Merge branch 'master' into sf-lto

* Remove all core-CH left-overs

* Fix formatting

* Update CHANGELOG.md

.clang-tidy

@@ -13,6 +13,10 @@ Checks: >
     -bugprone-forward-declaration-namespace,
     -bugprone-sizeof-expression,
     -bugprone-throw-keyword-missing,
+    -bugprone-chained-comparison,
+    -bugprone-incorrect-enable-if,
+    -bugprone-switch-missing-default-case,
+    -bugprone-empty-catch,
     -clang-analyzer-*,
     -clang-diagnostic-deprecated-declarations,
     -clang-diagnostic-constant-conversion,
@@ -49,11 +53,13 @@ Checks: >
     -misc-misplaced-const,
     -misc-definitions-in-headers,
     -misc-unused-parameters,
+    -misc-include-cleaner,
     modernize-concat-nested-namespaces,
     modernize-use-using,
     performance-*,
-    -performance-noexcept-move-constructor,
     -performance-no-int-to-ptr,
+    -performance-enum-size,
+    -performance-avoid-endl,
     readability-*,
     -readability-avoid-const-params-in-decls,
     -readability-braces-around-statements,
@@ -82,6 +88,10 @@ Checks: >
     -readability-make-member-function-const,
     -readability-redundant-string-init,
     -readability-non-const-parameter,
+    -readability-redundant-inline-specifier,
+    -readability-avoid-nested-conditional-operator,
+    -readability-avoid-return-with-void-value,
+    -readability-redundant-casting,
     -readability-static-accessed-through-instance
     
 WarningsAsErrors: '*'

.github/workflows/osrm-backend.yml

@@ -15,10 +15,13 @@ env:
   CCACHE_TEMPDIR: /tmp/.ccache-temp
   CCACHE_COMPRESS: 1
   CASHER_TIME_OUT: 599 # one second less than 10m to avoid 10m timeout error: https://github.com/Project-OSRM/osrm-backend/issues/2742
-  CCACHE_VERSION: 3.3.1
   CMAKE_VERSION: 3.21.2
   ENABLE_NODE_BINDINGS: "ON"
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   windows-release-node:
     needs: format-taginfo-docs
@@ -26,13 +29,12 @@ jobs:
     continue-on-error: false
     env:
       BUILD_TYPE: Release
-      ENABLE_APPLE_SILICON: "OFF"
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: pip install "conan<2.0.0"
     - run: conan --version
     - run: cmake --version
-    - uses: actions/setup-node@v3
+    - uses: actions/setup-node@v4
       with:
         node-version: 18
     - run: node --version
@@ -44,15 +46,32 @@ jobs:
         echo PUBLISH=$([[ "${GITHUB_REF:-}" == "refs/tags/v${PACKAGE_JSON_VERSION}" ]] && echo "On" || echo "Off") >> $GITHUB_ENV
     - run: npm install --ignore-scripts
     - run: npm link --ignore-scripts
-    - uses: microsoft/setup-msbuild@v1.1
     - name: Build
-      run: |
-        .\scripts\ci\windows-build.bat
-    - name: Run node tests
       shell: bash
       run: |
-        ./lib/binding/osrm-datastore.exe test/data/ch/monaco.osrm
+        mkdir build
-        node test/nodejs/index.js
+        cd build
+        cmake -DCMAKE_BUILD_TYPE=Release -DENABLE_CONAN=ON -DENABLE_NODE_BINDINGS=ON ..
+        cmake --build . --config Release
+        
+    # TODO: MSVC goes out of memory when building our tests
+    # - name: Run tests
+    #   shell: bash
+    #   run: |
+    #     cd build
+    #     cmake --build . --config Release --target tests
+    #     # TODO: run tests
+    # - name: Run node tests
+    #   shell: bash
+    #   run: |
+    #     ./lib/binding/osrm-extract.exe -p profiles/car.lua test/data/monaco.osm.pbf
+
+    #     mkdir -p test/data/ch
+    #     cp test/data/monaco.osrm* test/data/ch/
+    #     ./lib/binding/osrm-contract.exe test/data/ch/monaco.osrm
+
+    #     ./lib/binding/osrm-datastore.exe test/data/ch/monaco.osrm
+    #     node test/nodejs/index.js
     - name: Build Node package
       shell: bash
       run: ./scripts/ci/node_package.sh
@@ -71,15 +90,15 @@ jobs:
         token: ${{ secrets.GITHUB_TOKEN }}
 
   format-taginfo-docs:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Use Node.js
-      uses: actions/setup-node@v3
+      uses: actions/setup-node@v4
       with:
         node-version: 18
     - name: Enable Node.js cache
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ~/.npm
         key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
@@ -88,7 +107,7 @@ jobs:
     - name: Prepare environment
       run: |
         npm ci --ignore-scripts
-        clang-format-10 --version
+        clang-format-15 --version
     - name: Run checks
       run: |
         ./scripts/check_taginfo.py taginfo.json profiles/car.lua
@@ -103,9 +122,9 @@ jobs:
     continue-on-error: false
     steps:
       - name: Check out the repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Enable osm.pbf cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: berlin-latest.osm.pbf
           key: v1-berlin-osm-pbf
@@ -145,183 +164,178 @@ jobs:
     strategy:
       matrix:
         include:
-          - name: gcc-9-debug-cov
+          # - name: gcc-13-debug-cov
-            continue-on-error: false
+          #   continue-on-error: false
-            node: 18
+          #   node: 20
-            runs-on: ubuntu-20.04
+          #   runs-on: ubuntu-24.04
-            BUILD_TOOLS: ON
+          #   BUILD_TOOLS: ON
-            BUILD_TYPE: Debug
+          #   BUILD_TYPE: Debug
-            CCOMPILER: gcc-9
+          #   CCOMPILER: gcc-13
-            CUCUMBER_TIMEOUT: 20000
+          #   CUCUMBER_TIMEOUT: 20000
-            CXXCOMPILER: g++-9
+          #   CXXCOMPILER: g++-13
-            ENABLE_COVERAGE: ON
+          #   ENABLE_COVERAGE: ON
 
-          - name: gcc-9-debug-asan-ubsan
+          # - name: clang-15-debug-asan-ubsan
-            continue-on-error: false
+          #   continue-on-error: false
-            node: 18
+          #   node: 20
-            runs-on: ubuntu-20.04
+          #   runs-on: ubuntu-22.04
-            BUILD_TOOLS: ON
+          #   BUILD_TOOLS: ON
-            BUILD_TYPE: Debug
+          #   BUILD_TYPE: Debug
-            CCOMPILER: gcc-9
+          #   CCOMPILER: clang-15
-            CUCUMBER_TIMEOUT: 20000
+          #   CUCUMBER_TIMEOUT: 20000
-            CXXCOMPILER: g++-9
+          #   CXXCOMPILER: clang++-15
-            ENABLE_SANITIZER: ON
+          #   ENABLE_SANITIZER: ON
-            TARGET_ARCH: x86_64-asan-ubsan
+          #   TARGET_ARCH: x86_64-asan-ubsan
-            OSRM_CONNECTION_RETRIES: 10
+          #   OSRM_CONNECTION_RETRIES: 10
-            OSRM_CONNECTION_EXP_BACKOFF_COEF: 1.5
+          #   OSRM_CONNECTION_EXP_BACKOFF_COEF: 1.5
 
-          - name: clang-6.0-debug
+          # - name: clang-15-release
-            continue-on-error: false
+          #   continue-on-error: false
-            node: 18
+          #   node: 18
-            runs-on: ubuntu-20.04
+          #   runs-on: ubuntu-22.04
-            BUILD_TOOLS: ON
+          #   BUILD_TOOLS: ON
-            BUILD_TYPE: Debug
+          #   BUILD_TYPE: Release
-            CCOMPILER: clang-6.0
+          #   CCOMPILER: clang-15
-            CXXCOMPILER: clang++-6.0
+          #   CXXCOMPILER: clang++-15
-            CUCUMBER_TIMEOUT: 60000
+          #   CUCUMBER_TIMEOUT: 60000
 
-          - name: clang-15.0-debug-clang-tidy
+          # - name: clang-15-debug
-            continue-on-error: false
+          #   continue-on-error: false
-            node: 18
+          #   node: 18
-            runs-on: ubuntu-22.04
+          #   runs-on: ubuntu-22.04
-            BUILD_TOOLS: ON
+          #   BUILD_TOOLS: ON
-            BUILD_TYPE: Debug
+          #   BUILD_TYPE: Debug
-            CCOMPILER: clang-15
+          #   CCOMPILER: clang-15
-            CXXCOMPILER: clang++-15
+          #   CXXCOMPILER: clang++-15
-            CUCUMBER_TIMEOUT: 60000
+          #   CUCUMBER_TIMEOUT: 60000
-            ENABLE_CLANG_TIDY: ON
 
-          - name: conan-linux-debug-asan-ubsan
+          # - name: clang-18-debug-clang-tidy
+          #   continue-on-error: false
+          #   node: 18
+          #   runs-on: ubuntu-24.04
+          #   BUILD_TOOLS: ON
+          #   BUILD_TYPE: Debug
+          #   CCOMPILER: clang-18
+          #   CXXCOMPILER: clang++-18
+          #   CUCUMBER_TIMEOUT: 60000
+          #   ENABLE_CLANG_TIDY: ON
+
+          # - name: clang-14-release
+          #   continue-on-error: false
+          #   node: 18
+          #   runs-on: ubuntu-22.04
+          #   BUILD_TOOLS: ON
+          #   BUILD_TYPE: Release
+          #   CCOMPILER: clang-14
+          #   CXXCOMPILER: clang++-14
+          #   CUCUMBER_TIMEOUT: 60000
+
+          # - name: clang-13-release
+          #   continue-on-error: false
+          #   node: 18
+          #   runs-on: ubuntu-22.04
+          #   BUILD_TOOLS: ON
+          #   BUILD_TYPE: Release
+          #   CCOMPILER: clang-13
+          #   CXXCOMPILER: clang++-13
+          #   CUCUMBER_TIMEOUT: 60000
+
+          # - name: conan-linux-debug-asan-ubsan
+          #   continue-on-error: false
+          #   node: 18
+          #   runs-on: ubuntu-22.04
+          #   BUILD_TOOLS: ON
+          #   BUILD_TYPE: Release
+          #   CCOMPILER: clang-15
+          #   CXXCOMPILER: clang++-15
+          #   ENABLE_CONAN: ON
+          #   ENABLE_SANITIZER: ON
+
+          # - name: conan-linux-release
+          #   continue-on-error: false
+          #   node: 18
+          #   runs-on: ubuntu-22.04
+          #   BUILD_TOOLS: ON
+          #   BUILD_TYPE: Release
+          #   CCOMPILER: clang-15
+          #   CXXCOMPILER: clang++-15
+          #   ENABLE_CONAN: ON
+
+          - name: gcc-14-release
             continue-on-error: false
-            node: 18
+            node: 20
-            runs-on: ubuntu-20.04
+            runs-on: ubuntu-24.04
             BUILD_TOOLS: ON
             BUILD_TYPE: Release
-            CCOMPILER: clang-11
+            CCOMPILER: gcc-14
-            CXXCOMPILER: clang++-11
+            CXXCOMPILER: g++-14
-            ENABLE_CONAN: ON
-            ENABLE_SANITIZER: ON
-
-          - name: conan-linux-release
-            continue-on-error: false
-            node: 18
-            runs-on: ubuntu-20.04
-            BUILD_TOOLS: ON
-            BUILD_TYPE: Release
-            CCOMPILER: clang-6.0
-            CXXCOMPILER: clang++-6.0
-            ENABLE_CONAN: ON
-
-          - name: gcc-12-release
-            continue-on-error: false
-            node: 18
-            runs-on: ubuntu-22.04
-            BUILD_TOOLS: ON
-            BUILD_TYPE: Release
-            CCOMPILER: gcc-12
-            CXXCOMPILER: g++-12
-            ENABLE_BENCHMARKS: ON
             CXXFLAGS: '-Wno-array-bounds -Wno-uninitialized'
 
-          - name: gcc-11-release
+          # - name: gcc-13-release
-            continue-on-error: false
+          #   continue-on-error: false
-            node: 18
+          #   node: 20
-            runs-on: ubuntu-20.04
+          #   runs-on: ubuntu-24.04
-            BUILD_TOOLS: ON
+          #   BUILD_TOOLS: ON
-            BUILD_TYPE: Release
+          #   BUILD_TYPE: Release
-            CCOMPILER: gcc-11
+          #   CCOMPILER: gcc-13
-            CXXCOMPILER: g++-11
+          #   CXXCOMPILER: g++-13
-            ENABLE_BENCHMARKS: ON
+          #   CXXFLAGS: '-Wno-array-bounds -Wno-uninitialized'
 
-          - name: gcc-10-release
+          # - name: gcc-12-release
-            continue-on-error: false
+          #   continue-on-error: false
-            node: 18
+          #   node: 20
-            runs-on: ubuntu-20.04
+          #   runs-on: ubuntu-22.04
-            BUILD_TOOLS: ON
+          #   BUILD_TOOLS: ON
-            BUILD_TYPE: Release
+          #   BUILD_TYPE: Release
-            CCOMPILER: gcc-10
+          #   CCOMPILER: gcc-12
-            CXXCOMPILER: g++-10
+          #   CXXCOMPILER: g++-12
+          #   CXXFLAGS: '-Wno-array-bounds -Wno-uninitialized'
 
-          - name: gcc-9-release
+          # - name: conan-linux-release-node
-            continue-on-error: false
+          #   build_node_package: true
-            node: 18
+          #   continue-on-error: false
-            runs-on: ubuntu-20.04
+          #   node: 20
-            BUILD_TOOLS: ON
+          #   runs-on: ubuntu-22.04
-            BUILD_TYPE: Release
+          #   BUILD_TYPE: Release
-            CCOMPILER: gcc-9
+          #   CCOMPILER: clang-13
-            CXXCOMPILER: g++-9
+          #   CXXCOMPILER: clang++-13
-            CXXFLAGS: -Wno-cast-function-type
+          #   ENABLE_CONAN: ON
+          #   NODE_PACKAGE_TESTS_ONLY: ON
 
-          - name: gcc-9-conan-release-i686
+          # - name: conan-linux-debug-node
-            continue-on-error: false
+          #   build_node_package: true
-            node: 18
+          #   continue-on-error: false
-            runs-on: ubuntu-20.04
+          #   node: 20
-            BUILD_TOOLS: ON
+          #   runs-on: ubuntu-22.04
-            BUILD_TYPE: Release
+          #   BUILD_TYPE: Debug
-            CCOMPILER: gcc-9
+          #   CCOMPILER: clang-13
-            CFLAGS: "-m32 -msse2 -mfpmath=sse"
+          #   CXXCOMPILER: clang++-13
-            CXXCOMPILER: g++-9
+          #   ENABLE_CONAN: ON
-            CXXFLAGS: "-m32 -msse2 -mfpmath=sse"
+          #   NODE_PACKAGE_TESTS_ONLY: ON
-            TARGET_ARCH: i686
-            ENABLE_CONAN: ON
 
-          - name: gcc-8-release
+          # - name: conan-macos-x64-release-node
-            continue-on-error: false
+          #   build_node_package: true
-            node: 18
+          #   continue-on-error: true
-            runs-on: ubuntu-20.04
+          #   node: 20
-            BUILD_TOOLS: ON
+          #   runs-on: macos-13 # x86_64
-            BUILD_TYPE: Release
+          #   BUILD_TYPE: Release
-            CCOMPILER: gcc-8
+          #   CCOMPILER: clang
-            CXXCOMPILER: g++-8
+          #   CXXCOMPILER: clang++
-            CXXFLAGS: -Wno-cast-function-type
+          #   CUCUMBER_TIMEOUT: 60000
-
+          #   ENABLE_ASSERTIONS: ON
-          - name: conan-linux-release-node
+          #   ENABLE_CONAN: ON
-            build_node_package: true
-            continue-on-error: false
-            node: 20
-            runs-on: ubuntu-20.04
-            BUILD_TYPE: Release
-            CCOMPILER: clang-6.0
-            CXXCOMPILER: clang++-6.0
-            ENABLE_CONAN: ON
-            NODE_PACKAGE_TESTS_ONLY: ON
-
-          - name: conan-linux-debug-node
-            build_node_package: true
-            continue-on-error: false
-            node: 20
-            runs-on: ubuntu-20.04
-            BUILD_TYPE: Debug
-            CCOMPILER: clang-6.0
-            CXXCOMPILER: clang++-6.0
-            ENABLE_CONAN: ON
-            NODE_PACKAGE_TESTS_ONLY: ON
-
-          - name: conan-macos-x64-release-node
-            build_node_package: true
-            continue-on-error: true
-            node: 20
-            runs-on: macos-11
-            BUILD_TYPE: Release
-            CCOMPILER: clang
-            CXXCOMPILER: clang++
-            CUCUMBER_TIMEOUT: 60000
-            ENABLE_ASSERTIONS: ON
-            ENABLE_CONAN: ON
-
-          - name: conan-macos-arm64-release-node
-            build_node_package: true
-            continue-on-error: true
-            node: 20
-            runs-on: macos-11
-            BUILD_TYPE: Release
-            CCOMPILER: clang
-            CXXCOMPILER: clang++
-            CUCUMBER_TIMEOUT: 60000
-            ENABLE_ASSERTIONS: ON
-            ENABLE_CONAN: ON
-            ENABLE_APPLE_SILICON: ON
 
+          # - name: conan-macos-arm64-release-node
+          #   build_node_package: true
+          #   continue-on-error: true
+          #   node: 20
+          #   runs-on: macos-14 # arm64 
+          #   BUILD_TYPE: Release
+          #   CCOMPILER: clang
+          #   CXXCOMPILER: clang++
+          #   CUCUMBER_TIMEOUT: 60000
+          #   ENABLE_ASSERTIONS: ON
+          #   ENABLE_CONAN: ON
     name: ${{ matrix.name}}
     continue-on-error: ${{ matrix.continue-on-error }}
     runs-on: ${{ matrix.runs-on }}
@@ -340,48 +354,50 @@ jobs:
       ENABLE_CONAN: ${{ matrix.ENABLE_CONAN }}
       ENABLE_SANITIZER: ${{ matrix.ENABLE_SANITIZER }}
       NODE_PACKAGE_TESTS_ONLY: ${{ matrix.NODE_PACKAGE_TESTS_ONLY }}
-      ENABLE_APPLE_SILICON: ${{ matrix.ENABLE_APPLE_SILICON }}
       TARGET_ARCH: ${{ matrix.TARGET_ARCH }}
       OSRM_CONNECTION_RETRIES: ${{ matrix.OSRM_CONNECTION_RETRIES }}
       OSRM_CONNECTION_EXP_BACKOFF_COEF: ${{ matrix.OSRM_CONNECTION_EXP_BACKOFF_COEF }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
-
+    - name: Build machine architecture
+      run: uname -m
     - name: Use Node.js
-      uses: actions/setup-node@v3
+      uses: actions/setup-node@v4
       with:
         node-version: ${{ matrix.node }}
     - name: Enable Node.js cache
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ~/.npm
         key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
         restore-keys: |
           ${{ runner.os }}-node-
     - name: Enable compiler cache
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ~/.ccache
         key: ccache-${{ matrix.name }}-${{ github.sha }}
         restore-keys: |
           ccache-${{ matrix.name }}-
     - name: Enable Conan cache
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ~/.conan
-        key: v7-conan-${{ matrix.name }}-${{ github.sha }}
+        key: v9-conan-${{ matrix.name }}-${{ github.sha }}
         restore-keys: |
-          v7-conan-${{ matrix.name }}-
+          v9-conan-${{ matrix.name }}-
     - name: Enable test cache
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ${{github.workspace}}/test/cache
         key: v4-test-${{ matrix.name }}-${{ github.sha }}
         restore-keys: |
           v4-test-${{ matrix.name }}-
-
     - name: Prepare environment
       run: |
+        echo "CCACHE_DIR=$HOME/.ccache" >> $GITHUB_ENV
+        mkdir -p $HOME/.ccache
+
         PACKAGE_JSON_VERSION=$(node -e "console.log(require('./package.json').version)")
         echo PUBLISH=$([[ "${GITHUB_REF:-}" == "refs/tags/v${PACKAGE_JSON_VERSION}" ]] && echo "On" || echo "Off") >> $GITHUB_ENV
         echo "OSRM_INSTALL_DIR=${GITHUB_WORKSPACE}/install-osrm" >> $GITHUB_ENV
@@ -390,6 +406,7 @@ jobs:
           # We can only set this after checkout once we know the workspace directory
           echo "LSAN_OPTIONS=print_suppressions=0:suppressions=${GITHUB_WORKSPACE}/scripts/ci/leaksanitizer.conf" >> $GITHUB_ENV
           echo "UBSAN_OPTIONS=symbolize=1:halt_on_error=1:print_stacktrace=1:suppressions=${GITHUB_WORKSPACE}/scripts/ci/undefinedsanitizer.conf" >> $GITHUB_ENV
+          echo "ASAN_OPTIONS=print_suppressions=0:suppressions=${GITHUB_WORKSPACE}/scripts/ci/addresssanitizer.conf" >> $GITHUB_ENV
         fi
 
         if [[ "${RUNNER_OS}" == "Linux" ]]; then
@@ -397,10 +414,39 @@ jobs:
         elif [[ "${RUNNER_OS}" == "macOS" ]]; then
           echo "JOBS=$((`sysctl -n hw.ncpu` + 1))" >>  $GITHUB_ENV
         fi
+    # See: https://github.com/actions/toolkit/issues/946#issuecomment-1590016041
+    # We need it to be able to access system folders while restoring cached Boost below
+    - name: Give tar root ownership 
+      if: runner.os == 'Linux' && matrix.ENABLE_CONAN != 'ON'
+      run: sudo chown root /bin/tar && sudo chmod u+s /bin/tar
+    - name: Cache Boost
+      if: runner.os == 'Linux' && matrix.ENABLE_CONAN != 'ON'
+      id: cache-boost
+      uses: actions/cache@v4
+      with:
+        path: |
+          /usr/local/include/boost
+          /usr/local/lib/libboost*
+        key: v1-boost-${{ runner.os }}-${{ runner.arch }}-${{ matrix.runs-on }}
+        restore-keys: |
+          v1-boost-${{ runner.os }}-${{ runner.arch }}-${{ matrix.runs-on }}
 
+    - name: Install Boost
+      if: steps.cache-boost.outputs.cache-hit != 'true' && runner.os == 'Linux' && matrix.ENABLE_CONAN != 'ON'
+      run: |
+        BOOST_VERSION="1.85.0"
+        BOOST_VERSION_UNDERSCORE="${BOOST_VERSION//./_}"
+        wget -q https://boostorg.jfrog.io/artifactory/main/release/${BOOST_VERSION}/source/boost_${BOOST_VERSION_UNDERSCORE}.tar.gz
+        tar xzf boost_${BOOST_VERSION_UNDERSCORE}.tar.gz
+        cd boost_${BOOST_VERSION_UNDERSCORE}
+        sudo ./bootstrap.sh
+        sudo ./b2 install
+        cd ..
+        sudo rm -rf boost_${BOOST_VERSION_UNDERSCORE}*
+    
     - name: Install dev dependencies
       run: |
-        python3 -m pip install "conan<2.0.0"
+        python3 -m pip install "conan<2.0.0" || python3 -m pip install "conan<2.0.0" --break-system-packages
 
         # workaround for issue that GitHub Actions seems to not adding it to PATH after https://github.com/actions/runner-images/pull/6499
         # and that's why CI cannot find conan executable installed above
@@ -415,34 +461,20 @@ jobs:
           brew install ccache
         fi
 
-        # clang
-        if [[ "${CCOMPILER}" == "clang-6.0" ]]; then
-          sudo apt-get update -y && sudo apt-get install clang++-6
-        elif [[ "${CCOMPILER}" == "clang-15" ]]; then
-          wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-          sudo apt-get update -y && sudo apt-get install software-properties-common
-          sudo add-apt-repository 'deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-15 main'
-          sudo apt-get update -y && sudo apt-get install clang++-15 clang-tidy-15
-          sudo update-alternatives --install /usr/bin/clang-tidy clang-tidy /usr/bin/clang-tidy-15 100000
-        fi
-
         # Linux dev packages
-        if [ "${TARGET_ARCH}" != "i686" ] && [ "${ENABLE_CONAN}" != "ON" ]; then
+        if [ "${ENABLE_CONAN}" != "ON" ]; then
           sudo apt-get update -y
-          sudo apt-get install -y libbz2-dev libxml2-dev libzip-dev liblua5.2-dev libboost-all-dev
+          sudo apt-get install -y libbz2-dev libxml2-dev libzip-dev liblua5.2-dev
           if [[ "${CCOMPILER}" != clang-* ]]; then
             sudo apt-get install -y ${CXXCOMPILER}
           fi
           if [[ "${ENABLE_COVERAGE}" == "ON" ]]; then
             sudo apt-get install -y lcov
           fi
-        elif [[ $TARGET_ARCH == "i686" ]]; then
-          source ./scripts/ci/before_install.${TARGET_ARCH}.sh
-          echo "PKG_CONFIG_PATH=/usr/lib/i386-linux-gnu/pkgconfig:${PKG_CONFIG_PATH}" >> $GITHUB_ENV
         fi
 
         # TBB
-        TBB_VERSION=2021.3.0
+        TBB_VERSION=2021.12.0
         if [[ "${RUNNER_OS}" == "Linux" ]]; then
           TBB_URL="https://github.com/oneapi-src/oneTBB/releases/download/v${TBB_VERSION}/oneapi-tbb-${TBB_VERSION}-lin.tgz"
         elif [[ "${RUNNER_OS}" == "macOS" ]]; then
@@ -473,18 +505,8 @@ jobs:
       run: |
         echo "Using ${JOBS} jobs"
         pushd ${OSRM_BUILD_DIR}
-
+        
-        # handle Apple Silicon cross compilation
+        ccache --zero-stats
-        if [[ "${ENABLE_APPLE_SILICON}" == "ON" ]]; then
-          ARCH=arm64
-          TARGET="${ARCH}-apple-darwin"
-          CFLAGS="$CFLAGS --target=$TARGET"
-          CXXFLAGS="$CXXFLAGS --target=$TARGET"
-          APPLE_SILICON_FLAGS=(-DCMAKE_C_COMPILER_TARGET="$TARGET" -DCMAKE_CXX_COMPILER_TARGET="$TARGET" -DCMAKE_SYSTEM_PROCESSOR="${ARCH}" -DCMAKE_SYSTEM_NAME="Darwin" -DCMAKE_C_FLAGS="$CFLAGS" -DCMAKE_CXX_FLAGS="$CXXFLAGS")
-        else
-          APPLE_SILICON_FLAGS=()
-        fi
-
         cmake .. -DCMAKE_BUILD_TYPE=${BUILD_TYPE} \
                  -DENABLE_CONAN=${ENABLE_CONAN:-OFF} \
                  -DENABLE_ASSERTIONS=${ENABLE_ASSERTIONS:-OFF} \
@@ -495,15 +517,13 @@ jobs:
                  -DENABLE_SANITIZER=${ENABLE_SANITIZER:-OFF} \
                  -DBUILD_TOOLS=${BUILD_TOOLS:-OFF} \
                  -DENABLE_CCACHE=ON \
-                 -DCMAKE_INSTALL_PREFIX=${OSRM_INSTALL_DIR} \
+                 -DCMAKE_INSTALL_PREFIX=${OSRM_INSTALL_DIR}
-                 "${APPLE_SILICON_FLAGS[@]}"
-
         make --jobs=${JOBS}
 
-        if [[ "${NODE_PACKAGE_TESTS_ONLY}" != "ON" && "${ENABLE_APPLE_SILICON}" != "ON" ]]; then
+        if [[ "${NODE_PACKAGE_TESTS_ONLY}" != "ON" ]]; then
           make tests --jobs=${JOBS}
           make benchmarks --jobs=${JOBS}
-          ccache -s
+
           sudo make install
           if [[ "${RUNNER_OS}" == "Linux" ]]; then
             echo "LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${OSRM_INSTALL_DIR}/lib" >> $GITHUB_ENV
@@ -512,14 +532,14 @@ jobs:
         fi
         popd
     - name: Build example
-      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY != 'ON' && matrix.ENABLE_APPLE_SILICON != 'ON' }}
+      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY != 'ON' }}
       run: |
         mkdir example/build && pushd example/build
         cmake .. -DCMAKE_BUILD_TYPE=${BUILD_TYPE}
         make --jobs=${JOBS}
         popd
     - name: Run all tests
-      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY != 'ON' && matrix.ENABLE_APPLE_SILICON != 'ON' }}
+      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY != 'ON' }}
       run: |
         make -C test/data benchmark
 
@@ -530,86 +550,66 @@ jobs:
         # All tests assume to be run from the build directory
         pushd ${OSRM_BUILD_DIR}
         for i in ./unit_tests/*-tests ; do echo Running $i ; $i ; done
-        if [ -z "${ENABLE_SANITIZER}" ] && [ "$TARGET_ARCH" != "i686" ]; then
+        if [ -z "${ENABLE_SANITIZER}" ]; then
           npm run nodejs-tests
         fi
         popd
         npm test
-    - name: Run benchmarks
-      if: ${{ matrix.ENABLE_BENCHMARKS == 'ON' }}
-      run: |
-        pushd ${OSRM_BUILD_DIR}
-        make --jobs=${JOBS} benchmarks
-        ./src/benchmarks/alias-bench
-        ./src/benchmarks/json-render-bench ../src/benchmarks/portugal_to_korea.json
-        ./src/benchmarks/match-bench ../test/data/ch/monaco.osrm
-        ./src/benchmarks/packedvector-bench
-        ./src/benchmarks/rtree-bench ../test/data/monaco.osrm.ramIndex ../test/data/monaco.osrm.fileIndex ../test/data/monaco.osrm.nbg_nodes
-        popd
 
     - name: Use Node 18
-      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY == 'ON' && matrix.ENABLE_APPLE_SILICON != 'ON' }}
+      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY == 'ON' }}
-      uses: actions/setup-node@v3
+      uses: actions/setup-node@v4
       with:
         node-version: 18
     - name: Run Node package tests on Node 18
-      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY == 'ON' && matrix.ENABLE_APPLE_SILICON != 'ON' }}
+      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY == 'ON' }}
       run: |
         node --version
         npm run nodejs-tests
     - name: Use Node 20
-      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY == 'ON' && matrix.ENABLE_APPLE_SILICON != 'ON' }}
+      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY == 'ON' }}
-      uses: actions/setup-node@v3
+      uses: actions/setup-node@v4
       with:
         node-version: 20
     - name: Run Node package tests on Node 20
-      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY == 'ON' && matrix.ENABLE_APPLE_SILICON != 'ON' }}
+      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY == 'ON' }}
       run: |
         node --version
         npm run nodejs-tests
     - name: Use Node latest
-      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY == 'ON' && matrix.ENABLE_APPLE_SILICON != 'ON' }}
+      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY == 'ON' }}
-      uses: actions/setup-node@v3
+      uses: actions/setup-node@v4
       with:
         node-version: latest
     - name: Run Node package tests on Node-latest
-      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY == 'ON' && matrix.ENABLE_APPLE_SILICON != 'ON' }}
+      if: ${{ matrix.NODE_PACKAGE_TESTS_ONLY == 'ON' }}
       run: |
         node --version
         npm run nodejs-tests
 
     - name: Upload test logs
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       if: failure()
       with:
         name: logs
         path: test/logs/
 
-    - name: Generate code coverage
+    # - name: Generate code coverage
-      if: ${{ matrix.ENABLE_COVERAGE == 'ON' }}
+    #   if: ${{ matrix.ENABLE_COVERAGE == 'ON' }}
-      run: |
+    #   run: |
-        lcov --directory . --capture --output-file coverage.info # capture coverage info
+    #     lcov --directory . --capture --output-file coverage.info # capture coverage info
-        lcov --remove coverage.info '/usr/*' --output-file coverage.info # filter out system
+    #     lcov --remove coverage.info '/usr/*' --output-file coverage.info # filter out system
-        lcov --list coverage.info #debug info
+    #     lcov --list coverage.info #debug info
     
