Compilers version bump

.github/workflows/build-test-release.yml

@@ -69,11 +69,11 @@ jobs:
       - name: Install packages
         run: |
           sudo apt-get update
-          sudo apt-get install -y ninja-build gcc-14 g++-14 clang-18
-          sudo ln -s /usr/bin/clang-18 /usr/local/bin/clang
-          sudo ln -s /usr/bin/clang++-18 /usr/local/bin/clang++
-          sudo ln -s /usr/bin/gcc-14 /usr/local/bin/gcc
-          sudo ln -s /usr/bin/g++-14 /usr/local/bin/g++
+          sudo apt-get install -y ninja-build gcc-16 g++-16 clang-22
+          sudo ln -s /usr/bin/clang-22 /usr/local/bin/clang
+          sudo ln -s /usr/bin/clang++-22 /usr/local/bin/clang++
+          sudo ln -s /usr/bin/gcc-16 /usr/local/bin/gcc
+          sudo ln -s /usr/bin/g++-16 /usr/local/bin/g++
 
       - name: Install uv
         uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0

.github/workflows/check-build-reproducibility.yml

@@ -34,11 +34,11 @@ jobs:
       - name: Install packages
         run: |
           sudo apt-get update
-          sudo apt-get install -y ninja-build gcc-14 g++-14 clang-18
-          sudo ln -s /usr/bin/clang-18 /usr/local/bin/clang
-          sudo ln -s /usr/bin/clang++-18 /usr/local/bin/clang++
-          sudo ln -s /usr/bin/gcc-14 /usr/local/bin/gcc
-          sudo ln -s /usr/bin/g++-14 /usr/local/bin/g++
+          sudo apt-get install -y ninja-build gcc-16 g++-16 clang-22
+          sudo ln -s /usr/bin/clang-22 /usr/local/bin/clang
+          sudo ln -s /usr/bin/clang++-22 /usr/local/bin/clang++
+          sudo ln -s /usr/bin/gcc-16 /usr/local/bin/gcc
+          sudo ln -s /usr/bin/g++-16 /usr/local/bin/g++
 
       - name: Install uv
         uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0

.github/workflows/check-code-quality.yml

@@ -27,12 +27,17 @@ jobs:
       - name: Checkout
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
+      - name: Install packages
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y ninja-build gcc-16 g++-16
+
       - name: Install uv
         uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
 
       - name: Install most linters from uv
         run: |
-          CC=gcc-14 CXX=g++-14 uv sync --locked --group lint
+          CC=gcc-16 CXX=g++-16 uv sync --locked --group lint
 
       - name: Run mypy
         run: |

.github/workflows/clang-tidy.yml

@@ -53,9 +53,9 @@ jobs:
       - name: Install packages
         run: |
           sudo apt-get update
-          sudo apt-get install -y ninja-build clang-18 clang-tidy-18
-          sudo ln -s /usr/bin/clang-18 /usr/local/bin/clang
-          sudo ln -s /usr/bin/clang++-18 /usr/local/bin/clang++
+          sudo apt-get install -y ninja-build clang-22 clang-tidy-18
+          sudo ln -s /usr/bin/clang-22 /usr/local/bin/clang
+          sudo ln -s /usr/bin/clang++-22 /usr/local/bin/clang++
           sudo ln -s /usr/bin/clang-tidy-18 /usr/local/bin/clang-tidy
 
       - name: Install uv

.github/workflows/sonar.yml

@@ -25,7 +25,7 @@ jobs:
     env:
       BUILD_WRAPPER_OUT_DIR: build_wrapper_output_directory # Directory where build-wrapper output will be placed
       CMAKE_PREFIX_PATH: /home/linuxbrew/.linuxbrew
-      LLVM_COV: llvm-cov-18
+      LLVM_COV: llvm-cov-22
       HOMEBREW_FORCE_BREWED_CURL: 1
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
@@ -34,9 +34,9 @@ jobs:
       - name: Install packages
         run: |
           sudo apt-get update
-          sudo apt-get install -y ninja-build clang-18 lcov gcovr
-          sudo ln -s /usr/bin/clang-18 /usr/local/bin/clang
-          sudo ln -s /usr/bin/clang++-18 /usr/local/bin/clang++
+          sudo apt-get install -y ninja-build clang-22 lcov gcovr
+          sudo ln -s /usr/bin/clang-22 /usr/local/bin/clang
+          sudo ln -s /usr/bin/clang++-22 /usr/local/bin/clang++
       - name: Install uv
         uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
       - name: Install pgm-build-deps

