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

[Erick Velez 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;
----------------
evelez7 wrote:

Since we're only expecting Objects, I thought it would be better to exit early since something must be wrong. But it's functionally the same to just continue in this loop. so I'll change it to continue.

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