     # # Uploading report to CodeCov
     # - name: Upload code coverage
     #   if: ${{ matrix.ENABLE_COVERAGE == 'ON' }}
-    #   uses: codecov/codecov-action@v1
+    #   uses: codecov/codecov-action@v4
     #   with:
     #     files: coverage.info
     #     name: codecov-osrm-backend
     #     fail_ci_if_error: true
     #     verbose: true
-    - name: Check Apple Silicon binary
-      if: ${{  matrix.ENABLE_APPLE_SILICON == 'ON' }}
-      run: |
-        ARCH=$(file ./lib/binding/node_osrm.node | awk '{printf $NF}')
-        if [[ "$ARCH" != "arm64" ]]; then
-          file ./lib/binding/node_osrm.node
-          >&2 echo "Wrong architecture!"
-          exit 1
-        fi
     - name: Build Node package
       if: ${{ matrix.build_node_package }}
       run: ./scripts/ci/node_package.sh
@@ -626,9 +626,113 @@ jobs:
         omitNameDuringUpdate: true
         replacesArtifacts: true
         token: ${{ secrets.GITHUB_TOKEN }}
+    - name: Show CCache statistics
+      run: |
+        ccache -p
+        ccache -s
+
+  benchmarks:
+    if: github.event_name == 'pull_request'
+    needs: [format-taginfo-docs]
+    runs-on: ubuntu-22.04
+    env:
+      CCOMPILER: gcc-12 #clang-13
+      CXXCOMPILER: g++-12 #clang++-13
+      CC: gcc-12 #clang-13
+      CXX: g++-12 #clang++-13
+      CXXFLAGS: '-Wno-array-bounds -Wno-uninitialized'
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      PR_NUMBER: ${{ github.event.pull_request.number }}
+      GITHUB_REPOSITORY: ${{ github.repository }}
+      RUN_BIG_BENCHMARK: ${{ contains(github.event.pull_request.labels.*.name, 'Performance') }}
+    steps: 
+      - name: Enable data.osm.pbf cache
+        if: ${{ ! env.RUN_BIG_BENCHMARK }}        
+        uses: actions/cache@v4
+        with:
+          path: ~/data.osm.pbf
+          key: v1-data-osm-pbf
+          restore-keys: |
+            v1-data-osm-pbf
+      - name: Enable compiler cache
+        uses: actions/cache@v4
+        with:
+          path: ~/.ccache
+          key: v1-ccache-benchmarks-${{ github.sha }}
+          restore-keys: |
+            v1-ccache-benchmarks-
+      - name: Enable Conan cache
+        uses: actions/cache@v4
+        with:
+          path: ~/.conan
+          key: v1-conan-benchmarks-${{ github.sha }}
+          restore-keys: |
+            v1-conan-benchmarks-
+      - name: Checkout PR Branch
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.head_ref }}
+          path: pr
+      - name: Install dependencies
+        run: | 
+          python3 -m pip install "conan<2.0.0" "requests==2.31.0" "numpy==1.26.4" #--break-system-packages
+          sudo apt-get update -y && sudo apt-get install ccache
+      - name: Prepare data
+        run: |
+          if [ "$RUN_BIG_BENCHMARK" = "true" ]; then
+              rm -rf ~/data.osm.pbf
+              wget http://download.geofabrik.de/europe/poland-latest.osm.pbf -O ~/data.osm.pbf --quiet
+              gunzip -c ./pr/test/data/poland_gps_traces.csv.gz > ~/gps_traces.csv
+          else
+              if [ ! -f "~/data.osm.pbf" ]; then
+                wget http://download.geofabrik.de/europe/germany/berlin-latest.osm.pbf -O ~/data.osm.pbf
+              else
+                echo "Using cached data.osm.pbf"
+              fi
+              gunzip -c ./pr/test/data/berlin_gps_traces.csv.gz > ~/gps_traces.csv
+          fi
+      - name: Prepare environment
+        run: |
+          echo "CCACHE_DIR=$HOME/.ccache" >> $GITHUB_ENV
+          mkdir -p $HOME/.ccache
+          ccache --zero-stats
+          ccache --max-size=256M
+      - name: Build PR Branch
+        run: |
+          mkdir -p pr/build
+          cd pr/build
+          cmake -DENABLE_CONAN=ON -DCMAKE_BUILD_TYPE=Release ..
+          make -j$(nproc) 
+          make -j$(nproc) benchmarks
+          cd ..
+          make -C test/data 
+      - name: Checkout Base Branch
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.base.ref }}
+          path: base
+      - name: Build Base Branch
+        run: |
+          mkdir base/build
+          cd base/build
+          cmake -DENABLE_CONAN=ON -DCMAKE_BUILD_TYPE=Release ..
+          make -j$(nproc)
+          make -j$(nproc) benchmarks
+          cd ..
+          make -C test/data 
+      - name: Run Benchmarks
+        run: |
+          ./pr/scripts/ci/run_benchmarks.sh base pr
+      - name: Post Benchmark Results
+        run: |
+          python3 pr/scripts/ci/post_benchmark_results.py base_results pr_results
+      - name: Show CCache statistics
+        run: |
+          ccache -p
+          ccache -s
 
   ci-complete:
     runs-on: ubuntu-22.04
-    needs: [build-test-publish, docker-image, windows-release-node]
+    needs: [build-test-publish, docker-image, windows-release-node, benchmarks]
     steps:
     - run: echo "CI complete"

CHANGELOG.md

@@ -1,21 +1,43 @@
 # Unreleased
   - Changes from 5.27.1
     - Features
+      - REMOVED: Remove all core-CH left-overs [#6920](https://github.com/Project-OSRM/osrm-backend/pull/6920)
       - ADDED: Add support for a keepalive_timeout flag. [#6674](https://github.com/Project-OSRM/osrm-backend/pull/6674)
       - ADDED: Add support for a default_radius flag. [#6575](https://github.com/Project-OSRM/osrm-backend/pull/6575)
       - ADDED: Add support for disabling feature datasets. [#6666](https://github.com/Project-OSRM/osrm-backend/pull/6666)
       - ADDED: Add support for opposite approach request parameter. [#6842](https://github.com/Project-OSRM/osrm-backend/pull/6842)
       - ADDED: Add support for accessing edge flags in `process_segment` [#6658](https://github.com/Project-OSRM/osrm-backend/pull/6658)
     - Build:
+      - CHANGED: Upgrade clang-format to version 15. [#6919](https://github.com/Project-OSRM/osrm-backend/pull/6919)
+      - CHANGED: Use Debian Bookworm as base Docker image [#6904](https://github.com/Project-OSRM/osrm-backend/pull/6904)
+      - CHANGED: Upgrade CI actions to latest versions [#6893](https://github.com/Project-OSRM/osrm-backend/pull/6893)
+      - CHANGED:  Remove outdated warnings #6894 [#6894](https://github.com/Project-OSRM/osrm-backend/pull/6894)
       - ADDED: Add CI job which builds OSRM with gcc 12. [#6455](https://github.com/Project-OSRM/osrm-backend/pull/6455)
       - CHANGED: Upgrade to clang-tidy 15. [#6439](https://github.com/Project-OSRM/osrm-backend/pull/6439)
       - CHANGED: Update actions/cache to v3. [#6420](https://github.com/Project-OSRM/osrm-backend/pull/6420)
       - REMOVED: Drop support of Node 12 & 14. [#6431](https://github.com/Project-OSRM/osrm-backend/pull/6431)
       - ADDED: Add 'load directly' mode to default Cucumber test suite. [#6663](https://github.com/Project-OSRM/osrm-backend/pull/6663)
+      - CHANGED: Fix compilation for Boost 1.85.0 [#6856](https://github.com/Project-OSRM/osrm-backend/pull/6856)
       - CHANGED: Drop support for Node 16 [#6855](https://github.com/Project-OSRM/osrm-backend/pull/6855)
+      - REMOVED: Remove unused AppVeyor files [#6860](https://github.com/Project-OSRM/osrm-backend/pull/6860)
+      - CHANGED: Upgrade clang-format to version 15 [#6859](https://github.com/Project-OSRM/osrm-backend/pull/6859)
     - NodeJS:
       - CHANGED: Use node-api instead of NAN. [#6452](https://github.com/Project-OSRM/osrm-backend/pull/6452)
     - Misc:
+      - FIXED: Fix bugprone-unused-return-value clang-tidy warning. [#6934](https://github.com/Project-OSRM/osrm-backend/pull/6934)
+      - FIXED: Fix performance-noexcept-move-constructor clang-tidy warning. [#6931](https://github.com/Project-OSRM/osrm-backend/pull/6933)
+      - FIXED: Fix performance-noexcept-swap clang-tidy warning. [#6931](https://github.com/Project-OSRM/osrm-backend/pull/6931)
+      - CHANGED: Use custom struct instead of std::pair in QueryHeap. [#6921](https://github.com/Project-OSRM/osrm-backend/pull/6921)
+      - CHANGED: Use std::string_view::starts_with instead of boost::starts_with. [#6918](https://github.com/Project-OSRM/osrm-backend/pull/6918)
+      - CHANGED: Get rid of boost::math::constants::* and M_PI in favor of std::numbers. [#6916](https://github.com/Project-OSRM/osrm-backend/pull/6916)
+      - CHANGED: Make constants in PackedVector constexpr. [#6917](https://github.com/Project-OSRM/osrm-backend/pull/6917)
+      - CHANGED: Use std::variant instead of mapbox::util::variant. [#6903](https://github.com/Project-OSRM/osrm-backend/pull/6903)
+      - CHANGED: Bump rapidjson to version f9d53419e912910fd8fa57d5705fa41425428c35 [#6906](https://github.com/Project-OSRM/osrm-backend/pull/6906)
+      - CHANGED: Bump mapbox/variant to version 1.2.0 [#6898](https://github.com/Project-OSRM/osrm-backend/pull/6898)
+      - CHANGED: Avoid copy of std::function-based callback in path unpacking [#6895](https://github.com/Project-OSRM/osrm-backend/pull/6895)
+      - CHANGED: Replace boost::hash by std::hash [#6892](https://github.com/Project-OSRM/osrm-backend/pull/6892)
+      - CHANGED: Partial fix migration from boost::optional to std::optional [#6551](https://github.com/Project-OSRM/osrm-backend/issues/6551)
+      - CHANGED: Update Conan Boost version to 1.85.0. [#6868](https://github.com/Project-OSRM/osrm-backend/pull/6868)
       - FIXED: Fix an error in a RouteParameters AnnotationsType operator overload. [#6646](https://github.com/Project-OSRM/osrm-backend/pull/6646)
       - ADDED: Add support for "unlimited" to be passed as a value for the default-radius and max-matching-radius flags. [#6599](https://github.com/Project-OSRM/osrm-backend/pull/6599)
       - CHANGED: Allow -1.0 as unlimited for default_radius value. [#6599](https://github.com/Project-OSRM/osrm-backend/pull/6599)
@@ -41,6 +63,12 @@
       - FIXED: Fix adding traffic signal penalties during compression [#6419](https://github.com/Project-OSRM/osrm-backend/pull/6419)
       - FIXED: Correctly handle compressed traffic signals. [#6724](https://github.com/Project-OSRM/osrm-backend/pull/6724)
       - FIXED: Fix bug when searching for maneuver overrides [#6739](https://github.com/Project-OSRM/osrm-backend/pull/6739)
+      - FIXED: Remove force-loop checks for routes with u-turns [#6858](https://github.com/Project-OSRM/osrm-backend/pull/6858)
+      - FIXED: Correctly check runtime search conditions for forcing routing steps [#6866](https://github.com/Project-OSRM/osrm-backend/pull/6866)
+    - Map Matching:
+      - CHANGED: Optimise path distance calculation in MLD map matching even more. [#6884](https://github.com/Project-OSRM/osrm-backend/pull/6884)
+      - CHANGED: Optimise path distance calculation in MLD map matching. [#6876](https://github.com/Project-OSRM/osrm-backend/pull/6876)
+      - CHANGED: Optimise R-tree queries in the case of map matching. [#6881](https://github.com/Project-OSRM/osrm-backend/pull/6876)
     - Debug tiles:
       - FIXED: Ensure speed layer features have unique ids. [#6726](https://github.com/Project-OSRM/osrm-backend/pull/6726)
 

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.18)
 
-set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
@@ -31,7 +31,7 @@ option(ENABLE_ASSERTIONS "Use assertions in release mode" OFF)
 option(ENABLE_DEBUG_LOGGING "Use debug logging in release mode" OFF)
 option(ENABLE_COVERAGE "Build with coverage instrumentalisation" OFF)
 option(ENABLE_SANITIZER "Use memory sanitizer for Debug build" OFF)
-option(ENABLE_LTO "Use LTO if available" OFF)
+option(ENABLE_LTO "Use LTO if available" ON)
 option(ENABLE_FUZZING "Fuzz testing using LLVM's libFuzzer" OFF)
 option(ENABLE_NODE_BINDINGS "Build NodeJs bindings" OFF)
 option(ENABLE_CLANG_TIDY "Enables clang-tidy checks" OFF)
@@ -42,16 +42,13 @@ if (ENABLE_CLANG_TIDY)
     message(FATAL_ERROR "ENABLE_CLANG_TIDY is ON but clang-tidy is not found!")
   else()
     message(STATUS "Found clang-tidy at ${CLANG_TIDY_COMMAND}")
-    set(CMAKE_CXX_CLANG_TIDY "${CLANG_TIDY_COMMAND};--warnings-as-errors=*")
+    set(CMAKE_CXX_CLANG_TIDY "${CLANG_TIDY_COMMAND};--warnings-as-errors=*;--header-filter=.*")
   endif()
 endif()
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 
 # be compatible with version handling before cmake 3.x
-if (POLICY CMP0048)
-  cmake_policy(SET CMP0048 OLD)
-endif()
 if (POLICY CMP0057)
   cmake_policy(SET CMP0057 NEW)
 endif()
@@ -118,13 +115,12 @@ include(GNUInstallDirs)
 if(CMAKE_SIZEOF_VOID_P EQUAL 8)
   message(STATUS "Building on a 64 bit system")
 else()
-  message(STATUS "Building on a 32 bit system")
+  message(FATAL_ERROR "Building on a 32 bit system is not supported")
 endif()
 
 include_directories(BEFORE ${CMAKE_CURRENT_BINARY_DIR}/include/)
 include_directories(BEFORE ${CMAKE_CURRENT_SOURCE_DIR}/include/)
-include_directories(SYSTEM ${CMAKE_CURRENT_SOURCE_DIR}/third_party/sol2-3.3.0/include)
+include_directories(SYSTEM ${CMAKE_CURRENT_SOURCE_DIR}/third_party/sol2/include)
-include_directories(SYSTEM ${CMAKE_CURRENT_SOURCE_DIR}/third_party/variant/include)
 
 set(BOOST_COMPONENTS date_time chrono filesystem iostreams program_options regex system thread unit_test_framework)
 
@@ -226,7 +222,7 @@ endif()
 set(MAYBE_COVERAGE_LIBRARIES "")
 if (ENABLE_COVERAGE)
   if (NOT CMAKE_BUILD_TYPE MATCHES "Debug")
-    message(ERROR "ENABLE_COVERAGE=ON only make sense with a Debug build")
+    message(ERROR "ENABLE_COVERAGE=ON only makes sense with a Debug build")
   endif()
   message(STATUS "Enabling coverage")
   set(MAYBE_COVERAGE_LIBRARIES "-lgcov")
@@ -270,7 +266,6 @@ elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
   add_dependency_defines(-DBOOST_LIB_DIAGNOSTIC)
   add_dependency_defines(-D_CRT_SECURE_NO_WARNINGS)
   add_dependency_defines(-DNOMINMAX) # avoid min and max macros that can break compilation
-  add_dependency_defines(-D_USE_MATH_DEFINES) #needed for M_PI with cmath.h
   add_dependency_defines(-D_WIN32_WINNT=0x0501)
   add_dependency_defines(-DXML_STATIC)
   find_library(ws2_32_LIBRARY_PATH ws2_32)
@@ -312,7 +307,7 @@ add_subdirectory(${FLATBUFFERS_SRC_DIR}
         ${CMAKE_CURRENT_BINARY_DIR}/flatbuffers-build
         EXCLUDE_FROM_ALL)
 
-set(FMT_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/third_party/fmt-9.1.0/include")
+set(FMT_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/third_party/fmt/include")
 add_compile_definitions(FMT_HEADER_ONLY)
 include_directories(SYSTEM ${FMT_INCLUDE_DIR})
 
@@ -333,7 +328,7 @@ if(ENABLE_CONAN)
 
   conan_check(REQUIRED)
 
-  set(CONAN_BOOST_VERSION "1.79.0@#96e4902111a2e343a8ba0aa95391bb58")
+  set(CONAN_BOOST_VERSION "1.85.0@#14265ec82b25d91305bbb3b30d3357f8")
   set(CONAN_BZIP2_VERSION "1.0.8@#d1b2d5816f25865acf978501dff1f897")
   set(CONAN_EXPAT_VERSION "2.2.10@#916908d4a570ad839edd25322c3268cd")
   set(CONAN_LUA_VERSION "5.4.4@#3ec62efc37cd0a5d80b9e5cb35277360")
@@ -610,7 +605,6 @@ if (BUILD_ROUTED)
   set_property(TARGET osrm-routed PROPERTY INSTALL_RPATH_USE_LINK_PATH TRUE)
 endif()
 
-file(GLOB VariantGlob third_party/variant/include/mapbox/*.hpp)
 file(GLOB FlatbuffersGlob third_party/flatbuffers/include/flatbuffers/*.h)
 file(GLOB LibraryGlob include/osrm/*.hpp)
 file(GLOB ParametersGlob include/engine/api/*_parameters.hpp)
@@ -630,7 +624,6 @@ install(FILES ${ContractorHeader} DESTINATION include/osrm/contractor)
 install(FILES ${LibraryGlob} DESTINATION include/osrm)
 install(FILES ${ParametersGlob} DESTINATION include/osrm/engine/api)
 install(FILES ${ApiHeader} DESTINATION include/osrm/engine/api)
-install(FILES ${VariantGlob} DESTINATION include/mapbox)
 install(FILES ${FlatbuffersGlob} DESTINATION include/flatbuffers)
 install(TARGETS osrm-extract DESTINATION bin)
 install(TARGETS osrm-partition DESTINATION bin)

CONTRIBUTING.md

@@ -10,7 +10,7 @@ You can add a :+1: emoji reaction to the issue if you want to express interest i
 
