[clang-tools-extra] [clang-doc] Do not serialize empty text comments (PR #169087)

[Paul Kirth via cfe-commits]

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@@ -98,10 +114,29 @@ static void insertComment(Object &Description, json::Value &Comment,
   }
 }
 
+/// Takes the nested "Children" array from a comment Object.
+///
+/// \return a json::Array of comments, possible json::Value::Kind::Null
 static json::Value extractTextComments(Object *ParagraphComment) {
   if (!ParagraphComment)
-    return json::Object();
-  return *ParagraphComment->get("Children");
+    return json::Value(nullptr);
+  json::Value *Children = ParagraphComment->get("Children");
+  if (!Children)
+    return json::Value(nullptr);
+  auto ChildrenArray = *Children->getAsArray();
+  auto ChildrenIt = ChildrenArray.begin();
+  while (ChildrenIt != ChildrenArray.end()) {
+    auto *ChildObj = ChildrenIt->getAsObject();
+    if (!ChildObj)
+      break;
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ilovepi wrote:

you just return on the first one that isn't an object?

https://github.com/llvm/llvm-project/pull/169087