upgrade compilers

Author: K-ballo

.github/workflows/test.yml

@@ -20,43 +20,58 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          # ── Linux / GCC 14 ──
+          # ── Linux / GCC 16 ──
           - os: ubuntu-24.04
-            compiler: gcc-14
+            compiler: gcc-16
             preset: dev-gcc
 
-          # ── Linux / Clang 18 ──
+          # ── Linux / Clang 22 ──
           - os: ubuntu-24.04
-            compiler: clang-18+libc++
+            compiler: clang-22+libc++
             preset: dev-clang-libcxx
 
-          # ── macOS 15 / AppleClang 16 ──
-          - os: macos-15
-            compiler: apple-clang-16
+          # ── macOS 26 / AppleClang 17 ──
+          - os: macos-26
+            compiler: apple-clang-17
             preset: dev-clang
 
-          # ── Windows 2022 / MSVC ──
-          - os: windows-2022
-            compiler: msvc
+          # ── Windows 2025 / MSVC 2026 ──
+          - os: windows-2025
+            compiler: msvc-2026
             preset: dev-msvc
 
     steps:
       - uses: actions/checkout@v5
 
       - name: Set up MSVC environment
-        if: matrix.compiler == 'msvc'
+        if: matrix.compiler == 'msvc-2026'
         shell: pwsh
         run: |
-          $vcvars = "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat"
+          $vsPath = & "${env:ProgramFiles(x86)}\Microsoft Visual Studio\Installer\vswhere.exe" `
+              -latest -property installationPath
+          $vcvars = "$vsPath\VC\Auxiliary\Build\vcvars64.bat"
           cmd /c "`"$vcvars`" && set" | ForEach-Object {
             if ($_ -match '^([^=]+)=(.*)$') {
               "$($Matches[1])=$($Matches[2])" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
             }
           }
 
-      - name: Install libc++
-        if: matrix.compiler == 'clang-18+libc++'
-        run: sudo apt-get install -y libc++-18-dev libc++abi-18-dev
+      - name: Install GCC 16
+        if: matrix.compiler == 'gcc-16'
+        run: |
+          sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
+          sudo apt-get update -q
+          sudo apt-get install -y gcc-16 g++-16
+          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-16 100 \
+                                   --slave /usr/bin/g++ g++ /usr/bin/g++-16
+
+      - name: Install Clang 22 + libc++
+        if: matrix.compiler == 'clang-22+libc++'
+        run: |
+          wget -q https://apt.llvm.org/llvm.sh
+          sudo bash llvm.sh 22 all
+          sudo update-alternatives --install /usr/bin/clang clang /usr/bin/clang-22 100 \
+                                   --slave /usr/bin/clang++ clang++ /usr/bin/clang++-22
 
       - name: Install Ninja
         if: runner.os == 'Linux'