 # Developer
 
-We use `clang-format` version `3.8` to consistently format the code base. There is a helper script under `scripts/format.sh`.
+We use `clang-format` version `15` to consistently format the code base. There is a helper script under `scripts/format.sh`.
 The format is automatically checked by the `mason-linux-release` job of a Travis CI build.
 To save development time a local hook `.git/hooks/pre-push`
 ```

README.md

@@ -15,7 +15,7 @@ The following services are available via HTTP API, C++ library interface and Nod
 
 To quickly try OSRM use our [demo server](http://map.project-osrm.org) which comes with both the backend and a frontend on top.
 
-For a quick introduction about how the road network is represented in OpenStreetMap and how to map specific road network features have a look at [this guide about mapping for navigation](https://www.mapbox.com/mapping/mapping-for-navigation/).
+For a quick introduction about how the road network is represented in OpenStreetMap and how to map specific road network features have a look at [the OSM wiki on routing](https://wiki.openstreetmap.org/wiki/Routing) or [this guide about mapping for navigation](https://web.archive.org/web/20221206013651/https://labs.mapbox.com/mapping/mapping-for-navigation/).
 
 Related [Project-OSRM](https://github.com/Project-OSRM) repositories:
 - [osrm-frontend](https://github.com/Project-OSRM/osrm-frontend) - User-facing frontend with map. The demo server runs this on top of the backend

appveyor.yml

@@ -1,15 +0,0 @@
-os: Visual Studio 2019
-
-# clone directory
-clone_folder: c:\projects\osrm
-
-platform: x64
-
-# no-op for the time being until someone with access to GitHub checks settings will remove integration with AppVeyor
-# https://github.com/Project-OSRM/osrm-backend/pull/6312#issuecomment-1217237055 
-build_script:
-  - EXIT 0
-
-branches:
-  only:
-    - master

build-local.bat

@@ -1,32 +0,0 @@
-@ECHO OFF
-SETLOCAL
-SET EL=0
-
-ECHO ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ %~f0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-SET PLATFORM=x64
-SET CONFIGURATION=Release
-::SET LOCAL_DEV=1
-
-FOR /F "tokens=*" %%i in ('git rev-parse --abbrev-ref HEAD') do SET APPVEYOR_REPO_BRANCH=%%i
-ECHO APPVEYOR_REPO_BRANCH^: %APPVEYOR_REPO_BRANCH%
-
-SET PATH=C:\Program Files\7-Zip;%PATH%
-
-powershell Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy Unrestricted -Force
-IF %ERRORLEVEL% NEQ 0 GOTO ERROR
-CALL appveyor-build.bat
-IF %ERRORLEVEL% NEQ 0 GOTO ERROR
-
-GOTO DONE
-
-
-:ERROR
-ECHO ~~~~~~~~~~~~~~~~~~~~~~ ERROR %~f0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-ECHO ERRORLEVEL^: %ERRORLEVEL%
-SET EL=%ERRORLEVEL%
-
-:DONE
-ECHO ~~~~~~~~~~~~~~~~~~~~~~ DONE %~f0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-EXIT /b %EL%

cmake/conan.cmake

@@ -55,7 +55,7 @@ function(_get_msvc_ide_version result)
         set(${result} 15 PARENT_SCOPE)
     elseif(NOT MSVC_VERSION VERSION_LESS 1920 AND MSVC_VERSION VERSION_LESS 1930)
         set(${result} 16 PARENT_SCOPE)
-    elseif(NOT MSVC_VERSION VERSION_LESS 1930 AND MSVC_VERSION VERSION_LESS 1940)
+    elseif(NOT MSVC_VERSION VERSION_LESS 1930 AND MSVC_VERSION VERSION_LESS 1950)
         set(${result} 17 PARENT_SCOPE)
     else()
         message(FATAL_ERROR "Conan: Unknown MSVC compiler version [${MSVC_VERSION}]")

cmake/warnings.cmake

@@ -50,9 +50,7 @@ add_warning(all)
 add_warning(extra)
 add_warning(pedantic)
 add_warning(error) # treat all warnings as errors
-if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
-    add_warning(strict-overflow=2)
-elseif(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
     add_warning(strict-overflow=1)
 endif()
 add_warning(suggest-override)
@@ -79,15 +77,10 @@ add_warning(sizeof-array-argument)
 add_warning(switch-bool)
 add_warning(tautological-compare)
 add_warning(trampolines)
-no_warning(c++17-extensions)
+# these warnings are not enabled by default
-# TODO: these warnings are not enabled by default, but we consider them as useful and good to enable in the future
+# no_warning(name-of-warning)
-no_warning(implicit-int-conversion)
+no_warning(deprecated-comma-subscript)
-no_warning(implicit-float-conversion)
+no_warning(comma-subscript)
-no_warning(unused-member-function)
+no_warning(ambiguous-reversed-operator)
-no_warning(old-style-cast)
+no_warning(restrict)
-no_warning(non-virtual-dtor)
+no_warning(free-nonheap-object)
-no_warning(float-conversion)
-no_warning(sign-conversion)
-no_warning(shorten-64-to-32)
-no_warning(padded)
-no_warning(missing-noreturn)

docker/Dockerfile

@@ -1,15 +1,15 @@
-FROM debian:bullseye-slim as builder
+FROM debian:bookworm-slim as builder
 ARG DOCKER_TAG
 ARG BUILD_CONCURRENCY
 RUN mkdir -p /src  && mkdir -p /opt
 
 RUN apt-get update && \
     apt-get -y --no-install-recommends install ca-certificates cmake make git gcc g++ libbz2-dev libxml2-dev wget \
-    libzip-dev libboost1.74-all-dev lua5.4 liblua5.4-dev pkg-config -o APT::Install-Suggests=0 -o APT::Install-Recommends=0
+    libzip-dev libboost1.81-all-dev lua5.4 liblua5.4-dev pkg-config -o APT::Install-Suggests=0 -o APT::Install-Recommends=0
 
 RUN NPROC=${BUILD_CONCURRENCY:-$(nproc)} && \
     ldconfig /usr/local/lib && \
-    git clone --branch v2021.3.0 --single-branch https://github.com/oneapi-src/oneTBB.git && \
+    git clone --branch v2021.12.0 --single-branch https://github.com/oneapi-src/oneTBB.git && \
     cd oneTBB && \
     mkdir build && \
     cd build && \
@@ -21,6 +21,7 @@ COPY . /src
 WORKDIR /src
 
 RUN NPROC=${BUILD_CONCURRENCY:-$(nproc)} && \
+    export CXXFLAGS="-Wno-array-bounds -Wno-uninitialized" && \
     echo "Building OSRM ${DOCKER_TAG}" && \
     git show --format="%H" | head -n1 > /opt/OSRM_GITSHA && \
     echo "Building OSRM gitsha $(cat /opt/OSRM_GITSHA)" && \
@@ -42,15 +43,15 @@ RUN NPROC=${BUILD_CONCURRENCY:-$(nproc)} && \
 
 # Multistage build to reduce image size - https://docs.docker.com/engine/userguide/eng-image/multistage-build/#use-multi-stage-builds
 # Only the content below ends up in the image, this helps remove /src from the image (which is large)
-FROM debian:bullseye-slim as runstage
+FROM debian:bookworm-slim as runstage
 
 COPY --from=builder /usr/local /usr/local
 COPY --from=builder /opt /opt
 
 RUN apt-get update && \
-    apt-get install -y --no-install-recommends libboost-program-options1.74.0 libboost-regex1.74.0 \
+    apt-get install -y --no-install-recommends libboost-program-options1.81.0 libboost-regex1.81.0 \
-        libboost-date-time1.74.0 libboost-chrono1.74.0 libboost-filesystem1.74.0 \
+        libboost-date-time1.81.0 libboost-chrono1.81.0 libboost-filesystem1.81.0 \
-        libboost-iostreams1.74.0 libboost-system1.74.0 libboost-thread1.74.0 \
+        libboost-iostreams1.81.0 libboost-system1.81.0 libboost-thread1.81.0 \
         expat liblua5.4-0 && \
     rm -rf /var/lib/apt/lists/* && \
 # add /usr/local/lib to ldconfig to allow loading libraries from there

docs/nodejs/api.md

@@ -21,7 +21,7 @@ var osrm = new OSRM('network.osrm');
 **Parameters**
 
 -   `options` **([Object](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object) \| [String](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String))** Options for creating an OSRM object or string to the `.osrm` file. (optional, default `{shared_memory:true}`)
-    -   `options.algorithm` **[String](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String)?** The algorithm to use for routing. Can be 'CH', 'CoreCH' or 'MLD'. Default is 'CH'.
+    -   `options.algorithm` **[String](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String)?** The algorithm to use for routing. Can be 'CH', or 'MLD'. Default is 'CH'.
                Make sure you prepared the dataset with the correct toolchain.
     -   `options.shared_memory` **[Boolean](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean)?** Connects to the persistent shared memory datastore.
                This requires you to run `osrm-datastore` prior to creating an `OSRM` object.

example/example.cpp

@@ -57,15 +57,15 @@ int main(int argc, const char *argv[])
     // Execute routing request, this does the heavy lifting
     const auto status = osrm.Route(params, result);
 
-    auto &json_result = result.get<json::Object>();
+    auto &json_result = std::get<json::Object>(result);
     if (status == Status::Ok)
     {
-        auto &routes = json_result.values["routes"].get<json::Array>();
+        auto &routes = std::get<json::Array>(json_result.values["routes"]);
 
         // Let's just use the first route
-        auto &route = routes.values.at(0).get<json::Object>();
+        auto &route = std::get<json::Object>(routes.values.at(0));
-        const auto distance = route.values["distance"].get<json::Number>().value;
+        const auto distance = std::get<json::Number>(route.values["distance"]).value;
-        const auto duration = route.values["duration"].get<json::Number>().value;
+        const auto duration = std::get<json::Number>(route.values["duration"]).value;
 
         // Warn users if extract does not contain the default coordinates from above
         if (distance == 0 || duration == 0)
@@ -80,8 +80,8 @@ int main(int argc, const char *argv[])
     }
     else if (status == Status::Error)
     {
-        const auto code = json_result.values["code"].get<json::String>().value;
+        const auto code = std::get<json::String>(json_result.values["code"]).value;
-        const auto message = json_result.values["message"].get<json::String>().value;
+        const auto message = std::get<json::String>(json_result.values["message"]).value;
 
         std::cout << "Code: " << code << "\n";
         std::cout << "Message: " << code << "\n";

features/testbot/force_step.feature

@@ -0,0 +1,101 @@
+@routing @testbot @via
+Feature: Force routing steps
+    Background:
+        Given the profile "testbot"
+
+    Scenario: Direct routes with waypoints on same edge
+        Given the node map
+            """
+              1   2
+            a-------b
+            |       |
+            d-------c
+            |       |
+            e-------f
+              3   4
+            """
+
+        And the ways
+            | nodes | oneway |
+            | ab    | no     |
+            | ad    | no     |
+            | bc    | no     |
+            | cf    | no     |
+            | dc    | no     |
+            | de    | no     |
+            | ef    | yes    |
+
+        When I route I should get
+            | waypoints | approaches        | weight | route          |
+            | 1,2       |                   | 20     | ab,ab          |
+            | 1,2       | curb curb         | 100    | ab,ad,dc,bc,ab |
+            | 2,1       |                   | 20     | ab,ab          |
+            | 2,1       | opposite opposite | 100    | ab,bc,dc,ad,ab |
+            | 3,4       |                   | 20     | ef,ef          |
+            | 4,3       |                   | 100    | ef,cf,dc,de,ef |
+
+    Scenario: Via routes with waypoints on same edge
+        Given the node map
+            """
+              1   2
+            a-------b
+            |       |
+            d-5-----c
+            |       |
+            e-------f
+              3   4
+            """
+
+        And the ways
+            | nodes | oneway |
+            | ab    | no     |
+            | ad    | no     |
+            | bc    | no     |
+            | cf    | no     |
+            | dc    | no     |
+            | de    | no     |
+            | ef    | yes    |
+
+        When I route I should get
+            | waypoints | approaches                     | weight | route                      |
+            | 5,1,2     |                                | 59.8   | dc,ad,ab,ab,ab             |
+            | 5,1,2     | unrestricted curb curb         | 180.2  | dc,bc,ab,ab,ab,ad,dc,bc,ab |
+            | 5,2,1     |                                | 80.2   | dc,bc,ab,ab,ab             |
+            | 5,2,1     | unrestricted opposite opposite | 159.8  | dc,ad,ab,ab,ab,bc,dc,ad,ab |
+            | 5,3,4     |                                | 59.8   | dc,de,ef,ef,ef             |
+            | 5,4,3     |                                | 159.8  | dc,de,ef,ef,ef,cf,dc,de,ef |
+
+
+    Scenario: [U-turns allowed] Via routes with waypoints on same edge
+        Given the node map
+            """
+              1   2
+            a-------b
+            |       |
+            d-5-----c
+            |       |
+            e-------f
+              3   4
+            """
+
+        And the ways
+            | nodes | oneway |
+            | ab    | no     |
+            | ad    | no     |
+            | bc    | no     |
+            | cf    | no     |
+            | dc    | no     |
+            | de    | no     |
+            | ef    | yes    |
+
+        And the query options
+            | continue_straight | false |
+
+        When I route I should get
+            | waypoints | approaches                     | weight | route                      |
+            | 5,1,2     |                                | 59.8   | dc,ad,ab,ab,ab             |
+            | 5,1,2     | unrestricted curb curb         | 180.2  | dc,bc,ab,ab,ab,ad,dc,bc,ab |
+            | 5,2,1     |                                | 79.8   | dc,ad,ab,ab,ab,ab          |
+            | 5,2,1     | unrestricted opposite opposite | 159.8  | dc,ad,ab,ab,ab,bc,dc,ad,ab |
+            | 5,3,4     |                                | 59.8   | dc,de,ef,ef,ef             |
+            | 5,4,3     |                                | 159.8  | dc,de,ef,ef,ef,cf,dc,de,ef |

include/contractor/contract_excludable_graph.hpp

@@ -61,10 +61,12 @@ inline auto contractExcludableGraph(ContractorGraph contractor_graph_,
         // Add all non-core edges to container
         {
             auto non_core_edges = toEdges<QueryEdge>(contractor_graph);
-            auto new_end =
+            auto new_end = std::remove_if(non_core_edges.begin(),
-                std::remove_if(non_core_edges.begin(), non_core_edges.end(), [&](const auto &edge) {
+                                          non_core_edges.end(),
-                    return is_shared_core[edge.source] && is_shared_core[edge.target];
+                                          [&](const auto &edge) {
-                });
+                                              return is_shared_core[edge.source] &&
+                                                     is_shared_core[edge.target];
+                                          });
             non_core_edges.resize(new_end - non_core_edges.begin());
             edge_container.Insert(std::move(non_core_edges));
 
@@ -75,8 +77,8 @@ inline auto contractExcludableGraph(ContractorGraph contractor_graph_,
         }
 
         // Extract core graph for further contraction
-        shared_core_graph = contractor_graph.Filter(
+        shared_core_graph = contractor_graph.Filter([&is_shared_core](const NodeID node)
-            [&is_shared_core](const NodeID node) { return is_shared_core[node]; });
+                                                    { return is_shared_core[node]; });
     }
 
     for (const auto &filter : filters)

include/contractor/contracted_edge_container.hpp

@@ -89,37 +89,40 @@ struct ContractedEdgeContainer
 
         // Remove all edges that are contained in the old set of edges and set the appropriate flag.
         auto new_end =
-            std::remove_if(new_edges.begin(), new_edges.end(), [&](const QueryEdge &edge) {
+            std::remove_if(new_edges.begin(),
-                // check if the new edge would be sorted before the currend old edge
+                           new_edges.end(),
-                // if so it is not contained yet in the set of old edges
+                           [&](const QueryEdge &edge)
-                if (edge_iter == edge_end || mergeCompare(edge, *edge_iter))
+                           {
-                {
+                               // check if the new edge would be sorted before the currend old edge
-                    return false;
+                               // if so it is not contained yet in the set of old edges
-                }
+                               if (edge_iter == edge_end || mergeCompare(edge, *edge_iter))
+                               {
+                                   return false;
+                               }
 
-                // find the first old edge that is equal or greater then the new edge
+                               // find the first old edge that is equal or greater then the new edge
-                while (edge_iter != edge_end && mergeCompare(*edge_iter, edge))
+                               while (edge_iter != edge_end && mergeCompare(*edge_iter, edge))
-                {
+                               {
-                    BOOST_ASSERT(flags_iter != flags.end());
+                                   BOOST_ASSERT(flags_iter != flags.end());
-                    edge_iter++;
+                                   edge_iter++;
-                    flags_iter++;
+                                   flags_iter++;
-                }
+                               }
 
-                // all new edges will be sorted after the old edges
+                               // all new edges will be sorted after the old edges
-                if (edge_iter == edge_end)
+                               if (edge_iter == edge_end)
-                {
+                               {
-                    return false;
+                                   return false;
-                }
+                               }
 
-                BOOST_ASSERT(edge_iter != edge_end);
+                               BOOST_ASSERT(edge_iter != edge_end);
-                if (mergable(edge, *edge_iter))
+                               if (mergable(edge, *edge_iter))
-                {
+                               {
-                    *flags_iter = *flags_iter | flag;
+                                   *flags_iter = *flags_iter | flag;
-                    return true;
+                                   return true;
-                }
+                               }
-                BOOST_ASSERT(mergeCompare(edge, *edge_iter));
+                               BOOST_ASSERT(mergeCompare(edge, *edge_iter));
-                return false;
+                               return false;
-            });
+                           });
 
         // append new edges
         edges.insert(edges.end(), new_edges.begin(), new_end);
@@ -132,10 +135,10 @@ struct ContractedEdgeContainer
         // enforce sorting for next merge step
         std::vector<unsigned> ordering(edges_size);
         std::iota(ordering.begin(), ordering.end(), 0);
-        tbb::parallel_sort(
+        tbb::parallel_sort(ordering.begin(),
-            ordering.begin(), ordering.end(), [&](const auto lhs_idx, const auto rhs_idx) {
+                           ordering.end(),
-                return mergeCompare(edges[lhs_idx], edges[rhs_idx]);
+                           [&](const auto lhs_idx, const auto rhs_idx)
-            });
+                           { return mergeCompare(edges[lhs_idx], edges[rhs_idx]); });
         auto permutation = util::orderingToPermutation(ordering);
 
         util::inplacePermutation(edges.begin(), edges.end(), permutation);

include/contractor/crc32_processor.hpp

@@ -1,128 +0,0 @@
-#ifndef ITERATOR_BASED_CRC32_H
-#define ITERATOR_BASED_CRC32_H
-
-#if defined(__x86_64__) && !defined(__MINGW64__)
-#include <cpuid.h>
-#endif
-
-#include <boost/crc.hpp> // for boost::crc_32_type
-
-#include <iterator>
-
-namespace osrm::contractor
-{
-
-class IteratorbasedCRC32
-{
-  public:
-    bool UsingHardware() const { return use_hardware_implementation; }
-
-    IteratorbasedCRC32() : crc(0) { use_hardware_implementation = DetectHardwareSupport(); }
-
-    template <class Iterator> unsigned operator()(Iterator iter, const Iterator end)
-    {
-        unsigned crc = 0;
-        while (iter != end)
-        {
-            using value_type = typename std::iterator_traits<Iterator>::value_type;
-            const char *data = reinterpret_cast<const char *>(&(*iter));
-
-            if (use_hardware_implementation)
-            {
-                crc = ComputeInHardware(data, sizeof(value_type));
-            }
-            else
-            {
-                crc = ComputeInSoftware(data, sizeof(value_type));
-            }
-            ++iter;
-        }
-        return crc;
-    }
-
-  private:
-    bool DetectHardwareSupport() const
-    {
-        static const int sse42_bit = 0x00100000;
-        const unsigned ecx = cpuid();
-        const bool sse42_found = (ecx & sse42_bit) != 0;
-        return sse42_found;
-    }
-
-    unsigned ComputeInSoftware(const char *str, unsigned len)
-    {
-        crc_processor.process_bytes(str, len);
-        return crc_processor.checksum();
-    }
-
-    // adapted from http://byteworm.com/2010/10/13/crc32/
-    unsigned ComputeInHardware(const char *str, unsigned len)
-    {
-#if defined(__x86_64__)
-        unsigned q = len / sizeof(unsigned);
-        unsigned r = len % sizeof(unsigned);
-        unsigned *p = (unsigned *)str;
-
-        // crc=0;
-        while (q--)
-        {
-            __asm__ __volatile__(".byte 0xf2, 0xf, 0x38, 0xf1, 0xf1;"
-                                 : "=S"(crc)
-                                 : "0"(crc), "c"(*p));
-            ++p;
-        }
-
-        str = reinterpret_cast<char *>(p);
-        while (r--)
-        {
-            __asm__ __volatile__(".byte 0xf2, 0xf, 0x38, 0xf1, 0xf1;"
-                                 : "=S"(crc)
-                                 : "0"(crc), "c"(*str));
-            ++str;
-        }
-#else
-        (void)str;
-        (void)len;
-#endif
-        return crc;
-    }
-
-    inline unsigned cpuid() const
-    {
-        unsigned eax = 0, ebx = 0, ecx = 0, edx = 0;
-        // on X64 this calls hardware cpuid(.) instr. otherwise a dummy impl.
-        __get_cpuid(1, &eax, &ebx, &ecx, &edx);
-        return ecx;
-    }
-
-#if defined(__MINGW64__) || defined(_MSC_VER) || !defined(__x86_64__)
-    inline void __get_cpuid(int /*param*/,
-                            unsigned * /*eax*/,
-                            unsigned * /*ebx*/,
-                            unsigned *ecx,
-                            unsigned * /*edx*/) const
-    {
-        *ecx = 0;
-    }
-#endif
-
-    boost::crc_optimal<32, 0x1EDC6F41, 0x0, 0x0, true, true> crc_processor;
-    unsigned crc;
-    bool use_hardware_implementation;
-};
-
-struct RangebasedCRC32
-{
-    template <typename Iteratable> unsigned operator()(const Iteratable &iterable)
-    {
-        return crc32(std::begin(iterable), std::end(iterable));
-    }
-
-    bool UsingHardware() const { return crc32.UsingHardware(); }
-
-  private:
-    IteratorbasedCRC32 crc32;
-};
-} // namespace osrm::contractor
-
-#endif /* ITERATOR_BASED_CRC32_H */

include/customizer/cell_customizer.hpp

@@ -122,7 +122,8 @@ class CellCustomizer
         for (std::size_t level = 1; level < partition.GetNumberOfLevels(); ++level)
         {
             tbb::parallel_for(tbb::blocked_range<std::size_t>(0, partition.GetNumberOfCells(level)),
-                              [&](const tbb::blocked_range<std::size_t> &range) {
+                              [&](const tbb::blocked_range<std::size_t> &range)
+                              {
                                   auto &heap = heaps.local();
                                   for (auto id = range.begin(), end = range.end(); id != end; ++id)
                                   {

include/engine/api/base_api.hpp

@@ -40,10 +40,10 @@ class BaseAPI
         util::json::Array waypoints;
         waypoints.values.resize(parameters.coordinates.size());
 
-        boost::range::transform(
+        boost::range::transform(waypoint_candidates,
-            waypoint_candidates,
+                                waypoints.values.begin(),
-            waypoints.values.begin(),
+                                [this](const PhantomNodeCandidates &candidates)
-            [this](const PhantomNodeCandidates &candidates) { return MakeWaypoint(candidates); });
+                                { return MakeWaypoint(candidates); });
         return waypoints;
     }
 
@@ -104,9 +104,8 @@ class BaseAPI
         std::transform(waypoint_candidates.begin(),
                        waypoint_candidates.end(),
                        waypoints.begin(),
-                       [this, builder](const PhantomNodeCandidates &candidates) {
+                       [this, builder](const PhantomNodeCandidates &candidates)
-                           return MakeWaypoint(builder, candidates)->Finish();
+                       { return MakeWaypoint(builder, candidates)->Finish(); });
-                       });
         return builder->CreateVector(waypoints);
     }
 

include/engine/api/base_parameters.hpp

@@ -112,7 +112,8 @@ struct BaseParameters
                (approaches.empty() || approaches.size() == coordinates.size()) &&
                std::all_of(bearings.begin(),
                            bearings.end(),
-                           [](const boost::optional<Bearing> &bearing_and_range) {
+                           [](const boost::optional<Bearing> &bearing_and_range)
+                           {
                                if (bearing_and_range)
                                {
                                    return bearing_and_range->IsValid();

include/engine/api/base_result.hpp

@@ -2,7 +2,7 @@
 #define ENGINE_API_BASE_RESULT_HPP
 
 #include <flatbuffers/flatbuffers.h>
-#include <mapbox/variant.hpp>
+#include <variant>
 
 #include <string>
 
@@ -10,8 +10,7 @@
 
 namespace osrm::engine::api
 {
-using ResultT =
+using ResultT = std::variant<util::json::Object, std::string, flatbuffers::FlatBufferBuilder>;
-    mapbox::util::variant<util::json::Object, std::string, flatbuffers::FlatBufferBuilder>;
 } // namespace osrm::engine::api
 
 #endif

include/engine/api/json_factory.hpp

@@ -41,7 +41,7 @@ inline bool hasValidLanes(const guidance::IntermediateIntersection &intersection
     return intersection.lanes.lanes_in_turn > 0;
 }
 
-util::json::Array coordinateToLonLat(const util::Coordinate &coordinate);
+util::json::Value coordinateToLonLat(const util::Coordinate &coordinate);
 
 /**
  * Ensures that a bearing value is a whole number, and clamped to the range 0-359
@@ -79,7 +79,7 @@ util::json::Object makeGeoJSONGeometry(ForwardIter begin, ForwardIter end)
         coordinates.values.push_back(location);
         coordinates.values.push_back(location);
     }
-    geojson.values["coordinates"] = std::move(coordinates);
+    geojson.values["coordinates"] = util::json::Value{std::move(coordinates)};
 
     return geojson;
 }

include/engine/api/match_api.hpp

@@ -30,14 +30,14 @@ class MatchAPI final : public RouteAPI
                       osrm::engine::api::ResultT &response) const
     {
         BOOST_ASSERT(sub_matchings.size() == sub_routes.size());
-        if (response.is<flatbuffers::FlatBufferBuilder>())
+        if (std::holds_alternative<flatbuffers::FlatBufferBuilder>(response))
         {
-            auto &fb_result = response.get<flatbuffers::FlatBufferBuilder>();
+            auto &fb_result = std::get<flatbuffers::FlatBufferBuilder>(response);
             MakeResponse(sub_matchings, sub_routes, fb_result);
         }
         else
         {
-            auto &json_result = response.get<util::json::Object>();
+            auto &json_result = std::get<util::json::Object>(response);
             MakeResponse(sub_matchings, sub_routes, json_result);
         }
     }
@@ -52,9 +52,10 @@ class MatchAPI final : public RouteAPI
             data_version_string = fb_result.CreateString(data_timestamp);
         }
 
-        auto response = MakeFBResponse(sub_routes, fb_result, [this, &fb_result, &sub_matchings]() {
+        auto response = MakeFBResponse(sub_routes,
-            return MakeTracepoints(fb_result, sub_matchings);
+                                       fb_result,
-        });
+                                       [this, &fb_result, &sub_matchings]()
+                                       { return MakeTracepoints(fb_result, sub_matchings); });
 
         if (!data_timestamp.empty())
         {

include/engine/api/match_parameters.hpp

@@ -67,7 +67,7 @@ struct MatchParameters : public RouteParameters
     MatchParameters(const std::vector<unsigned> &timestamps_,
                     GapsType gaps_,
                     bool tidy_,
-                    Args &&... args_)
+                    Args &&...args_)
         : MatchParameters(timestamps_, gaps_, tidy_, {}, std::forward<Args>(args_)...)
     {
     }
@@ -77,7 +77,7 @@ struct MatchParameters : public RouteParameters
                     GapsType gaps_,
                     bool tidy_,
                     const std::vector<std::size_t> &waypoints_,
-                    Args &&... args_)
+                    Args &&...args_)
         : RouteParameters{std::forward<Args>(args_)..., waypoints_}, timestamps{std::move(
                                                                          timestamps_)},
           gaps(gaps_), tidy(tidy_)

include/engine/api/nearest_api.hpp

@@ -29,14 +29,14 @@ class NearestAPI final : public BaseAPI
         BOOST_ASSERT(phantom_nodes.size() == 1);
         BOOST_ASSERT(parameters.coordinates.size() == 1);
 
-        if (response.is<flatbuffers::FlatBufferBuilder>())
+        if (std::holds_alternative<flatbuffers::FlatBufferBuilder>(response))
         {
-            auto &fb_result = response.get<flatbuffers::FlatBufferBuilder>();
+            auto &fb_result = std::get<flatbuffers::FlatBufferBuilder>(response);
             MakeResponse(phantom_nodes, fb_result);
         }
         else
         {
-            auto &json_result = response.get<util::json::Object>();
+            auto &json_result = std::get<util::json::Object>(response);
             MakeResponse(phantom_nodes, json_result);
         }
     }
@@ -57,20 +57,20 @@ class NearestAPI final : public BaseAPI
         {
             std::vector<flatbuffers::Offset<fbresult::Waypoint>> waypoints;
             waypoints.resize(phantom_nodes.front().size());
-            std::transform(
+            std::transform(phantom_nodes.front().begin(),
-                phantom_nodes.front().begin(),
+                           phantom_nodes.front().end(),
-                phantom_nodes.front().end(),
+                           waypoints.begin(),
-                waypoints.begin(),
+                           [this, &fb_result](const PhantomNodeWithDistance &phantom_with_distance)
-                [this, &fb_result](const PhantomNodeWithDistance &phantom_with_distance) {
+                           {
-                    auto &phantom_node = phantom_with_distance.phantom_node;
+                               auto &phantom_node = phantom_with_distance.phantom_node;
 
-                    auto node_values = MakeNodes(phantom_node);
+                               auto node_values = MakeNodes(phantom_node);
-                    fbresult::Uint64Pair nodes{node_values.first, node_values.second};
+                               fbresult::Uint64Pair nodes{node_values.first, node_values.second};
 
-                    auto waypoint = MakeWaypoint(&fb_result, {phantom_node});
+                               auto waypoint = MakeWaypoint(&fb_result, {phantom_node});
-                    waypoint->add_nodes(&nodes);
+                               waypoint->add_nodes(&nodes);
-                    return waypoint->Finish();
+                               return waypoint->Finish();
-                });
+                           });
 
             waypoints_vector = fb_result.CreateVector(waypoints);
         }
@@ -94,7 +94,8 @@ class NearestAPI final : public BaseAPI
             std::transform(phantom_nodes.front().begin(),
                            phantom_nodes.front().end(),
                            waypoints.values.begin(),
-                           [this](const PhantomNodeWithDistance &phantom_with_distance) {
+                           [this](const PhantomNodeWithDistance &phantom_with_distance)
+                           {
                                auto &phantom_node = phantom_with_distance.phantom_node;
                                auto waypoint = MakeWaypoint({phantom_node});
 

include/engine/api/route_api.hpp

@@ -50,14 +50,14 @@ class RouteAPI : public BaseAPI
     {
         BOOST_ASSERT(!raw_routes.routes.empty());
 
-        if (response.is<flatbuffers::FlatBufferBuilder>())
+        if (std::holds_alternative<flatbuffers::FlatBufferBuilder>(response))
         {
-            auto &fb_result = response.get<flatbuffers::FlatBufferBuilder>();
+            auto &fb_result = std::get<flatbuffers::FlatBufferBuilder>(response);
             MakeResponse(raw_routes, waypoint_candidates, fb_result);
         }
         else
         {
-            auto &json_result = response.get<util::json::Object>();
+            auto &json_result = std::get<util::json::Object>(response);
             MakeResponse(raw_routes, waypoint_candidates, json_result);
         }
     }
@@ -77,9 +77,10 @@ class RouteAPI : public BaseAPI
         }
 
         auto response =
-            MakeFBResponse(raw_routes, fb_result, [this, &waypoint_candidates, &fb_result]() {
+            MakeFBResponse(raw_routes,
-                return BaseAPI::MakeWaypoints(&fb_result, waypoint_candidates);
+                           fb_result,
-            });
+                           [this, &waypoint_candidates, &fb_result]()
+                           { return BaseAPI::MakeWaypoints(&fb_result, waypoint_candidates); });
 
         if (!data_timestamp.empty())
         {
@@ -157,8 +158,8 @@ class RouteAPI : public BaseAPI
     }
 
     template <typename ForwardIter>
-    mapbox::util::variant<flatbuffers::Offset<flatbuffers::String>,
+    std::variant<flatbuffers::Offset<flatbuffers::String>,
-                          flatbuffers::Offset<flatbuffers::Vector<const fbresult::Position *>>>
+                 flatbuffers::Offset<flatbuffers::Vector<const fbresult::Position *>>>
     MakeGeometry(flatbuffers::FlatBufferBuilder &builder, ForwardIter begin, ForwardIter end) const
     {
         if (parameters.geometries == RouteParameters::GeometriesType::Polyline)
@@ -171,10 +172,15 @@ class RouteAPI : public BaseAPI
         }
         std::vector<fbresult::Position> coordinates;
         coordinates.resize(std::distance(begin, end));
-        std::transform(begin, end, coordinates.begin(), [](const Coordinate &c) {
+        std::transform(begin,
-            return fbresult::Position{static_cast<float>(util::toFloating(c.lon).__value),
+                       end,
-                                      static_cast<float>(util::toFloating(c.lat).__value)};
+                       coordinates.begin(),
-        });
+                       [](const Coordinate &c)
+                       {
+                           return fbresult::Position{
+                               static_cast<float>(util::toFloating(c.lon).__value),
+                               static_cast<float>(util::toFloating(c.lat).__value)};
+                       });
         return builder.CreateVectorOfStructs(coordinates);
     }
 
@@ -354,9 +360,8 @@ class RouteAPI : public BaseAPI
                 std::transform(leg.steps.begin(),
                                leg.steps.end(),
                                legSteps.begin(),
-                               [this, &fb_result, &leg_geometry](auto &step) {
+                               [this, &fb_result, &leg_geometry](auto &step)
-                                   return this->MakeFBStep(fb_result, leg_geometry, step);
+                               { return this->MakeFBStep(fb_result, leg_geometry, step); });
-                               });
             }
             auto steps_vector = fb_result.CreateVector(legSteps);
 
@@ -403,8 +408,8 @@ class RouteAPI : public BaseAPI
 
         // Fill geometry
         auto overview = MakeOverview(leg_geometries);
-        mapbox::util::variant<flatbuffers::Offset<flatbuffers::String>,
+        std::variant<flatbuffers::Offset<flatbuffers::String>,
-                              flatbuffers::Offset<flatbuffers::Vector<const fbresult::Position *>>>
+                     flatbuffers::Offset<flatbuffers::Vector<const fbresult::Position *>>>
             geometry;
         if (overview)
         {
@@ -421,8 +426,7 @@ class RouteAPI : public BaseAPI
         routeObject.add_legs(legs_vector);
         if (overview)
         {
-            mapbox::util::apply_visitor(GeometryVisitor<fbresult::RouteObjectBuilder>(routeObject),
+            std::visit(GeometryVisitor<fbresult::RouteObjectBuilder>(routeObject), geometry);
-                                        geometry);
         }
 
         return routeObject.Finish();
@@ -438,58 +442,58 @@ class RouteAPI : public BaseAPI
         if (requested_annotations & RouteParameters::AnnotationsType::Speed)
         {
             double prev_speed = 0;
-            speed =
+            speed = GetAnnotations<float>(
-                GetAnnotations<float>(fb_result,
+                fb_result,
-                                      leg_geometry,
+                leg_geometry,
-                                      [&prev_speed](const guidance::LegGeometry::Annotation &anno) {
+                [&prev_speed](const guidance::LegGeometry::Annotation &anno)
-                                          if (anno.duration < std::numeric_limits<float>::min())
+                {
-                                          {
+                    if (anno.duration < std::numeric_limits<float>::min())
-                                              return prev_speed;
+                    {
-                                          }
+                        return prev_speed;
-                                          else
+                    }
-                                          {
+                    else
-                                              auto speed =
+                    {
-                                                  round(anno.distance / anno.duration * 10.) / 10.;
+                        auto speed = std::round(anno.distance / anno.duration * 10.) / 10.;
-                                              prev_speed = speed;
+                        prev_speed = speed;
-                                              return util::json::clamp_float(speed);
+                        return util::json::clamp_float(speed);
-                                          }
