[clang] [ASTMatchers] AST matcher support for ObjC pointers (PR #117021)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Rashmi Mudduluru (t-rasmud)

<details>
<summary>Changes</summary>

Add `ObjCInterfaceDecl` to the list of types supported by the `hasType` and `hasDeclaration` matchers, `ObjCObjectPointerType` to the list of types supported by `pointee`.

---
Full diff: https://github.com/llvm/llvm-project/pull/117021.diff


4 Files Affected:

- (modified) clang/include/clang/ASTMatchers/ASTMatchers.h (+3-2) 
- (modified) clang/include/clang/ASTMatchers/ASTMatchersInternal.h (+10-1) 
- (modified) clang/lib/ASTMatchers/ASTMatchersInternal.cpp (+1-1) 
- (modified) clang/unittests/ASTMatchers/ASTMatchersTraversalTest.cpp (+7) 


``````````diff
diff --git a/clang/include/clang/ASTMatchers/ASTMatchers.h b/clang/include/clang/ASTMatchers/ASTMatchers.h
index 4bcaa953a61af2..dc6d60a1bcd17f 100644
--- a/clang/include/clang/ASTMatchers/ASTMatchers.h
+++ b/clang/include/clang/ASTMatchers/ASTMatchers.h
@@ -4033,7 +4033,7 @@ AST_POLYMORPHIC_MATCHER_P_OVERLOAD(
 AST_POLYMORPHIC_MATCHER_P_OVERLOAD(
     hasType,
     AST_POLYMORPHIC_SUPPORTED_TYPES(Expr, FriendDecl, ValueDecl,
-                                    CXXBaseSpecifier),
+                                    CXXBaseSpecifier, ObjCInterfaceDecl),
     internal::Matcher<Decl>, InnerMatcher, 1) {
   QualType QT = internal::getUnderlyingType(Node);
   if (!QT.isNull())
@@ -7434,7 +7434,8 @@ extern const AstTypeMatcher<RValueReferenceType> rValueReferenceType;
 AST_TYPELOC_TRAVERSE_MATCHER_DECL(
     pointee, getPointee,
     AST_POLYMORPHIC_SUPPORTED_TYPES(BlockPointerType, MemberPointerType,
-                                    PointerType, ReferenceType));
+                                    PointerType, ReferenceType,
+                                    ObjCObjectPointerType));
 
 /// Matches typedef types.
 ///
diff --git a/clang/include/clang/ASTMatchers/ASTMatchersInternal.h b/clang/include/clang/ASTMatchers/ASTMatchersInternal.h
index ab8b146453e761..2c690275dab71f 100644
--- a/clang/include/clang/ASTMatchers/ASTMatchersInternal.h
+++ b/clang/include/clang/ASTMatchers/ASTMatchersInternal.h
@@ -161,6 +161,9 @@ inline QualType getUnderlyingType(const FriendDecl &Node) {
 inline QualType getUnderlyingType(const CXXBaseSpecifier &Node) {
   return Node.getType();
 }
+inline QualType getUnderlyingType(const ObjCInterfaceDecl &Node) {
+  return Node.getTypeForDecl()->getPointeeType();
+}
 
 /// Unifies obtaining a `TypeSourceInfo` from different node types.
 template <typename T,
@@ -1113,6 +1116,12 @@ class HasDeclarationMatcher : public MatcherInterface<T> {
     return matchesDecl(Node.getDecl(), Finder, Builder);
   }
 
+  bool matchesSpecialized(const ObjCInterfaceDecl &Node,
+                          ASTMatchFinder *Finder,
+                          BoundNodesTreeBuilder *Builder) const {
+    return matchesDecl(Node.getCanonicalDecl(), Finder, Builder);
+  }
+
   /// Extracts the operator new of the new call and returns whether the
   /// inner matcher matches on it.
   bool matchesSpecialized(const CXXNewExpr &Node,
@@ -1213,7 +1222,7 @@ using HasDeclarationSupportedTypes =
              ElaboratedType, InjectedClassNameType, LabelStmt, AddrLabelExpr,
              MemberExpr, QualType, RecordType, TagType,
              TemplateSpecializationType, TemplateTypeParmType, TypedefType,
-             UnresolvedUsingType, ObjCIvarRefExpr>;
+             UnresolvedUsingType, ObjCIvarRefExpr, ObjCInterfaceDecl>;
 
 /// A Matcher that allows binding the node it matches to an id.
 ///
diff --git a/clang/lib/ASTMatchers/ASTMatchersInternal.cpp b/clang/lib/ASTMatchers/ASTMatchersInternal.cpp
index 46dd44e6f2b24f..8def98ff6dc328 100644
--- a/clang/lib/ASTMatchers/ASTMatchersInternal.cpp
+++ b/clang/lib/ASTMatchers/ASTMatchersInternal.cpp
@@ -1097,7 +1097,7 @@ AST_TYPELOC_TRAVERSE_MATCHER_DEF(hasValueType,
 AST_TYPELOC_TRAVERSE_MATCHER_DEF(
     pointee,
     AST_POLYMORPHIC_SUPPORTED_TYPES(BlockPointerType, MemberPointerType,
-                                    PointerType, ReferenceType));
+                                    PointerType, ReferenceType, ObjCObjectPointerType));
 
 const internal::VariadicDynCastAllOfMatcher<Stmt, OMPExecutableDirective>
     ompExecutableDirective;
diff --git a/clang/unittests/ASTMatchers/ASTMatchersTraversalTest.cpp b/clang/unittests/ASTMatchers/ASTMatchersTraversalTest.cpp
index 1d18869a6b8afc..adf8749a642fc3 100644
--- a/clang/unittests/ASTMatchers/ASTMatchersTraversalTest.cpp
+++ b/clang/unittests/ASTMatchers/ASTMatchersTraversalTest.cpp
@@ -283,6 +283,13 @@ TEST(HasDeclaration, HasDeclarationOfTypeAlias) {
           hasDeclaration(typeAliasTemplateDecl()))))))));
 }
 
+TEST(HasDeclaration, HasDeclarationOfObjCInterface) {
+  EXPECT_TRUE(matchesObjC(
+      "@interface BaseClass @end void f() {BaseClass* b;}",
+      varDecl(hasType(objcObjectPointerType(pointee(hasDeclaration(
+          objcInterfaceDecl())))))));
+}
+
 TEST(HasUnqualifiedDesugaredType, DesugarsUsing) {
   EXPECT_TRUE(
       matches("struct A {}; using B = A; B b;",

``````````

</details>


https://github.com/llvm/llvm-project/pull/117021