[clang] [clang][SYCL] Diagnose reference kernel parameters (PR #192957)

[Mariya Podchishchaeva via cfe-commits]

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@@ -0,0 +1,134 @@
+//===- unittests/AST/SubobjectVisitorTest.cpp - Subobject Visitor tests --===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/AST/SubobjectVisitor.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/DeclCXX.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+#include "clang/Tooling/Tooling.h"
+#include "gtest/gtest.h"
+#include <string>
+#include <vector>
+
+using namespace clang;
+using namespace clang::ast_matchers;
+using namespace clang::tooling;
+
+namespace {
+
+// Helper class to record visited subobjects
+class RecordingVisitor : public SubobjectVisitor<RecordingVisitor> {
+public:
+  std::vector<std::string> VisitedBases;
+  std::vector<std::string> VisitedFields;
+
+  RecordingVisitor(ASTContext &Ctx) : SubobjectVisitor<RecordingVisitor>(Ctx) {}
+
+  bool visitBaseSpecifierPre(CXXBaseSpecifier *BS) {
+    std::string Name = BS->getType()->getAsCXXRecordDecl()->getNameAsString();
+    VisitedBases.push_back(Name);
+    return true;
+  }
+
+  bool visitFieldDeclPre(FieldDecl *FD) {
+    std::string Name = FD->getNameAsString();
+    VisitedFields.push_back(Name);
+    return true;
+  }
+
+};
+
+// Helper function to get a CXXRecordDecl by name
+const CXXRecordDecl *getCXXRecordDecl(ASTUnit *AST, const std::string &Name) {
+  auto Result = match(cxxRecordDecl(hasName(Name)).bind("record"),
+                      AST->getASTContext());
+  if (Result.empty())
+    return nullptr;
+  return Result[0].getNodeAs<CXXRecordDecl>("record");
+}
+
+TEST(SubobjectVisitorTest, Basic) {
+  auto AST = buildASTFromCode(R"cpp(
+    struct Base {
+      int BaseF;
+    };
+    struct Inner {
+      int InnerF;
+    };
+    struct S : public Base {
+      int MemberF;
+      Inner StructF;
+    };
+  )cpp");
+  ASSERT_TRUE(AST.get());
+
+  const CXXRecordDecl *RD = getCXXRecordDecl(AST.get(), "S");
+  ASSERT_TRUE(RD);
+
+  RecordingVisitor Visitor(AST->getASTContext());
+  Visitor.visit(AST->getASTContext().getTagType(ElaboratedTypeKeyword::None,
+                                                 std::nullopt, RD, false));
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Fznamznon wrote:

That won't work because `TagDecl::getTypeForDecl()` has been deleted. https://clang.llvm.org/doxygen/classclang_1_1TagDecl.html#ae89281032c91af9f4ec5672220ca4798

https://github.com/llvm/llvm-project/pull/192957