+                    }
-                                      });
+                });
         }
 
         flatbuffers::Offset<flatbuffers::Vector<uint32_t>> duration;
         if (requested_annotations & RouteParameters::AnnotationsType::Duration)
         {
-            duration = GetAnnotations<uint32_t>(
+            duration = GetAnnotations<uint32_t>(fb_result,
-                fb_result, leg_geometry, [](const guidance::LegGeometry::Annotation &anno) {
+                                                leg_geometry,
-                    return anno.duration;
+                                                [](const guidance::LegGeometry::Annotation &anno)
-                });
+                                                { return anno.duration; });
         }
 
         flatbuffers::Offset<flatbuffers::Vector<uint32_t>> distance;
         if (requested_annotations & RouteParameters::AnnotationsType::Distance)
         {
-            distance = GetAnnotations<uint32_t>(
+            distance = GetAnnotations<uint32_t>(fb_result,
-                fb_result, leg_geometry, [](const guidance::LegGeometry::Annotation &anno) {
+                                                leg_geometry,
-                    return anno.distance;
+                                                [](const guidance::LegGeometry::Annotation &anno)
-                });
+                                                { return anno.distance; });
         }
 
         flatbuffers::Offset<flatbuffers::Vector<uint32_t>> weight;
         if (requested_annotations & RouteParameters::AnnotationsType::Weight)
         {
-            weight = GetAnnotations<uint32_t>(
+            weight = GetAnnotations<uint32_t>(fb_result,
-                fb_result, leg_geometry, [](const guidance::LegGeometry::Annotation &anno) {
+                                              leg_geometry,
-                    return anno.weight;
+                                              [](const guidance::LegGeometry::Annotation &anno)
-                });
+                                              { return anno.weight; });
         }
 
         flatbuffers::Offset<flatbuffers::Vector<uint32_t>> datasources;
         if (requested_annotations & RouteParameters::AnnotationsType::Datasources)
         {
-            datasources = GetAnnotations<uint32_t>(
+            datasources = GetAnnotations<uint32_t>(fb_result,
-                fb_result, leg_geometry, [](const guidance::LegGeometry::Annotation &anno) {
+                                                   leg_geometry,
-                    return anno.datasource;
+                                                   [](const guidance::LegGeometry::Annotation &anno)
-                });
+                                                   { return anno.datasource; });
         }
         std::vector<uint32_t> nodes;
         if (requested_annotations & RouteParameters::AnnotationsType::Nodes)
@@ -639,7 +643,7 @@ class RouteAPI : public BaseAPI
         stepBuilder.add_rotary_pronunciation(rotary_pronunciation_string);
         stepBuilder.add_intersections(intersections_vector);
         stepBuilder.add_maneuver(maneuver_buffer);
-        mapbox::util::apply_visitor(GeometryVisitor<fbresult::StepBuilder>(stepBuilder), geometry);
+        std::visit(GeometryVisitor<fbresult::StepBuilder>(stepBuilder), geometry);
         return stepBuilder.Finish();
     };
 
@@ -653,7 +657,8 @@ class RouteAPI : public BaseAPI
             step.intersections.begin(),
             step.intersections.end(),
             intersections.begin(),
-            [&fb_result, this](const guidance::IntermediateIntersection &intersection) {
+            [&fb_result, this](const guidance::IntermediateIntersection &intersection)
+            {
                 std::vector<flatbuffers::Offset<fbresult::Lane>> lanes;
                 if (json::detail::hasValidLanes(intersection))
                 {
@@ -681,11 +686,11 @@ class RouteAPI : public BaseAPI
                 auto bearings_vector = fb_result.CreateVector(intersection.bearings);
                 std::vector<flatbuffers::Offset<flatbuffers::String>> classes;
                 classes.resize(intersection.classes.size());
-                std::transform(
+                std::transform(intersection.classes.begin(),
-                    intersection.classes.begin(),
+                               intersection.classes.end(),
-                    intersection.classes.end(),
+                               classes.begin(),
-                    classes.begin(),
+                               [&fb_result](const std::string &cls)
-                    [&fb_result](const std::string &cls) { return fb_result.CreateString(cls); });
+                               { return fb_result.CreateString(cls); });
                 auto classes_vector = fb_result.CreateVector(classes);
                 auto entry_vector = fb_result.CreateVector(intersection.entry);
 
@@ -720,9 +725,10 @@ class RouteAPI : public BaseAPI
 
         std::vector<util::json::Value> step_geometries;
         const auto total_step_count =
-            std::accumulate(legs.begin(), legs.end(), 0, [](const auto &v, const auto &leg) {
+            std::accumulate(legs.begin(),
-                return v + leg.steps.size();
+                            legs.end(),
-            });
+                            0,
+                            [](const auto &v, const auto &leg) { return v + leg.steps.size(); });
         step_geometries.reserve(total_step_count);
 
         for (const auto idx : util::irange<std::size_t>(0UL, legs.size()))
@@ -733,7 +739,8 @@ class RouteAPI : public BaseAPI
                 legs[idx].steps.begin(),
                 legs[idx].steps.end(),
                 std::back_inserter(step_geometries),
-                [this, &leg_geometry](const guidance::RouteStep &step) {
+                [this, &leg_geometry](const guidance::RouteStep &step)
+                {
                     if (parameters.geometries == RouteParameters::GeometriesType::Polyline)
                     {
                         return static_cast<util::json::Value>(json::makePolyline<100000>(
@@ -778,7 +785,9 @@ class RouteAPI : public BaseAPI
                 {
                     double prev_speed = 0;
                     annotation.values["speed"] = GetAnnotations(
-                        leg_geometry, [&prev_speed](const guidance::LegGeometry::Annotation &anno) {
+                        leg_geometry,
+                        [&prev_speed](const guidance::LegGeometry::Annotation &anno)
+                        {
                             if (anno.duration < std::numeric_limits<double>::min())
                             {
                                 return prev_speed;
@@ -794,17 +803,17 @@ class RouteAPI : public BaseAPI
 
                 if (requested_annotations & RouteParameters::AnnotationsType::Duration)
                 {
-                    annotation.values["duration"] = GetAnnotations(
+                    annotation.values["duration"] =
-                        leg_geometry, [](const guidance::LegGeometry::Annotation &anno) {
+                        GetAnnotations(leg_geometry,
-                            return anno.duration;
+                                       [](const guidance::LegGeometry::Annotation &anno)
-                        });
+                                       { return anno.duration; });
                 }
                 if (requested_annotations & RouteParameters::AnnotationsType::Distance)
                 {
-                    annotation.values["distance"] = GetAnnotations(
+                    annotation.values["distance"] =
-                        leg_geometry, [](const guidance::LegGeometry::Annotation &anno) {
+                        GetAnnotations(leg_geometry,
-                            return anno.distance;
+                                       [](const guidance::LegGeometry::Annotation &anno)
-                        });
+                                       { return anno.distance; });
                 }
                 if (requested_annotations & RouteParameters::AnnotationsType::Weight)
                 {
@@ -814,10 +823,10 @@ class RouteAPI : public BaseAPI
                 }
                 if (requested_annotations & RouteParameters::AnnotationsType::Datasources)
                 {
-                    annotation.values["datasources"] = GetAnnotations(
+                    annotation.values["datasources"] =
-                        leg_geometry, [](const guidance::LegGeometry::Annotation &anno) {
+                        GetAnnotations(leg_geometry,
-                            return anno.datasource;
+                                       [](const guidance::LegGeometry::Annotation &anno)
-                        });
+                                       { return anno.datasource; });
                 }
                 if (requested_annotations & RouteParameters::AnnotationsType::Nodes)
                 {

include/engine/api/route_parameters.hpp

@@ -83,7 +83,7 @@ struct RouteParameters : public BaseParameters
                     const GeometriesType geometries_,
                     const OverviewType overview_,
                     const boost::optional<bool> continue_straight_,
-                    Args &&... args_)
+                    Args &&...args_)
         // Once we perfectly-forward `args` (see #2990) this constructor can delegate to the one
         // below.
         : BaseParameters{std::forward<Args>(args_)...}, steps{steps_}, alternatives{alternatives_},
@@ -101,7 +101,7 @@ struct RouteParameters : public BaseParameters
                     const GeometriesType geometries_,
                     const OverviewType overview_,
                     const boost::optional<bool> continue_straight_,
-                    Args &&... args_)
+                    Args &&...args_)
         : BaseParameters{std::forward<Args>(args_)...}, steps{steps_}, alternatives{alternatives_},
           number_of_alternatives{alternatives_ ? 1u : 0u}, annotations{annotations_},
           annotations_type{annotations_ ? AnnotationsType::All : AnnotationsType::None},
@@ -119,7 +119,7 @@ struct RouteParameters : public BaseParameters
                     const GeometriesType geometries_,
                     const OverviewType overview_,
                     const boost::optional<bool> continue_straight_,
-                    Args &&... args_)
+                    Args &&...args_)
         : BaseParameters{std::forward<Args>(args_)...}, steps{steps_}, alternatives{alternatives_},
           number_of_alternatives{alternatives_ ? 1u : 0u},
           annotations{annotations_ != AnnotationsType::None}, annotations_type{annotations_},
@@ -137,7 +137,7 @@ struct RouteParameters : public BaseParameters
                     const OverviewType overview_,
                     const boost::optional<bool> continue_straight_,
                     std::vector<std::size_t> waypoints_,
-                    const Args &&... args_)
+                    const Args &&...args_)
         : BaseParameters{std::forward<Args>(args_)...}, steps{steps_}, alternatives{alternatives_},
           number_of_alternatives{alternatives_ ? 1u : 0u}, annotations{annotations_},
           annotations_type{annotations_ ? AnnotationsType::All : AnnotationsType::None},
@@ -155,7 +155,7 @@ struct RouteParameters : public BaseParameters
                     const OverviewType overview_,
                     const boost::optional<bool> continue_straight_,
                     std::vector<std::size_t> waypoints_,
-                    Args &&... args_)
+                    Args &&...args_)
         : BaseParameters{std::forward<Args>(args_)...}, steps{steps_}, alternatives{alternatives_},
           number_of_alternatives{alternatives_ ? 1u : 0u}, annotations{annotations_ !=
                                                                        AnnotationsType::None},
@@ -180,9 +180,9 @@ struct RouteParameters : public BaseParameters
         const auto coordinates_ok = coordinates.size() >= 2;
         const auto base_params_ok = BaseParameters::IsValid();
         const auto valid_waypoints =
-            std::all_of(waypoints.begin(), waypoints.end(), [this](const auto &w) {
+            std::all_of(waypoints.begin(),
-                return w < coordinates.size();
+                        waypoints.end(),
-            });
+                        [this](const auto &w) { return w < coordinates.size(); });
         return coordinates_ok && base_params_ok && valid_waypoints;
     }
 };

include/engine/api/table_api.hpp

@@ -50,14 +50,14 @@ class TableAPI final : public BaseAPI
                  const std::vector<TableCellRef> &fallback_speed_cells,
                  osrm::engine::api::ResultT &response) const
     {
-        if (response.is<flatbuffers::FlatBufferBuilder>())
+        if (std::holds_alternative<flatbuffers::FlatBufferBuilder>(response))
         {
-            auto &fb_result = response.get<flatbuffers::FlatBufferBuilder>();
+            auto &fb_result = std::get<flatbuffers::FlatBufferBuilder>(response);
             MakeResponse(tables, candidates, fallback_speed_cells, fb_result);
         }
         else
         {
-            auto &json_result = response.get<util::json::Object>();
+            auto &json_result = std::get<util::json::Object>(response);
             MakeResponse(tables, candidates, fallback_speed_cells, json_result);
         }
     }
@@ -245,9 +245,8 @@ class TableAPI final : public BaseAPI
 
         boost::range::transform(candidates,
                                 std::back_inserter(waypoints),
-                                [this, &builder](const PhantomNodeCandidates &candidates) {
+                                [this, &builder](const PhantomNodeCandidates &candidates)
-                                    return BaseAPI::MakeWaypoint(&builder, candidates)->Finish();
+                                { return BaseAPI::MakeWaypoint(&builder, candidates)->Finish(); });
-                                });
         return builder.CreateVector(waypoints);
     }
 
@@ -261,7 +260,8 @@ class TableAPI final : public BaseAPI
         boost::range::transform(
             indices,
             std::back_inserter(waypoints),
-            [this, &builder, &candidates](const std::size_t idx) {
+            [this, &builder, &candidates](const std::size_t idx)
+            {
                 BOOST_ASSERT(idx < candidates.size());
                 return BaseAPI::MakeWaypoint(&builder, candidates[idx])->Finish();
             });
@@ -274,14 +274,17 @@ class TableAPI final : public BaseAPI
     {
         std::vector<float> distance_table;
         distance_table.resize(values.size());
-        std::transform(
+        std::transform(values.begin(),
-            values.begin(), values.end(), distance_table.begin(), [](const EdgeDuration duration) {
+                       values.end(),
-                if (duration == MAXIMAL_EDGE_DURATION)
+                       distance_table.begin(),
-                {
+                       [](const EdgeDuration duration)
-                    return 0.;
+                       {
-                }
+                           if (duration == MAXIMAL_EDGE_DURATION)
-                return from_alias<double>(duration) / 10.;
+                           {
-            });
+                               return 0.;
+                           }
+                           return from_alias<double>(duration) / 10.;
+                       });
         return builder.CreateVector(distance_table);
     }
 
@@ -291,14 +294,17 @@ class TableAPI final : public BaseAPI
     {
         std::vector<float> duration_table;
         duration_table.resize(values.size());
-        std::transform(
+        std::transform(values.begin(),
-            values.begin(), values.end(), duration_table.begin(), [](const EdgeDistance distance) {
+                       values.end(),
-                if (distance == INVALID_EDGE_DISTANCE)
+                       duration_table.begin(),
-                {
+                       [](const EdgeDistance distance)
-                    return 0.;
+                       {
-                }
+                           if (distance == INVALID_EDGE_DISTANCE)
-                return std::round(from_alias<double>(distance) * 10) / 10.;
+                           {
-            });
+                               return 0.;
+                           }
+                           return std::round(from_alias<double>(distance) * 10) / 10.;
+                       });
         return builder.CreateVector(duration_table);
     }
 
@@ -308,11 +314,13 @@ class TableAPI final : public BaseAPI
     {
         std::vector<uint32_t> fb_table;
         fb_table.reserve(fallback_speed_cells.size());
-        std::for_each(
+        std::for_each(fallback_speed_cells.begin(),
-            fallback_speed_cells.begin(), fallback_speed_cells.end(), [&](const auto &cell) {
+                      fallback_speed_cells.end(),
-                fb_table.push_back(cell.row);
+                      [&](const auto &cell)
-                fb_table.push_back(cell.column);
+                      {
-            });
+                          fb_table.push_back(cell.row);
+                          fb_table.push_back(cell.column);
+                      });
         return builder.CreateVector(fb_table);
     }
 
@@ -325,9 +333,8 @@ class TableAPI final : public BaseAPI
 
         boost::range::transform(candidates,
                                 std::back_inserter(json_waypoints.values),
-                                [this](const PhantomNodeCandidates &candidates) {
+                                [this](const PhantomNodeCandidates &candidates)
-                                    return BaseAPI::MakeWaypoint(candidates);
+                                { return BaseAPI::MakeWaypoint(candidates); });
-                                });
         return json_waypoints;
     }
 
@@ -338,7 +345,8 @@ class TableAPI final : public BaseAPI
         json_waypoints.values.reserve(indices.size());
         boost::range::transform(indices,
                                 std::back_inserter(json_waypoints.values),
-                                [this, &candidates](const std::size_t idx) {
+                                [this, &candidates](const std::size_t idx)
+                                {
                                     BOOST_ASSERT(idx < candidates.size());
                                     return BaseAPI::MakeWaypoint(candidates[idx]);
                                 });
@@ -359,7 +367,8 @@ class TableAPI final : public BaseAPI
             std::transform(row_begin_iterator,
                            row_end_iterator,
                            json_row.values.begin(),
-                           [](const EdgeDuration duration) {
+                           [](const EdgeDuration duration)
+                           {
                                if (duration == MAXIMAL_EDGE_DURATION)
                                {
                                    return util::json::Value(util::json::Null());
@@ -368,7 +377,8 @@ class TableAPI final : public BaseAPI
                                return util::json::Value(
                                    util::json::Number(from_alias<double>(duration) / 10.));
                            });
-            json_table.values.push_back(std::move(json_row));
+
+            json_table.values.push_back(util::json::Value{json_row});
         }
         return json_table;
     }
@@ -387,7 +397,8 @@ class TableAPI final : public BaseAPI
             std::transform(row_begin_iterator,
                            row_end_iterator,
                            json_row.values.begin(),
-                           [](const EdgeDistance distance) {
+                           [](const EdgeDistance distance)
+                           {
                                if (distance == INVALID_EDGE_DISTANCE)
                                {
                                    return util::json::Value(util::json::Null());
@@ -396,7 +407,7 @@ class TableAPI final : public BaseAPI
                                return util::json::Value(util::json::Number(
                                    std::round(from_alias<double>(distance) * 10) / 10.));
                            });
-            json_table.values.push_back(std::move(json_row));
+            json_table.values.push_back(util::json::Value{json_row});
         }
         return json_table;
     }
@@ -406,11 +417,16 @@ class TableAPI final : public BaseAPI
     {
         util::json::Array json_table;
         std::for_each(
-            fallback_speed_cells.begin(), fallback_speed_cells.end(), [&](const auto &cell) {
+            fallback_speed_cells.begin(),
+            fallback_speed_cells.end(),
+            [&](const auto &cell)
+            {
                 util::json::Array row;
-                row.values.push_back(util::json::Number(cell.row));
+                util::json::Value jCellRow{util::json::Number(static_cast<double>(cell.row))};
-                row.values.push_back(util::json::Number(cell.column));
+                util::json::Value jCellColumn{util::json::Number(static_cast<double>(cell.column))};
-                json_table.values.push_back(std::move(row));
+                row.values.push_back(jCellRow);
+                row.values.push_back(jCellColumn);
+                json_table.values.push_back(util::json::Value{row});
             });
         return json_table;
     }

include/engine/api/table_parameters.hpp

@@ -81,7 +81,7 @@ struct TableParameters : public BaseParameters
     template <typename... Args>
     TableParameters(std::vector<std::size_t> sources_,
                     std::vector<std::size_t> destinations_,
-                    Args &&... args_)
+                    Args &&...args_)
         : BaseParameters{std::forward<Args>(args_)...}, sources{std::move(sources_)},
           destinations{std::move(destinations_)}
     {
@@ -91,7 +91,7 @@ struct TableParameters : public BaseParameters
     TableParameters(std::vector<std::size_t> sources_,
                     std::vector<std::size_t> destinations_,
                     const AnnotationsType annotations_,
-                    Args &&... args_)
+                    Args &&...args_)
         : BaseParameters{std::forward<Args>(args_)...}, sources{std::move(sources_)},
           destinations{std::move(destinations_)}, annotations{annotations_}
     {
@@ -104,7 +104,7 @@ struct TableParameters : public BaseParameters
                     double fallback_speed_,
                     FallbackCoordinateType fallback_coordinate_type_,
                     double scale_factor_,
-                    Args &&... args_)
+                    Args &&...args_)
         : BaseParameters{std::forward<Args>(args_)...}, sources{std::move(sources_)},
           destinations{std::move(destinations_)}, fallback_speed{fallback_speed_},
           fallback_coordinate_type{fallback_coordinate_type_}, annotations{annotations_},

include/engine/api/trip_api.hpp

@@ -27,14 +27,14 @@ class TripAPI final : public RouteAPI
     {
         BOOST_ASSERT(sub_trips.size() == sub_routes.size());
 
-        if (response.is<flatbuffers::FlatBufferBuilder>())
+        if (std::holds_alternative<flatbuffers::FlatBufferBuilder>(response))
         {
-            auto &fb_result = response.get<flatbuffers::FlatBufferBuilder>();
+            auto &fb_result = std::get<flatbuffers::FlatBufferBuilder>(response);
             MakeResponse(sub_trips, sub_routes, candidates, fb_result);
         }
         else
         {
-            auto &json_result = response.get<util::json::Object>();
+            auto &json_result = std::get<util::json::Object>(response);
             MakeResponse(sub_trips, sub_routes, candidates, json_result);
         }
     }
@@ -50,10 +50,10 @@ class TripAPI final : public RouteAPI
             data_version_string = fb_result.CreateString(data_timestamp);
         }
 
-        auto response =
+        auto response = MakeFBResponse(sub_routes,
-            MakeFBResponse(sub_routes, fb_result, [this, &fb_result, &sub_trips, &candidates]() {
+                                       fb_result,
-                return MakeWaypoints(fb_result, sub_trips, candidates);
+                                       [this, &fb_result, &sub_trips, &candidates]()
-            });
+                                       { return MakeWaypoints(fb_result, sub_trips, candidates); });
 
         if (!data_timestamp.empty())
         {

include/engine/api/trip_parameters.hpp

@@ -60,7 +60,7 @@ struct TripParameters : public RouteParameters
     TripParameters(SourceType source_,
                    DestinationType destination_,
                    bool roundtrip_,
-                   Args &&... args_)
+                   Args &&...args_)
         : RouteParameters{std::forward<Args>(args_)...}, source{source_},
           destination{destination_}, roundtrip{roundtrip_}
     {

include/engine/datafacade/algorithm_datafacade.hpp

@@ -55,7 +55,7 @@ template <> class AlgorithmDataFacade<CH>
 
     virtual EdgeID FindSmallestEdge(const NodeID edge_based_node_from,
                                     const NodeID edge_based_node_to,
-                                    const std::function<bool(EdgeData)> filter) const = 0;
+                                    const std::function<bool(const EdgeData &)> &filter) const = 0;
 };
 
 template <> class AlgorithmDataFacade<MLD>

include/engine/datafacade/contiguous_internalmem_datafacade.hpp

@@ -130,9 +130,10 @@ class ContiguousInternalMemoryAlgorithmDataFacade<CH> : public datafacade::Algor
             edge_based_node_from, edge_based_node_to, result);
     }
 
-    EdgeID FindSmallestEdge(const NodeID edge_based_node_from,
+    EdgeID
-                            const NodeID edge_based_node_to,
+    FindSmallestEdge(const NodeID edge_based_node_from,
-                            std::function<bool(EdgeData)> filter) const override final
+                     const NodeID edge_based_node_to,
+                     const std::function<bool(const EdgeData &)> &filter) const override final
     {
         return m_query_graph.FindSmallestEdge(edge_based_node_from, edge_based_node_to, filter);
     }
@@ -375,7 +376,7 @@ class ContiguousInternalMemoryDataFacadeBase : public BaseDataFacade
         BOOST_ASSERT(m_geospatial_query.get());
 
         return m_geospatial_query->NearestPhantomNodes(
-            input_coordinate, approach, boost::none, max_distance, bearing, use_all_edges);
+            input_coordinate, approach, max_distance, bearing, use_all_edges);
     }
 
     std::vector<PhantomNodeWithDistance>
@@ -440,9 +441,11 @@ class ContiguousInternalMemoryDataFacadeBase : public BaseDataFacade
     {
         auto indexes = extractor::getClassIndexes(class_data);
         std::vector<std::string> classes(indexes.size());
-        std::transform(indexes.begin(), indexes.end(), classes.begin(), [this](const auto index) {
+        std::transform(indexes.begin(),
-            return m_profile_properties->GetClassName(index);
+                       indexes.end(),
-        });
+                       classes.begin(),
+                       [this](const auto index)
+                       { return m_profile_properties->GetClassName(index); });
 
         return classes;
     }
@@ -600,15 +603,19 @@ class ContiguousInternalMemoryDataFacadeBase : public BaseDataFacade
         auto found_range = std::equal_range(
             m_maneuver_overrides.begin(), m_maneuver_overrides.end(), edge_based_node_id, Comp{});
 
-        std::for_each(found_range.first, found_range.second, [&](const auto &override) {
+        std::for_each(found_range.first,
-            std::vector<NodeID> sequence(
+                      found_range.second,
-                m_maneuver_override_node_sequences.begin() + override.node_sequence_offset_begin,
+                      [&](const auto &override)
-                m_maneuver_override_node_sequences.begin() + override.node_sequence_offset_end);
+                      {
-            results.push_back(extractor::ManeuverOverride{std::move(sequence),
+                          std::vector<NodeID> sequence(m_maneuver_override_node_sequences.begin() +
-                                                          override.instruction_node,
+                                                           override.node_sequence_offset_begin,
-                                                          override.override_type,
+                                                       m_maneuver_override_node_sequences.begin() +
-                                                          override.direction});
+                                                           override.node_sequence_offset_end);
-        });
+                          results.push_back(extractor::ManeuverOverride{std::move(sequence),
+                                                                        override.instruction_node,
+                                                                        override.override_type,
+                                                                        override.direction});
+                      });
         return results;
     }
 };

include/engine/engine_config.hpp

@@ -54,14 +54,10 @@ namespace osrm::engine
  *
  * In addition, shared memory can be used for datasets loaded with osrm-datastore.
  *
- * You can chose between three algorithms:
+ * You can chose between two algorithms:
  *  - Algorithm::CH
  *      Contraction Hierarchies, extremely fast queries but slow pre-processing. The default right
  * now.
- *  - Algorithm::CoreCH
- *      Deprecated, to be removed in v6.0
- *      Contraction Hierachies with partial contraction for faster pre-processing but slower
- * queries.
  *  - Algorithm::MLD
  *      Multi Level Dijkstra, moderately fast in both pre-processing and query.
  *
@@ -74,7 +70,6 @@ struct EngineConfig final
     enum class Algorithm
     {
         CH,
-        CoreCH, // Deprecated, will be removed in v6.0
         MLD
     };
 

include/engine/geospatial_query.hpp

@@ -12,6 +12,8 @@
 
 #include "osrm/coordinate.hpp"
 
+#include <boost/optional.hpp>
+
 #include <algorithm>
 #include <cmath>
 #include <iterator>
@@ -47,12 +49,42 @@ template <typename RTreeT, typename DataFacadeT> class GeospatialQuery
         return rtree.SearchInBox(bbox);
     }
 
+    std::vector<PhantomNodeWithDistance>
+    NearestPhantomNodes(const util::Coordinate input_coordinate,
+                        const Approach approach,
+                        const double max_distance,
+                        const boost::optional<Bearing> bearing_with_range,
+                        const boost::optional<bool> use_all_edges) const
+    {
+        auto results = rtree.SearchInRange(
+            input_coordinate,
+            max_distance,
+            [this, approach, &input_coordinate, &bearing_with_range, &use_all_edges, max_distance](
+                const CandidateSegment &segment)
+            {
+                auto invalidDistance =
+                    CheckSegmentDistance(input_coordinate, segment, max_distance);
+                if (invalidDistance)
+                {
+                    return std::make_pair(false, false);
+                }
+                auto valid = CheckSegmentExclude(segment) &&
+                             CheckApproach(input_coordinate, segment, approach) &&
+                             (use_all_edges ? HasValidEdge(segment, *use_all_edges)
+                                            : HasValidEdge(segment)) &&
+                             (bearing_with_range ? CheckSegmentBearing(segment, *bearing_with_range)
+                                                 : std::make_pair(true, true));
+                return valid;
+            });
+        return MakePhantomNodes(input_coordinate, results);
+    }
+
     // Returns max_results nearest PhantomNodes that are valid within the provided parameters.
     // Does not filter by small/big component!
     std::vector<PhantomNodeWithDistance>
     NearestPhantomNodes(const util::Coordinate input_coordinate,
                         const Approach approach,
-                        const boost::optional<size_t> max_results,
+                        const size_t max_results,
                         const boost::optional<double> max_distance,
                         const boost::optional<Bearing> bearing_with_range,
                         const boost::optional<bool> use_all_edges) const
@@ -60,7 +92,8 @@ template <typename RTreeT, typename DataFacadeT> class GeospatialQuery
         auto results = rtree.Nearest(
             input_coordinate,
             [this, approach, &input_coordinate, &bearing_with_range, &use_all_edges](
-                const CandidateSegment &segment) {
+                const CandidateSegment &segment)
+            {
                 auto valid = CheckSegmentExclude(segment) &&
                              CheckApproach(input_coordinate, segment, approach) &&
                              (use_all_edges ? HasValidEdge(segment, *use_all_edges)
@@ -69,9 +102,10 @@ template <typename RTreeT, typename DataFacadeT> class GeospatialQuery
                                                  : std::make_pair(true, true));
                 return valid;
             },
-            [this, &max_distance, &max_results, input_coordinate](const std::size_t num_results,
+            [this, &max_distance, max_results, input_coordinate](const std::size_t num_results,
-                                                                  const CandidateSegment &segment) {
+                                                                 const CandidateSegment &segment)
-                return (max_results && num_results >= *max_results) ||
+            {
+                return (num_results >= max_results) ||
                        (max_distance && max_distance != -1.0 &&
                         CheckSegmentDistance(input_coordinate, segment, *max_distance));
             });
@@ -107,7 +141,8 @@ template <typename RTreeT, typename DataFacadeT> class GeospatialQuery
              &big_component_coord,
              &big_component_distance,
              &use_all_edges,
-             &bearing_with_range](const CandidateSegment &segment) {
+             &bearing_with_range](const CandidateSegment &segment)
+            {
                 auto is_big_component = !IsTinyComponent(segment);
                 auto not_nearest =
                     has_nearest && segment.fixed_projected_coordinate != nearest_coord;
@@ -159,7 +194,8 @@ template <typename RTreeT, typename DataFacadeT> class GeospatialQuery
                 return use_candidate;
             },
             [this, &has_big_component, &max_distance, input_coordinate, &big_component_distance](
-                const std::size_t /*num_results*/, const CandidateSegment &segment) {
+                const std::size_t /*num_results*/, const CandidateSegment &segment)
+            {
                 auto distance = GetSegmentDistance(input_coordinate, segment);
                 auto further_than_big_component = distance > big_component_distance;
                 auto no_more_candidates = has_big_component && further_than_big_component;
@@ -190,13 +226,17 @@ template <typename RTreeT, typename DataFacadeT> class GeospatialQuery
         PhantomNodeCandidates nearest_phantoms;
         PhantomNodeCandidates big_component_phantoms;
 
-        const auto add_to_candidates = [this, &input_coordinate](PhantomNodeCandidates &candidates,
+        const auto add_to_candidates =
-                                                                 const EdgeData data) {
+            [this, &input_coordinate](PhantomNodeCandidates &candidates, const EdgeData data)
+        {
             auto candidate_it =
-                std::find_if(candidates.begin(), candidates.end(), [&](const PhantomNode &node) {
+                std::find_if(candidates.begin(),
-                    return data.forward_segment_id.id == node.forward_segment_id.id &&
+                             candidates.end(),
-                           data.reverse_segment_id.id == node.reverse_segment_id.id;
+                             [&](const PhantomNode &node)
-                });
+                             {
+                                 return data.forward_segment_id.id == node.forward_segment_id.id &&
+                                        data.reverse_segment_id.id == node.reverse_segment_id.id;
+                             });
             if (candidate_it == candidates.end())
             {
                 // First candidate from this segment
@@ -259,17 +299,20 @@ template <typename RTreeT, typename DataFacadeT> class GeospatialQuery
             }
         };
 
-        std::for_each(results.begin(), results.end(), [&](const CandidateSegment &segment) {
+        std::for_each(results.begin(),
-            if (segment.fixed_projected_coordinate == nearest_coord)
+                      results.end(),
-            {
+                      [&](const CandidateSegment &segment)
-                add_to_candidates(nearest_phantoms, segment.data);
+                      {
-            }
+                          if (segment.fixed_projected_coordinate == nearest_coord)
-            else
+                          {
-            {
+                              add_to_candidates(nearest_phantoms, segment.data);
-                // Can only be from a big component for the alternative candidates
+                          }
-                add_to_candidates(big_component_phantoms, segment.data);
+                          else
-            }
+                          {
-        });
+                              // Can only be from a big component for the alternative candidates
+                              add_to_candidates(big_component_phantoms, segment.data);
+                          }
+                      });
         return std::make_pair(std::move(nearest_phantoms), std::move(big_component_phantoms));
     }
 
@@ -281,9 +324,8 @@ template <typename RTreeT, typename DataFacadeT> class GeospatialQuery
         std::transform(results.begin(),
                        results.end(),
                        distance_and_phantoms.begin(),
-                       [this, &input_coordinate](const CandidateSegment &segment) {
+                       [this, &input_coordinate](const CandidateSegment &segment)
-                           return MakePhantomNode(input_coordinate, segment.data);
