Add Compiler test

.github/workflows/ci_tests.yml

@@ -120,6 +120,60 @@ jobs:
       - name: Test Debug
         run: ctest --test-dir build --build-config Debug
 
+  compiler-test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        compilers:
+          - class: gnu
+            version: 14
+          - class: gnu
+            version: 13
+          - class: gnu
+            version: 12
+          - class: llvm
+            version: 20
+          - class: llvm
+            version: 19
+          - class: llvm
+            version: 18
+          - class: llvm
+            version: 17
+    container:
+      image: ghcr.io/wusatosi/cpp-docker:${{ matrix.compilers.class }}-${{ matrix.compilers.version }}
+    name: "Compiler: ${{ matrix.compilers.class }} ${{ matrix.compilers.version }}"
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Compiler
+        id: install-compiler
+        run: |
+          if [ "${{ matrix.compilers.class }}" = "gnu" ]; then
+            CC=gcc-${{ matrix.compilers.version }}
+            CXX=g++-${{ matrix.compilers.version }}
+          else
+            CC=clang-${{ matrix.compilers.version }}
+            CXX=clang++-${{ matrix.compilers.version }}
+          fi
+
+          echo "CC=$CC" >> "$GITHUB_OUTPUT"
+          echo "CXX=$CXX" >> "$GITHUB_OUTPUT"
+      - name: Configure CMake
+        run: |
+          cmake -B build -S . -DCMAKE_CXX_STANDARD=20
+        env:
+          CC: ${{ steps.install-compiler.outputs.CC }}
+          CXX: ${{ steps.install-compiler.outputs.CXX }}
+          CMAKE_GENERATOR: "Ninja Multi-Config"
+      - name: Build Debug
+        run: |
+          cmake --build build --config Debug --verbose
+          # cmake --build build --config Debug --target all_verify_interface_header_sets
+          cmake --install build --config Debug --prefix /tmp/beman.exemplar
+          find /tmp/beman.exemplar -type f
+      - name: Test Debug
+        run: ctest --test-dir build --build-config Debug
+
   create-issue-when-fault:
     runs-on: ubuntu-latest
     needs: [test]

README.md

@@ -74,9 +74,17 @@ template <int Capacity> inplace_vector<int, Capacity> fibonacci_to(int num) {
 
 Building this repository requires **C++20** or later.
 
+We will evaluate the possibility of partial support for C++17
+when constexpr is fully supported and tested.
+
 ### Dependencies
 
-TODO: tested platforms.
+Current implementation is tested against both GNU gcc and LLVM clang compilers.
+More specifically, gcc version 12 to 14, and clang version 17 to 20.
+Versions outside of this range will likely work as well,
+they are just not tested in our current infrastructure.
+We are working on expanding this range of compiler support,
+and aim to bring `inplace_vector` to MSVC soon!
 
 ### Instructions