.github/workflows/thread-sanitizer.yml

@@ -34,9 +34,9 @@ jobs:
       - name: Install packages
         run: |
           sudo apt-get update
-          sudo apt-get install -y ninja-build clang-18
-          sudo ln -s /usr/bin/clang-18 /usr/local/bin/clang
-          sudo ln -s /usr/bin/clang++-18 /usr/local/bin/clang++
+          sudo apt-get install -y ninja-build clang-22
+          sudo ln -s /usr/bin/clang-22 /usr/local/bin/clang
+          sudo ln -s /usr/bin/clang++-22 /usr/local/bin/clang++
 
       - name: Install uv
         uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0

.readthedocs.yaml

@@ -14,8 +14,8 @@ build:
     - graphviz
     - graphviz-tools
     - libgvplugin-neato-layout8
-    - gcc-14
-    - g++-14
+    - gcc-16
+    - g++-16
   tools:
     python: "3.14"
   jobs:
@@ -26,7 +26,7 @@ build:
     create_environment:
       - uv venv "${READTHEDOCS_VIRTUALENV_PATH}"
     install:
-      - CC=gcc-14 CXX=g++-14 UV_PROJECT_ENVIRONMENT="${READTHEDOCS_VIRTUALENV_PATH}" uv sync --locked --group doc
+      - CC=gcc-16 CXX=g++-16 UV_PROJECT_ENVIRONMENT="${READTHEDOCS_VIRTUALENV_PATH}" uv sync --locked --group doc
     post_install:
       # remove API DLL define in header
       - find power_grid_model_c/power_grid_model_c/include -name *.h -exec sed -i -r "s/#define PGM.*//g" {} \;

docs/advanced_documentation/build-guide.md

@@ -54,13 +54,13 @@ Below is a list of tested compilers:
 
 #### Linux
 
-* gcc >= 14.0:
-  * Version 14.x tested using the version in the `manylinux_2_28` container.
-  * Version 14.x tested using the `musllinux` build with custom compiler.
-  * Version 14.x tested in CI.
-* Clang >= 18.0:
-  * Version 18.x tested in CI.
-  * Version 18.x tested in CI with code quality checks.
+* gcc >= 16.0:
+  * Version 16.x tested using the version in the `manylinux_2_28` container.
+  * Version 16.x tested using the `musllinux` build with custom compiler.
+  * Version 16.x tested in CI.
+* Clang >= 22.0:
+  * Version 22.x tested in CI.
+  * Version 22.x tested in CI with code quality checks.
 
 ```{Admonition} Additional information
 Wheel builds for Linux are done inside containers using `cibuildwheel`:
@@ -72,10 +72,10 @@ These are handled automatically in CI. For local development, use your system's
 
 #### Windows
 
-* MSVC >= 19.0:
-  * Latest release tested in CI (e.g. Visual Studio 2022, IDE or build tools).
-* Clang CL >= 19.0:
-  * Latest release tested in CI (e.g. Visual Studio 2022, IDE or build tools).
+* MSVC >= 19.5.*:
+  * Latest release tested in CI (e.g. Visual Studio 2026, IDE or build tools).
+* Clang CL >= 20.1.8:
+  * Latest release tested in CI (e.g. Visual Studio 2026, IDE or build tools).
 
 #### macOS
 
@@ -85,7 +85,7 @@ These are handled automatically in CI. For local development, use your system's
 ```{note}
 Once your compiler of choice is installed, you need to define the environment variables `CC` and `CXX` to specify the
 compiler.
-For example `export CC=clang-18` and `export CXX=clang++-18` to select the `clang` compiler in Ubuntu.
+For example `export CC=clang-22` and `export CXX=clang++-22` to select the `clang` compiler in Ubuntu.
 ```
 
 ### Build System for CMake Project
@@ -263,7 +263,7 @@ At the time of writing, the set-up is done as follows:
 
 ```shell
 sudo apt update && sudo apt upgrade                     # make sure you're up to date
-sudo apt install build-essential gcc g++ clang-18 procps curl file git # install initial dependencies
+sudo apt install build-essential gcc g++ clang-22 procps curl file git # install initial dependencies
 ```
 
 Then install Homebrew using the setup recommendations in [Homebrew](https://brew.sh).
@@ -281,9 +281,9 @@ brew install \
 Append the following lines into the file `${HOME}/.bashrc` (required for `scikit-build` for the Python installation):
 