+                       { return MakePhantomNode(input_coordinate, segment.data); });
-                       });
         return distance_and_phantoms;
     }
 
@@ -400,9 +442,8 @@ template <typename RTreeT, typename DataFacadeT> class GeospatialQuery
         }
 
         // check phantom node segments validity
-        auto areSegmentsValid = [](auto first, auto last) -> bool {
+        auto areSegmentsValid = [](auto first, auto last) -> bool
-            return std::find(first, last, INVALID_SEGMENT_WEIGHT) == last;
+        { return std::find(first, last, INVALID_SEGMENT_WEIGHT) == last; };
-        };
         bool is_forward_valid_source =
             areSegmentsValid(forward_weights.begin(), forward_weights.end());
         bool is_forward_valid_target = areSegmentsValid(

include/engine/guidance/assemble_leg.hpp

@@ -43,7 +43,8 @@ std::array<std::uint32_t, SegmentNumber> summarizeRoute(const datafacade::BaseDa
                                                         const bool target_traversed_in_reverse)
 {
     // merges segments with same name id
-    const auto collapse_segments = [](std::vector<NamedSegment> &segments) {
+    const auto collapse_segments = [](std::vector<NamedSegment> &segments)
+    {
         auto out = segments.begin();
         auto end = segments.end();
 
@@ -75,7 +76,8 @@ std::array<std::uint32_t, SegmentNumber> summarizeRoute(const datafacade::BaseDa
     std::transform(route_data.begin(),
                    route_data.end(),
                    segments.begin(),
-                   [&index, &facade](const PathData &point) {
+                   [&index, &facade](const PathData &point)
+                   {
                        return NamedSegment{point.duration_until_turn,
                                            index++,
                                            facade.GetNameIndex(point.from_edge_based_node)};
@@ -87,33 +89,37 @@ std::array<std::uint32_t, SegmentNumber> summarizeRoute(const datafacade::BaseDa
     if (target_duration > EdgeDuration{1})
         segments.push_back({target_duration, index++, facade.GetNameIndex(target_node_id)});
     // this makes sure that the segment with the lowest position comes first
-    std::sort(
+    std::sort(segments.begin(),
-        segments.begin(), segments.end(), [](const NamedSegment &lhs, const NamedSegment &rhs) {
+              segments.end(),
-            return lhs.name_id < rhs.name_id ||
+              [](const NamedSegment &lhs, const NamedSegment &rhs)
-                   (lhs.name_id == rhs.name_id && lhs.position < rhs.position);
+              {
-        });
+                  return lhs.name_id < rhs.name_id ||
+                         (lhs.name_id == rhs.name_id && lhs.position < rhs.position);
+              });
     auto new_end = collapse_segments(segments);
     segments.resize(new_end - segments.begin());
 
     // Filter out segments with an empty name (name_id == 0)
-    new_end = std::remove_if(segments.begin(), segments.end(), [](const NamedSegment &segment) {
+    new_end = std::remove_if(segments.begin(),
-        return segment.name_id == 0;
+                             segments.end(),
-    });
+                             [](const NamedSegment &segment) { return segment.name_id == 0; });
     segments.resize(new_end - segments.begin());
 
     // sort descending
-    std::sort(
+    std::sort(segments.begin(),
-        segments.begin(), segments.end(), [](const NamedSegment &lhs, const NamedSegment &rhs) {
+              segments.end(),
-            return lhs.duration > rhs.duration ||
+              [](const NamedSegment &lhs, const NamedSegment &rhs)
-                   (lhs.duration == rhs.duration && lhs.position < rhs.position);
+              {
-        });
+                  return lhs.duration > rhs.duration ||
+                         (lhs.duration == rhs.duration && lhs.position < rhs.position);
+              });
 
     // make sure the segments are sorted by position
     segments.resize(std::min(segments.size(), SegmentNumber));
-    std::sort(
+    std::sort(segments.begin(),
-        segments.begin(), segments.end(), [](const NamedSegment &lhs, const NamedSegment &rhs) {
+              segments.end(),
-            return lhs.position < rhs.position;
+              [](const NamedSegment &lhs, const NamedSegment &rhs)
-        });
+              { return lhs.position < rhs.position; });
 
     std::array<std::uint32_t, SegmentNumber> summary;
     std::fill(summary.begin(), summary.end(), EMPTY_NAMEID);
@@ -138,7 +144,8 @@ inline std::string assembleSummary(const datafacade::BaseDataFacade &facade,
 
     // transform a name_id into a string containing either the name, or -if the name is empty-
     // the reference.
-    const auto name_id_to_string = [&](const NameID name_id) {
+    const auto name_id_to_string = [&](const NameID name_id)
+    {
         const auto name = facade.GetNameForID(name_id);
         if (!name.empty())
             return std::string(name);
@@ -178,14 +185,16 @@ inline RouteLeg assembleLeg(const datafacade::BaseDataFacade &facade,
     const auto target_weight =
         (target_traversed_in_reverse ? target_node.reverse_weight : target_node.forward_weight);
 
-    auto duration = std::accumulate(
+    auto duration = std::accumulate(route_data.begin(),
-        route_data.begin(), route_data.end(), 0, [](const double sum, const PathData &data) {
+                                    route_data.end(),
-            return sum + from_alias<double>(data.duration_until_turn);
+                                    0,
-        });
+                                    [](const double sum, const PathData &data)
-    auto weight = std::accumulate(
+                                    { return sum + from_alias<double>(data.duration_until_turn); });
-        route_data.begin(), route_data.end(), 0, [](const double sum, const PathData &data) {
+    auto weight = std::accumulate(route_data.begin(),
-            return sum + from_alias<double>(data.weight_until_turn);
+                                  route_data.end(),
-        });
+                                  0,
+                                  [](const double sum, const PathData &data)
+                                  { return sum + from_alias<double>(data.weight_until_turn); });
 
     //                 s
     //                 |

include/engine/guidance/collapse_scenario_detection.hpp

@@ -16,7 +16,7 @@ bool basicCollapsePreconditions(const RouteStepIterator first,
 
 // Staggered intersection are very short zig-zags of a few meters.
 // We do not want to announce these short left-rights or right-lefts:
-// 
+//  
 //      * -> b      a -> *
 //      |       or       |       becomes  a   ->   b
 // a -> *                * -> b
@@ -26,7 +26,7 @@ bool isStaggeredIntersection(const RouteStepIterator step_prior_to_intersection,
 
 // Two two turns following close after another, we can announce them as a U-Turn if both end up
 // involving the same (segregated) road.
-// 
+//  
 // b < - y
 //       |      will be represented by at x, turn around instead of turn left at x, turn left at y
 // a - > x
@@ -42,11 +42,11 @@ bool isNameOszillation(const RouteStepIterator step_prior_to_intersection,
 
 // Sometimes, segments names don't match the perceived turns. We try to detect these additional
 // name changes and issue a combined turn.
-// 
+//  
 //  |  e  |
 // a - b - c
 //         d
-// 
+//  
 // can have `a-b` as one name, `b-c-d` as a second. At `b` we would issue a new name, even though
 // the road turns right after. The offset would only be there due to the broad road at `e`
 bool maneuverPreceededByNameChange(const RouteStepIterator step_prior_to_intersection,
@@ -73,11 +73,11 @@ bool doubleChoiceless(const RouteStepIterator step_entering_intersection,
 
 // Due to obvious detection, sometimes we can have straight turns followed by a different turn right
 // next to each other. We combine both turns into one, if the second turn is without choice
-// 
+//  
-//         e
+//          e
 // a - b - c
 //       ' d
-// 
+//  
 // with a main road `abd`, the turn `continue straight` at `b` and `turn left at `c` will become a
 // `turn left` at `b`
 bool straightTurnFollowedByChoiceless(const RouteStepIterator step_entering_intersection,

include/engine/guidance/collapse_turns.hpp

@@ -1,7 +1,6 @@
 #ifndef OSRM_ENGINE_GUIDANCE_COLLAPSE_HPP
 
 #include "engine/guidance/route_step.hpp"
-#include "util/attributes.hpp"
 
 #include <type_traits>
 #include <vector>
@@ -12,16 +11,15 @@ namespace osrm::engine::guidance
 // Multiple possible reasons can result in unnecessary/confusing instructions
 // Collapsing such turns into a single turn instruction, we give a clearer
 // set of instructions that is not cluttered by unnecessary turns/name changes.
-OSRM_ATTR_WARN_UNUSED
+[[nodiscard]] std::vector<RouteStep> collapseTurnInstructions(std::vector<RouteStep> steps);
-std::vector<RouteStep> collapseTurnInstructions(std::vector<RouteStep> steps);
 
 // Multiple possible reasons can result in unnecessary/confusing instructions
 // A prime example would be a segregated intersection. Turning around at this
 // intersection would result in two instructions to turn left.
 // Collapsing such turns into a single turn instruction, we give a clearer
 // set of instructions that is not cluttered by unnecessary turns/name changes.
-OSRM_ATTR_WARN_UNUSED
+[[nodiscard]] std::vector<RouteStep>
-std::vector<RouteStep> collapseSegregatedTurnInstructions(std::vector<RouteStep> steps);
+collapseSegregatedTurnInstructions(std::vector<RouteStep> steps);
 
 // A combined turn is a set of two instructions that actually form a single turn, as far as we
 // perceive it. A u-turn consisting of two left turns is one such example. But there are also lots

include/engine/guidance/collapsing_utility.hpp

@@ -3,7 +3,6 @@
 
 #include "guidance/turn_instruction.hpp"
 #include "engine/guidance/route_step.hpp"
-#include "util/attributes.hpp"
 #include "util/bearing.hpp"
 #include "util/guidance/name_announcements.hpp"
 
@@ -122,9 +121,8 @@ inline bool haveSameMode(const RouteStep &first, const RouteStep &second, const
 // alias for readability
 inline bool haveSameName(const RouteStep &lhs, const RouteStep &rhs)
 {
-    const auto has_name_or_ref = [](auto const &step) {
+    const auto has_name_or_ref = [](auto const &step)
-        return !step.name.empty() || !step.ref.empty();
+    { return !step.name.empty() || !step.ref.empty(); };
-    };
 
     // make sure empty is not involved
     if (!has_name_or_ref(lhs) || !has_name_or_ref(rhs))
@@ -151,12 +149,14 @@ inline bool haveSameName(const RouteStep &lhs, const RouteStep &rhs)
 // alias for readability, both turn right | left
 inline bool areSameSide(const RouteStep &lhs, const RouteStep &rhs)
 {
-    const auto is_left = [](const RouteStep &step) {
+    const auto is_left = [](const RouteStep &step)
+    {
         return hasModifier(step, osrm::guidance::DirectionModifier::Straight) ||
                hasLeftModifier(step.maneuver.instruction);
     };
 
-    const auto is_right = [](const RouteStep &step) {
+    const auto is_right = [](const RouteStep &step)
+    {
         return hasModifier(step, osrm::guidance::DirectionModifier::Straight) ||
                hasRightModifier(step.maneuver.instruction);
     };
@@ -165,8 +165,7 @@ inline bool areSameSide(const RouteStep &lhs, const RouteStep &rhs)
 }
 
 // do this after invalidating any steps to compress the step array again
-OSRM_ATTR_WARN_UNUSED
+[[nodiscard]] inline std::vector<RouteStep> removeNoTurnInstructions(std::vector<RouteStep> steps)
-inline std::vector<RouteStep> removeNoTurnInstructions(std::vector<RouteStep> steps)
 {
     // finally clean up the post-processed instructions.
     // Remove all invalid instructions from the set of instructions.
@@ -174,7 +173,8 @@ inline std::vector<RouteStep> removeNoTurnInstructions(std::vector<RouteStep> st
     // Two valid NO_TURNs exist in each leg in the form of Depart/Arrive
 
     // keep valid instructions
-    const auto not_is_valid = [](const RouteStep &step) {
+    const auto not_is_valid = [](const RouteStep &step)
+    {
         return step.maneuver.instruction == osrm::guidance::TurnInstruction::NO_TURN() &&
                step.maneuver.waypoint_type == WaypointType::None;
     };
@@ -225,7 +225,8 @@ inline double totalTurnAngle(const RouteStep &entry_step, const RouteStep &exit_
 inline bool bearingsAreReversed(const double bearing_in, const double bearing_out)
 {
     // Nearly perfectly reversed angles have a difference close to 180 degrees (straight)
-    const double left_turn_angle = [&]() {
+    const double left_turn_angle = [&]()
+    {
         if (0 <= bearing_out && bearing_out <= bearing_in)
             return bearing_in - bearing_out;
         return bearing_in + 360 - bearing_out;

include/engine/guidance/lane_processing.hpp

@@ -1,10 +1,9 @@
 #ifndef OSRM_ENGINE_GUIDANCE_LANE_PROCESSING_HPP_
 #define OSRM_ENGINE_GUIDANCE_LANE_PROCESSING_HPP_
 
-#include <vector>
-
 #include "engine/guidance/route_step.hpp"
-#include "util/attributes.hpp"
+
+#include <vector>
 
 namespace osrm::engine::guidance
 {
@@ -14,9 +13,9 @@ namespace osrm::engine::guidance
 // we anticipate lane changes emitting only matching lanes early on.
 // the second parameter describes the duration that we feel two segments need to be apart to count
 // as separate maneuvers.
-OSRM_ATTR_WARN_UNUSED
+[[nodiscard]] std::vector<RouteStep>
-std::vector<RouteStep> anticipateLaneChange(std::vector<RouteStep> steps,
+anticipateLaneChange(std::vector<RouteStep> steps,
-                                            const double min_distance_needed_for_lane_change = 200);
+                     const double min_distance_needed_for_lane_change = 200);
 
 } // namespace osrm::engine::guidance
 

include/engine/guidance/post_processing.hpp

@@ -5,7 +5,6 @@
 #include "engine/guidance/leg_geometry.hpp"
 #include "engine/guidance/route_step.hpp"
 #include "engine/phantom_node.hpp"
-#include "util/attributes.hpp"
 
 #include <vector>
 
@@ -13,8 +12,7 @@ namespace osrm::engine::guidance
 {
 
 // passed as none-reference to modify in-place and move out again
-OSRM_ATTR_WARN_UNUSED
+[[nodiscard]] std::vector<RouteStep> handleRoundabouts(std::vector<RouteStep> steps);
-std::vector<RouteStep> handleRoundabouts(std::vector<RouteStep> steps);
 
 // trim initial/final segment of very short length.
 // This function uses in/out parameter passing to modify both steps and geometry in place.
@@ -24,23 +22,21 @@ std::vector<RouteStep> handleRoundabouts(std::vector<RouteStep> steps);
 void trimShortSegments(std::vector<RouteStep> &steps, LegGeometry &geometry);
 
 // assign relative locations to depart/arrive instructions
-OSRM_ATTR_WARN_UNUSED
+[[nodiscard]] std::vector<RouteStep> assignRelativeLocations(std::vector<RouteStep> steps,
-std::vector<RouteStep> assignRelativeLocations(std::vector<RouteStep> steps,
+                                                             const LegGeometry &geometry,
-                                               const LegGeometry &geometry,
+                                                             const PhantomNode &source_node,
-                                               const PhantomNode &source_node,
+                                                             const PhantomNode &target_node);
-                                               const PhantomNode &target_node);
 
 // collapse suppressed instructions remaining into intersections array
-OSRM_ATTR_WARN_UNUSED
+[[nodiscard]] std::vector<RouteStep> buildIntersections(std::vector<RouteStep> steps);
-std::vector<RouteStep> buildIntersections(std::vector<RouteStep> steps);
 
 // postProcess will break the connection between the leg geometry
 // for which a segment is supposed to represent exactly the coordinates
 // between routing maneuvers and the route steps itself.
 // If required, we can get both in sync again using this function.
 // Move in LegGeometry for modification in place.
-OSRM_ATTR_WARN_UNUSED
+[[nodiscard]] LegGeometry resyncGeometry(LegGeometry leg_geometry,
-LegGeometry resyncGeometry(LegGeometry leg_geometry, const std::vector<RouteStep> &steps);
+                                         const std::vector<RouteStep> &steps);
 
 /**
  * Apply maneuver override relations to the selected route.

include/engine/guidance/postprocessing_toolkit.hpp

@@ -20,14 +20,16 @@ template <typename Iter, typename Fn> inline Fn forEachRoundabout(Iter first, It
 {
     while (first != last)
     {
-        const auto enter = std::find_if(first, last, [](const RouteStep &step) {
+        const auto enter = std::find_if(first,
-            return entersRoundabout(step.maneuver.instruction);
+                                        last,
-        });
+                                        [](const RouteStep &step)
+                                        { return entersRoundabout(step.maneuver.instruction); });
 
         // enter has to come before leave, otherwise: faulty data / partial roundabout, skip those
-        const auto leave = std::find_if(enter, last, [](const RouteStep &step) {
+        const auto leave = std::find_if(enter,
-            return leavesRoundabout(step.maneuver.instruction);
+                                        last,
-        });
+                                        [](const RouteStep &step)
+                                        { return leavesRoundabout(step.maneuver.instruction); });
 
         // No roundabouts, or partial one (like start / end inside a roundabout)
         if (enter == last || leave == last)

include/engine/guidance/verbosity_reduction.hpp

@@ -2,7 +2,6 @@
 #define OSRM_ENGINE_GUIDANCE_VERBOSITY_REDUCTION_HPP_
 
 #include "engine/guidance/route_step.hpp"
-#include "util/attributes.hpp"
 
 #include <vector>
 
@@ -13,8 +12,7 @@ namespace osrm::engine::guidance
 // to announce them. All these that are not collapsed into a single turn (think segregated
 // intersection) have to be checked for the length they are active in. If they are active for a
 // short distance only, we don't announce them
-OSRM_ATTR_WARN_UNUSED
+[[nodiscard]] std::vector<RouteStep> suppressShortNameSegments(std::vector<RouteStep> steps);
-std::vector<RouteStep> suppressShortNameSegments(std::vector<RouteStep> steps);
 
 } // namespace osrm::engine::guidance
 

include/engine/map_matching/bayes_classifier.hpp

@@ -6,7 +6,7 @@
 #include <utility>
 #include <vector>
 
-#include <boost/math/constants/constants.hpp>
+#include <numbers>
 
 namespace osrm::engine::map_matching
 {
@@ -21,10 +21,8 @@ struct NormalDistribution
     // FIXME implement log-probability version since it's faster
     double Density(const double val) const
     {
-        using namespace boost::math::constants;
-
         const double x = val - mean;
-        return 1.0 / (std::sqrt(two_pi<double>()) * standard_deviation) *
+        return 1.0 / (std::sqrt(2 * std::numbers::pi) * standard_deviation) *
                std::exp(-x * x / (standard_deviation * standard_deviation));
     }
 

include/engine/map_matching/hidden_markov_model.hpp

@@ -4,7 +4,7 @@
 #include "util/integer_range.hpp"
 
 #include <boost/assert.hpp>
-#include <boost/math/constants/constants.hpp>
+#include <numbers>
 
 #include <cmath>
 
@@ -14,7 +14,7 @@
 namespace osrm::engine::map_matching
 {
 
-static const double log_2_pi = std::log(2. * boost::math::constants::pi<double>());
+static const double log_2_pi = std::log(2. * std::numbers::pi);
 static const double IMPOSSIBLE_LOG_PROB = -std::numeric_limits<double>::infinity();
 static const double MINIMAL_LOG_PROB = std::numeric_limits<double>::lowest();
 static const std::size_t INVALID_STATE = std::numeric_limits<std::size_t>::max();

include/engine/map_matching/matching_confidence.hpp

@@ -2,7 +2,7 @@
 #define ENGINE_MAP_MATCHING_CONFIDENCE_HPP
 
 #include "engine/map_matching/bayes_classifier.hpp"
-
+#include <boost/assert.hpp>
 #include <cmath>
 
 namespace osrm::engine::map_matching

include/engine/phantom_node.hpp

@@ -259,10 +259,10 @@ inline util::Coordinate candidatesInputLocation(const PhantomNodeCandidates &can
 
 inline bool candidatesHaveComponent(const PhantomNodeCandidates &candidates, uint32_t component_id)
 {
-    return std::any_of(
+    return std::any_of(candidates.begin(),
-        candidates.begin(), candidates.end(), [component_id](const PhantomNode &node) {
+                       candidates.end(),
-            return node.component.id == component_id;
+                       [component_id](const PhantomNode &node)
-        });
+                       { return node.component.id == component_id; });
 }
 
 struct PhantomEndpoints

include/engine/plugins/plugin_base.hpp

@@ -33,10 +33,10 @@ class BasePlugin
 
     bool CheckAllCoordinates(const std::vector<util::Coordinate> &coordinates) const
     {
-        return !std::any_of(
+        return !std::any_of(std::begin(coordinates),
-            std::begin(coordinates), std::end(coordinates), [](const util::Coordinate coordinate) {
+                            std::end(coordinates),
-                return !coordinate.IsValid();
+                            [](const util::Coordinate coordinate)
-            });
+                            { return !coordinate.IsValid(); });
     }
 
     bool CheckAlgorithms(const api::BaseParameters &params,
@@ -95,7 +95,7 @@ class BasePlugin
                  const std::string &message,
                  osrm::engine::api::ResultT &result) const
     {
-        mapbox::util::apply_visitor(ErrorRenderer(code, message), result);
+        std::visit(ErrorRenderer(code, message), result);
         return Status::Error;
     }
 
@@ -105,45 +105,45 @@ class BasePlugin
     {
         // are all phantoms from a tiny cc?
         const auto all_in_same_tiny_component =
-            [](const std::vector<PhantomCandidateAlternatives> &alts_list) {
+            [](const std::vector<PhantomCandidateAlternatives> &alts_list)
-                return std::any_of(
+        {
-                    alts_list.front().first.begin(),
+            return std::any_of(
-                    alts_list.front().first.end(),
+                alts_list.front().first.begin(),
-                    // For each of the first possible phantoms, check if all other
+                alts_list.front().first.end(),
-                    // positions in the list have a phantom from the same small component.
+                // For each of the first possible phantoms, check if all other
-                    [&](const PhantomNode &phantom) {
+                // positions in the list have a phantom from the same small component.
-                        if (!phantom.component.is_tiny)
+                [&](const PhantomNode &phantom)
-                        {
+                {
-                            return false;
+                    if (!phantom.component.is_tiny)
-                        }
+                    {
-                        const auto component_id = phantom.component.id;
+                        return false;
-                        return std::all_of(
+                    }
-                            std::next(alts_list.begin()),
+                    const auto component_id = phantom.component.id;
-                            std::end(alts_list),
+                    return std::all_of(
-                            [component_id](const PhantomCandidateAlternatives &alternatives) {
+                        std::next(alts_list.begin()),
-                                return candidatesHaveComponent(alternatives.first, component_id);
+                        std::end(alts_list),
-                            });
+                        [component_id](const PhantomCandidateAlternatives &alternatives)
-                    });
+                        { return candidatesHaveComponent(alternatives.first, component_id); });
-            };
+                });
+        };
 
         // Move the alternative into the final list
-        const auto fallback_to_big_component = [](PhantomCandidateAlternatives &alternatives) {
+        const auto fallback_to_big_component = [](PhantomCandidateAlternatives &alternatives)
+        {
             auto no_big_alternative = alternatives.second.empty();
             return no_big_alternative ? std::move(alternatives.first)
                                       : std::move(alternatives.second);
         };
 
         // Move the alternative into the final list
-        const auto use_closed_phantom = [](PhantomCandidateAlternatives &alternatives) {
+        const auto use_closed_phantom = [](PhantomCandidateAlternatives &alternatives)
-            return std::move(alternatives.first);
+        { return std::move(alternatives.first); };
-        };
 
         const auto no_alternatives =
             std::all_of(alternatives_list.begin(),
                         alternatives_list.end(),
-                        [](const PhantomCandidateAlternatives &alternatives) {
+                        [](const PhantomCandidateAlternatives &alternatives)
-                            return alternatives.second.empty();
+                        { return alternatives.second.empty(); });
-                        });
 
         std::vector<PhantomNodeCandidates> snapped_phantoms;
         snapped_phantoms.reserve(alternatives_list.size());
@@ -313,12 +313,12 @@ class BasePlugin
                           alternatives.end(),
                           coordinates.begin(),
                           coordinates.end(),
-                          [](const auto &candidates_pair, const auto &coordinate) {
+                          [](const auto &candidates_pair, const auto &coordinate)
+                          {
                               return std::any_of(candidates_pair.first.begin(),
                                                  candidates_pair.first.end(),
-                                                 [&](const auto &phantom) {
+                                                 [&](const auto &phantom)
-                                                     return phantom.input_location == coordinate;
+                                                 { return phantom.input_location == coordinate; });
-                                                 });
                           });
         std::size_t missing_index = std::distance(alternatives.begin(), mismatch.first);
         return std::string("Could not find a matching segment for coordinate ") +

include/engine/polyline_compressor.hpp

@@ -39,7 +39,8 @@ std::string encodePolyline(CoordVectorForwardIter begin, CoordVectorForwardIter
         begin,
         end,
         [&delta_numbers, &current_lat, &current_lon, coordinate_to_polyline](
-            const util::Coordinate loc) {
+            const util::Coordinate loc)
+        {
             const int lat_diff =
                 std::round(static_cast<int>(loc.lat) * coordinate_to_polyline) - current_lat;
             const int lon_diff =

include/engine/routing_algorithms/routing_base.hpp

@@ -71,24 +71,27 @@ void insertTargetInReverseHeap(Heap &reverse_heap, const PhantomNode &target)
 static constexpr bool FORWARD_DIRECTION = true;
 static constexpr bool REVERSE_DIRECTION = false;
 
-// Identify nodes in the forward(reverse) search direction that will require loop forcing
+// Identify nodes in the forward(reverse) search direction that will require step forcing
 // e.g. if source and destination nodes are on the same segment.
-std::vector<NodeID> getForwardLoopNodes(const PhantomEndpointCandidates &candidates);
+std::vector<NodeID> getForwardForceNodes(const PhantomEndpointCandidates &candidates);
-std::vector<NodeID> getForwardLoopNodes(const PhantomCandidatesToTarget &candidates);
+std::vector<NodeID> getForwardForceNodes(const PhantomCandidatesToTarget &candidates);
-std::vector<NodeID> getBackwardLoopNodes(const PhantomEndpointCandidates &candidates);
+std::vector<NodeID> getBackwardForceNodes(const PhantomEndpointCandidates &candidates);
-std::vector<NodeID> getBackwardLoopNodes(const PhantomCandidatesToTarget &candidates);
+std::vector<NodeID> getBackwardForceNodes(const PhantomCandidatesToTarget &candidates);
 
 // Find the specific phantom node endpoints for a given path from a list of candidates.
 PhantomEndpoints endpointsFromCandidates(const PhantomEndpointCandidates &candidates,
                                          const std::vector<NodeID> &path);
 
 template <typename HeapNodeT>
-inline bool force_loop(const std::vector<NodeID> &force_nodes, const HeapNodeT &heap_node)
+inline bool shouldForceStep(const std::vector<NodeID> &force_nodes,
+                            const HeapNodeT &forward_heap_node,
+                            const HeapNodeT &reverse_heap_node)
 {
-    // if loops are forced, they are so at the source
+    // routing steps are forced when the node is a source of both forward and reverse search heaps.
-    return !force_nodes.empty() &&
+    return forward_heap_node.data.parent == forward_heap_node.node &&
-           std::find(force_nodes.begin(), force_nodes.end(), heap_node.node) != force_nodes.end() &&
+           reverse_heap_node.data.parent == reverse_heap_node.node &&
-           heap_node.data.parent == heap_node.node;
+           std::find(force_nodes.begin(), force_nodes.end(), forward_heap_node.node) !=
+               force_nodes.end();
 }
 
 template <typename Heap>
@@ -190,8 +193,10 @@ void annotatePath(const FacadeT &facade,
     std::vector<SegmentDuration> duration_vector;
     std::vector<DatasourceID> datasource_vector;
 
-    const auto get_segment_geometry = [&](const auto geometry_index) {
+    const auto get_segment_geometry = [&](const auto geometry_index)
-        const auto copy = [](auto &vector, const auto range) {
+    {
+        const auto copy = [](auto &vector, const auto range)
+        {
             vector.resize(range.size());
             std::copy(range.begin(), range.end(), vector.begin());
         };

include/engine/routing_algorithms/routing_base_ch.hpp

@@ -112,8 +112,7 @@ void routingStep(const DataFacade<Algorithm> &facade,
                  NodeID &middle_node_id,
                  EdgeWeight &upper_bound,
                  EdgeWeight min_edge_offset,
-                 const std::vector<NodeID> &force_loop_forward_nodes,
+                 const std::vector<NodeID> &force_step_nodes)
-                 const std::vector<NodeID> &force_loop_reverse_nodes)
 {
     auto heapNode = forward_heap.DeleteMinGetHeapNode();
     const auto reverseHeapNode = reverse_heap.GetHeapNodeIfWasInserted(heapNode.node);
@@ -123,13 +122,13 @@ void routingStep(const DataFacade<Algorithm> &facade,
         const EdgeWeight new_weight = reverseHeapNode->weight + heapNode.weight;
         if (new_weight < upper_bound)
         {
-            if (force_loop(force_loop_forward_nodes, heapNode) ||
+            if (shouldForceStep(force_step_nodes, heapNode, *reverseHeapNode) ||
-                force_loop(force_loop_reverse_nodes, heapNode) ||
                 // in this case we are looking at a bi-directional way where the source
                 // and target phantom are on the same edge based node
                 new_weight < EdgeWeight{0})
             {
-                // check whether there is a loop present at the node
+                // Before forcing step, check whether there is a loop present at the node.
+                // We may find a valid weight path by following the loop.
                 for (const auto edge : facade.GetAdjacentEdgeRange(heapNode.node))
                 {
                     const auto &data = facade.GetEdgeData(edge);
@@ -294,9 +293,9 @@ EdgeDistance calculateEBGNodeAnnotations(const DataFacade<Algorithm> &facade,
 
             // Look for an edge on the forward CH graph (.forward)
             EdgeID smaller_edge_id =
-                facade.FindSmallestEdge(std::get<0>(edge), std::get<1>(edge), [](const auto &data) {
+                facade.FindSmallestEdge(std::get<0>(edge),
-                    return data.forward;
+                                        std::get<1>(edge),
-                });
+                                        [](const auto &data) { return data.forward; });
 
             // If we didn't find one there, the we might be looking at a part of the path that
             // was found using the backward search.  Here, we flip the node order (.second,
@@ -381,7 +380,8 @@ void unpackPath(const FacadeT &facade,
         unpackPath(facade,
                    packed_path_begin,
                    packed_path_end,
-                   [&](std::pair<NodeID, NodeID> &edge, const auto &edge_id) {
+                   [&](std::pair<NodeID, NodeID> &edge, const auto &edge_id)
+                   {
                        BOOST_ASSERT(edge.first == unpacked_nodes.back());
                        unpacked_nodes.push_back(edge.second);
                        unpacked_edges.push_back(edge_id);
@@ -420,23 +420,22 @@ void retrievePackedPathFromSingleManyToManyHeap(
 // assumes that heaps are already setup correctly.
 // ATTENTION: This only works if no additional offset is supplied next to the Phantom Node
 // Offsets.
-// In case additional offsets are supplied, you might have to force a loop first.
+// In case additional offsets are supplied, you might have to force a routing step first.
-// A forced loop might be necessary, if source and target are on the same segment.
+// A forced step might be necessary, if source and target are on the same segment.
 // If this is the case and the offsets of the respective direction are larger for the source
 // than the target
-// then a force loop is required (e.g. source_phantom.forward_segment_id ==
+// then a force step is required (e.g. source_phantom.forward_segment_id ==
 // target_phantom.forward_segment_id
 // && source_phantom.GetForwardWeightPlusOffset() > target_phantom.GetForwardWeightPlusOffset())
 // requires
-// a force loop, if the heaps have been initialized with positive offsets.
+// a force step, if the heaps have been initialized with positive offsets.
 void search(SearchEngineData<Algorithm> &engine_working_data,
             const DataFacade<Algorithm> &facade,
             SearchEngineData<Algorithm>::QueryHeap &forward_heap,
             SearchEngineData<Algorithm>::QueryHeap &reverse_heap,
             EdgeWeight &weight,
             std::vector<NodeID> &packed_leg,
-            const std::vector<NodeID> &force_loop_forward_node,
+            const std::vector<NodeID> &force_step_nodes,
-            const std::vector<NodeID> &force_loop_reverse_node,
             const EdgeWeight duration_upper_bound = INVALID_EDGE_WEIGHT);
 
 template <typename PhantomEndpointT>
@@ -446,8 +445,7 @@ void search(SearchEngineData<Algorithm> &engine_working_data,
             SearchEngineData<Algorithm>::QueryHeap &reverse_heap,
             EdgeWeight &weight,
             std::vector<NodeID> &packed_leg,
-            const std::vector<NodeID> &force_loop_forward_node,
+            const std::vector<NodeID> &force_step_nodes,
-            const std::vector<NodeID> &force_loop_reverse_node,
             const PhantomEndpointT & /*endpoints*/,
             const EdgeWeight duration_upper_bound = INVALID_EDGE_WEIGHT)
 {
@@ -458,14 +456,13 @@ void search(SearchEngineData<Algorithm> &engine_working_data,
                   reverse_heap,
                   weight,
                   packed_leg,
-                  force_loop_forward_node,
+                  force_step_nodes,
-                  force_loop_reverse_node,
                   duration_upper_bound);
 }
 
 // Requires the heaps for be empty
 // If heaps should be adjusted to be initialized outside of this function,
-// the addition of force_loop parameters might be required
+// the addition of force_step parameters might be required
 double getNetworkDistance(SearchEngineData<Algorithm> &engine_working_data,
                           const DataFacade<ch::Algorithm> &facade,
                           SearchEngineData<Algorithm>::QueryHeap &forward_heap,

include/engine/routing_algorithms/routing_base_mld.hpp

@@ -11,6 +11,7 @@
 #include <boost/assert.hpp>
 
 #include <algorithm>
+#include <boost/core/ignore_unused.hpp>
 #include <iterator>
 #include <limits>
 #include <tuple>
@@ -30,7 +31,8 @@ inline LevelID getNodeQueryLevel(const MultiLevelPartition &partition,
                                  const PhantomNode &source,
                                  const PhantomNode &target)
 {
-    auto level = [&partition, node](const SegmentID &source, const SegmentID &target) {
+    auto level = [&partition, node](const SegmentID &source, const SegmentID &target)
+    {
         if (source.enabled && target.enabled)
             return partition.GetQueryLevel(source.id, target.id, node);
         return INVALID_LEVEL_ID;
@@ -59,7 +61,8 @@ inline LevelID getNodeQueryLevel(const MultiLevelPartition &partition,
         endpoint_candidates.source_phantoms.begin(),
         endpoint_candidates.source_phantoms.end(),
         INVALID_LEVEL_ID,
-        [&](LevelID current_level, const PhantomNode &source) {
+        [&](LevelID current_level, const PhantomNode &source)
+        {
             return std::min(
                 current_level,
                 getNodeQueryLevel(partition, node, source, endpoint_candidates.target_phantom));
@@ -76,7 +79,8 @@ inline LevelID getNodeQueryLevel(const MultiLevelPartition &partition,
         endpoint_candidates.source_phantoms.begin(),
         endpoint_candidates.source_phantoms.end(),
         INVALID_LEVEL_ID,
-        [&](LevelID level_1, const PhantomNode &source) {
+        [&](LevelID level_1, const PhantomNode &source)
+        {
             return std::min(
                 level_1,
                 std::accumulate(endpoint_candidates.target_phantoms.begin(),
@@ -119,7 +123,8 @@ inline LevelID getNodeQueryLevel(const MultiLevelPartition &partition,
                                  const NodeID node,
                                  const PhantomNodeCandidates &candidates)
 {
-    auto highest_different_level = [&partition, node](const SegmentID &segment) {
+    auto highest_different_level = [&partition, node](const SegmentID &segment)
+    {
         return segment.enabled ? partition.GetHighestDifferentLevel(segment.id, node)
                                : INVALID_LEVEL_ID;
     };
@@ -128,7 +133,8 @@ inline LevelID getNodeQueryLevel(const MultiLevelPartition &partition,
         std::accumulate(candidates.begin(),
                         candidates.end(),
                         INVALID_LEVEL_ID,
-                        [&](LevelID current_level, const PhantomNode &phantom_node) {
