Remove llvm 16 and 17 compatibility

.github/actions/Build_LLVM/action.yml

@@ -43,12 +43,6 @@ runs:
           ninja LLVMOrcDebugging -j ${{ env.ncpus }}
           ninja clingInterpreter -j ${{ env.ncpus }}
         else
-          # Apply patches
-          llvm_vers=$(echo "${{ matrix.clang-runtime }}" | tr '[:lower:]' '[:upper:]')
-          if [[ "${llvm_vers}" == "16" ]]||[[ "${llvm_vers}" == "17" ]]; then
-            git apply -v ../patches/llvm/clang${{ matrix.clang-runtime }}-*.patch
-            echo "Apply clang${{ matrix.clang-runtime }}-*.patch patches:"
-          fi
           cd build
           cmake -DLLVM_ENABLE_PROJECTS="${{ matrix.llvm_enable_projects}}" \
                 -DLLVM_TARGETS_TO_BUILD="${{ matrix.llvm_targets_to_build }}"  \
@@ -132,18 +126,6 @@ runs:
         }
         else
         {
-          cp -r ..\patches\llvm\clang${{ matrix.clang-runtime }}*
-          #FIXME: Apply patches without hardcoding
-          if ( "${{ matrix.clang-runtime }}" -imatch "16" )
-          {
-            git apply -v clang16-1-Value.patch
-            git apply -v clang16-2-CUDA.patch
-            git apply -v clang16-3-WeakRef.patch
-          }
-          elseif ( "${{ matrix.clang-runtime }}" -imatch "17" )
-          {
-            git apply -v clang17-1-NewOperator.patch
-          }
           cd build
           echo "Apply clang${{ matrix.clang-runtime }}-*.patch patches:"
           cmake -DLLVM_ENABLE_PROJECTS="${{ matrix.llvm_enable_projects}}"                   `

.github/workflows/clang-tidy-review.yml

@@ -23,9 +23,9 @@ jobs:
           python-version: "3.11"
 
       - name: Install LLVM and Clang
-        uses: KyleMayes/[email protected].3
+        uses: KyleMayes/[email protected].7
         with:
-          version: "17.0.6"
+          version: "20.1.4"
 
       - name: install lit
         run: pip install lit

.github/workflows/main.yml

@@ -56,22 +56,6 @@ jobs:
             cppyy: On
             llvm_enable_projects: "clang"
             llvm_targets_to_build: "host;NVPTX"
-          - name: ubu24-arm-gcc12-clang-repl-17-cppyy
-            os: ubuntu-24.04-arm
-            compiler: gcc-12
-            clang-runtime: '17'
-            cling: Off
-            cppyy: On
-            llvm_enable_projects: "clang"
-            llvm_targets_to_build: "host;NVPTX"
-          - name: ubu24-arm-gcc12-clang-repl-16
-            os: ubuntu-24.04-arm
-            compiler: gcc-12
-            clang-runtime: '16'
-            cling: Off
-            cppyy: Off
-            llvm_enable_projects: "clang"
-            llvm_targets_to_build: "host;NVPTX"
           - name: ubu24-arm-gcc9-clang18-cling-cppyy
             os: ubuntu-24.04-arm
             compiler: gcc-9
@@ -106,22 +90,6 @@ jobs:
             cppyy: On
             llvm_enable_projects: "clang"
             llvm_targets_to_build: "host;NVPTX"
-          - name: ubu24-x86-gcc12-clang-repl-17-cppyy
-            os: ubuntu-24.04
-            compiler: gcc-12
-            clang-runtime: '17'
-            cling: Off
-            cppyy: On
-            llvm_enable_projects: "clang"
-            llvm_targets_to_build: "host;NVPTX"
-          - name: ubu24-x86-gcc12-clang-repl-16
-            os: ubuntu-24.04
-            compiler: gcc-12
-            clang-runtime: '16'
-            cling: Off
-            cppyy: Off
-            llvm_enable_projects: "clang"
-            llvm_targets_to_build: "host;NVPTX"
           - name: ubu24-x86-gcc9-clang18-cling-cppyy
             os: ubuntu-24.04
             compiler: gcc-9
@@ -156,22 +124,6 @@ jobs:
             cppyy: On
             llvm_enable_projects: "clang"
             llvm_targets_to_build: "host"
-          - name: osx15-arm-clang-clang-repl-17-cppyy
-            os: macos-15
-            compiler: clang
-            clang-runtime: '17'
-            cling: Off
-            cppyy: On
-            llvm_enable_projects: "clang"
-            llvm_targets_to_build: "host"
-          - name: osx15-arm-clang-clang-repl-16
-            os: macos-15
-            compiler: clang
-            clang-runtime: '16'
-            cling: Off
-            cppyy: Off
-            llvm_enable_projects: "clang"
-            llvm_targets_to_build: "host"
           - name: osx15-arm-clang-clang18-cling-cppyy
             os: macos-15
             compiler: clang
@@ -206,21 +158,6 @@ jobs:
             cppyy: On
             llvm_enable_projects: "clang"
             llvm_targets_to_build: "host"
-          - name: osx13-x86-clang-clang-repl-17-cppyy
-            os: macos-13
-            compiler: clang
-            clang-runtime: '17'
-            cling: Off
-            cppyy: On
-            llvm_enable_projects: "clang"
-            llvm_targets_to_build: "host"
-          - name: osx13-x86-clang-clang-repl-16
-            os: macos-13
-            compiler: clang
-            clang-runtime: '16'
-            cling: Off
-            llvm_enable_projects: "clang"
-            llvm_targets_to_build: "host"
           - name: osx13-x86-clang-clang18-cling-cppyy
             os: macos-13
             compiler: clang

