, sizeof(buffer), "pfx_%u_sfx", x );
+
+    return buffer;
+}
+
+static std::string make_random_index( unsigned x )
+{
+    char buffer[ 64 ];
+    std::snprintf( buffer, sizeof(buffer), "pfx_%0*d_%u_sfx", x % 8 + 1, 0, x );
+
+    return buffer;
+}
+
+static void init_indices()
+{
+    indices1.reserve( N*2+1 );
+    indices1.push_back( make_index( 0 ) );
+
+    for( unsigned i = 1; i <= N*2; ++i )
+    {
+        indices1.push_back( make_index( i ) );
+    }
+
+    indices2.reserve( N*2+1 );
+    indices2.push_back( make_index( 0 ) );
+
+    {
+        boost::detail::splitmix64 rng;
+
+        for( unsigned i = 1; i <= N*2; ++i )
+        {
+            indices2.push_back( make_random_index( static_cast<std::uint32_t>( rng() ) ) );
+        }
+    }
+}
+
+template<class Map> BOOST_NOINLINE void test_insert( Map& map, std::chrono::steady_clock::time_point & t1 )
+{
+    for( unsigned i = 1; i <= N; ++i )
+    {
+        map.insert( { indices1[ i ], i } );
+    }
+
+    print_time( t1, "Consecutive insert",  0, map.size() );
+
+    for( unsigned i = 1; i <= N; ++i )
+    {
+        map.insert( { indices2[ i ], i } );
+    }
+
+    print_time( t1, "Random insert",  0, map.size() );
+
+    std::cout << std::endl;
+}
+
+template<class Map> BOOST_NOINLINE void test_lookup( Map& map, std::chrono::steady_clock::time_point & t1 )
+{
+    std::uint32_t s;
+    
+    s = 0;
+
+    for( int j = 0; j < K; ++j )
+    {
+        for( unsigned i = 1; i <= N * 2; ++i )
+        {
+            auto it = map.find( indices1[ i ] );
+            if( it != map.end() ) s += it->second;
+        }
+    }
+
+    print_time( t1, "Consecutive lookup",  s, map.size() );
+
+    s = 0;
+
+    for( int j = 0; j < K; ++j )
+    {
+        for( unsigned i = 1; i <= N * 2; ++i )
+        {
+            auto it = map.find( indices2[ i ] );
+            if( it != map.end() ) s += it->second;
+        }
+    }
+
+    print_time( t1, "Random lookup",  s, map.size() );
+
+    std::cout << std::endl;
+}
+
+template<class Map> BOOST_NOINLINE void test_iteration( Map& map, std::chrono::steady_clock::time_point & t1 )
+{
+    auto it = map.begin();
+
+    while( it != map.end() )
+    {
+        if( it->second & 1 )
+        {
+            if constexpr( std::is_void_v< decltype( map.erase( it ) ) > )
+            {
+                map.erase( it++ );
+            }
+            else
+            {
+                it = map.erase( it );
+            }
+        }
+        else
+        {
+            ++it;
+        }
+    }
+
+    print_time( t1, "Iterate and erase odd elements",  0, map.size() );
+
+    std::cout << std::endl;
+}
+
+template<class Map> BOOST_NOINLINE void test_erase( Map& map, std::chrono::steady_clock::time_point & t1 )
+{
+    for( unsigned i = 1; i <= N; ++i )
+    {
+        map.erase( indices1[ i ] );
+    }
+
+    print_time( t1, "Consecutive erase",  0, map.size() );
+
+    for( unsigned i = 1; i <= N; ++i )
+    {
+        map.erase( indices2[ i ] );
+    }
+
+    print_time( t1, "Random erase",  0, map.size() );
+
+    std::cout << std::endl;
+}
+
+//
+
+// All Unordered container use the same struct
+using stats = boost::unordered_flat_map<int, int>::stats; 
+
+struct record
+{
+    std::string label_;
+    long long time_;
+    stats stats_;
+};
+
+static std::vector<record> records;
+
+template<template<class...> class Map> BOOST_NOINLINE void test( char const* label )
+{
+    std::cout << label << ":\n\n";
+
+    Map<std::string, std::uint32_t> map;
+
+    auto t0 = std::chrono::steady_clock::now();
+    auto t1 = t0;
+
+    test_insert( map, t1 );
+
+    record rec = { label, 0 };
+
+    test_lookup( map, t1 );
+    test_iteration( map, t1 );
+    test_lookup( map, t1 );
+    test_erase( map, t1 );
+
+    auto tN = std::chrono::steady_clock::now();
+    std::cout << "Total: " << ( tN - t0 ) / 1ms << " ms\n\n";
+
+    rec.time_ = ( tN - t0 ) / 1ms;