+                        [&](LevelID current_level, const PhantomNode &phantom_node)
+                        {
                             auto highest_level =
                                 std::min(highest_different_level(phantom_node.forward_segment_id),
                                          highest_different_level(phantom_node.reverse_segment_id));
@@ -151,9 +157,11 @@ inline LevelID getNodeQueryLevel(const MultiLevelPartition &partition,
     // This is equivalent to min_{∀ source, target} partition.GetQueryLevel(source, node, target)
     auto init = getNodeQueryLevel(partition, node, candidates_list[phantom_index]);
     auto result = std::accumulate(
-        phantom_indices.begin(), phantom_indices.end(), init, [&](LevelID level, size_t index) {
+        phantom_indices.begin(),
-            return std::min(level, getNodeQueryLevel(partition, node, candidates_list[index]));
+        phantom_indices.end(),
-        });
+        init,
+        [&](LevelID level, size_t index)
+        { return std::min(level, getNodeQueryLevel(partition, node, candidates_list[index])); });
     return result;
 }
 } // namespace
@@ -262,11 +270,30 @@ retrievePackedPathFromHeap(const SearchEngineData<Algorithm>::QueryHeap &forward
     return packed_path;
 }
 
-template <bool DIRECTION, typename Algorithm, typename... Args>
+template <typename Heap>
+void insertOrUpdate(Heap &heap,
+                    const NodeID node,
+                    const EdgeWeight weight,
+                    const typename Heap::DataType &data)
+{
+    const auto heapNode = heap.GetHeapNodeIfWasInserted(node);
+    if (!heapNode)
+    {
+        heap.Insert(node, weight, data);
+    }
+    else if (weight < heapNode->weight)
+    {
+        heapNode->data = data;
+        heapNode->weight = weight;
+        heap.DecreaseKey(*heapNode);
+    }
+}
+
+template <bool DIRECTION, typename Algorithm, typename Heap, typename... Args>
 void relaxOutgoingEdges(const DataFacade<Algorithm> &facade,
-                        typename SearchEngineData<Algorithm>::QueryHeap &forward_heap,
+                        Heap &forward_heap,
-                        const typename SearchEngineData<Algorithm>::QueryHeap::HeapNode &heapNode,
+                        const typename Heap::HeapNode &heapNode,
-                        const Args &... args)
+                        const Args &...args)
 {
     const auto &partition = facade.GetMultiLevelPartition();
     const auto &cells = facade.GetCellStorage();
@@ -274,14 +301,31 @@ void relaxOutgoingEdges(const DataFacade<Algorithm> &facade,
 
     const auto level = getNodeQueryLevel(partition, heapNode.node, args...);
 
+    static constexpr auto IS_MAP_MATCHING =
+        std::is_same_v<typename SearchEngineData<mld::Algorithm>::MapMatchingQueryHeap, Heap>;
+
     if (level >= 1 && !heapNode.data.from_clique_arc)
     {
-        if (DIRECTION == FORWARD_DIRECTION)
+        if constexpr (DIRECTION == FORWARD_DIRECTION)
         {
             // Shortcuts in forward direction
             const auto &cell =
                 cells.GetCell(metric, level, partition.GetCell(level, heapNode.node));
             auto destination = cell.GetDestinationNodes().begin();
+            auto distance = [&cell, node = heapNode.node ]() -> auto
+            {
+                if constexpr (IS_MAP_MATCHING)
+                {
+
+                    return cell.GetOutDistance(node).begin();
+                }
+                else
+                {
+                    boost::ignore_unused(cell, node);
+                    return 0;
+                }
+            }
+            ();
             for (auto shortcut_weight : cell.GetOutWeight(heapNode.node))
             {
                 BOOST_ASSERT(destination != cell.GetDestinationNodes().end());
@@ -291,19 +335,23 @@ void relaxOutgoingEdges(const DataFacade<Algorithm> &facade,
                 {
                     const EdgeWeight to_weight = heapNode.weight + shortcut_weight;
                     BOOST_ASSERT(to_weight >= heapNode.weight);
-                    const auto toHeapNode = forward_heap.GetHeapNodeIfWasInserted(to);
+
-                    if (!toHeapNode)
+                    if constexpr (IS_MAP_MATCHING)
                     {
-                        forward_heap.Insert(to, to_weight, {heapNode.node, true});
+                        const EdgeDistance to_distance = heapNode.data.distance + *distance;
+                        insertOrUpdate(
+                            forward_heap, to, to_weight, {heapNode.node, true, to_distance});
                     }
-                    else if (to_weight < toHeapNode->weight)
+                    else
                     {
-                        toHeapNode->data = {heapNode.node, true};
+                        insertOrUpdate(forward_heap, to, to_weight, {heapNode.node, true});
-                        toHeapNode->weight = to_weight;
-                        forward_heap.DecreaseKey(*toHeapNode);
                     }
                 }
                 ++destination;
+                if constexpr (IS_MAP_MATCHING)
+                {
+                    ++distance;
+                }
             }
         }
         else
@@ -312,6 +360,20 @@ void relaxOutgoingEdges(const DataFacade<Algorithm> &facade,
             const auto &cell =
                 cells.GetCell(metric, level, partition.GetCell(level, heapNode.node));
             auto source = cell.GetSourceNodes().begin();
+            auto distance = [&cell, node = heapNode.node ]() -> auto
+            {
+                if constexpr (IS_MAP_MATCHING)
+                {
+
+                    return cell.GetInDistance(node).begin();
+                }
+                else
+                {
+                    boost::ignore_unused(cell, node);
+                    return 0;
+                }
+            }
+            ();
             for (auto shortcut_weight : cell.GetInWeight(heapNode.node))
             {
                 BOOST_ASSERT(source != cell.GetSourceNodes().end());
@@ -321,19 +383,22 @@ void relaxOutgoingEdges(const DataFacade<Algorithm> &facade,
                 {
                     const EdgeWeight to_weight = heapNode.weight + shortcut_weight;
                     BOOST_ASSERT(to_weight >= heapNode.weight);
-                    const auto toHeapNode = forward_heap.GetHeapNodeIfWasInserted(to);
+                    if constexpr (IS_MAP_MATCHING)
-                    if (!toHeapNode)
                     {
-                        forward_heap.Insert(to, to_weight, {heapNode.node, true});
+                        const EdgeDistance to_distance = heapNode.data.distance + *distance;
+                        insertOrUpdate(
+                            forward_heap, to, to_weight, {heapNode.node, true, to_distance});
                     }
-                    else if (to_weight < toHeapNode->weight)
+                    else
                     {
-                        toHeapNode->data = {heapNode.node, true};
+                        insertOrUpdate(forward_heap, to, to_weight, {heapNode.node, true});
-                        toHeapNode->weight = to_weight;
-                        forward_heap.DecreaseKey(*toHeapNode);
                     }
                 }
                 ++source;
+                if constexpr (IS_MAP_MATCHING)
+                {
+                    ++distance;
+                }
             }
         }
     }
@@ -360,31 +425,32 @@ void relaxOutgoingEdges(const DataFacade<Algorithm> &facade,
                 const EdgeWeight to_weight =
                     heapNode.weight + node_weight + alias_cast<EdgeWeight>(turn_penalty);
 
-                const auto toHeapNode = forward_heap.GetHeapNodeIfWasInserted(to);
+                if constexpr (IS_MAP_MATCHING)
-                if (!toHeapNode)
                 {
-                    forward_heap.Insert(to, to_weight, {heapNode.node, false});
+                    const auto node_distance =
+                        facade.GetNodeDistance(DIRECTION == FORWARD_DIRECTION ? heapNode.node : to);
+
+                    const EdgeDistance to_distance = heapNode.data.distance + node_distance;
+                    insertOrUpdate(
+                        forward_heap, to, to_weight, {heapNode.node, false, to_distance});
                 }
-                else if (to_weight < toHeapNode->weight)
+                else
                 {
-                    toHeapNode->data = {heapNode.node, false};
+                    insertOrUpdate(forward_heap, to, to_weight, {heapNode.node, false});
-                    toHeapNode->weight = to_weight;
-                    forward_heap.DecreaseKey(*toHeapNode);
                 }
             }
         }
     }
 }
 
-template <bool DIRECTION, typename Algorithm, typename... Args>
+template <bool DIRECTION, typename Algorithm, typename Heap, typename... Args>
 void routingStep(const DataFacade<Algorithm> &facade,
-                 typename SearchEngineData<Algorithm>::QueryHeap &forward_heap,
+                 Heap &forward_heap,
-                 typename SearchEngineData<Algorithm>::QueryHeap &reverse_heap,
+                 Heap &reverse_heap,
                  NodeID &middle_node,
                  EdgeWeight &path_upper_bound,
-                 const std::vector<NodeID> &force_loop_forward_nodes,
+                 const std::vector<NodeID> &force_step_nodes,
-                 const std::vector<NodeID> &force_loop_reverse_nodes,
+                 const Args &...args)
-                 const Args &... args)
 {
     const auto heapNode = forward_heap.DeleteMinGetHeapNode();
     const auto weight = heapNode.weight;
@@ -402,11 +468,8 @@ void routingStep(const DataFacade<Algorithm> &facade,
         auto reverse_weight = reverseHeapNode->weight;
         auto path_weight = weight + reverse_weight;
 
-        // MLD uses loops forcing only to prune single node paths in forward and/or
+        if (!shouldForceStep(force_step_nodes, heapNode, *reverseHeapNode) &&
-        // backward direction (there is no need to force loops in MLD but in CH)
+            (path_weight >= EdgeWeight{0}) && (path_weight < path_upper_bound))
-        if (!force_loop(force_loop_forward_nodes, heapNode) &&
-            !force_loop(force_loop_reverse_nodes, heapNode) && (path_weight >= EdgeWeight{0}) &&
-            (path_weight < path_upper_bound))
         {
             middle_node = heapNode.node;
             path_upper_bound = path_weight;
@@ -426,23 +489,19 @@ using UnpackedNodes = std::vector<NodeID>;
 using UnpackedEdges = std::vector<EdgeID>;
 using UnpackedPath = std::tuple<EdgeWeight, UnpackedNodes, UnpackedEdges>;
 
-template <typename Algorithm, typename... Args>
+template <typename Algorithm, typename Heap, typename... Args>
-UnpackedPath search(SearchEngineData<Algorithm> &engine_working_data,
+std::optional<std::pair<NodeID, EdgeWeight>> runSearch(const DataFacade<Algorithm> &facade,
-                    const DataFacade<Algorithm> &facade,
+                                                       Heap &forward_heap,
-                    typename SearchEngineData<Algorithm>::QueryHeap &forward_heap,
+                                                       Heap &reverse_heap,
-                    typename SearchEngineData<Algorithm>::QueryHeap &reverse_heap,
+                                                       const std::vector<NodeID> &force_step_nodes,
-                    const std::vector<NodeID> &force_loop_forward_nodes,
+                                                       EdgeWeight weight_upper_bound,
-                    const std::vector<NodeID> &force_loop_reverse_nodes,
+                                                       const Args &...args)
-                    EdgeWeight weight_upper_bound,
-                    const Args &... args)
 {
     if (forward_heap.Empty() || reverse_heap.Empty())
     {
-        return std::make_tuple(INVALID_EDGE_WEIGHT, std::vector<NodeID>(), std::vector<EdgeID>());
+        return {};
     }
 
-    const auto &partition = facade.GetMultiLevelPartition();
-
     BOOST_ASSERT(!forward_heap.Empty() && forward_heap.MinKey() < INVALID_EDGE_WEIGHT);
     BOOST_ASSERT(!reverse_heap.Empty() && reverse_heap.MinKey() < INVALID_EDGE_WEIGHT);
 
@@ -456,27 +515,15 @@ UnpackedPath search(SearchEngineData<Algorithm> &engine_working_data,
     {
         if (!forward_heap.Empty())
         {
-            routingStep<FORWARD_DIRECTION>(facade,
+            routingStep<FORWARD_DIRECTION>(
-                                           forward_heap,
+                facade, forward_heap, reverse_heap, middle, weight, force_step_nodes, args...);
-                                           reverse_heap,
-                                           middle,
-                                           weight,
-                                           force_loop_forward_nodes,
-                                           force_loop_reverse_nodes,
-                                           args...);
             if (!forward_heap.Empty())
                 forward_heap_min = forward_heap.MinKey();
         }
         if (!reverse_heap.Empty())
         {
-            routingStep<REVERSE_DIRECTION>(facade,
+            routingStep<REVERSE_DIRECTION>(
-                                           reverse_heap,
+                facade, reverse_heap, forward_heap, middle, weight, force_step_nodes, args...);
-                                           forward_heap,
-                                           middle,
-                                           weight,
-                                           force_loop_reverse_nodes,
-                                           force_loop_forward_nodes,
-                                           args...);
             if (!reverse_heap.Empty())
                 reverse_heap_min = reverse_heap.MinKey();
         }
@@ -484,10 +531,33 @@ UnpackedPath search(SearchEngineData<Algorithm> &engine_working_data,
 
     // No path found for both target nodes?
     if (weight >= weight_upper_bound || SPECIAL_NODEID == middle)
+    {
+        return {};
+    }
+
+    return {{middle, weight}};
+}
+
+template <typename Algorithm, typename... Args>
+UnpackedPath search(SearchEngineData<Algorithm> &engine_working_data,
+                    const DataFacade<Algorithm> &facade,
+                    typename SearchEngineData<Algorithm>::QueryHeap &forward_heap,
+                    typename SearchEngineData<Algorithm>::QueryHeap &reverse_heap,
+                    const std::vector<NodeID> &force_step_nodes,
+                    EdgeWeight weight_upper_bound,
+                    const Args &...args)
+{
+    auto searchResult = runSearch(
+        facade, forward_heap, reverse_heap, force_step_nodes, weight_upper_bound, args...);
+    if (!searchResult)
     {
         return std::make_tuple(INVALID_EDGE_WEIGHT, std::vector<NodeID>(), std::vector<EdgeID>());
     }
 
+    auto [middle, weight] = *searchResult;
+
+    const auto &partition = facade.GetMultiLevelPartition();
+
     // Get packed path as edges {from node ID, to node ID, from_clique_arc}
     auto packed_path = retrievePackedPathFromHeap(forward_heap, reverse_heap, middle);
 
@@ -505,9 +575,7 @@ UnpackedPath search(SearchEngineData<Algorithm> &engine_working_data,
 
     for (auto const &packed_edge : packed_path)
     {
-        NodeID source, target;
+        auto [source, target, overlay_edge] = packed_edge;
-        bool overlay_edge;
-        std::tie(source, target, overlay_edge) = packed_edge;
         if (!overlay_edge)
         { // a base graph edge
             unpacked_nodes.push_back(target);
@@ -527,21 +595,14 @@ UnpackedPath search(SearchEngineData<Algorithm> &engine_working_data,
             forward_heap.Insert(source, {0}, {source});
             reverse_heap.Insert(target, {0}, {target});
 
-            // TODO: when structured bindings will be allowed change to
+            auto [subpath_weight, subpath_nodes, subpath_edges] = search(engine_working_data,
-            // auto [subpath_weight, subpath_source, subpath_target, subpath] = ...
+                                                                         facade,
-            EdgeWeight subpath_weight;
+                                                                         forward_heap,
-            std::vector<NodeID> subpath_nodes;
+                                                                         reverse_heap,
-            std::vector<EdgeID> subpath_edges;
+                                                                         force_step_nodes,
-            std::tie(subpath_weight, subpath_nodes, subpath_edges) =
+                                                                         INVALID_EDGE_WEIGHT,
-                search(engine_working_data,
+                                                                         sublevel,
-                       facade,
+                                                                         parent_cell_id);
-                       forward_heap,
-                       reverse_heap,
-                       force_loop_forward_nodes,
-                       force_loop_reverse_nodes,
-                       INVALID_EDGE_WEIGHT,
-                       sublevel,
-                       parent_cell_id);
             BOOST_ASSERT(!subpath_edges.empty());
             BOOST_ASSERT(subpath_nodes.size() > 1);
             BOOST_ASSERT(subpath_nodes.front() == source);
@@ -555,6 +616,31 @@ UnpackedPath search(SearchEngineData<Algorithm> &engine_working_data,
     return std::make_tuple(weight, std::move(unpacked_nodes), std::move(unpacked_edges));
 }
 
+template <typename Algorithm, typename... Args>
+EdgeDistance
+searchDistance(SearchEngineData<Algorithm> &,
+               const DataFacade<Algorithm> &facade,
+               typename SearchEngineData<Algorithm>::MapMatchingQueryHeap &forward_heap,
+               typename SearchEngineData<Algorithm>::MapMatchingQueryHeap &reverse_heap,
+               const std::vector<NodeID> &force_step_nodes,
+               EdgeWeight weight_upper_bound,
+               const Args &...args)
+{
+
+    auto searchResult = runSearch(
+        facade, forward_heap, reverse_heap, force_step_nodes, weight_upper_bound, args...);
+    if (!searchResult)
+    {
+        return INVALID_EDGE_DISTANCE;
+    }
+
+    auto [middle, _] = *searchResult;
+
+    auto distance = forward_heap.GetData(middle).distance + reverse_heap.GetData(middle).distance;
+
+    return distance;
+}
+
 // Alias to be compatible with the CH-based search
 template <typename Algorithm, typename PhantomEndpointT>
 inline void search(SearchEngineData<Algorithm> &engine_working_data,
@@ -563,8 +649,7 @@ inline void search(SearchEngineData<Algorithm> &engine_working_data,
                    typename SearchEngineData<Algorithm>::QueryHeap &reverse_heap,
                    EdgeWeight &weight,
                    std::vector<NodeID> &unpacked_nodes,
-                   const std::vector<NodeID> &force_loop_forward_node,
+                   const std::vector<NodeID> &force_step_nodes,
-                   const std::vector<NodeID> &force_loop_reverse_node,
                    const PhantomEndpointT &endpoints,
                    const EdgeWeight weight_upper_bound = INVALID_EDGE_WEIGHT)
 {
@@ -573,8 +658,7 @@ inline void search(SearchEngineData<Algorithm> &engine_working_data,
                                                            facade,
                                                            forward_heap,
                                                            reverse_heap,
-                                                           force_loop_forward_node,
+                                                           force_step_nodes,
-                                                           force_loop_reverse_node,
                                                            weight_upper_bound,
                                                            endpoints);
 }
@@ -601,7 +685,8 @@ void unpackPath(const FacadeT &facade,
         util::for_each_pair(
             packed_path_begin,
             packed_path_end,
-            [&facade, &unpacked_nodes, &unpacked_edges](const auto from, const auto to) {
+            [&facade, &unpacked_nodes, &unpacked_edges](const auto from, const auto to)
+            {
                 unpacked_nodes.push_back(to);
                 unpacked_edges.push_back(facade.FindEdge(from, to));
             });
@@ -613,8 +698,8 @@ void unpackPath(const FacadeT &facade,
 template <typename Algorithm>
 double getNetworkDistance(SearchEngineData<Algorithm> &engine_working_data,
                           const DataFacade<Algorithm> &facade,
-                          typename SearchEngineData<Algorithm>::QueryHeap &forward_heap,
+                          typename SearchEngineData<Algorithm>::MapMatchingQueryHeap &forward_heap,
-                          typename SearchEngineData<Algorithm>::QueryHeap &reverse_heap,
+                          typename SearchEngineData<Algorithm>::MapMatchingQueryHeap &reverse_heap,
                           const PhantomNode &source_phantom,
                           const PhantomNode &target_phantom,
                           EdgeWeight weight_upper_bound = INVALID_EDGE_WEIGHT)
@@ -622,31 +707,50 @@ double getNetworkDistance(SearchEngineData<Algorithm> &engine_working_data,
     forward_heap.Clear();
     reverse_heap.Clear();
 
+    if (source_phantom.IsValidForwardSource())
+    {
+        forward_heap.Insert(source_phantom.forward_segment_id.id,
+                            EdgeWeight{0} - source_phantom.GetForwardWeightPlusOffset(),
+                            {source_phantom.forward_segment_id.id,
+                             false,
+                             EdgeDistance{0} - source_phantom.GetForwardDistance()});
+    }
+
+    if (source_phantom.IsValidReverseSource())
+    {
+        forward_heap.Insert(source_phantom.reverse_segment_id.id,
+                            EdgeWeight{0} - source_phantom.GetReverseWeightPlusOffset(),
+                            {source_phantom.reverse_segment_id.id,
+                             false,
+                             EdgeDistance{0} - source_phantom.GetReverseDistance()});
+    }
+
+    if (target_phantom.IsValidForwardTarget())
+    {
+        reverse_heap.Insert(
+            target_phantom.forward_segment_id.id,
+            target_phantom.GetForwardWeightPlusOffset(),
+            {target_phantom.forward_segment_id.id, false, target_phantom.GetForwardDistance()});
+    }
+
+    if (target_phantom.IsValidReverseTarget())
+    {
+        reverse_heap.Insert(
+            target_phantom.reverse_segment_id.id,
+            target_phantom.GetReverseWeightPlusOffset(),
+            {target_phantom.reverse_segment_id.id, false, target_phantom.GetReverseDistance()});
+    }
+
     const PhantomEndpoints endpoints{source_phantom, target_phantom};
-    insertNodesInHeaps(forward_heap, reverse_heap, endpoints);
 
-    EdgeWeight weight = INVALID_EDGE_WEIGHT;
+    auto distance = searchDistance(
-    std::vector<NodeID> unpacked_nodes;
+        engine_working_data, facade, forward_heap, reverse_heap, {}, weight_upper_bound, endpoints);
-    std::vector<EdgeID> unpacked_edges;
-    std::tie(weight, unpacked_nodes, unpacked_edges) = search(engine_working_data,
-                                                              facade,
-                                                              forward_heap,
-                                                              reverse_heap,
-                                                              {},
-                                                              {},
-                                                              weight_upper_bound,
-                                                              endpoints);
 
-    if (weight == INVALID_EDGE_WEIGHT)
+    if (distance == INVALID_EDGE_DISTANCE)
     {
         return std::numeric_limits<double>::max();
     }
-
+    return from_alias<double>(distance);
-    std::vector<PathData> unpacked_path;
-
-    annotatePath(facade, endpoints, unpacked_nodes, unpacked_edges, unpacked_path);
-
-    return getPathDistance(facade, unpacked_path, source_phantom, target_phantom);
 }
 
 } // namespace osrm::engine::routing_algorithms::mld

include/engine/routing_algorithms/shortest_path_impl.hpp

@@ -19,8 +19,7 @@ void searchWithUTurn(SearchEngineData<Algorithm> &engine_working_data,
                      typename SearchEngineData<Algorithm>::QueryHeap &forward_heap,
                      typename SearchEngineData<Algorithm>::QueryHeap &reverse_heap,
                      const PhantomEndpointCandidates &candidates,
-                     const EdgeWeight &total_weight,
+                     EdgeWeight &leg_weight,
-                     EdgeWeight &new_total_weight,
                      std::vector<NodeID> &leg_packed_path)
 {
     forward_heap.Clear();
@@ -31,14 +30,14 @@ void searchWithUTurn(SearchEngineData<Algorithm> &engine_working_data,
         if (source.IsValidForwardSource())
         {
             forward_heap.Insert(source.forward_segment_id.id,
-                                total_weight - source.GetForwardWeightPlusOffset(),
+                                EdgeWeight{0} - source.GetForwardWeightPlusOffset(),
                                 source.forward_segment_id.id);
         }
 
         if (source.IsValidReverseSource())
         {
             forward_heap.Insert(source.reverse_segment_id.id,
-                                total_weight - source.GetReverseWeightPlusOffset(),
+                                EdgeWeight{0} - source.GetReverseWeightPlusOffset(),
                                 source.reverse_segment_id.id);
         }
     }
@@ -62,10 +61,9 @@ void searchWithUTurn(SearchEngineData<Algorithm> &engine_working_data,
            facade,
            forward_heap,
            reverse_heap,
-           new_total_weight,
+           leg_weight,
            leg_packed_path,
-           getForwardLoopNodes(candidates),
+           {},
-           getBackwardLoopNodes(candidates),
            candidates);
 }
 
@@ -125,8 +123,7 @@ void search(SearchEngineData<Algorithm> &engine_working_data,
                reverse_heap,
                new_total_weight_to_forward,
                leg_packed_path_forward,
-               getForwardLoopNodes(candidates),
+               getForwardForceNodes(candidates),
-               {},
                candidates);
     }
 
@@ -165,8 +162,7 @@ void search(SearchEngineData<Algorithm> &engine_working_data,
                reverse_heap,
                new_total_weight_to_reverse,
                leg_packed_path_reverse,
-               {},
+               getBackwardForceNodes(candidates),
-               getBackwardLoopNodes(candidates),
                candidates);
     }
 }
@@ -248,7 +244,8 @@ constructRouteResult(const DataFacade<Algorithm> &facade,
         auto source_it =
             std::find_if(source_candidates.begin(),
                          source_candidates.end(),
-                         [&start_node](const auto &source_phantom) {
+                         [&start_node](const auto &source_phantom)
+                         {
                              return (start_node == source_phantom.forward_segment_id.id ||
                                      start_node == source_phantom.reverse_segment_id.id);
                          });
@@ -257,7 +254,8 @@ constructRouteResult(const DataFacade<Algorithm> &facade,
         auto target_it =
             std::find_if(target_candidates.begin(),
                          target_candidates.end(),
-                         [&end_node](const auto &target_phantom) {
+                         [&end_node](const auto &target_phantom)
+                         {
                              return (end_node == target_phantom.forward_segment_id.id ||
                                      end_node == target_phantom.reverse_segment_id.id);
                          });
@@ -302,7 +300,7 @@ shortestPathWithWaypointUTurns(SearchEngineData<Algorithm> &engine_working_data,
         PhantomEndpointCandidates search_candidates{waypoint_candidates[i],
                                                     waypoint_candidates[i + 1]};
         std::vector<NodeID> packed_leg;
-        EdgeWeight new_total_weight = INVALID_EDGE_WEIGHT;
+        EdgeWeight leg_weight = INVALID_EDGE_WEIGHT;
 
         // We have a valid path up to this leg
         BOOST_ASSERT(total_weight != INVALID_EDGE_WEIGHT);
@@ -311,16 +309,15 @@ shortestPathWithWaypointUTurns(SearchEngineData<Algorithm> &engine_working_data,
                         forward_heap,
                         reverse_heap,
                         search_candidates,
-                        total_weight,
+                        leg_weight,
-                        new_total_weight,
                         packed_leg);
 
-        if (new_total_weight == INVALID_EDGE_WEIGHT)
+        if (leg_weight == INVALID_EDGE_WEIGHT)
             return {};
 
         packed_leg_begin.push_back(total_packed_path.size());
         total_packed_path.insert(total_packed_path.end(), packed_leg.begin(), packed_leg.end());
-        total_weight = new_total_weight;
+        total_weight += leg_weight;
     };
 
     // Add sentinel
@@ -466,16 +463,16 @@ struct route_state
         last.total_weight_to_forward.resize(init_candidates.size(), {0});
         last.total_weight_to_reverse.resize(init_candidates.size(), {0});
         // Initialize routability from source validity.
-        std::transform(
+        std::transform(init_candidates.begin(),
-            init_candidates.begin(),
+                       init_candidates.end(),
-            init_candidates.end(),
+                       std::back_inserter(last.reached_forward_node_target),
-            std::back_inserter(last.reached_forward_node_target),
+                       [](const PhantomNode &phantom_node)
-            [](const PhantomNode &phantom_node) { return phantom_node.IsValidForwardSource(); });
+                       { return phantom_node.IsValidForwardSource(); });
-        std::transform(
+        std::transform(init_candidates.begin(),
-            init_candidates.begin(),
+                       init_candidates.end(),
-            init_candidates.end(),
+                       std::back_inserter(last.reached_reverse_node_target),
-            std::back_inserter(last.reached_reverse_node_target),
+                       [](const PhantomNode &phantom_node)
-            [](const PhantomNode &phantom_node) { return phantom_node.IsValidReverseSource(); });
+                       { return phantom_node.IsValidReverseSource(); });
     }
 
     bool completeLeg()
@@ -613,15 +610,21 @@ struct route_state
     {
         // Find the segment from final leg with the shortest path
         auto forward_range = util::irange<std::size_t>(0UL, last.total_weight_to_forward.size());
-        auto forward_min =
+        auto forward_min = std::min_element(
-            std::min_element(forward_range.begin(), forward_range.end(), [&](size_t a, size_t b) {
+            forward_range.begin(),
+            forward_range.end(),
+            [&](size_t a, size_t b)
+            {
                 return (last.total_weight_to_forward[a] < last.total_weight_to_forward[b] ||
                         (last.total_weight_to_forward[a] == last.total_weight_to_forward[b] &&
                          last.total_nodes_to_forward[a] < last.total_nodes_to_forward[b]));
             });
         auto reverse_range = util::irange<std::size_t>(0UL, last.total_weight_to_reverse.size());
-        auto reverse_min =
+        auto reverse_min = std::min_element(
-            std::min_element(reverse_range.begin(), reverse_range.end(), [&](size_t a, size_t b) {
+            reverse_range.begin(),
+            reverse_range.end(),
+            [&](size_t a, size_t b)
+            {
                 return (last.total_weight_to_reverse[a] < last.total_weight_to_reverse[b] ||
                         (last.total_weight_to_reverse[a] == last.total_weight_to_reverse[b] &&
                          last.total_nodes_to_reverse[a] < last.total_nodes_to_reverse[b]));

include/engine/search_engine_data.hpp

@@ -12,7 +12,6 @@ namespace osrm::engine
 
 // Algorithm-dependent heaps
 // - CH algorithms use CH heaps
-// - CoreCH algorithms use CH
 // - MLD algorithms use MLD heaps
 
 template <typename Algorithm> struct SearchEngineData
@@ -47,6 +46,7 @@ template <> struct SearchEngineData<routing_algorithms::ch::Algorithm>
                                                 util::UnorderedMapStorage<NodeID, int>>;
 
     using SearchEngineHeapPtr = boost::thread_specific_ptr<QueryHeap>;
+
     using ManyToManyHeapPtr = boost::thread_specific_ptr<ManyToManyQueryHeap>;
 
     static SearchEngineHeapPtr forward_heap_1;
@@ -56,6 +56,10 @@ template <> struct SearchEngineData<routing_algorithms::ch::Algorithm>
     static SearchEngineHeapPtr forward_heap_3;
     static SearchEngineHeapPtr reverse_heap_3;
     static ManyToManyHeapPtr many_to_many_heap;
+    static SearchEngineHeapPtr map_matching_forward_heap_1;
+    static SearchEngineHeapPtr map_matching_reverse_heap_1;
+
+    void InitializeOrClearMapMatchingThreadLocalStorage(unsigned number_of_nodes);
 
     void InitializeOrClearFirstThreadLocalStorage(unsigned number_of_nodes);
 
@@ -74,6 +78,19 @@ struct MultiLayerDijkstraHeapData
     MultiLayerDijkstraHeapData(NodeID p, bool from) : parent(p), from_clique_arc(from) {}
 };
 
+struct MapMatchingMultiLayerDijkstraHeapData
+{
+    NodeID parent;
+    bool from_clique_arc;
+    EdgeDistance distance = {0};
+    MapMatchingMultiLayerDijkstraHeapData(NodeID p) : parent(p), from_clique_arc(false) {}
+    MapMatchingMultiLayerDijkstraHeapData(NodeID p, bool from) : parent(p), from_clique_arc(from) {}
+    MapMatchingMultiLayerDijkstraHeapData(NodeID p, bool from, EdgeDistance d)
+        : parent(p), from_clique_arc(from), distance(d)
+    {
+    }
+};
+
 struct ManyToManyMultiLayerDijkstraHeapData : MultiLayerDijkstraHeapData
 {
     EdgeDuration duration;
@@ -104,16 +121,27 @@ template <> struct SearchEngineData<routing_algorithms::mld::Algorithm>
                                                 EdgeWeight,
                                                 ManyToManyMultiLayerDijkstraHeapData,
                                                 util::TwoLevelStorage<NodeID, int>>;
+    using MapMatchingQueryHeap = util::QueryHeap<NodeID,
+                                                 NodeID,
+                                                 EdgeWeight,
+                                                 MapMatchingMultiLayerDijkstraHeapData,
+                                                 util::TwoLevelStorage<NodeID, int>>;
 
     using SearchEngineHeapPtr = boost::thread_specific_ptr<QueryHeap>;
     using ManyToManyHeapPtr = boost::thread_specific_ptr<ManyToManyQueryHeap>;
+    using MapMatchingHeapPtr = boost::thread_specific_ptr<MapMatchingQueryHeap>;
 
     static SearchEngineHeapPtr forward_heap_1;
     static SearchEngineHeapPtr reverse_heap_1;
+    static MapMatchingHeapPtr map_matching_forward_heap_1;
+    static MapMatchingHeapPtr map_matching_reverse_heap_1;
+
     static ManyToManyHeapPtr many_to_many_heap;
 
     void InitializeOrClearFirstThreadLocalStorage(unsigned number_of_nodes,
                                                   unsigned number_of_boundary_nodes);
+    void InitializeOrClearMapMatchingThreadLocalStorage(unsigned number_of_nodes,
+                                                        unsigned number_of_boundary_nodes);
 
     void InitializeOrClearManyToManyThreadLocalStorage(unsigned number_of_nodes,
                                                        unsigned number_of_boundary_nodes);

include/extractor/class_data.hpp

@@ -27,9 +27,9 @@ inline auto getClassData(const std::size_t index)
 
 inline bool isValidClassName(const std::string &name)
 {
-    return std::find_if_not(name.begin(), name.end(), [](const auto c) {
+    return std::find_if_not(name.begin(),
-               return std::isalnum(c);
+                            name.end(),
-           }) == name.end();
+                            [](const auto c) { return std::isalnum(c); }) == name.end();
 }
 } // namespace osrm::extractor
 

include/extractor/extraction_helper_functions.hpp

@@ -125,9 +125,8 @@ inline std::string canonicalizeStringList(std::string strlist, const std::string
 
     // collapse spaces; this is needed in case we expand "; X" => ";  X" above
     // but also makes sense to do irregardless of the fact - canonicalizing strings.
-    const auto spaces = [](unsigned char lhs, unsigned char rhs) {
+    const auto spaces = [](unsigned char lhs, unsigned char rhs)
-        return ::isspace(lhs) && ::isspace(rhs);
+    { return ::isspace(lhs) && ::isspace(rhs); };
-    };
     auto it = std::unique(begin(strlist), end(strlist), spaces);
     strlist.erase(it, end(strlist));
 

include/extractor/extraction_relation.hpp

@@ -133,7 +133,8 @@ class ExtractionRelationContainer
             (void)res; // prevent unused warning in release
         }
 
-        auto MergeRefMap = [&](RelationRefMap &source, RelationRefMap &target) {
+        auto MergeRefMap = [&](RelationRefMap &source, RelationRefMap &target)
+        {
             for (auto it : source)
             {
                 auto &v = target[it.first];
@@ -151,7 +152,8 @@ class ExtractionRelationContainer
     const RelationIDList &GetRelations(const OsmIDTyped &member_id) const
     {
         auto getFromMap = [this](std::uint64_t id,
-                                 const RelationRefMap &map) -> const RelationIDList & {
+                                 const RelationRefMap &map) -> const RelationIDList &
+        {
             auto it = map.find(id);
             if (it != map.end())
                 return it->second;

include/extractor/extractor_callbacks.hpp

@@ -3,11 +3,9 @@
 
 #include "extractor/class_data.hpp"
 #include "extractor/turn_lane_types.hpp"
+#include "util/std_hash.hpp"
 #include "util/typedefs.hpp"
 
-#include <boost/functional/hash.hpp>
-#include <boost/optional/optional_fwd.hpp>
-
 #include <string>
 #include <unordered_map>
 
@@ -18,25 +16,6 @@ class Way;
 class Relation;
 } // namespace osmium
 
-namespace std
-{
-template <> struct hash<std::tuple<std::string, std::string, std::string, std::string, std::string>>
-{
-    std::size_t operator()(
-        const std::tuple<std::string, std::string, std::string, std::string, std::string> &mk)
-        const noexcept
-    {