.readthedocs.yaml

@@ -9,8 +9,8 @@ build:
   tools:
     python: "3.11"
   apt_packages:
-    - clang-16
+    - clang-18
     - cmake
-    - libclang-16-dev
-    - llvm-16-dev
-    - llvm-16-tools
+    - libclang-18-dev
+    - llvm-18-dev
+    - llvm-18-tools

CMakeLists.txt

@@ -67,25 +67,13 @@ if( CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR )
 include(GNUInstallDirs)
   ## Define supported version of clang and llvm
 
-if (CPPINTEROP_USE_CLING)
   set(CLANG_MIN_SUPPORTED 18.0)
-else()
-  set(CLANG_MIN_SUPPORTED 16.0)
-endif(CPPINTEROP_USE_CLING)
   set(CLANG_MAX_SUPPORTED "20.1.x")
   set(CLANG_VERSION_UPPER_BOUND 21.0.0)
-if (CPPINTEROP_USE_CLING)
   set(LLD_MIN_SUPPORTED 18.0)
-else()
-  set(LLD_MIN_SUPPORTED 16.0)
-endif(CPPINTEROP_USE_CLING)
   set(LLD_MAX_SUPPORTED "20.1.x")
   set(LLD_VERSION_UPPER_BOUND 21.0.0)
-if (CPPINTEROP_USE_CLING)
   set(LLVM_MIN_SUPPORTED 18.0)
-else()
-  set(LLVM_MIN_SUPPORTED 16.0)
-endif(CPPINTEROP_USE_CLING)
   set(LLVM_MAX_SUPPORTED "20.1.x")
   set(LLVM_VERSION_UPPER_BOUND 21.0.0)
 
@@ -242,7 +230,7 @@ endif()
   message(STATUS "Found supported version: Clang ${CLANG_PACKAGE_VERSION}")
   message(STATUS "Using ClangConfig.cmake in: ${Clang_DIR}")
 
-  ## Clang 16 require c++17 or later.
+  ## Clang 18 require c++17 or later.
   if (NOT CMAKE_CXX_STANDARD)
     set (CMAKE_CXX_STANDARD 17)
   endif()

