Add C++20 modules support and format btw.

.gitattributes

@@ -0,0 +1 @@
+* text=auto eol=lf

.github/workflows/linux.yaml

@@ -12,15 +12,46 @@ jobs:
       matrix:
         format: ["JSON", "AVRO", "BOOST_SERIALIZATION", "CAPNPROTO", "CBOR", "CEREAL", "FLEXBUFFERS", "MSGPACK", "PARQUET", "TOML", "UBJSON", "XML", "YAML", "benchmarks", "headers"]
         compiler: [llvm, gcc]
-        compiler-version: [11, 12, 13, 14, 16, 17, 18]
+        compiler-version: [11, 12, 13, 14, 15, 16, 17, 18, 19]
         cxx: [20, 23]
+        modules: ["OFF", "ON"]
         exclude:
-          - compiler: gcc 
+          - compiler: llvm
             compiler-version: 16
+            modules: "ON"
+          - compiler: llvm
+            compiler-version: 17
+            modules: "ON"
+          - compiler: llvm
+            compiler-version: 18
+            modules: "ON"
+          - compiler: gcc
+            compiler-version: 11
+            modules: "ON"
+          - compiler: gcc
+            compiler-version: 12
+            modules: "ON"
+          - compiler: gcc
+            compiler-version: 13
+            modules: "ON"
+          - compiler: gcc
+            compiler-version: 14
+            modules: "ON"
+          # Keep the matrix below GitHub's 256-job limit: GCC 14 covers headers,
+          # while GCC 16 covers the minimum supported module compiler.
+          - compiler: gcc
+            compiler-version: 16
+            modules: "OFF"
+          - compiler: gcc 
+            compiler-version: 15
           - compiler: gcc 
             compiler-version: 17
           - compiler: gcc 
             compiler-version: 18
+          - compiler: gcc
+            compiler-version: 19
+          - compiler: llvm
+            compiler-version: 15
           - compiler: llvm
             compiler-version: 11
           - compiler: llvm 
@@ -41,9 +72,9 @@ jobs:
           - compiler: llvm
             compiler-version: 17
             cxx: 23  
-    name: "${{ github.job }} (${{ matrix.format }}-C++${{ matrix.cxx }}-${{ matrix.compiler }}-${{ matrix.compiler-version }})"
+    name: "${{ github.job }} (${{ matrix.format }}-C++${{ matrix.cxx }}-${{ matrix.compiler }}-${{ matrix.compiler-version }}-modules-${{ matrix.modules }})"
     concurrency:
-      group: "linux-${{ github.ref }}-${{ github.job }}-${{ matrix.format }}-C++${{ matrix.cxx }}-${{ matrix.compiler }}-${{ matrix.compiler-version }}"
+      group: "linux-${{ github.ref }}-${{ github.job }}-${{ matrix.format }}-C++${{ matrix.cxx }}-${{ matrix.compiler }}-${{ matrix.compiler-version }}-modules-${{ matrix.modules }}"
       cancel-in-progress: true
     runs-on: ubuntu-24.04
     steps:
@@ -60,11 +91,28 @@ jobs:
             core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN || '');
       - name: Run vcpkg
         uses: lukka/run-vcpkg@v11
+      - name: Set up Python for benchmark tooling
+        if: matrix.format == 'benchmarks'
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+      - name: Use CMake 3.31.6 for the pinned benchmark port
+        if: matrix.format == 'benchmarks'
+        shell: bash
+        run: |
+          python -m pip install cmake==3.31.6
+          python -c "import cmake; print(cmake.CMAKE_BIN_DIR)" >> "$GITHUB_PATH"
       - name: Install dependencies
         run: |
           sudo apt update
           if [[ "${{ matrix.compiler-version }}" == 11 ]]; then
             sudo apt install -y ninja-build g++-11 
+          elif [[ "${{ matrix.compiler }}" == "gcc" && "${{ matrix.compiler-version }}" == 16 ]]; then
+            sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+            sudo apt update
+            sudo apt install -y ninja-build g++-16
+          elif [[ "${{ matrix.compiler }}" == "llvm" && "${{ matrix.compiler-version }}" == 19 ]]; then
+            sudo apt install -y ninja-build clang-19 clang-tools-19
           else
             sudo apt install -y ninja-build
           fi
@@ -79,13 +127,13 @@ jobs:
           fi
           $CXX --version
           if [[ "${{ matrix.format }}" == "JSON" ]]; then
-            cmake -S . -B build -G Ninja -DCMAKE_CXX_STANDARD=${{ matrix.cxx }} -DCMAKE_CXX_STANDARD=20 -DREFLECTCPP_BUILD_TESTS=ON -DCMAKE_BUILD_TYPE=Release
+            cmake -S . -B build -G Ninja -DCMAKE_CXX_STANDARD=${{ matrix.cxx }} -DREFLECTCPP_BUILD_MODULES=${{ matrix.modules }} -DREFLECTCPP_BUILD_TESTS=ON -DCMAKE_BUILD_TYPE=Release
           elif [[ "${{ matrix.format }}" == "benchmarks" ]]; then
-            cmake -S . -B build -G Ninja -DCMAKE_CXX_STANDARD=${{ matrix.cxx }} -DCMAKE_CXX_STANDARD=20 -DREFLECTCPP_BUILD_BENCHMARKS=ON -DREFLECTCPP_ALL_FORMATS=ON -DCMAKE_BUILD_TYPE=Release
+            cmake -S . -B build -G Ninja -DCMAKE_CXX_STANDARD=${{ matrix.cxx }} -DREFLECTCPP_BUILD_MODULES=${{ matrix.modules }} -DREFLECTCPP_BUILD_BENCHMARKS=ON -DREFLECTCPP_ALL_FORMATS=ON -DCMAKE_BUILD_TYPE=Release
           elif [[ "${{ matrix.format }}" == "headers" ]]; then
-            cmake -S . -B build -G Ninja -DCMAKE_CXX_STANDARD=${{ matrix.cxx }} -DCMAKE_CXX_STANDARD=20 -DREFLECTCPP_CHECK_HEADERS=ON -DCMAKE_BUILD_TYPE=Release
+            cmake -S . -B build -G Ninja -DCMAKE_CXX_STANDARD=${{ matrix.cxx }} -DREFLECTCPP_BUILD_MODULES=${{ matrix.modules }} -DREFLECTCPP_CHECK_HEADERS=ON -DCMAKE_BUILD_TYPE=Release
           else
-            cmake -S . -B build -G Ninja -DCMAKE_CXX_STANDARD=${{ matrix.cxx }} -DCMAKE_CXX_STANDARD=20 -DREFLECTCPP_BUILD_TESTS=ON -DREFLECTCPP_JSON=OFF -DREFLECTCPP_${{ matrix.format }}=ON -DCMAKE_BUILD_TYPE=Release
+            cmake -S . -B build -G Ninja -DCMAKE_CXX_STANDARD=${{ matrix.cxx }} -DREFLECTCPP_BUILD_MODULES=${{ matrix.modules }} -DREFLECTCPP_BUILD_TESTS=ON -DREFLECTCPP_JSON=OFF -DREFLECTCPP_${{ matrix.format }}=ON -DCMAKE_BUILD_TYPE=Release
           fi
           cmake --build build -j4
       - name: Run tests

