[clang][ASTMatcher] fix hasAnyBase not binding submatchers (#67939)

The BoundNodesTreeBuilder used in the BaseSpecMatcher was the original
and was reset to its original state if a match occurred.
The matcher now uses the local copy in the inner matcher.

Fixes #65421

Author: 5chmidti

clang/docs/ReleaseNotes.rst

@@ -521,6 +521,8 @@ Bug Fixes to AST Handling
   computed RecordLayout is incorrect if fields are not completely imported and
   should not be cached.
   `Issue 64170 <https://github.com/llvm/llvm-project/issues/64170>`_
+- Fixed ``hasAnyBase`` not binding nodes in its submatcher.
+  (`#65421 <https://github.com/llvm/llvm-project/issues/65421>`_)
 
 Miscellaneous Bug Fixes
 ^^^^^^^^^^^^^^^^^^^^^^^

clang/lib/ASTMatchers/ASTMatchersInternal.cpp

@@ -87,7 +87,7 @@ bool matchesAnyBase(const CXXRecordDecl &Node,
       [Finder, Builder, &BaseSpecMatcher](const CXXBaseSpecifier *BaseSpec,
                                           CXXBasePath &IgnoredParam) {
         BoundNodesTreeBuilder Result(*Builder);
-        if (BaseSpecMatcher.matches(*BaseSpec, Finder, Builder)) {
+        if (BaseSpecMatcher.matches(*BaseSpec, Finder, &Result)) {
           *Builder = std::move(Result);
           return true;
         }

clang/unittests/ASTMatchers/ASTMatchersTraversalTest.cpp

@@ -8,6 +8,7 @@
 
 #include "ASTMatchersTest.h"
 #include "clang/AST/Attrs.inc"
+#include "clang/AST/DeclCXX.h"
 #include "clang/AST/PrettyPrinter.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "clang/ASTMatchers/ASTMatchers.h"
@@ -5457,6 +5458,18 @@ TEST(HasParent, NoDuplicateParents) {
     stmt().bind("node"), std::make_unique<HasDuplicateParents>()));
 }
 
+TEST(HasAnyBase, BindsInnerBoundNodes) {
+  EXPECT_TRUE(matchAndVerifyResultTrue(
+      "struct Inner {}; struct Proxy : Inner {}; struct Main : public "
+      "Proxy {};",
+      cxxRecordDecl(hasName("Main"),
+                    hasAnyBase(cxxBaseSpecifier(hasType(
+                        cxxRecordDecl(hasName("Inner")).bind("base-class")))))
+          .bind("class"),
+      std::make_unique<VerifyIdIsBoundTo<CXXRecordDecl>>("base-class",
+                                                         "Inner")));
+}
+
 TEST(TypeMatching, PointeeTypes) {
   EXPECT_TRUE(matches("int b; int &a = b;",
                       referenceType(pointee(builtinType()))));