[clang][ExtractAPI] Generate subheading for typedef'd anonymous types (#110689)

When an anonymous type has a typedef we normally use the typedef's name
in places where we expect a named identifier in the symbol graph. This
extends this logic to apply to subheadings.

rdar://136690614

1 files changed, 3 insertions, 0 deletions

diff --git a/clang/lib/ExtractAPI/DeclarationFragments.cpp b/clang/lib/ExtractAPI/DeclarationFragments.cpp
index 9cb45c8..66c0386 100644
--- a/clang/lib/ExtractAPI/DeclarationFragments.cpp
+++ b/clang/lib/ExtractAPI/DeclarationFragments.cpp
@@ -1621,6 +1621,9 @@ DeclarationFragmentsBuilder::getSubHeading(const NamedDecl *Decl) {
              cast<CXXMethodDecl>(Decl)->isOverloadedOperator()) {
     Fragments.append(Decl->getNameAsString(),
                      DeclarationFragments::FragmentKind::Identifier);
+  } else if (isa<TagDecl>(Decl) &&
+             cast<TagDecl>(Decl)->getTypedefNameForAnonDecl()) {
+    return getSubHeading(cast<TagDecl>(Decl)->getTypedefNameForAnonDecl());
   } else if (Decl->getIdentifier()) {
     Fragments.append(Decl->getName(),
                      DeclarationFragments::FragmentKind::Identifier);