[clang] [clang][ExtractAPI] Add ability to create multiple symbol graphs (PR #86676)

[Daniel Grumberg via cfe-commits]

================
@@ -54,63 +55,21 @@ struct LibClangExtractAPIVisitor
     if (!shouldDeclBeIncluded(Decl))
       return true;
 
-    const ObjCInterfaceDecl *Interface = Decl->getClassInterface();
-    StringRef Name = Interface->getName();
-    StringRef USR = API.recordUSR(Decl);
-    PresumedLoc Loc =
-        Context.getSourceManager().getPresumedLoc(Decl->getLocation());
-    LinkageInfo Linkage = Decl->getLinkageAndVisibility();
-    DocComment Comment;
-    if (auto *RawComment = fetchRawCommentForDecl(Interface))
-      Comment = RawComment->getFormattedLines(Context.getSourceManager(),
-                                              Context.getDiagnostics());
-
-    // Build declaration fragments and sub-heading by generating them for the
-    // interface.
-    DeclarationFragments Declaration =
-        DeclarationFragmentsBuilder::getFragmentsForObjCInterface(Interface);
-    DeclarationFragments SubHeading =
-        DeclarationFragmentsBuilder::getSubHeading(Decl);
-
-    // Collect super class information.
-    SymbolReference SuperClass;
-    if (const auto *SuperClassDecl = Decl->getSuperClass()) {
-      SuperClass.Name = SuperClassDecl->getObjCRuntimeNameAsString();
-      SuperClass.USR = API.recordUSR(SuperClassDecl);
-    }
-
-    ObjCInterfaceRecord *ObjCInterfaceRecord = API.addObjCInterface(
-        Name, USR, Loc, AvailabilityInfo::createFromDecl(Decl), Linkage,
-        Comment, Declaration, SubHeading, SuperClass, isInSystemHeader(Decl));
-
-    // Record all methods (selectors). This doesn't include automatically
-    // synthesized property methods.
-    recordObjCMethods(ObjCInterfaceRecord, Decl->methods());
-    recordObjCProperties(ObjCInterfaceRecord, Decl->properties());
-    recordObjCInstanceVariables(ObjCInterfaceRecord, Decl->ivars());
-
-    return true;
+    return VisitObjCInterfaceDecl(Decl->getClassInterface());
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daniel-grumberg wrote:

Restore logic to grab symbols defined only in the implementation. First visit the interface and then add the things only defined in the implementation block to the interface record.

https://github.com/llvm/llvm-project/pull/86676