+    rec.stats_ = map.get_stats();
+    records.push_back( rec );
+}
+
+//
+
+template<class K, class V> using boost_unordered_flat_map =
+    boost::unordered_flat_map<K, V, boost::hash<K>, std::equal_to<K>>;
+
+// fnv1a_hash
+
+template<int Bits> struct fnv1a_hash_impl;
+
+template<> struct fnv1a_hash_impl<32>
+{
+    std::size_t operator()( std::string const& s ) const
+    {
+        std::size_t h = 0x811C9DC5u;
+
+        char const * first = s.data();
+        char const * last = first + s.size();
+
+        for( ; first != last; ++first )
+        {
+            h ^= static_cast<unsigned char>( *first );
+            h *= 0x01000193ul;
+        }
+
+        return h;
+    }
+};
+
+template<> struct fnv1a_hash_impl<64>
+{
+    std::size_t operator()( std::string const& s ) const
+    {
+        std::size_t h = 0xCBF29CE484222325ull;
+
+        char const * first = s.data();
+        char const * last = first + s.size();
+
+        for( ; first != last; ++first )
+        {
+            h ^= static_cast<unsigned char>( *first );
+            h *= 0x00000100000001B3ull;
+        }
+
+        return h;
+    }
+};
+
+struct fnv1a_hash: fnv1a_hash_impl< std::numeric_limits<std::size_t>::digits >
+{
+    using is_avalanching = std::true_type;
+};
+
+template<class K, class V> using boost_unordered_flat_map_fnv1a =
+    boost::unordered_flat_map<K, V, fnv1a_hash, std::equal_to<K>>;
+
+// slightly bad hash
+
+struct slightly_bad_hash
+{
+    using is_avalanching = std::true_type;
+
+    std::size_t operator()( std::string const& s ) const
+    {
+       std::size_t h = s.size();
+
+       for( auto ch: s )
+       {
+         h *= 0x811C9DC4u; // multiplicative factor is even!
+         h += static_cast<std::size_t>( ch );
+       }
+
+       return h;
+    }
+};
+
+template<class K, class V> using boost_unordered_flat_map_slightly_bad_hash =
+    boost::unordered_flat_map<K, V, slightly_bad_hash, std::equal_to<K>>;
+
+// bad hash
+
+struct bad_hash
+{
+    using is_avalanching = std::true_type;
+
+    std::size_t operator()( std::string const& s ) const
+    {
+       std::size_t h = s.size();
+
+       for( auto ch: s )
+       {
+         h *= 31;
+         h += static_cast<std::size_t>( ch );
+       }
+
+       return h;
+    }
+};
+
+template<class K, class V> using boost_unordered_flat_map_bad_hash =
+    boost::unordered_flat_map<K, V, bad_hash, std::equal_to<K>>;
+
+//
+
+int main()
+{
+    init_indices();
+
+    test<boost_unordered_flat_map>( "boost::unordered_flat_map" );
+    test<boost_unordered_flat_map_fnv1a>( "boost::unordered_flat_map, FNV-1a" );
+    test<boost_unordered_flat_map_slightly_bad_hash>( "boost::unordered_flat_map, slightly_bad_hash" );
+    test<boost_unordered_flat_map_bad_hash>( "boost::unordered_flat_map, bad_hash" );
+
+    std::cout << "---\n\n";
+
+    for( auto const& x: records )
+    {
+        std::cout << std::setw( 46 ) << ( x.label_ + ": " ) << std::setw( 5 ) << x.time_ << " ms\n"
+                  << std::setw( 46 ) << "insertion: "
+                      << "probe length " << x.stats_.insertion.probe_length.average << "\n"
+                  << std::setw( 46 ) << "successful lookup: "
+                      << "probe length " << x.stats_.successful_lookup.probe_length.average 
+                      << ", num comparisons " << x.stats_.successful_lookup.num_comparisons.average << "\n"
+                  << std::setw( 46 ) << "unsuccessful lookup: "
+                      << "probe length " << x.stats_.unsuccessful_lookup.probe_length.average 
+                      << ", num comparisons " << x.stats_.unsuccessful_lookup.num_comparisons.average << "\n\n";
+    }
+}
@@ -1,5 +1,5 @@
 // Copyright 2021 Peter Dimov.
-// Copyright 2023 Joaquin M Lopez Munoz.
+// Copyright 2023-2024 Joaquin M Lopez Munoz.
 // Distributed under the Boost Software License, Version 1.0.
 // https://www.boost.org/LICENSE_1_0.txt