.github/workflows/macos.yaml

@@ -31,6 +31,15 @@ jobs:
             core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN || '');
       - name: Run vcpkg
         uses: lukka/run-vcpkg@v11
+      - name: Set up Python for benchmark tooling
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+      - name: Use CMake 3.31.6 for the pinned benchmark port
+        shell: bash
+        run: |
+          python -m pip install cmake==3.31.6
+          python -c "import cmake; print(cmake.CMAKE_BIN_DIR)" >> "$GITHUB_PATH"
       - name: Install bison 
         run: brew install bison openssl@3
       - name: Install ninja 

.github/workflows/mkdocs-gh-pages.yaml

@@ -27,17 +27,24 @@ jobs:
           version: 1.12.0
 
       - name: Set git credentials
+        if: github.repository == 'getml/reflect-cpp'
         run: |
           git config --global user.name "${{ github.actor }}"
           git config --global user.email "${{ github.actor }}@users.noreply.github.com"
 
       - name: Fetch latest commit from gh-pages
+        if: github.repository == 'getml/reflect-cpp'
         run: |
           git fetch origin gh-pages --depth=1
 
       - name: Deploy MkDocs documentation
+        if: github.repository == 'getml/reflect-cpp'
         run: hatch run default:mkdocs gh-deploy
 
+      - name: Build MkDocs documentation on forks
+        if: github.repository != 'getml/reflect-cpp'
+        run: hatch run default:mkdocs build
+
 
 
 

.github/workflows/windows.yaml

@@ -30,6 +30,21 @@ jobs:
             core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN || '');
       - uses: ilammy/msvc-dev-cmd@v1
       - uses: lukka/run-vcpkg@v11
+      - name: Set up Python for benchmark tooling
+        if: matrix.format == 'benchmarks'
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+      - name: Use CMake 3.31.6 for the pinned benchmark port
+        if: matrix.format == 'benchmarks'
+        shell: bash
+        run: |
+          python -m pip install cmake==3.31.6
+          python -c "import cmake; print(cmake.CMAKE_BIN_DIR)" >> "$GITHUB_PATH"
+      - name: Add vcpkg runtime DLLs to PATH
+        # Some ports expose UNKNOWN imported targets, so TARGET_RUNTIME_DLLS
+        # cannot stage their DLLs for GoogleTest discovery during the build.
+        run: '"${{ github.workspace }}\build\vcpkg_installed\x64-windows\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append'
       - name: Compile benchmarks 
         if: matrix.format == 'benchmarks' 
         run: |
@@ -94,6 +109,8 @@ jobs:
             core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN || '');
       - uses: ilammy/msvc-dev-cmd@v1
       - uses: lukka/run-vcpkg@v11
+      - name: Add vcpkg runtime DLLs to PATH
+        run: '"${{ github.workspace }}\build\vcpkg_installed\x64-windows\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append'
       - name: Compile tests (JSON)
         if: matrix.format == 'JSON'
         run: |