-        std::size_t seed = 0;
-        boost::hash_combine(seed, std::get<0>(mk));
-        boost::hash_combine(seed, std::get<1>(mk));
-        boost::hash_combine(seed, std::get<2>(mk));
-        boost::hash_combine(seed, std::get<3>(mk));
-        boost::hash_combine(seed, std::get<4>(mk));
-        return seed;
-    }
-};
-} // namespace std
-
 namespace osrm::extractor
 {
 

include/extractor/files.hpp

@@ -453,7 +453,8 @@ void readRawNBGraph(const boost::filesystem::path &path,
     coordinates.resize(number_of_nodes);
     osm_node_ids.reserve(number_of_nodes);
     auto index = 0;
-    auto decode = [&](const auto &current_node) {
+    auto decode = [&](const auto &current_node)
+    {
         coordinates[index].lon = current_node.lon;
         coordinates[index].lat = current_node.lat;
         osm_node_ids.push_back(current_node.node_id);

include/extractor/internal_extractor_edge.hpp

@@ -7,8 +7,8 @@
 #include "util/typedefs.hpp"
 
 #include <boost/assert.hpp>
-#include <mapbox/variant.hpp>
 #include <utility>
+#include <variant>
 
 namespace osrm::extractor
 {

include/extractor/intersection/coordinate_extractor.hpp

@@ -1,16 +1,15 @@
 #ifndef OSRM_EXTRACTOR_INTERSECTION_COORDINATE_EXTRACTOR_HPP_
 #define OSRM_EXTRACTOR_INTERSECTION_COORDINATE_EXTRACTOR_HPP_
 
-#include <utility>
-#include <vector>
-
 #include "extractor/compressed_edge_container.hpp"
 #include "extractor/query_node.hpp"
 
-#include "util/attributes.hpp"
 #include "util/coordinate.hpp"
 #include "util/node_based_graph.hpp"
 
+#include <utility>
+#include <vector>
+
 namespace osrm::extractor::intersection
 {
 
@@ -27,17 +26,16 @@ class CoordinateExtractor
      * Note: The segment between intersection and turn coordinate can be zero, if the OSM modelling
      * is unfortunate. See https://github.com/Project-OSRM/osrm-backend/issues/3470
      */
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] util::Coordinate
-    util::Coordinate GetCoordinateAlongRoad(const NodeID intersection_node,
+    GetCoordinateAlongRoad(const NodeID intersection_node,
-                                            const EdgeID turn_edge,
+                           const EdgeID turn_edge,
-                                            const bool traversed_in_reverse,
+                           const bool traversed_in_reverse,
-                                            const NodeID to_node,
+                           const NodeID to_node,
-                                            const std::uint8_t number_of_in_lanes) const;
+                           const std::uint8_t number_of_in_lanes) const;
 
     // Given a set of precomputed coordinates, select the representative coordinate along the road
     // that best describes the turn
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] util::Coordinate
-    util::Coordinate
     ExtractRepresentativeCoordinate(const NodeID intersection_node,
                                     const EdgeID turn_edge,
                                     const bool traversed_in_reverse,
@@ -47,7 +45,7 @@ class CoordinateExtractor
 
     // instead of finding only a single coordinate, we can also list all coordinates along a
     // road.
-    OSRM_ATTR_WARN_UNUSED std::vector<util::Coordinate>
+    [[nodiscard]] std::vector<util::Coordinate>
     GetCoordinatesAlongRoad(const NodeID intersection_node,
                             const EdgeID turn_edge,
                             const bool traversed_in_reverse,
@@ -55,20 +53,18 @@ class CoordinateExtractor
 
     // wrapper in case of normal forward edges (traversed_in_reverse = false, to_node =
     // node_based_graph.GetTarget(turn_edge)
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] std::vector<util::Coordinate>
-    std::vector<util::Coordinate> GetForwardCoordinatesAlongRoad(const NodeID from,
+    GetForwardCoordinatesAlongRoad(const NodeID from, const EdgeID turn_edge) const;
-                                                                 const EdgeID turn_edge) const;
 
     // a less precise way to compute coordinates along a route. Due to the heavy interaction of
     // graph traversal and turn instructions, we often don't care for high precision. We only want
     // to check for available connections in order, or find (with room for error) the straightmost
     // turn. This function will offer a bit more error potential but allow for much higher
     // performance
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] util::Coordinate GetCoordinateCloseToTurn(const NodeID from_node,
-    util::Coordinate GetCoordinateCloseToTurn(const NodeID from_node,
+                                                            const EdgeID turn_edge,
-                                              const EdgeID turn_edge,
+                                                            const bool traversed_in_reverse,
-                                              const bool traversed_in_reverse,
+                                                            const NodeID to_node) const;
-                                              const NodeID to_node) const;
 
     /* When extracting the coordinates, we first extract all coordinates. We don't care about most
      * of them, though.
@@ -90,22 +86,19 @@ class CoordinateExtractor
      * The optional length cache needs to store the accumulated distance up to the respective
      * coordinate index [0,d(0,1),...]
      */
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] std::vector<util::Coordinate>
-    std::vector<util::Coordinate>
     TrimCoordinatesToLength(std::vector<util::Coordinate> coordinates,
                             const double desired_length,
                             const std::vector<double> &length_cache = {}) const;
 
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] std::vector<double>
-    std::vector<double> PrepareLengthCache(const std::vector<util::Coordinate> &coordinates,
+    PrepareLengthCache(const std::vector<util::Coordinate> &coordinates, const double limit) const;
-                                           const double limit) const;
 
     /* when looking at a set of coordinates, this function allows trimming the vector to a smaller,
      * only containing coordinates up to a given distance along the path. The last coordinate might
      * be interpolated
      */
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] std::vector<util::Coordinate>
-    std::vector<util::Coordinate>
     TrimCoordinatesByLengthFront(std::vector<util::Coordinate> coordinates,
                                  const double desired_length) const;
 
@@ -130,10 +123,9 @@ class CoordinateExtractor
      *
      * for fixpoint `b`, vector_base `d` and vector_head `e`
      */
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] util::Coordinate GetCorrectedCoordinate(const util::Coordinate fixpoint,
-    util::Coordinate GetCorrectedCoordinate(const util::Coordinate fixpoint,
+                                                          const util::Coordinate vector_base,
-                                            const util::Coordinate vector_base,
+                                                          const util::Coordinate vector_head) const;
-                                            const util::Coordinate vector_head) const;
 
     /* generate a uniform vector of coordinates in same range distances
      *
@@ -143,8 +135,7 @@ class CoordinateExtractor
      * Into:
      * x -- x -- x -- x -- x - x
      */
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] std::vector<util::Coordinate>
-    std::vector<util::Coordinate>
     SampleCoordinates(const std::vector<util::Coordinate> &coordinates,
                       const double length,
                       const double rate) const;

include/extractor/intersection/intersection_view.hpp

@@ -26,16 +26,14 @@ namespace osrm::extractor::intersection
 
 inline auto makeCompareAngularDeviation(const double angle)
 {
-    return [angle](const auto &lhs, const auto &rhs) {
+    return [angle](const auto &lhs, const auto &rhs)
-        return util::angularDeviation(lhs.angle, angle) < util::angularDeviation(rhs.angle, angle);
+    { return util::angularDeviation(lhs.angle, angle) < util::angularDeviation(rhs.angle, angle); };
-    };
 }
 
 inline auto makeExtractLanesForRoad(const util::NodeBasedDynamicGraph &node_based_graph)
 {
-    return [&node_based_graph](const auto &road) {
+    return [&node_based_graph](const auto &road)
-        return node_based_graph.GetEdgeData(road.eid).road_classification.GetNumberOfLanes();
+    { return node_based_graph.GetEdgeData(road.eid).road_classification.GetNumberOfLanes(); };
-    };
 }
 
 // When viewing an intersection from an incoming edge, we can transform a shape into a view which
@@ -63,7 +61,10 @@ template <typename Self> struct EnableShapeOps
     auto FindClosestBearing(double base_bearing) const
     {
         return std::min_element(
-            self()->begin(), self()->end(), [base_bearing](const auto &lhs, const auto &rhs) {
+            self()->begin(),
+            self()->end(),
+            [base_bearing](const auto &lhs, const auto &rhs)
+            {
                 return util::angularDeviation(lhs.perceived_bearing, base_bearing) <
                        util::angularDeviation(rhs.perceived_bearing, base_bearing);
             });
@@ -81,7 +82,8 @@ template <typename Self> struct EnableShapeOps
         BOOST_ASSERT(!self()->empty());
         auto initial = converter(self()->front());
 
-        const auto extract_maximal_value = [&initial, converter](const auto &road) {
+        const auto extract_maximal_value = [&initial, converter](const auto &road)
+        {
             initial = std::max(initial, converter(road));
             return false;
         };
@@ -191,8 +193,10 @@ template <typename Self> struct EnableIntersectionOps
     auto findClosestTurn(const double angle, const UnaryPredicate filter) const
     {
         BOOST_ASSERT(!self()->empty());
-        const auto candidate =
+        const auto candidate = boost::range::min_element(
-            boost::range::min_element(*self(), [angle, &filter](const auto &lhs, const auto &rhs) {
+            *self(),
+            [angle, &filter](const auto &lhs, const auto &rhs)
+            {
                 const auto filtered_lhs = filter(lhs), filtered_rhs = filter(rhs);
                 const auto deviation_lhs = util::angularDeviation(lhs.angle, angle),
                            deviation_rhs = util::angularDeviation(rhs.angle, angle);

include/extractor/intersection/node_based_graph_walker.hpp

@@ -11,8 +11,8 @@
 #include "util/typedefs.hpp"
 
 #include <boost/assert.hpp>
-#include <boost/optional.hpp>
 #include <cstdint>
+#include <optional>
 #include <utility>
 
 namespace osrm::extractor::intersection
@@ -42,10 +42,10 @@ class NodeBasedGraphWalker
      * selector not provinding any further edge to traverse)
      */
     template <class accumulator_type, class selector_type>
-    boost::optional<std::pair<NodeID, EdgeID>> TraverseRoad(NodeID starting_at_node_id,
+    std::optional<std::pair<NodeID, EdgeID>> TraverseRoad(NodeID starting_at_node_id,
-                                                            EdgeID following_edge_id,
+                                                          EdgeID following_edge_id,
-                                                            accumulator_type &accumulator,
+                                                          accumulator_type &accumulator,
-                                                            const selector_type &selector) const;
+                                                          const selector_type &selector) const;
 
   private:
     const util::NodeBasedDynamicGraph &node_based_graph;
@@ -111,11 +111,11 @@ struct SelectRoadByNameOnlyChoiceAndStraightness
      * traversal. If no such edge is found, return {} is allowed. Usually you want to choose some
      * form of obious turn to follow.
      */
-    boost::optional<EdgeID> operator()(const NodeID nid,
+    std::optional<EdgeID> operator()(const NodeID nid,
-                                       const EdgeID via_edge_id,
+                                     const EdgeID via_edge_id,
-                                       const IntersectionView &intersection,
+                                     const IntersectionView &intersection,
-                                       const util::NodeBasedDynamicGraph &node_based_graph,
+                                     const util::NodeBasedDynamicGraph &node_based_graph,
-                                       const EdgeBasedNodeDataContainer &node_data_container) const;
+                                     const EdgeBasedNodeDataContainer &node_data_container) const;
 
   private:
     const NameID desired_name_id;
@@ -138,11 +138,11 @@ struct SelectStraightmostRoadByNameAndOnlyChoice
      * traversal. If no such edge is found, return {} is allowed. Usually you want to choose some
      * form of obious turn to follow.
      */
-    boost::optional<EdgeID> operator()(const NodeID nid,
+    std::optional<EdgeID> operator()(const NodeID nid,
-                                       const EdgeID via_edge_id,
+                                     const EdgeID via_edge_id,
-                                       const IntersectionView &intersection,
+                                     const IntersectionView &intersection,
-                                       const util::NodeBasedDynamicGraph &node_based_graph,
+                                     const util::NodeBasedDynamicGraph &node_based_graph,
-                                       const EdgeBasedNodeDataContainer &node_data_container) const;
+                                     const EdgeBasedNodeDataContainer &node_data_container) const;
 
   private:
     const NameID desired_name_id;
@@ -187,7 +187,7 @@ struct IntersectionFinderAccumulator
 };
 
 template <class accumulator_type, class selector_type>
-boost::optional<std::pair<NodeID, EdgeID>>
+std::optional<std::pair<NodeID, EdgeID>>
 NodeBasedGraphWalker::TraverseRoad(NodeID current_node_id,
                                    EdgeID current_edge_id,
                                    accumulator_type &accumulator,
@@ -254,19 +254,19 @@ NodeBasedGraphWalker::TraverseRoad(NodeID current_node_id,
 
 struct SkipTrafficSignalBarrierRoadSelector
 {
-    boost::optional<EdgeID> operator()(const NodeID,
+    std::optional<EdgeID> operator()(const NodeID,
-                                       const EdgeID,
+                                     const EdgeID,
-                                       const IntersectionView &intersection,
+                                     const IntersectionView &intersection,
-                                       const util::NodeBasedDynamicGraph &,
+                                     const util::NodeBasedDynamicGraph &,
-                                       const EdgeBasedNodeDataContainer &) const
+                                     const EdgeBasedNodeDataContainer &) const
     {
         if (intersection.isTrafficSignalOrBarrier())
         {
-            return boost::make_optional(intersection[1].eid);
+            return std::make_optional(intersection[1].eid);
         }
         else
         {
-            return boost::none;
+            return std::nullopt;
         }
     }
 };

include/extractor/maneuver_override.hpp

@@ -8,10 +8,12 @@
 #include "turn_path.hpp"
 #include "util/integer_range.hpp"
 #include "util/log.hpp"
+#include "util/std_hash.hpp"
 #include "util/vector_view.hpp"
+
+#include <variant>
+
 #include <algorithm>
-#include <boost/functional/hash.hpp>
-#include <mapbox/variant.hpp>
 
 namespace osrm::extractor
 {
@@ -147,7 +149,6 @@ struct UnresolvedManeuverOverride
 namespace std
 {
 template <> struct hash<osrm::extractor::NodeBasedTurn>
-
 {
     using argument_type = osrm::extractor::NodeBasedTurn;
     using result_type = std::size_t;
@@ -155,9 +156,9 @@ template <> struct hash<osrm::extractor::NodeBasedTurn>
     {
 
         std::size_t seed = 0;
-        boost::hash_combine(seed, s.from);
+        hash_combine(seed, s.from);
-        boost::hash_combine(seed, s.via);
+        hash_combine(seed, s.via);
-        boost::hash_combine(seed, s.to);
+        hash_combine(seed, s.to);
 
         return seed;
     }

include/extractor/maneuver_override_relation_parser.hpp

@@ -3,7 +3,7 @@
 
 #include "maneuver_override.hpp"
 
-#include <boost/optional.hpp>
+#include <optional>
 #include <string>
 #include <vector>
 
@@ -55,7 +55,7 @@ class ManeuverOverrideRelationParser
 {
   public:
     ManeuverOverrideRelationParser();
-    boost::optional<InputManeuverOverride> TryParse(const osmium::Relation &relation) const;
+    std::optional<InputManeuverOverride> TryParse(const osmium::Relation &relation) const;
 };
 } // namespace osrm::extractor
 

include/extractor/node_restriction_map.hpp

@@ -32,9 +32,8 @@ template <typename RestrictionFilter> class NodeRestrictionMap
     // Find all restrictions applicable to (from,via,to) turns
     auto Restrictions(NodeID from, NodeID via, NodeID to) const
     {
-        const auto turnFilter = [this, to](const auto &restriction) {
+        const auto turnFilter = [this, to](const auto &restriction)
-            return index_filter(restriction) && restriction->IsTurnRestricted(to);
+        { return index_filter(restriction) && restriction->IsTurnRestricted(to); };
-        };
         return getRange(from, via) | boost::adaptors::filtered(turnFilter);
     };
 

include/extractor/profile_properties.hpp

@@ -7,11 +7,11 @@
 
 #include <boost/assert.hpp>
 #include <boost/numeric/conversion/cast.hpp>
-#include <boost/optional.hpp>
 
 #include <algorithm>
 #include <array>
 #include <cstdint>
+#include <optional>
 
 namespace osrm::extractor
 {
@@ -80,7 +80,7 @@ struct ProfileProperties
     }
 
     // Check if this classes are excludable
-    boost::optional<std::size_t> ClassesAreExcludable(ClassData classes) const
+    std::optional<std::size_t> ClassesAreExcludable(ClassData classes) const
     {
         auto iter = std::find(excludable_classes.begin(), excludable_classes.end(), classes);
         if (iter != excludable_classes.end())

include/extractor/restriction.hpp

@@ -1,12 +1,10 @@
 #ifndef RESTRICTION_HPP
 #define RESTRICTION_HPP
 
+#include "turn_path.hpp"
 #include "util/coordinate.hpp"
 #include "util/opening_hours.hpp"
 #include "util/typedefs.hpp"
-
-#include "mapbox/variant.hpp"
-#include "turn_path.hpp"
 #include <limits>
 
 namespace osrm::extractor

include/extractor/serialization.hpp

@@ -215,7 +215,6 @@ inline void read(storage::tar::FileReader &reader,
                  const std::string &name,
                  detail::NameTableImpl<Ownership> &name_table)
 {
-    std::string buffer;
     util::serialization::read(reader, name, name_table.indexed_data);
 }
 } // namespace osrm::extractor::serialization

include/extractor/traffic_signals.hpp

@@ -1,10 +1,11 @@
 #ifndef OSRM_EXTRACTOR_TRAFFIC_SIGNALS_HPP
 #define OSRM_EXTRACTOR_TRAFFIC_SIGNALS_HPP
 
+#include "util/std_hash.hpp"
 #include "util/typedefs.hpp"
 
-#include <boost/functional/hash.hpp>
 #include <unordered_set>
+#include <utility>
 
 namespace osrm::extractor
 {
@@ -12,23 +13,22 @@ namespace osrm::extractor
 struct TrafficSignals
 {
     std::unordered_set<NodeID> bidirectional_nodes;
-    std::unordered_set<std::pair<NodeID, NodeID>, boost::hash<std::pair<NodeID, NodeID>>>
+    std::unordered_set<std::pair<NodeID, NodeID>> unidirectional_segments;
-        unidirectional_segments;
 
     inline bool HasSignal(NodeID from, NodeID to) const
     {
-        return bidirectional_nodes.count(to) > 0 || unidirectional_segments.count({from, to}) > 0;
+        return bidirectional_nodes.contains(to) || unidirectional_segments.contains({from, to});
     }
 
     void Compress(NodeID from, NodeID via, NodeID to)
     {
         bidirectional_nodes.erase(via);
-        if (unidirectional_segments.count({via, to}))
+        if (unidirectional_segments.contains({via, to}))
         {
             unidirectional_segments.erase({via, to});
             unidirectional_segments.insert({from, to});
         }
-        if (unidirectional_segments.count({via, from}))
+        if (unidirectional_segments.contains({via, from}))
         {
             unidirectional_segments.erase({via, from});
             unidirectional_segments.insert({to, from});

include/extractor/turn_lane_types.hpp

@@ -3,10 +3,9 @@
 
 #include "util/concurrent_id_map.hpp"
 #include "util/integer_range.hpp"
+#include "util/std_hash.hpp"
 #include "util/typedefs.hpp"
 
-#include <boost/functional/hash.hpp>
-
 #include <bitset>
 #include <cstddef>
 #include <cstdint>
@@ -54,19 +53,7 @@ const constexpr Mask merge_to_right = 1u << 10u;
 
 using TurnLaneDescription = std::vector<TurnLaneType::Mask>;
 
-// hash function for TurnLaneDescription
+using LaneDescriptionMap = util::ConcurrentIDMap<TurnLaneDescription, LaneDescriptionID>;
-struct TurnLaneDescription_hash
-{
-    std::size_t operator()(const TurnLaneDescription &lane_description) const
-    {
-        std::size_t seed = 0;
-        boost::hash_range(seed, lane_description.begin(), lane_description.end());
-        return seed;
-    }
-};
-
-using LaneDescriptionMap =
-    util::ConcurrentIDMap<TurnLaneDescription, LaneDescriptionID, TurnLaneDescription_hash>;
 
 using TurnLanesIndexedArray =
     std::tuple<std::vector<std::uint32_t>, std::vector<TurnLaneType::Mask>>;

include/extractor/turn_path.hpp

@@ -4,7 +4,7 @@
 #include "util/typedefs.hpp"
 
 #include <algorithm>
-#include <mapbox/variant.hpp>
+#include <variant>
 #include <vector>
 
 namespace osrm::extractor
@@ -61,50 +61,50 @@ struct InputViaWayPath
 
 struct InputTurnPath
 {
-    mapbox::util::variant<InputViaNodePath, InputViaWayPath> node_or_way;
+    std::variant<InputViaNodePath, InputViaWayPath> node_or_way;
 
     TurnPathType Type() const
     {
-        BOOST_ASSERT(node_or_way.which() < TurnPathType::NUM_TURN_PATH_TYPES);
+        BOOST_ASSERT(node_or_way.index() < TurnPathType::NUM_TURN_PATH_TYPES);
-        return static_cast<TurnPathType>(node_or_way.which());
+        return static_cast<TurnPathType>(node_or_way.index());
     }
 
     OSMWayID From() const
     {
-        return node_or_way.which() == TurnPathType::VIA_NODE_TURN_PATH
+        return node_or_way.index() == TurnPathType::VIA_NODE_TURN_PATH
-                   ? mapbox::util::get<InputViaNodePath>(node_or_way).from
+                   ? std::get<InputViaNodePath>(node_or_way).from
-                   : mapbox::util::get<InputViaWayPath>(node_or_way).from;
+                   : std::get<InputViaWayPath>(node_or_way).from;
     }
 
     OSMWayID To() const
     {
-        return node_or_way.which() == TurnPathType::VIA_NODE_TURN_PATH
+        return node_or_way.index() == TurnPathType::VIA_NODE_TURN_PATH
-                   ? mapbox::util::get<InputViaNodePath>(node_or_way).to
+                   ? std::get<InputViaNodePath>(node_or_way).to
-                   : mapbox::util::get<InputViaWayPath>(node_or_way).to;
+                   : std::get<InputViaWayPath>(node_or_way).to;
     }
 
     InputViaWayPath &AsViaWayPath()
     {
-        BOOST_ASSERT(node_or_way.which() == TurnPathType::VIA_WAY_TURN_PATH);
+        BOOST_ASSERT(node_or_way.index() == TurnPathType::VIA_WAY_TURN_PATH);
-        return mapbox::util::get<InputViaWayPath>(node_or_way);
+        return std::get<InputViaWayPath>(node_or_way);
     }
 
     const InputViaWayPath &AsViaWayPath() const
     {
-        BOOST_ASSERT(node_or_way.which() == TurnPathType::VIA_WAY_TURN_PATH);
+        BOOST_ASSERT(node_or_way.index() == TurnPathType::VIA_WAY_TURN_PATH);
-        return mapbox::util::get<InputViaWayPath>(node_or_way);
+        return std::get<InputViaWayPath>(node_or_way);
     }
 
     InputViaNodePath &AsViaNodePath()
     {
-        BOOST_ASSERT(node_or_way.which() == TurnPathType::VIA_NODE_TURN_PATH);
+        BOOST_ASSERT(node_or_way.index() == TurnPathType::VIA_NODE_TURN_PATH);
-        return mapbox::util::get<InputViaNodePath>(node_or_way);
+        return std::get<InputViaNodePath>(node_or_way);
     }
 
     const InputViaNodePath &AsViaNodePath() const
     {
-        BOOST_ASSERT(node_or_way.which() == TurnPathType::VIA_NODE_TURN_PATH);
+        BOOST_ASSERT(node_or_way.index() == TurnPathType::VIA_NODE_TURN_PATH);
-        return mapbox::util::get<InputViaNodePath>(node_or_way);
+        return std::get<InputViaNodePath>(node_or_way);
     }
 };
 
@@ -175,63 +175,63 @@ struct ViaWayPath
 // between node/way paths
 struct TurnPath
 {
-    mapbox::util::variant<ViaNodePath, ViaWayPath> node_or_way;
+    std::variant<ViaNodePath, ViaWayPath> node_or_way;
 
     NodeID To() const
     {
-        return node_or_way.which() == TurnPathType::VIA_NODE_TURN_PATH
+        return node_or_way.index() == TurnPathType::VIA_NODE_TURN_PATH
-                   ? mapbox::util::get<ViaNodePath>(node_or_way).to
+                   ? std::get<ViaNodePath>(node_or_way).to
-                   : mapbox::util::get<ViaWayPath>(node_or_way).to;
+                   : std::get<ViaWayPath>(node_or_way).to;
     }
 
     NodeID From() const
     {
-        return node_or_way.which() == TurnPathType::VIA_NODE_TURN_PATH
+        return node_or_way.index() == TurnPathType::VIA_NODE_TURN_PATH
-                   ? mapbox::util::get<ViaNodePath>(node_or_way).from
+                   ? std::get<ViaNodePath>(node_or_way).from
-                   : mapbox::util::get<ViaWayPath>(node_or_way).from;
+                   : std::get<ViaWayPath>(node_or_way).from;
     }
 
     NodeID FirstVia() const
     {
-        if (node_or_way.which() == TurnPathType::VIA_NODE_TURN_PATH)
+        if (node_or_way.index() == TurnPathType::VIA_NODE_TURN_PATH)
         {
-            return mapbox::util::get<ViaNodePath>(node_or_way).via;
+            return std::get<ViaNodePath>(node_or_way).via;
         }
         else
         {
-            BOOST_ASSERT(!mapbox::util::get<ViaWayPath>(node_or_way).via.empty());
+            BOOST_ASSERT(!std::get<ViaWayPath>(node_or_way).via.empty());
-            return mapbox::util::get<ViaWayPath>(node_or_way).via[0];
+            return std::get<ViaWayPath>(node_or_way).via[0];
         }
     }
 
     ViaWayPath &AsViaWayPath()
     {
-        BOOST_ASSERT(node_or_way.which() == TurnPathType::VIA_WAY_TURN_PATH);
+        BOOST_ASSERT(node_or_way.index() == TurnPathType::VIA_WAY_TURN_PATH);
-        return mapbox::util::get<ViaWayPath>(node_or_way);
+        return std::get<ViaWayPath>(node_or_way);
     }
 
     const ViaWayPath &AsViaWayPath() const
     {
-        BOOST_ASSERT(node_or_way.which() == TurnPathType::VIA_WAY_TURN_PATH);
+        BOOST_ASSERT(node_or_way.index() == TurnPathType::VIA_WAY_TURN_PATH);
-        return mapbox::util::get<ViaWayPath>(node_or_way);
+        return std::get<ViaWayPath>(node_or_way);
     }
 
     ViaNodePath &AsViaNodePath()
     {
-        BOOST_ASSERT(node_or_way.which() == TurnPathType::VIA_NODE_TURN_PATH);
+        BOOST_ASSERT(node_or_way.index() == TurnPathType::VIA_NODE_TURN_PATH);
-        return mapbox::util::get<ViaNodePath>(node_or_way);
+        return std::get<ViaNodePath>(node_or_way);
     }
 
     const ViaNodePath &AsViaNodePath() const
     {
-        BOOST_ASSERT(node_or_way.which() == TurnPathType::VIA_NODE_TURN_PATH);
+        BOOST_ASSERT(node_or_way.index() == TurnPathType::VIA_NODE_TURN_PATH);
-        return mapbox::util::get<ViaNodePath>(node_or_way);
+        return std::get<ViaNodePath>(node_or_way);
     }
 
     TurnPathType Type() const
     {
-        BOOST_ASSERT(node_or_way.which() < TurnPathType::NUM_TURN_PATH_TYPES);
+        BOOST_ASSERT(node_or_way.index() < TurnPathType::NUM_TURN_PATH_TYPES);
-        return static_cast<TurnPathType>(node_or_way.which());
+        return static_cast<TurnPathType>(node_or_way.index());
     }
 
     bool operator==(const TurnPath &other) const

include/guidance/intersection_handler.hpp

@@ -15,11 +15,10 @@
 
 #include <algorithm>
 #include <cstddef>
+#include <optional>
 #include <utility>
 #include <vector>
 
-#include <boost/optional.hpp>
-
 namespace osrm::guidance
 {
 
@@ -129,7 +128,7 @@ class IntersectionHandler
     //     ^ via
     //
     // For this scenario returns intersection at `b` and `b`.
-    boost::optional<IntersectionHandler::IntersectionViewAndNode>
+    std::optional<IntersectionHandler::IntersectionViewAndNode>
     getNextIntersection(const NodeID at, const EdgeID via) const;
 
     bool isSameName(const EdgeID source_edge_id, const EdgeID target_edge_id) const;
@@ -187,11 +186,11 @@ IntersectionHandler::IsDistinctNarrowTurn(const EdgeID via_edge,
         node_data_container.GetAnnotation(candidate_data.annotation_data);
     auto const candidate_deviation = util::angularDeviation(candidate->angle, STRAIGHT_ANGLE);
 
-    auto const num_lanes = [](auto const &data) {
+    auto const num_lanes = [](auto const &data)
-        return data.flags.road_classification.GetNumberOfLanes();
+    { return data.flags.road_classification.GetNumberOfLanes(); };
-    };
 
-    auto const lanes_number_equal = [&](auto const &compare_data) {
+    auto const lanes_number_equal = [&](auto const &compare_data)
+    {
         // Check if the lanes number is the same going from the inbound edge to the compare road
         return num_lanes(compare_data) > 0 && num_lanes(compare_data) == num_lanes(via_edge_data);
     };
@@ -210,7 +209,8 @@ IntersectionHandler::IsDistinctNarrowTurn(const EdgeID via_edge,
 
     // check if there are other narrow turns are not considered passing a low category or simply
     // a link of the same type as the potentially obvious turn
-    auto const is_similar_turn = [&](auto const &road) {
+    auto const is_similar_turn = [&](auto const &road)
+    {
         // 1. Skip the candidate road
         if (road.eid == candidate->eid)
         {
@@ -405,7 +405,8 @@ IntersectionHandler::IsDistinctWideTurn(const EdgeID via_edge,
     // Deviation is larger than NARROW_TURN_ANGLE0 here for the candidate
     // check if there is any turn, that might look just as obvious, even though it might not
     // be allowed. Entry-allowed isn't considered a valid distinction criterion here
-    auto const is_similar_turn = [&](auto const &road) {
+    auto const is_similar_turn = [&](auto const &road)
+    {
         // 1. Skip over our candidate
         if (road.eid == candidate->eid)
             return false;
@@ -503,7 +504,8 @@ std::size_t IntersectionHandler::findObviousTurn(const EdgeID via_edge,
         node_data_container.GetAnnotation(via_edge_data.annotation_data);
 
     // implement a filter, taking out all roads of lower class or different names
-    auto const continues_on_name_with_higher_class = [&](auto const &road) {
+    auto const continues_on_name_with_higher_class = [&](auto const &road)
+    {
         // it needs to be possible to enter the road
         if (!road.entry_allowed)
             return true;
@@ -550,7 +552,8 @@ std::size_t IntersectionHandler::findObviousTurn(const EdgeID via_edge,
 
     // this check is not part of the main conditions, so that if the turn looks obvious from all
     // other perspectives, a mode change will not result in different classification
-    auto const to_index_if_valid = [&](auto const iterator) -> std::size_t {
+    auto const to_index_if_valid = [&](auto const iterator) -> std::size_t
+    {
         auto const &from_data = node_based_graph.GetEdgeData(via_edge);
         auto const &to_data = node_based_graph.GetEdgeData(iterator->eid);
 
@@ -577,7 +580,8 @@ std::size_t IntersectionHandler::findObviousTurn(const EdgeID via_edge,
 
     // opposed to before, we do not care about name changes, again: this is a filter, so internal
     // false/true will be negated for selection
-    auto const valid_of_higher_or_same_category = [&](auto const &road) {
+    auto const valid_of_higher_or_same_category = [&](auto const &road)
+    {
         if (!road.entry_allowed)
             return true;
 
@@ -640,7 +644,8 @@ std::size_t IntersectionHandler::findObviousTurn(const EdgeID via_edge,
     const auto all_roads_have_same_name =
         std::all_of(intersection.begin(),
                     intersection.end(),
-                    [id = via_edge_annotation.name_id, this](auto const &road) {
+                    [id = via_edge_annotation.name_id, this](auto const &road)
+                    {
                         auto const data_id = node_based_graph.GetEdgeData(road.eid).annotation_data;
                         auto const name_id = node_data_container.GetAnnotation(data_id).name_id;
                         return (name_id != EMPTY_NAMEID) && (name_id == id);

include/guidance/motorway_handler.hpp

@@ -7,7 +7,6 @@
 #include "guidance/intersection_handler.hpp"
 #include "guidance/is_through_street.hpp"
 
-#include "util/attributes.hpp"
 #include "util/node_based_graph.hpp"
 
 #include <vector>
@@ -42,18 +41,14 @@ class MotorwayHandler final : public IntersectionHandler
                             Intersection intersection) const override final;
 
   private:
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] Intersection handleSliproads(const NodeID intersection_node_id,
-    Intersection handleSliproads(const NodeID intersection_node_id,
+                                               Intersection intersection) const;
-                                 Intersection intersection) const;
 
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] Intersection fromMotorway(const EdgeID via_edge, Intersection intersection) const;
-    Intersection fromMotorway(const EdgeID via_edge, Intersection intersection) const;
 
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] Intersection fromRamp(const EdgeID via_edge, Intersection intersection) const;
-    Intersection fromRamp(const EdgeID via_edge, Intersection intersection) const;
 
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] Intersection fallback(Intersection intersection) const;
-    Intersection fallback(Intersection intersection) const;
 };
 
 } // namespace osrm::guidance

include/guidance/parsing_toolkit.hpp

@@ -7,8 +7,6 @@
 #include <boost/algorithm/string.hpp>
 #include <boost/tokenizer.hpp>
 
-#include "util/attributes.hpp"
-
 namespace osrm::extractor::guidance
 {
 
@@ -21,8 +19,7 @@ namespace osrm::extractor::guidance
 // will be corrected to left|throught, since the final lane is not drivable.
 // This is in contrast to a situation with lanes:psv:forward=0 (or not set) where left|through|
 // represents left|through|through
-OSRM_ATTR_WARN_UNUSED
+[[nodiscard]] inline std::string
-inline std::string
 trimLaneString(std::string lane_string, std::int32_t count_left, std::int32_t count_right)
 {
     if (count_left)
@@ -68,10 +65,10 @@ trimLaneString(std::string lane_string, std::int32_t count_left, std::int32_t co
 // turn:lanes=left|through|through|right
 // vehicle:lanes=yes|yes|no|yes
 // bicycle:lanes=yes|no|designated|yes
-OSRM_ATTR_WARN_UNUSED
+[[nodiscard]] inline std::string applyAccessTokens(std::string lane_string,
-inline std::string applyAccessTokens(std::string lane_string, const std::string &access_tokens)
+                                                   const std::string &access_tokens)
 {
-    typedef boost::tokenizer<boost::char_separator<char>> tokenizer;
+    using tokenizer = boost::tokenizer<boost::char_separator<char>>;
     boost::char_separator<char> sep("|", "", boost::keep_empty_tokens);
     tokenizer tokens(lane_string, sep);
     tokenizer access(access_tokens, sep);

include/guidance/sliproad_handler.hpp

@@ -9,10 +9,9 @@
 
 #include "util/node_based_graph.hpp"
 
+#include <optional>
 #include <vector>
 
-#include <boost/optional.hpp>
-
 namespace osrm::guidance
 {
 
@@ -43,9 +42,9 @@ class SliproadHandler final : public IntersectionHandler
                             Intersection intersection) const override final;
 
   private:
-    boost::optional<std::size_t> getObviousIndexWithSliproads(const EdgeID from,
+    std::optional<std::size_t> getObviousIndexWithSliproads(const EdgeID from,
-                                                              const Intersection &intersection,
+                                                            const Intersection &intersection,
-                                                              const NodeID at) const;
+                                                            const NodeID at) const;
 
     // Next intersection from `start` onto `onto` is too far away for a Siproad scenario
     bool nextIntersectionIsTooFarAway(const NodeID start, const EdgeID onto) const;

include/guidance/turn_analysis.hpp

@@ -17,7 +17,6 @@
 #include "guidance/turn_classification.hpp"
 #include "guidance/turn_handler.hpp"
 
-#include "util/attributes.hpp"
 #include "util/node_based_graph.hpp"
 
 #include <cstdint>
@@ -47,13 +46,11 @@ class TurnAnalysis
 
     /* Full Analysis Process for a single node/edge combination. Use with caution, as the process is
      * relatively expensive */
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] Intersection operator()(const NodeID node_prior_to_intersection,
-    Intersection operator()(const NodeID node_prior_to_intersection,
+                                          const EdgeID entering_via_edge) const;
-                            const EdgeID entering_via_edge) const;
 
     // Select turn types based on the intersection shape
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] Intersection
-    Intersection
     AssignTurnTypes(const NodeID from_node,
                     const EdgeID via_eid,
                     const extractor::intersection::IntersectionView &intersection) const;

include/guidance/turn_handler.hpp

@@ -8,12 +8,10 @@
 #include "guidance/intersection_handler.hpp"
 #include "guidance/is_through_street.hpp"
 
-#include "util/attributes.hpp"
 #include "util/node_based_graph.hpp"
 
-#include <boost/optional.hpp>
-
 #include <cstddef>
+#include <optional>
 #include <utility>
 #include <vector>
 
@@ -72,41 +70,38 @@ class TurnHandler final : public IntersectionHandler
 
     bool hasObvious(const EdgeID &via_edge, const Fork &fork) const;
 
-    boost::optional<Fork> findForkCandidatesByGeometry(Intersection &intersection) const;
+    std::optional<Fork> findForkCandidatesByGeometry(Intersection &intersection) const;
 
     bool isCompatibleByRoadClass(const Intersection &intersection, const Fork fork) const;
 
     // Dead end.
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] Intersection handleOneWayTurn(Intersection intersection) const;