@@ -26,6 +26,7 @@
 #include <iostream>
 #include <iomanip>
 #include <chrono>
+#include <type_traits>

 using namespace std::chrono_literals;

@@ -342,7 +343,7 @@ template<> struct fnv1a_hash_impl<64>

 struct fnv1a_hash: fnv1a_hash_impl< std::numeric_limits<std::size_t>::digits >
 {
-    using is_avalanching = void;
+    using is_avalanching = std::true_type;
 };

 template<class K, class V> using std_unordered_map_fnv1a =
@@ -0,0 +1,26 @@
+# Copyright 2023-2024 René Ferdinand Rivera Morell
+# Copyright 2024 Peter Dimov
+# Distributed under the Boost Software License, Version 1.0.
+# https://www.boost.org/LICENSE_1_0.txt
+
+require-b2 5.2 ;
+
+constant boost_dependencies :
+    /boost/assert//boost_assert
+    /boost/config//boost_config
+    /boost/container_hash//boost_container_hash
+    /boost/core//boost_core
+    /boost/mp11//boost_mp11
+    /boost/predef//boost_predef
+    /boost/throw_exception//boost_throw_exception
+    ;
+
+project /boost/unordered ;
+
+explicit
+    [ alias boost_unordered : : : : <include>include <library>$(boost_dependencies) ]
+    [ alias all : boost_unordered test ]
+    ;
+
+call-if : boost-library unordered
+    ;
@@ -0,0 +1,2 @@
+/build/
+/node_modules/
@@ -1,21 +1,57 @@
-# Copyright 2005 Daniel James.
-# Distributed under the Boost Software License, Version 1.0. (See accompanying
-# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+import generate ;
+import path ;
+import property-set ;
+import virtual-target ;

-import asciidoctor ;
+path-constant HERE : . ;

-html unordered.html : unordered.adoc ;
+make html/index.html : build_antora.sh : @run-script ;
+generate files-to-install : html/index.html : <generating-rule>@delayed-glob ;
+install install
+  : files-to-install
+  : <location>html
+    <install-source-root>html/unordered
+  ;
+explicit html/index.html files-to-install ;

-install html_ : unordered.html : <location>html ;
+# this runs the antora script
+actions run-script
+{
+    bash $(>)
+}

-pdf unordered.pdf : unordered.adoc ;
-explicit unordered.pdf ;
+# this globs after its sources are created
+rule delayed-glob ( project name : property-set : sources * )
+{
+  for local src in $(sources)
+  {
+    # the next line causes the source to be generated immediately
+    # and not later (which it normally would)
+    UPDATE_NOW [ $(src).actualize ] ;
+  }

-install pdf_ : unordered.pdf : <location>pdf ;
-explicit pdf_ ;
+  # we need to construct the path to the globbed directory;
+  # this path would be <current-project>/antora
+  local root = [ path.root html [ $(project).location ] ] ;
+  local files ;
+
+  # actual globbing happens here
+  for local file in [ path.glob-tree $(root) : * ]
+  {
+    # we have to skip directories, because our match expression accepts anything
+    if [ CHECK_IF_FILE $(file) ]
+    {
+      # we construct a list of targets to copy
+      files += [ virtual-target.from-file $(file:D=) : $(file:D) : $(project) ] ;
+    }
+  }
+
+  # we prepend empty usage requirements to the result
+  return [ property-set.empty ] $(files) ;
+}

 ###############################################################################
 alias boostdoc ;
 explicit boostdoc ;
-alias boostrelease : html_ ;
+alias boostrelease : install ;
 explicit boostrelease ;
@@ -0,0 +1,6 @@
+name: unordered
+version: ~
+title: Boost.Unordered
+nav:
+  - modules/ROOT/nav.adoc
+start_page: intro.adoc
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+set -ex
+
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+cd "$SCRIPT_DIR"
+
+npm ci
+npx antora unordered-playbook.yml
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+set -ex
+
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+cd "$SCRIPT_DIR"
+
+npm ci
+npx antora unordered-playbook.yml
+cp -f html/index.html html/unordered.html
--- a/Show More
+++ b/Show More