Mpi collective

.clang-format

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+BasedOnStyle: Chromium
+TabWidth: 2
+IndentWidth: 2
+SortIncludes: CaseInsensitive
+Language: Cpp
+Standard: c++20
+QualifierAlignment: Right

.clang-tidy

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+---
+Checks: "*,
+        -abseil-*,
+        -altera-*,
+        -android-*,
+        -fuchsia-*,
+        -google-*,
+        -llvm*,
+        -modernize-use-trailing-return-type,
+        -zircon-*,
+        -readability-else-after-return,
+        -readability-static-accessed-through-instance,
+        -readability-avoid-const-params-in-decls,
+        -cppcoreguidelines-non-private-member-variables-in-classes,
+        -misc-non-private-member-variables-in-classes,
+"
+WarningsAsErrors: ''
+HeaderFilterRegex: ''
+FormatStyle:     none
+
+CheckOptions:
+  - key: readability-identifier-length.IgnoredVariableNames
+    value: 'x|y|z|i|j|k|G|Q'
+  - key: readability-identifier-length.IgnoredParameterNames
+    value: 'x|y|z|i|j|k|G|Q'
+
+
+
+
+

.devcontainer/Dockerfile

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+FROM mcr.microsoft.com/devcontainers/cpp:1-ubuntu-24.04
+
+ARG REINSTALL_CMAKE_VERSION_FROM_SOURCE="none"
+
+# Optionally install the cmake for vcpkg
+COPY ./reinstall-cmake.sh /tmp/
+
+RUN if [ "${REINSTALL_CMAKE_VERSION_FROM_SOURCE}" != "none" ]; then \
+        chmod +x /tmp/reinstall-cmake.sh && /tmp/reinstall-cmake.sh ${REINSTALL_CMAKE_VERSION_FROM_SOURCE}; \
+    fi \
+    && rm -f /tmp/reinstall-cmake.sh
+
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install ubuntu-dbgsym-keyring  \
+    && printf "deb http://ddebs.ubuntu.com noble main restricted universe multiverse\ndeb http://ddebs.ubuntu.com noble-updates main restricted universe multiverse\ndeb http://ddebs.ubuntu.com noble-proposed main restricted universe multiverse" | \
+    tee -a /etc/apt/sources.list.d/ddebs.list
+
+# [Optional] Uncomment this section to install additional vcpkg ports.
+RUN su vscode -c "export VCPKG_FORCE_SYSTEM_BINARIES=arm && ${VCPKG_ROOT}/vcpkg install catch2 fmt metis"
+
+# [Optional] Uncomment this section to install additional packages.
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+     && apt-get -y install gfortran openmpi-bin openmpi-bin-dbgsym libopenmpi-dev libopenmpi3t64 ninja-build clang-tidy cppcheck iwyu

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/cpp
+{
+	"name": "C++",
+	"build": {
+		"dockerfile": "Dockerfile"
+	},
+
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	// "features": {},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "gcc -v",
+
+	// Configure tool-specific properties.
+  "customizations" : {
+    "jetbrains" : {
+      "backend" : "CLion"
+    }
+  },
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}

.devcontainer/reinstall-cmake.sh

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+#!/usr/bin/env bash
+#-------------------------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+#-------------------------------------------------------------------------------------------------------------
+#
+set -e
+
+CMAKE_VERSION=${1:-"none"}
+
+if [ "${CMAKE_VERSION}" = "none" ]; then
+    echo "No CMake version specified, skipping CMake reinstallation"
+    exit 0
+fi
+
+# Cleanup temporary directory and associated files when exiting the script.
+cleanup() {
+    EXIT_CODE=$?
+    set +e
+    if [[ -n "${TMP_DIR}" ]]; then
+        echo "Executing cleanup of tmp files"
+        rm -Rf "${TMP_DIR}"
+    fi
+    exit $EXIT_CODE
+}
+trap cleanup EXIT
+
+
+echo "Installing CMake..."
+apt-get -y purge --auto-remove cmake
+mkdir -p /opt/cmake
+
+architecture=$(dpkg --print-architecture)
+case "${architecture}" in
+    arm64)
+        ARCH=aarch64 ;;
+    amd64)
+        ARCH=x86_64 ;;
+    *)
+        echo "Unsupported architecture ${architecture}."
+        exit 1
+        ;;
+esac
+
+CMAKE_BINARY_NAME="cmake-${CMAKE_VERSION}-linux-${ARCH}.sh"
+CMAKE_CHECKSUM_NAME="cmake-${CMAKE_VERSION}-SHA-256.txt"
+TMP_DIR=$(mktemp -d -t cmake-XXXXXXXXXX)
+
+echo "${TMP_DIR}"
+cd "${TMP_DIR}"
+
+curl -sSL "https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/${CMAKE_BINARY_NAME}" -O
+curl -sSL "https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/${CMAKE_CHECKSUM_NAME}" -O
+
+sha256sum -c --ignore-missing "${CMAKE_CHECKSUM_NAME}"
+sh "${TMP_DIR}/${CMAKE_BINARY_NAME}" --prefix=/opt/cmake --skip-license
+
+ln -s /opt/cmake/bin/cmake /usr/local/bin/cmake
+ln -s /opt/cmake/bin/ctest /usr/local/bin/ctest

.gersemirc

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+cache: true
+color: false
+definitions: [cmake]
+indent: 4
+line_length: 80
+list_expansion: favour-inlining
+quiet: false
+unsafe: false
+warn_about_unknown_commands: true
+workers: max

.gitignore

@@ -1,3 +1,6 @@
 .cache/
 build/
 deploy/
+.idea
+**/.DS_Store
+cmake-build-*

.gitmodules

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+[submodule "extern/caliper"]
+	path = extern/caliper
+	url = https://github.com/LLNL/Caliper.git