apply ModernCppStarter to the lib and fix memory leaks

.clang-format

@@ -0,0 +1,56 @@
+---
+BasedOnStyle: Google
+AlignAfterOpenBracket: 'AlwaysBreak'
+AllowAllConstructorInitializersOnNextLine: 'false'
+AllowAllParametersOfDeclarationOnNextLine: 'false'
+AlignConsecutiveMacros: 'true'
+AllowShortCaseLabelsOnASingleLine: 'true'
+AllowShortFunctionsOnASingleLine: 'None'
+AllowShortIfStatementsOnASingleLine: 'Never'
+AllowShortLoopsOnASingleLine: 'false'
+BreakBeforeBraces: Allman
+BinPackArguments: 'false'
+BinPackParameters: 'false'
+Cpp11BracedListStyle: 'false'
+ColumnLimit: 125 
+NamespaceIndentation: All
+SpaceAfterTemplateKeyword: 'false'
+SpaceBeforeCtorInitializerColon: 'true'
+SpaceBeforeInheritanceColon: 'true'
+SpaceBeforeParens: ControlStatements
+SpaceBeforeRangeBasedForLoopColon: 'true'
+SpaceInEmptyBlock: true
+Standard: 'Latest'
+IncludeCategories:
+  - Regex:           '^"(llvm|llvm-c|clang|clang-c)/'
+    Priority:        1
+    SortPriority:    3
+    CaseSensitive:   true
+  - Regex:           '^(<|")(windows.h)'
+    Priority:        1
+    SortPriority:    1
+  - Regex:           '^(<|")(processthreadsapi.h)'
+    Priority:        2
+    SortPriority:    2
+  - Regex:           '<[[:alnum:].]+>'
+    Priority:        5
+    SortPriority:    1
+  - Regex:           '<[[:alnum:].]+_+[[:alnum:].]+>'
+    Priority:        5
+    SortPriority:    4
+  - Regex:           '^((<|")(gtest|gmock|isl|json)/)'
+    Priority:        8
+    SortPriority:    5
+  - Regex:           '^((<|")(fmt/|fmtlog/))'
+    Priority:        11
+    SortPriority:    6
+  - Regex:           '^(<|")(arby)'
+    Priority:        8
+    SortPriority:    100
+  - Regex:           '^(<|")./'
+    Priority:        10
+    SortPriority:    101
+  - Regex:           '^(<|")(.*)'
+    Priority:        15
+    SortPriority:    7
+...

.clang-tidy

@@ -0,0 +1,6 @@
+---
+Checks: '*,-fuchsia-*,-google-*,-zircon-*,-abseil-*,-modernize-use-trailing-return-type,-llvm-*,-llvmlibc-*'
+CheckOptions: [{ key: misc-non-private-member-variables-in-classes, value: IgnoreClassesWithAllMemberVariablesBeingPublic }]
+WarningsAsErrors: ''
+HeaderFilterRegex: ''
+FormatStyle: none

.cmake-format

@@ -0,0 +1,57 @@
+format:
+  tab_size: 2
+  line_width: 100
+  dangle_parens: true
+
+parse:
+  additional_commands:
+    cpmaddpackage:
+      pargs:
+        nargs: '*'
+        flags: []
+      spelling: CPMAddPackage
+      kwargs: &cpmaddpackagekwargs
+        NAME: 1
+        FORCE: 1
+        VERSION: 1
+        GIT_TAG: 1
+        DOWNLOAD_ONLY: 1
+        GITHUB_REPOSITORY: 1
+        GITLAB_REPOSITORY: 1
+        GIT_REPOSITORY: 1
+        SVN_REPOSITORY: 1
+        SVN_REVISION: 1
+        SOURCE_DIR: 1
+        DOWNLOAD_COMMAND: 1
+        FIND_PACKAGE_ARGUMENTS: 1
+        NO_CACHE: 1
+        GIT_SHALLOW: 1
+        URL: 1
+        URL_HASH: 1
+        URL_MD5: 1
+        DOWNLOAD_NAME: 1
+        DOWNLOAD_NO_EXTRACT: 1
+        HTTP_USERNAME: 1
+        HTTP_PASSWORD: 1
+        OPTIONS: +
+    cpmfindpackage:
+      pargs:
+        nargs: '*'
+        flags: []
+      spelling: CPMFindPackage
+      kwargs: *cpmaddpackagekwargs
+    packageproject:
+      pargs:
+        nargs: '*'
+        flags: []
+      spelling: packageProject
+      kwargs:
+        NAME: 1
+        VERSION: 1
+        NAMESPACE: 1
+        INCLUDE_DIR: 1
+        INCLUDE_DESTINATION: 1
+        BINARY_DIR: 1
+        COMPATIBILITY: 1
+        VERSION_HEADER: 1
+        DEPENDENCIES: +