-    Intersection handleOneWayTurn(Intersection intersection) const;
 
     // Mode Changes, new names...
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] Intersection handleTwoWayTurn(const EdgeID via_edge,
-    Intersection handleTwoWayTurn(const EdgeID via_edge, Intersection intersection) const;
+                                                Intersection intersection) const;
 
     // Forks, T intersections and similar
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] Intersection handleThreeWayTurn(const EdgeID via_edge,
-    Intersection handleThreeWayTurn(const EdgeID via_edge, Intersection intersection) const;
+                                                  Intersection intersection) const;
 
     // Handling of turns larger then degree three
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] Intersection handleComplexTurn(const EdgeID via_edge,
-    Intersection handleComplexTurn(const EdgeID via_edge, Intersection intersection) const;
+                                                 Intersection intersection) const;
 
     void
     handleDistinctConflict(const EdgeID via_edge, ConnectedRoad &left, ConnectedRoad &right) const;
 
     // Classification
-    boost::optional<Fork> findFork(const EdgeID via_edge, Intersection &intersection) const;
+    std::optional<Fork> findFork(const EdgeID via_edge, Intersection &intersection) const;
 
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] Intersection assignLeftTurns(const EdgeID via_edge,
-    Intersection assignLeftTurns(const EdgeID via_edge,
+                                               Intersection intersection,
-                                 Intersection intersection,
+                                               const std::size_t starting_at) const;
-                                 const std::size_t starting_at) const;
 
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] Intersection assignRightTurns(const EdgeID via_edge,
-    Intersection assignRightTurns(const EdgeID via_edge,
+                                                Intersection intersection,
-                                  Intersection intersection,
+                                                const std::size_t up_to) const;
-                                  const std::size_t up_to) const;
 };
 
 } // namespace osrm::guidance

include/guidance/turn_instruction.hpp

@@ -1,13 +1,13 @@
 #ifndef OSRM_GUIDANCE_TURN_INSTRUCTION_HPP_
 #define OSRM_GUIDANCE_TURN_INSTRUCTION_HPP_
 
-#include <algorithm>
-#include <cstdint>
-
 #include "guidance/roundabout_type.hpp"
-#include "util/attributes.hpp"
 #include "util/typedefs.hpp"
 
+#include <algorithm>
+#include <array>
+#include <cstdint>
+
 namespace osrm::guidance
 {
 
@@ -154,24 +154,23 @@ inline bool operator==(const TurnInstruction lhs, const TurnInstruction rhs)
 inline bool hasRoundaboutType(const TurnInstruction instruction)
 {
     using namespace guidance::TurnType;
-    const constexpr TurnType::Enum valid_types[] = {TurnType::EnterRoundabout,
+    const constexpr std::array<TurnType::Enum, 13> valid_types = {
-                                                    TurnType::EnterAndExitRoundabout,
+        TurnType::EnterRoundabout,
-                                                    TurnType::EnterRotary,
+        TurnType::EnterAndExitRoundabout,
-                                                    TurnType::EnterAndExitRotary,
+        TurnType::EnterRotary,
-                                                    TurnType::EnterRoundaboutIntersection,
+        TurnType::EnterAndExitRotary,
-                                                    TurnType::EnterAndExitRoundaboutIntersection,
+        TurnType::EnterRoundaboutIntersection,
-                                                    TurnType::EnterRoundaboutAtExit,
+        TurnType::EnterAndExitRoundaboutIntersection,
-                                                    TurnType::ExitRoundabout,
+        TurnType::EnterRoundaboutAtExit,
-                                                    TurnType::EnterRotaryAtExit,
+        TurnType::ExitRoundabout,
-                                                    TurnType::ExitRotary,
+        TurnType::EnterRotaryAtExit,
-                                                    TurnType::EnterRoundaboutIntersectionAtExit,
+        TurnType::ExitRotary,
-                                                    TurnType::ExitRoundaboutIntersection,
+        TurnType::EnterRoundaboutIntersectionAtExit,
-                                                    TurnType::StayOnRoundabout};
+        TurnType::ExitRoundaboutIntersection,
+        TurnType::StayOnRoundabout};
 
-    const auto *first = valid_types;
+    return std::find(valid_types.cbegin(), valid_types.cend(), instruction.type) !=
-    const auto *last = first + sizeof(valid_types) / sizeof(valid_types[0]);
+           valid_types.cend();
-
-    return std::find(first, last, instruction.type) != last;
 }
 
 inline bool entersRoundabout(const guidance::TurnInstruction instruction)
@@ -243,8 +242,7 @@ inline guidance::DirectionModifier::Enum getTurnDirection(const double angle)
 }
 
 // swaps left <-> right modifier types
-OSRM_ATTR_WARN_UNUSED
+[[nodiscard]] inline guidance::DirectionModifier::Enum
-inline guidance::DirectionModifier::Enum
 mirrorDirectionModifier(const guidance::DirectionModifier::Enum modifier)
 {
     const constexpr guidance::DirectionModifier::Enum results[] = {

include/guidance/turn_lane_augmentation.hpp

@@ -3,14 +3,12 @@
 
 #include "guidance/intersection.hpp"
 #include "guidance/turn_lane_data.hpp"
-#include "util/attributes.hpp"
 
 namespace osrm::guidance::lanes
 {
 
-OSRM_ATTR_WARN_UNUSED
+[[nodiscard]] LaneDataVector handleNoneValueAtSimpleTurn(LaneDataVector lane_data,
-LaneDataVector handleNoneValueAtSimpleTurn(LaneDataVector lane_data,
+                                                         const Intersection &intersection);
-                                           const Intersection &intersection);
 
 } // namespace osrm::guidance::lanes
 

include/guidance/turn_lane_data.hpp

@@ -2,7 +2,6 @@
 #define OSRM_GUIDANCE_TURN_LANE_DATA_HPP_
 
 #include "extractor/turn_lane_types.hpp"
-#include "util/attributes.hpp"
 #include "util/typedefs.hpp"
 #include <vector>
 
@@ -23,8 +22,8 @@ struct TurnLaneData
 using LaneDataVector = std::vector<TurnLaneData>;
 
 // convertes a string given in the OSM format into a TurnLaneData vector
-OSRM_ATTR_WARN_UNUSED
+[[nodiscard]] LaneDataVector
-LaneDataVector laneDataFromDescription(const extractor::TurnLaneDescription &turn_lane_description);
+laneDataFromDescription(const extractor::TurnLaneDescription &turn_lane_description);
 
 // Locate A Tag in a lane data vector (if multiple tags are set, the first one found is returned)
 LaneDataVector::const_iterator findTag(const extractor::TurnLaneType::Mask tag,

include/guidance/turn_lane_handler.hpp

@@ -9,7 +9,6 @@
 #include "guidance/turn_analysis.hpp"
 #include "guidance/turn_lane_data.hpp"
 
-#include "util/attributes.hpp"
 #include "util/guidance/turn_lanes.hpp"
 #include "util/node_based_graph.hpp"
 #include "util/typedefs.hpp"
@@ -68,8 +67,8 @@ class TurnLaneHandler
 
     ~TurnLaneHandler();
 
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] Intersection
-    Intersection assignTurnLanes(const NodeID at, const EdgeID via_edge, Intersection intersection);
+    assignTurnLanes(const NodeID at, const EdgeID via_edge, Intersection intersection);
 
   private:
     mutable std::atomic<std::size_t> count_handled;
@@ -108,24 +107,23 @@ class TurnLaneHandler
                               const Intersection &intersection) const;
 
     // in case of a simple intersection, assign the lane entries
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] Intersection simpleMatchTuplesToTurns(Intersection intersection,
-    Intersection simpleMatchTuplesToTurns(Intersection intersection,
+                                                        const LaneDataVector &lane_data,
-                                          const LaneDataVector &lane_data,
+                                                        const LaneDescriptionID lane_string_id);
-                                          const LaneDescriptionID lane_string_id);
 
     // partition lane data into lane data relevant at current turn and at next turn
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] std::pair<TurnLaneHandler::LaneDataVector, TurnLaneHandler::LaneDataVector>
-    std::pair<TurnLaneHandler::LaneDataVector, TurnLaneHandler::LaneDataVector> partitionLaneData(
+    partitionLaneData(const NodeID at,
-        const NodeID at, LaneDataVector turn_lane_data, const Intersection &intersection) const;
+                      LaneDataVector turn_lane_data,
+                      const Intersection &intersection) const;
 
     // Sliproad turns have a separated lane to the right/left of other depicted lanes. These lanes
     // are not necessarily separated clearly from the rest of the way. As a result, we combine both
     // lane entries for our output, while performing the matching with the separated lanes only.
-    OSRM_ATTR_WARN_UNUSED
+    [[nodiscard]] Intersection handleSliproadTurn(Intersection intersection,
-    Intersection handleSliproadTurn(Intersection intersection,
+                                                  const LaneDescriptionID lane_description_id,
-                                    const LaneDescriptionID lane_description_id,
+                                                  LaneDataVector lane_data,
-                                    LaneDataVector lane_data,
+                                                  const Intersection &previous_intersection);
-                                    const Intersection &previous_intersection);
 
     // get the lane data for an intersection
     void extractLaneData(const EdgeID via_edge,

include/guidance/turn_lane_matcher.hpp

@@ -5,7 +5,6 @@
 #include "guidance/turn_instruction.hpp"
 #include "guidance/turn_lane_data.hpp"
 
-#include "util/attributes.hpp"
 #include "util/guidance/turn_lanes.hpp"
 #include "util/node_based_graph.hpp"
 
@@ -34,12 +33,12 @@ findBestMatchForReverse(const extractor::TurnLaneType::Mask leftmost_tag,
 bool canMatchTrivially(const Intersection &intersection, const LaneDataVector &lane_data);
 
 // perform a trivial match on the turn lanes
-OSRM_ATTR_WARN_UNUSED
+[[nodiscard]] Intersection
-Intersection triviallyMatchLanesToTurns(Intersection intersection,
+triviallyMatchLanesToTurns(Intersection intersection,
-                                        const LaneDataVector &lane_data,
+                           const LaneDataVector &lane_data,
-                                        const util::NodeBasedDynamicGraph &node_based_graph,
+                           const util::NodeBasedDynamicGraph &node_based_graph,
-                                        const LaneDescriptionID lane_string_id,
+                           const LaneDescriptionID lane_string_id,
-                                        util::guidance::LaneDataIdMap &lane_data_to_id);
+                           util::guidance::LaneDataIdMap &lane_data_to_id);
 
 } // namespace osrm::guidance::lanes
 

include/nodejs/json_v8_renderer.hpp

@@ -29,7 +29,7 @@ struct V8Renderer
         for (const auto &keyValue : object.values)
         {
             Napi::Value child;
-            mapbox::util::apply_visitor(V8Renderer(env, child), keyValue.second);
+            std::visit(V8Renderer(env, child), keyValue.second);
             obj.Set(keyValue.first, child);
         }
         out = obj;
@@ -41,7 +41,7 @@ struct V8Renderer
         for (auto i = 0u; i < array.values.size(); ++i)
         {
             Napi::Value child;
-            mapbox::util::apply_visitor(V8Renderer(env, child), array.values[i]);
+            std::visit(V8Renderer(env, child), array.values[i]);
             a.Set(i, child);
         }
         out = a;

include/nodejs/node_osrm_support.hpp

@@ -24,11 +24,11 @@
 #include <boost/optional.hpp>
 
 #include <algorithm>
-#include <iostream>
 #include <iterator>
 #include <sstream>
 #include <stdexcept>
 #include <string>
+#include <variant>
 #include <vector>
 
 #include <exception>
@@ -51,7 +51,7 @@ struct PluginParameters
     bool renderToBuffer = false;
 };
 
-using ObjectOrString = typename mapbox::util::variant<osrm::json::Object, std::string>;
+using ObjectOrString = typename std::variant<osrm::json::Object, std::string>;
 
 template <typename ResultT> inline Napi::Value render(const Napi::Env &env, const ResultT &result);
 
@@ -62,18 +62,18 @@ template <> Napi::Value inline render(const Napi::Env &env, const std::string &r
 
 template <> Napi::Value inline render(const Napi::Env &env, const ObjectOrString &result)
 {
-    if (result.is<osrm::json::Object>())
+    if (std::holds_alternative<osrm::json::Object>(result))
     {
         // Convert osrm::json object tree into matching v8 object tree
         Napi::Value value;
-        renderToV8(env, value, result.get<osrm::json::Object>());
+        renderToV8(env, value, std::get<osrm::json::Object>(result));
         return value;
     }
     else
     {
         // Return the string object as a node Buffer
         return Napi::Buffer<char>::Copy(
-            env, result.get<std::string>().data(), result.get<std::string>().size());
+            env, std::get<std::string>(result).data(), std::get<std::string>(result).size());
     }
 }
 
@@ -96,7 +96,7 @@ inline void ParseResult(const osrm::Status &result_status, osrm::json::Object &r
 
     if (result_status == osrm::Status::Error)
     {
-        throw std::logic_error(code_iter->second.get<osrm::json::String>().value.c_str());
+        throw std::logic_error(std::get<osrm::json::String>(code_iter->second).value.c_str());
     }
 
     result.values.erase(code_iter);
@@ -296,24 +296,19 @@ inline engine_config_ptr argumentsToEngineConfig(const Napi::CallbackInfo &args)
         {
             engine_config->algorithm = osrm::EngineConfig::Algorithm::CH;
         }
-        else if (algorithm_str == "CoreCH")
-        {
-            engine_config->algorithm = osrm::EngineConfig::Algorithm::CH;
-        }
         else if (algorithm_str == "MLD")
         {
             engine_config->algorithm = osrm::EngineConfig::Algorithm::MLD;
         }
         else
         {
-            ThrowError(args.Env(), "algorithm option must be one of 'CH', 'CoreCH', or 'MLD'.");
+            ThrowError(args.Env(), "algorithm option must be one of 'CH', or 'MLD'.");
             return engine_config_ptr();
         }
     }
     else if (!algorithm.IsUndefined())
     {
-        ThrowError(args.Env(),
+        ThrowError(args.Env(), "algorithm option must be a string and one of 'CH', or 'MLD'.");
-                   "algorithm option must be a string and one of 'CH', 'CoreCH', or 'MLD'.");
         return engine_config_ptr();
     }
 

include/partitioner/bisection_graph.hpp

@@ -65,8 +65,8 @@ inline BisectionGraph makeBisectionGraph(const std::vector<util::Coordinate> &co
     result_edges.reserve(edges.size());
 
     // find the end of edges that belong to node_id
-    const auto advance_edge_itr = [&edges, &result_edges](const std::size_t node_id,
+    const auto advance_edge_itr = [&edges, &result_edges](const std::size_t node_id, auto edge_itr)
-                                                          auto edge_itr) {
+    {
         while (edge_itr != edges.end() && edge_itr->source == node_id)
         {
             result_edges.push_back(edge_itr->Reduce());
@@ -76,9 +76,9 @@ inline BisectionGraph makeBisectionGraph(const std::vector<util::Coordinate> &co
     };
 
     // create a bisection node, requires the ID of the node as well as the lower bound to its edges
-    const auto make_bisection_node = [&edges, &coordinates](const std::size_t node_id,
+    const auto make_bisection_node =
-                                                            const auto begin_itr,
+        [&edges, &coordinates](const std::size_t node_id, const auto begin_itr, const auto end_itr)
-                                                            const auto end_itr) {
+    {
         std::size_t range_begin = std::distance(edges.begin(), begin_itr);
         std::size_t range_end = std::distance(edges.begin(), end_itr);
         return BisectionGraph::NodeT(range_begin, range_end, coordinates[node_id], node_id);
@@ -102,9 +102,12 @@ std::vector<BisectionInputEdge> adaptToBisectionEdge(std::vector<InputEdge> edge
     std::vector<BisectionInputEdge> result;
     result.reserve(edges.size());
 
-    std::transform(begin(edges), end(edges), std::back_inserter(result), [](const auto &edge) {
+    std::transform(begin(edges),
-        return BisectionInputEdge{edge.source, edge.target};
+                   end(edges),
-    });
+                   std::back_inserter(result),
+                   [](const auto &edge) {
+                       return BisectionInputEdge{edge.source, edge.target};
+                   });
 
     return result;
 }

include/partitioner/cell_storage.hpp

@@ -298,7 +298,8 @@ template <storage::Ownership Ownership> class CellStorageImpl
                                                                    auto set_num_nodes_fn,
                                                                    auto set_boundary_offset_fn,
                                                                    auto begin,
-                                                                   auto end) {
+                                                                   auto end)
+            {
                 BOOST_ASSERT(std::distance(begin, end) > 0);
 
                 const auto cell_id = begin->first;
@@ -316,7 +317,8 @@ template <storage::Ownership Ownership> class CellStorageImpl
             util::for_each_range(
                 level_source_boundary.begin(),
                 level_source_boundary.end(),
-                [this, insert_cell_boundary](auto begin, auto end) {
+                [this, insert_cell_boundary](auto begin, auto end)
+                {
                     insert_cell_boundary(
                         source_boundary,
                         [](auto &cell, auto value) { cell.num_source_nodes = value; },
@@ -327,7 +329,8 @@ template <storage::Ownership Ownership> class CellStorageImpl
             util::for_each_range(
                 level_destination_boundary.begin(),
                 level_destination_boundary.end(),
-                [this, insert_cell_boundary](auto begin, auto end) {
+                [this, insert_cell_boundary](auto begin, auto end)
+                {
                     insert_cell_boundary(
                         destination_boundary,
                         [](auto &cell, auto value) { cell.num_destination_nodes = value; },

include/partitioner/edge_based_graph_reader.hpp

@@ -64,10 +64,13 @@ std::vector<OutputEdgeT> prepareEdgesForUsageInGraph(std::vector<extractor::Edge
     // sort into blocks of edges with same source + target
     // the we partition by the forward flag to sort all edges with a forward direction first.
     // the we sort by weight to ensure the first forward edge is the smallest forward edge
-    std::sort(begin(edges), end(edges), [](const auto &lhs, const auto &rhs) {
+    std::sort(begin(edges),
-        return std::tie(lhs.source, lhs.target, rhs.data.forward, lhs.data.weight) <
+              end(edges),
-               std::tie(rhs.source, rhs.target, lhs.data.forward, rhs.data.weight);
+              [](const auto &lhs, const auto &rhs)
-    });
+              {
+                  return std::tie(lhs.source, lhs.target, rhs.data.forward, lhs.data.weight) <
+                         std::tie(rhs.source, rhs.target, lhs.data.forward, rhs.data.weight);
+              });
 
     std::vector<OutputEdgeT> output_edges;
     output_edges.reserve(edges.size());
@@ -77,10 +80,11 @@ std::vector<OutputEdgeT> prepareEdgesForUsageInGraph(std::vector<extractor::Edge
         const NodeID source = begin_interval->source;
         const NodeID target = begin_interval->target;
 
-        auto end_interval =
+        auto end_interval = std::find_if_not(
-            std::find_if_not(begin_interval, edges.end(), [source, target](const auto &edge) {
+            begin_interval,
-                return std::tie(edge.source, edge.target) == std::tie(source, target);
+            edges.end(),
-            });
+            [source, target](const auto &edge)
+            { return std::tie(edge.source, edge.target) == std::tie(source, target); });
         BOOST_ASSERT(begin_interval != end_interval);
 
         // remove eigenloops
@@ -144,7 +148,8 @@ graphToEdges(const DynamicEdgeBasedGraph &edge_based_graph)
     auto max_turn_id = tbb::parallel_reduce(
         range,
         NodeID{0},
-        [&edge_based_graph](const auto range, NodeID initial) {
+        [&edge_based_graph](const auto range, NodeID initial)
+        {
             NodeID max_turn_id = initial;
             for (auto node = range.begin(); node < range.end(); ++node)
             {
@@ -159,26 +164,29 @@ graphToEdges(const DynamicEdgeBasedGraph &edge_based_graph)
         [](const NodeID lhs, const NodeID rhs) { return std::max(lhs, rhs); });
 
     std::vector<extractor::EdgeBasedEdge> edges(max_turn_id + 1);
-    tbb::parallel_for(range, [&](const auto range) {
+    tbb::parallel_for(
-        for (auto node = range.begin(); node < range.end(); ++node)
+        range,
+        [&](const auto range)
         {
-            for (auto edge : edge_based_graph.GetAdjacentEdgeRange(node))
+            for (auto node = range.begin(); node < range.end(); ++node)
             {
-                const auto &data = edge_based_graph.GetEdgeData(edge);
+                for (auto edge : edge_based_graph.GetAdjacentEdgeRange(node))
-                // we only need to save the forward edges, since the read method will
-                // convert from forward to bi-directional edges again
-                if (data.forward)
                 {
-                    auto target = edge_based_graph.GetTarget(edge);
+                    const auto &data = edge_based_graph.GetEdgeData(edge);
-                    BOOST_ASSERT(data.turn_id <= max_turn_id);
+                    // we only need to save the forward edges, since the read method will
-                    edges[data.turn_id] = extractor::EdgeBasedEdge{node, target, data};
+                    // convert from forward to bi-directional edges again
-                    // only save the forward edge
+                    if (data.forward)
-                    edges[data.turn_id].data.forward = true;
+                    {
-                    edges[data.turn_id].data.backward = false;
+                        auto target = edge_based_graph.GetTarget(edge);
+                        BOOST_ASSERT(data.turn_id <= max_turn_id);
+                        edges[data.turn_id] = extractor::EdgeBasedEdge{node, target, data};
+                        // only save the forward edge
+                        edges[data.turn_id].data.forward = true;
+                        edges[data.turn_id].data.backward = false;
+                    }
                 }
             }
-        }
+        });
-    });
 
     return edges;
 }

include/partitioner/multi_level_graph.hpp

@@ -159,10 +159,11 @@ class MultiLevelGraph : public util::StaticGraph<EdgeDataT, Ownership>
     auto GetHighestBorderLevel(const MultiLevelPartition &mlp, const ContainerT &edges) const
     {
         std::vector<LevelID> highest_border_level(edges.size());
-        std::transform(
+        std::transform(edges.begin(),
-            edges.begin(), edges.end(), highest_border_level.begin(), [&mlp](const auto &edge) {
+                       edges.end(),
-                return mlp.GetHighestDifferentLevel(edge.source, edge.target);
+                       highest_border_level.begin(),
-            });
+                       [&mlp](const auto &edge)
+                       { return mlp.GetHighestDifferentLevel(edge.source, edge.target); });
         return highest_border_level;
     }
 
@@ -175,7 +176,8 @@ class MultiLevelGraph : public util::StaticGraph<EdgeDataT, Ownership>
         tbb::parallel_sort(
             permutation.begin(),
             permutation.end(),
-            [&edges, &highest_border_level](const auto &lhs, const auto &rhs) {
+            [&edges, &highest_border_level](const auto &lhs, const auto &rhs)
+            {
                 // sort by source node and then by level in ascending order
                 return std::tie(edges[lhs].source, highest_border_level[lhs], edges[lhs].target) <
                        std::tie(edges[rhs].source, highest_border_level[rhs], edges[rhs].target);
@@ -201,11 +203,12 @@ class MultiLevelGraph : public util::StaticGraph<EdgeDataT, Ownership>
             auto level_begin = iter;
             for (auto level : util::irange<LevelID>(0, mlp.GetNumberOfLevels()))
             {
-                iter = std::find_if(
+                iter = std::find_if(iter,
-                    iter, edge_and_level_end, [node, level](const auto &edge_and_level) {
+                                    edge_and_level_end,
-                        return boost::get<0>(edge_and_level).source != node ||
+                                    [node, level](const auto &edge_and_level) {
-                               boost::get<1>(edge_and_level) != level;
+                                        return boost::get<0>(edge_and_level).source != node ||
-                    });
+                                               boost::get<1>(edge_and_level) != level;
+                                    });
                 EdgeOffset offset = std::distance(level_begin, iter);
                 node_to_edge_offset.push_back(offset);
             }

include/partitioner/multi_level_partition.hpp

@@ -207,7 +207,8 @@ template <storage::Ownership Ownership> class MultiLevelPartitionImpl final
         auto lidx = 0UL;
         util::for_each_pair(level_offsets.begin(),
                             level_offsets.begin() + num_level,
-                            [&](const auto offset, const auto next_offset) {
+                            [&](const auto offset, const auto next_offset)
+                            {
                                 // create mask that has `bits` ones at its LSBs.
                                 // 000011
                                 BOOST_ASSERT(offset <= NUM_PARTITION_BITS);
@@ -274,9 +275,8 @@ template <storage::Ownership Ownership> class MultiLevelPartitionImpl final
         {
             std::stable_sort(permutation.begin(),
                              permutation.end(),
-                             [&partition](const auto lhs, const auto rhs) {
+                             [&partition](const auto lhs, const auto rhs)
-                                 return partition[lhs] < partition[rhs];
+                             { return partition[lhs] < partition[rhs]; });
-                             });
         }
 
         // top down assign new cell ids

include/partitioner/partition_graph.hpp

@@ -21,7 +21,7 @@ template <typename Base> class NodeEntryWrapper : public Base
 {
   public:
     template <typename... Args>
-    NodeEntryWrapper(std::size_t edges_begin_, std::size_t edges_end_, Args &&... args)
+    NodeEntryWrapper(std::size_t edges_begin_, std::size_t edges_end_, Args &&...args)
         : Base(std::forward<Args>(args)...), edges_begin(edges_begin_), edges_end(edges_end_)
     {
     }
@@ -41,7 +41,7 @@ template <typename Base> class GraphConstructionWrapper : public Base
 {
   public:
     template <typename... Args>
-    GraphConstructionWrapper(const NodeID source_, Args &&... args)
+    GraphConstructionWrapper(const NodeID source_, Args &&...args)
         : Base(std::forward<Args>(args)...), source(source_)
     {
     }

include/partitioner/remove_unconnected.hpp

@@ -59,11 +59,13 @@ std::size_t removeUnconnectedBoundaryNodes(const GraphT &edge_based_graph,
 
                 if (level_index < static_cast<int>(partitions.size() - 1))
                 {
-                    auto new_end = std::remove_if(
+                    auto new_end =
-                        witnesses.begin(), witnesses.end(), [&](const auto &witness) {
+                        std::remove_if(witnesses.begin(),
-                            return partitions[level_index + 1][node] !=
+                                       witnesses.end(),
-                                   partitions[level_index + 1][witness.id];
+                                       [&](const auto &witness) {
-                        });
+                                           return partitions[level_index + 1][node] !=
+                                                  partitions[level_index + 1][witness.id];
+                                       });
                     witnesses.resize(new_end - witnesses.begin());
                 }
                 if (witnesses.size() == 0)
@@ -87,10 +89,12 @@ std::size_t removeUnconnectedBoundaryNodes(const GraphT &edge_based_graph,
                     }
                 }
 
-                auto best_witness = std::min_element(
+                auto best_witness =
-                    witnesses.begin(), witnesses.end(), [](const auto &lhs, const auto &rhs) {
+                    std::min_element(witnesses.begin(),
-                        return lhs.induced_border_edges < rhs.induced_border_edges;
+                                     witnesses.end(),
-                    });
+                                     [](const auto &lhs, const auto &rhs) {
+                                         return lhs.induced_border_edges < rhs.induced_border_edges;
+                                     });
                 BOOST_ASSERT(best_witness != witnesses.end());
 
                 // assign `node` to same subcells as `best_witness`

include/partitioner/reorder_first_last.hpp

@@ -30,10 +30,10 @@ void reorderFirstLast(RandomIt first, RandomIt last, std::size_t n, Comparator c
     // requirements.
     std::reverse_iterator<RandomIt> rfirst{last}, rlast{first + n};
 
-    const auto flipped = [](auto fn) {
+    const auto flipped = [](auto fn)
-        return [fn](auto &&lhs, auto &&rhs) {
+    {
-            return fn(std::forward<decltype(lhs)>(rhs), std::forward<decltype(rhs)>(lhs));
+        return [fn](auto &&lhs, auto &&rhs)
-        };
+        { return fn(std::forward<decltype(lhs)>(rhs), std::forward<decltype(rhs)>(lhs)); };
     };
 
     std::nth_element(rfirst, rfirst + (n - 1), rlast, flipped(comp));

include/server/api/base_parameters_grammar.hpp

@@ -74,16 +74,16 @@ struct BaseParametersGrammar : boost::spirit::qi::grammar<Iterator, Signature>
         : BaseParametersGrammar::base_type(root_rule)
     {
         const auto add_hint = [](engine::api::BaseParameters &base_parameters,
-                                 const std::vector<std::string> &hint_strings) {
+                                 const std::vector<std::string> &hint_strings)
+        {
             if (!hint_strings.empty())
             {
                 std::vector<engine::SegmentHint> location_hints(hint_strings.size());
                 std::transform(hint_strings.begin(),
                                hint_strings.end(),
                                location_hints.begin(),
-                               [](const auto &hint_string) {
+                               [](const auto &hint_string)
-                                   return engine::SegmentHint::FromBase64(hint_string);
+                               { return engine::SegmentHint::FromBase64(hint_string); });
-                               });
                 base_parameters.hints.push_back(engine::Hint{std::move(location_hints)});
             }
             else
@@ -94,15 +94,16 @@ struct BaseParametersGrammar : boost::spirit::qi::grammar<Iterator, Signature>
 
         const auto add_bearing =
             [](engine::api::BaseParameters &base_parameters,
-               boost::optional<boost::fusion::vector2<short, short>> bearing_range) {
+               boost::optional<boost::fusion::vector2<short, short>> bearing_range)
-                boost::optional<engine::Bearing> bearing;
+        {
-                if (bearing_range)
+            boost::optional<engine::Bearing> bearing;
-                {
+            if (bearing_range)
-                    bearing = engine::Bearing{boost::fusion::at_c<0>(*bearing_range),
+            {
-                                              boost::fusion::at_c<1>(*bearing_range)};
+                bearing = engine::Bearing{boost::fusion::at_c<0>(*bearing_range),
-                }
+                                          boost::fusion::at_c<1>(*bearing_range)};
-                base_parameters.bearings.push_back(std::move(bearing));
+            }
-            };
+            base_parameters.bearings.push_back(std::move(bearing));
+        };
 
         polyline_chars = qi::char_("a-zA-Z0-9_.--[]{}@?|\\%~`^");
         base64_char = qi::char_("a-zA-Z0-9--_=");
@@ -118,7 +119,8 @@ struct BaseParametersGrammar : boost::spirit::qi::grammar<Iterator, Signature>
 
         location_rule = (double_ > qi::lit(',') >
                          double_)[qi::_val = ph::bind(
-                                      [](double lon, double lat) {
+                                      [](double lon, double lat)
+                                      {
                                           return util::Coordinate(
                                               util::toFixed(util::UnsafeFloatLongitude{lon}),
                                               util::toFixed(util::UnsafeFloatLatitude{lat}));
@@ -126,19 +128,17 @@ struct BaseParametersGrammar : boost::spirit::qi::grammar<Iterator, Signature>
                                       qi::_1,
                                       qi::_2)];
 
-        polyline_rule = qi::as_string[qi::lit("polyline(") > +polyline_chars > ')']
+        polyline_rule =
-                                     [qi::_val = ph::bind(
+            qi::as_string[qi::lit("polyline(") > +polyline_chars > ')']
-                                          [](const std::string &polyline) {
+                         [qi::_val = ph::bind([](const std::string &polyline)
-                                              return engine::decodePolyline(polyline);
+                                              { return engine::decodePolyline(polyline); },
-                                          },
+                                              qi::_1)];
-                                          qi::_1)];
 
-        polyline6_rule = qi::as_string[qi::lit("polyline6(") > +polyline_chars > ')']
+        polyline6_rule =
-                                      [qi::_val = ph::bind(
+            qi::as_string[qi::lit("polyline6(") > +polyline_chars > ')']
-                                           [](const std::string &polyline) {
+                         [qi::_val = ph::bind([](const std::string &polyline)
-                                               return engine::decodePolyline<1000000>(polyline);
+                                              { return engine::decodePolyline<1000000>(polyline); },
-                                           },
+                                              qi::_1)];
-                                           qi::_1)];
 
         query_rule =
             ((location_rule % ';') | polyline_rule |

include/server/api/route_parameters_grammar.hpp

@@ -54,8 +54,9 @@ struct RouteParametersGrammar : public BaseParametersGrammar<Iterator, Signature
 #endif
         using AnnotationsType = engine::api::RouteParameters::AnnotationsType;
 
-        const auto add_annotation = [](engine::api::RouteParameters &route_parameters,
+        const auto add_annotation =
-                                       AnnotationsType route_param) {
+            [](engine::api::RouteParameters &route_parameters, AnnotationsType route_param)
+        {
             route_parameters.annotations_type = route_parameters.annotations_type | route_param;
             route_parameters.annotations =
                 route_parameters.annotations_type != AnnotationsType::None;

include/server/connection.hpp

@@ -14,18 +14,6 @@
 #include <memory>
 #include <vector>
 
-// workaround for incomplete std::shared_ptr compatibility in old boost versions
-#if BOOST_VERSION < 105300 || defined BOOST_NO_CXX11_SMART_PTR
-
-namespace boost
-{
-template <class T> const T *get_pointer(std::shared_ptr<T> const &p) { return p.get(); }
-
-template <class T> T *get_pointer(std::shared_ptr<T> &p) { return p.get(); }
-} // namespace boost
-
-#endif
-
 namespace osrm::server
 {
 

include/server/http/header.hpp

@@ -12,7 +12,7 @@ struct header
     // explicitly use default copy c'tor as adding move c'tor
     header &operator=(const header &other) = default;
     header(std::string name, std::string value) : name(std::move(name)), value(std::move(value)) {}
-    header(header &&other) : name(std::move(other.name)), value(std::move(other.value)) {}
+    header(header &&other) noexcept : name(std::move(other.name)), value(std::move(other.value)) {}
 
     void clear()
     {

include/server/service/base_service.hpp

@@ -5,7 +5,7 @@
 #include "osrm/osrm.hpp"
 #include "util/coordinate.hpp"
 
-#include <mapbox/variant.hpp>
+#include <variant>
 
 #include <string>
 #include <vector>

include/storage/io.hpp

@@ -18,6 +18,7 @@
 
 #include <cerrno>
 #include <cstring>
+#include <iostream>
 #include <tuple>
 #include <type_traits>
 

include/storage/serialization.hpp

@@ -66,7 +66,8 @@ void readBoolVector(tar::FileReader &reader, const std::string &name, VectorT &d
     using BlockType = std::uint64_t;
     constexpr std::uint64_t BLOCK_BITS = CHAR_BIT * sizeof(BlockType);
 
-    const auto decode = [&](const BlockType block) {
+    const auto decode = [&](const BlockType block)
+    {
         auto read_size = std::min<std::size_t>(count - index, BLOCK_BITS);
         unpackBits<VectorT, BlockType>(data, index, read_size, block);
         index += BLOCK_BITS;
@@ -87,7 +88,8 @@ void writeBoolVector(tar::FileWriter &writer, const std::string &name, const Vec
 
     // FIXME on old boost version the function_input_iterator does not work with lambdas
     // so we need to wrap it in a function here.
-    const std::function<BlockType()> encode_function = [&]() -> BlockType {
+    const std::function<BlockType()> encode_function = [&]() -> BlockType
+    {
         auto write_size = std::min<std::size_t>(count - index, BLOCK_BITS);
         auto packed = packBits<VectorT, BlockType>(data, index, write_size);
         index += BLOCK_BITS;