README.md

@@ -105,21 +105,6 @@ git clone --depth=1 --branch release/20.x https://github.com/llvm/llvm-project.g
 cd llvm-project
 ```
 
-For Clang 16 & 17, the following patches required for development work. To apply these patches on Linux and MacOS execute the following command(substitute `{version}` with your clang version):
-
-```bash
-git apply -v ../CppInterOp/patches/llvm/clang{version}-*.patch
-```
-
-and
-
-```powershell
-cp -r ..\CppInterOp\patches\llvm\clang{version}* .
-git apply -v clang{version}-*.patch
-```
-
-on Windows.
-
 ##### Build Clang-REPL
 
 Clang-REPL is an interpreter that CppInterOp works alongside. Build Clang (and

docs/DevelopersDocumentation.rst

@@ -41,23 +41,6 @@ Clone the 20.x release of the LLVM project repository.
    git clone --depth=1 --branch release/20.x https://github.com/llvm/llvm-project.git
    cd llvm-project
 
-For Clang 16 & 17, the following patches required for development work. To apply
-these patches on Linux and MacOS execute the following command(substitute
-`{version}` with your clang version):
-
-.. code:: bash
-
-   git apply -v ../CppInterOp/patches/llvm/clang{version}-*.patch
-
-and
-
-.. code:: powershell
-
-   cp -r ..\CppInterOp\patches\llvm\clang17* .
-   git apply -v clang{version}-*.patch
-
-on Windows.
-
 ******************
  Build Clang-REPL
 ******************

docs/InstallationAndUsage.rst

@@ -41,23 +41,6 @@ Clone the 20.x release of the LLVM project repository.
    git clone --depth=1 --branch release/20.x https://github.com/llvm/llvm-project.git
    cd llvm-project
 
-For Clang 16 & 17, the following patches required for development work. To apply
-these patches on Linux and MacOS execute the following command(substitute
-`{version}` with your clang version):
-
-.. code:: bash
-
-   git apply -v ../CppInterOp/patches/llvm/clang{version}-*.patch
-
-and
-
-.. code:: powershell
-
-   cp -r ..\CppInterOp\patches\llvm\clang17* .
-   git apply -v clang{version}-*.patch
-
-on Windows.
-
 ******************
  Build Clang-REPL
 ******************

lib/CppInterOp/CXCppInterOp.cpp

@@ -90,7 +90,6 @@ CXCursorKind cxcursor_getCursorKindForDecl(const Decl* D) {
   default:
     if (const auto* TD = dyn_cast<TagDecl>(D)) {
       switch (TD->getTagKind()) {
-#if CLANG_VERSION_MAJOR >= 18
       case TagTypeKind::Interface: // fall through
       case TagTypeKind::Struct:
         return CXCursor_StructDecl;
@@ -100,17 +99,6 @@ CXCursorKind cxcursor_getCursorKindForDecl(const Decl* D) {
         return CXCursor_UnionDecl;
       case TagTypeKind::Enum:
         return CXCursor_EnumDecl;
-#else
-      case TagTypeKind::TTK_Interface: // fall through
-      case TagTypeKind::TTK_Struct:
-        return CXCursor_StructDecl;
-      case TagTypeKind::TTK_Class:
-        return CXCursor_ClassDecl;
-      case TagTypeKind::TTK_Union:
-        return CXCursor_UnionDecl;
-      case TagTypeKind::TTK_Enum:
-        return CXCursor_EnumDecl;
-#endif
       }
     }
   }

lib/CppInterOp/Compatibility.h

@@ -59,14 +59,7 @@ static inline char* GetEnv(const char* Var_Name) {
   CXXSpecialMemberKind::MoveConstructor
 #endif
 
-#if LLVM_VERSION_MAJOR < 18
-#define starts_with startswith
-#define ends_with endswith
-#endif
-
-#if CLANG_VERSION_MAJOR >= 18
 #include "clang/Interpreter/CodeCompletion.h"
-#endif
 
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringRef.h"
@@ -342,7 +335,6 @@ inline void codeComplete(std::vector<std::string>& Results,
                          clang::Interpreter& I, const char* code,
                          unsigned complete_line = 1U,
                          unsigned complete_column = 1U) {
-#if CLANG_VERSION_MAJOR >= 18
   // FIXME: We should match the invocation arguments of the main interpreter.
   //        That can affect the returned completion results.
   auto CB = clang::IncrementalCompilerBuilder();
@@ -366,9 +358,6 @@ inline void codeComplete(std::vector<std::string>& Results,
   for (llvm::StringRef r : results)
     if (r.find(CC.Prefix) == 0)
       Results.push_back(r.str());
-#else
-  assert(false && "CodeCompletion API only available in Clang >= 18.");
-#endif
 }
 
 } // namespace compat