 ```shell
-export CXX=clang++  # or g++ or g++-14 or ...
-export CC=clang     # or gcc or gcc-14 or ...
-export LLVM_COV=llvm-cov-18      # only if you want to use one of the llvm features
+export CXX=clang++  # or g++ or g++-16 or ...
+export CC=clang     # or gcc or gcc-16 or ...
+export LLVM_COV=llvm-cov-22      # only if you want to use one of the llvm features
 export CLANG_TIDY=clang-tidy-18  # only if you want to use one of the clang-tidy presets
 ```
 
@@ -319,9 +319,9 @@ As a quick start, from the root of the repository:
 You need to install the MSVC compiler.
 You can either install the whole Visual Studio IDE or just the build tools.
 
-* [Visual Studio Build Tools](https://aka.ms/vs/17/release/vs_BuildTools.exe) (free)
+* [Visual Studio Build Tools](https://visualstudio.microsoft.com/downloads/#build-tools-for-visual-studio-2026) (free)
   * Select C++ build tools
-* Full [Visual Studio](https://visualstudio.microsoft.com/vs/) (All three versions are suitable.
+* Full [Visual Studio](https://visualstudio.microsoft.com/downloads/) (All three versions are suitable.
   Check the license!)
   * Select Desktop Development with C++
     * [Optional] Select `C++ Clang tools for Windows`

power_grid_model_c/power_grid_model/include/power_grid_model/common/statistics.hpp

@@ -248,10 +248,10 @@ template <symmetry_tag sym_type> struct PolarComplexRandVar {
     }
 };
 
-template <symmetry_tag sym, template <symmetry_tag> typename RandVarType>
-    requires std::same_as<RandVarType<sym>, UniformComplexRandVar<sym>> ||
-             std::same_as<RandVarType<sym>, IndependentComplexRandVar<sym>>
-inline auto conj(RandVarType<sym> var) {
+template <typename RandVarType>
+    requires std::same_as<RandVarType, UniformComplexRandVar<typename RandVarType::sym>> ||
+             std::same_as<RandVarType, IndependentComplexRandVar<typename RandVarType::sym>>
+inline auto conj(RandVarType var) {
     var.value = conj(var.value);
     return var;
 }
@@ -268,11 +268,12 @@ template <symmetry_tag sym> inline auto conj(PolarComplexRandVar<sym> var) {
 
 namespace statistics {
 // Var(s x) ≈ Var(x) * ||s||^2
-template <symmetry_tag sym, template <symmetry_tag> typename RandVarType>
-    requires is_in_list_c<RandVarType<sym>, UniformRealRandVar<sym>, IndependentRealRandVar<sym>,
-                          UniformComplexRandVar<sym>, IndependentComplexRandVar<sym>>
-inline auto scale(RandVarType<sym> const& var, double scale_factor) {
-    return RandVarType<sym>{.value = var.value * scale_factor, .variance = var.variance * abs2(scale_factor)};
+template <typename RandVarType>
+    requires is_in_list_c<
+        RandVarType, UniformRealRandVar<typename RandVarType::sym>, IndependentRealRandVar<typename RandVarType::sym>,
+        UniformComplexRandVar<typename RandVarType::sym>, IndependentComplexRandVar<typename RandVarType::sym>>
+inline auto scale(RandVarType const& var, double scale_factor) {
+    return RandVarType{.value = var.value * scale_factor, .variance = var.variance * abs2(scale_factor)};
 }
 
 template <typename RandVarType>
@@ -281,10 +282,11 @@ inline auto scale(RandVarType const& var, RealValue<asymmetric_t> const& scale_f
     return RandVarType{.value = var.value * scale_factor, .variance = var.variance * abs2(scale_factor)};
 }
 
-template <symmetry_tag sym, template <symmetry_tag> typename RandVarType>
-    requires is_in_list_c<RandVarType<sym>, UniformComplexRandVar<sym>, IndependentComplexRandVar<sym>>
-inline auto scale(RandVarType<sym> const& var, DoubleComplex const& scale_factor) {
-    return RandVarType<sym>{.value = var.value * scale_factor, .variance = var.variance * abs2(scale_factor)};
+template <typename RandVarType>
+    requires is_in_list_c<RandVarType, UniformComplexRandVar<typename RandVarType::sym>,
+                          IndependentComplexRandVar<typename RandVarType::sym>>
+inline auto scale(RandVarType const& var, DoubleComplex const& scale_factor) {
+    return RandVarType{.value = var.value * scale_factor, .variance = var.variance * abs2(scale_factor)};
 }
 
 inline auto scale(IndependentComplexRandVar<asymmetric_t> const& var, ComplexValue<asymmetric_t> const& scale_factor) {