Add clang-tidy CI test

.clang-tidy

@@ -0,0 +1,60 @@
+Checks: '
+    -*,
+    bugprone-*,
+        -bugprone-easily-swappable-parameters,
+        -bugprone-implicit-widening-of-multiplication-result,
+        -bugprone-misplaced-widening-cast,
+        -bugprone-unchecked-optional-access,
+    cert-*,
+        -cert-err58-cpp,
+    clang-analyzer-*,
+        -clang-analyzer-optin.performance.Padding,
+        -clang-analyzer-optin.mpi.MPI-Checker,
+        -clang-analyzer-osx.*,
+        -clang-analyzer-optin.osx.*,
+    clang-diagnostic-*,
+    cppcoreguidelines-*,
+        -cppcoreguidelines-avoid-c-arrays,
+        -cppcoreguidelines-avoid-magic-numbers,
+        -cppcoreguidelines-avoid-non-const-global-variables,
+        -cppcoreguidelines-init-variables,
+        -cppcoreguidelines-macro-usage,
+        -cppcoreguidelines-narrowing-conversions,
+        -cppcoreguidelines-non-private-member-variables-in-classes,
+        -cppcoreguidelines-owning-memory,
+        -cppcoreguidelines-pro-*,
+    google-build-explicit-make-pair,
+    google-build-namespaces,
+    google-global-names-in-headers,
+    misc-*,
+        -misc-no-recursion,
+        -misc-non-private-member-variables-in-classes,
+    modernize-*,
+        -modernize-avoid-c-arrays,
+        -modernize-return-braced-init-list,
+        -modernize-use-trailing-return-type,
+    mpi-*,
+    performance-*,
+    portability-*,
+    readability-*,
+        -readability-convert-member-functions-to-static,
+        -readability-else-after-return,
+        -readability-function-cognitive-complexity,
+        -readability-identifier-length,
+        -readability-implicit-bool-conversion,
+        -readability-isolate-declaration,
+        -readability-magic-numbers,
+        -readability-named-parameter,
+        -readability-uppercase-literal-suffix
+    '
+
+CheckOptions:
+- key:          bugprone-narrowing-conversions.WarnOnIntegerToFloatingPointNarrowingConversion
+  value:        "false"
+- key:          misc-definitions-in-headers.HeaderFileExtensions
+  value:        "H,"
+- key:          modernize-pass-by-value.ValuesOnly
+  value:        "true"
+
+
+HeaderFilterRegex: 'multi_physics[a-z_A-Z0-9\/]+\.hp?p?$'

.github/workflows/clang_tidy.yml

@@ -0,0 +1,46 @@
+name: 🧹 clang-tidy
+
+on: [push, pull_request]
+
+jobs:
+  run_clang_tidy:
+    name: clang-tidy
+    runs-on: ubuntu-22.04
+    env: {CXXFLAGS: "-Werror -Wshadow -Woverloaded-virtual -Wunreachable-code -fsanitize=address -fsanitize=undefined"}
+    steps:
+    - uses: actions/checkout@v4
+    - name: install dependencies
+      run: .github/workflows/dependencies/clang15.sh
+    - name: Build & run clang-tidy
+      run: |
+
+        export CXX=$(which clang++-15)
+        export CC=$(which clang-15)
+
+
+        # The following wrapper ensures that only source files
+        # in WarpX/Source/* are actually processed by clang-tidy
+        #_______________________________
+        cat > clang_tidy_wrapper << EOF
+        #!/bin/bash
+        REGEX="[a-z_A-Z0-9\/]*multi_physics\/[a-z_A-Z0-9\/]+.cpp"
+        if [[ \$4 =~ \$REGEX ]];then
+          clang-tidy-15 \$@
+        fi
+        EOF
+        chmod +x clang_tidy_wrapper
+        #_____________________________________
+
+        rm -rf build_clang_tidy
+
+        cmake -S multi_physics/QED                \
+            -DCMAKE_CXX_CLANG_TIDY="$PWD/clang_tidy_wrapper;--system-headers=0;--config-file=$PWD/.clang-tidy" \
+            -B build_clang_tidy                   \
+            -DCMAKE_VERBOSE_MAKEFILE=ON           \
+            -DPXRMP_QED_TEST=ON                   \
+            -DPXRMP_KOKKOS_EXAMPLE=ON             \
+            -DKokkos_ENABLE_OPENMP=ON
+
+        cmake --build build_clang_tidy -j 4 2> build_clang_tidy/clang-tidy.log
+        cat build_clang_tidy/clang-tidy.log
+        if [[ $(wc -m <build_clang_tidy/clang-tidy.log) -gt 1 ]]; then exit 1; fi

.github/workflows/dependencies/clang15.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+#
+# Copyright 2023 The WarpX Community
+#
+# License: BSD-3-Clause-LBNL
+# Authors: Luca Fedeli
+
+set -eu -o pipefail
+
+# `man apt.conf`:
+#   Number of retries to perform. If this is non-zero APT will retry
+#   failed files the given number of times.
+echo 'Acquire::Retries "3";' | sudo tee /etc/apt/apt.conf.d/80-retries
+
+sudo apt-get -qqq update
+sudo apt-get install -y \
+    build-essential   \
+    cmake             \
+    clang-15          \
+    clang-tidy-15     \
+    libblas-dev       \
+    libc++-15-dev     \
+    libboost-dev      \
+    libboost-math-dev \
+    libboost-test-dev \
+    libomp-15-dev     \
+    python3-dev
+
+python3 -m pip install -U pip
+python3 -m pip install "pybind11[global]"

multi_physics/QED/QED_table_generator/CMakeLists.txt

@@ -18,8 +18,8 @@ set_target_properties(${name} PROPERTIES
 configure_file(table_inspector.ipynb
     ${CMAKE_BINARY_DIR}/tools/table_inspector.ipynb COPYONLY)
 
-# Require C++14 or newer
-target_compile_features(${name} PUBLIC cxx_std_14)
+# Require C++17 or newer
+target_compile_features(${name} PUBLIC cxx_std_17)
 set_target_properties(${name} PROPERTIES CXX_EXTENSIONS OFF)
 
 # Enable warnings