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,33 @@
+---
+name: Bug report
+about: Create a report to help me improve
+title: "[BUG]"
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Desktop (please complete the following information):**
+
+* OS: [e.g. Windows]
+* Version [e.g. 10]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/custom.md

@@ -0,0 +1,10 @@
+---
+name: Custom issue template
+about: Describe this issue template's purpose here.
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,25 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: "[FEATURE]"
+labels: enhancement
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated
+when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Provide usage examples**
+A few examples of how the feature should be used. Please make sure they are clear
+and concise.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/workflows/documentation.yaml

@@ -0,0 +1,37 @@
+name: Documentation
+
+on:
+  push:
+    tags:
+      - "*"
+
+env:
+  CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules
+
+jobs:
+  build:
+    name: Build and publish documentation
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/cache@v3
+        with:
+          path: "**/cpm_modules"
+          key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
+
+      - name: Install dependencies
+        run: |
+          brew install doxygen
+          pip3 install jinja2 Pygments
+
+      - name: Build
+        run: |
+          cmake -Sdocumentation -Bbuild
+          cmake --build build --target GenerateDocs
+
+      - name: Publish
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./build/doxygen/html

.github/workflows/install.yml

@@ -0,0 +1,44 @@
+name: Install
+
+on:
+  push:
+    branches:
+      - master
+      - main
+  pull_request:
+    branches:
+      - master
+      - main
+
+env:
+  CTEST_OUTPUT_ON_FAILURE: 1
+  CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/cache@v3
+        with:
+          path: "**/cpm_modules"
+          key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
+
+      - name: build and install library
+        run: |
+          cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=Release --log-level=DEBUG
+          sudo cmake --build build --target install --verbose -j4
+          rm -rf build
+
+      - name: configure
+        run: cmake -Stest -Bbuild -DTEST_INSTALLED_VERSION=1 -DCPM_DOWNLOAD_ALL=1 -DCPM_SOURCE_CACHE=~/.cache/cpm --log-level=DEBUG
+
+      - name: build
+        run: cmake --build build --config Debug -j4 --verbose
+
+      - name: test
+        run: |
+          cd build
+          ctest --build-config Debug -j4

.github/workflows/install_download_all.yml

@@ -0,0 +1,45 @@
+name: Install_CPM_DOWNLOAD_ALL
+
+on:
+  push:
+    branches:
+      - master
+      - main
+  pull_request:
+    branches:
+      - master
+      - main
+
+env:
+  CTEST_OUTPUT_ON_FAILURE: 1
+  CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/cache@v3
+        with:
+          path: "**/cpm_modules"
+          key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
+
+      - name: build and install library
+        run: |
+          cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=Release -DCPM_DOWNLOAD_ALL=1 --log-level=DEBUG
+          cmake --build build --target all -j4 --verbose
+          cmake --install ./build --prefix ./install_dir
+          rm -rf build
+
+      - name: configure
+        run: CMAKE_PREFIX_PATH="./install_dir" cmake -Stest -Bbuild -DTEST_INSTALLED_VERSION=1 -DCPM_DOWNLOAD_ALL=1 -DCPM_SOURCE_CACHE=~/.cache/cpm --log-level=DEBUG
+
+      - name: build
+        run: cmake --build build --config Debug -j4 --verbose
+
+      - name: test
+        run: |
+          cd build
+          ctest --build-config Debug -j4

.github/workflows/macos.yml

@@ -0,0 +1,38 @@
+name: MacOS
+
+on:
+  push:
+    branches:
+      - master
+      - main
+  pull_request:
+    branches:
+      - master
+      - main
+
+env:
+  CTEST_OUTPUT_ON_FAILURE: 1
+  CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules
+
+jobs:
+  build:
+    runs-on: macos-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/cache@v3
+        with:
+          path: "**/cpm_modules"
+          key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
+
+      - name: configure
+        run: cmake -Stest -Bbuild -DCMAKE_BUILD_TYPE=Debug --log-level=DEBUG
+
+      - name: build
+        run: cmake --build build -j4 --verbose
+
+      - name: test
+        run: |
+          cd build
+          ctest --build-config Debug -j4

.github/workflows/style.yml

@@ -0,0 +1,35 @@
+name: Style
+
+on:
+  push:
+    branches:
+      - master
+      - main
+  pull_request:
+    branches:
+      - master
+      - main
+
+env:
+  CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/cache@v3
+        with:
+          path: "**/cpm_modules"
+          key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
+
+      - name: Install format dependencies
+        run: pip3 install clang-format==14.0.6 cmake_format==0.6.11 pyyaml
+
+      - name: configure
+        run: cmake -Stest -Bbuild --log-level=DEBUG
+
+      - name: check style
+        run: cmake --build build --target check-format -j4 --verbose