Add VariantData::nesting()

src/ArduinoJson/Document/JsonDocument.hpp

@@ -157,7 +157,7 @@ class JsonDocument : public detail::VariantOperators<const JsonDocument&> {
   // Returns the depth (nesting level) of the array.
   // https://arduinojson.org/v6/api/jsondocument/nesting/
   size_t nesting() const {
-    return variantNesting(&data_);
+    return data_.nesting();
   }
 
   // Returns the number of elements in the root array or object.

src/ArduinoJson/Variant/VariantData.hpp

@@ -256,6 +256,20 @@ class VariantData {
       content_.asCollection.movePointers(variantDistance);
   }
 
+  size_t nesting() const {
+    auto collection = asCollection();
+    if (!collection)
+      return 0;
+
+    size_t maxChildNesting = 0;
+    for (const VariantSlot* s = collection->head(); s; s = s->next()) {
+      size_t childNesting = s->data()->nesting();
+      if (childNesting > maxChildNesting)
+        maxChildNesting = childNesting;
+    }
+    return maxChildNesting + 1;
+  }
+
   void operator=(const VariantData& src) {
     content_ = src.content_;
     flags_ = uint8_t((flags_ & OWNED_KEY_BIT) | (src.flags_ & ~OWNED_KEY_BIT));

src/ArduinoJson/Variant/VariantFunctions.hpp

@@ -190,18 +190,7 @@ inline bool variantIsNull(const VariantData* var) {
 inline size_t variantNesting(const VariantData* var) {
   if (!var)
     return 0;
-
-  const CollectionData* collection = var->asCollection();
-  if (!collection)
-    return 0;
-
-  size_t maxChildNesting = 0;
-  for (const VariantSlot* s = collection->head(); s; s = s->next()) {
-    size_t childNesting = variantNesting(s->data());
-    if (childNesting > maxChildNesting)
-      maxChildNesting = childNesting;
-  }
-  return maxChildNesting + 1;
+  return var->nesting();
 }
 
 ARDUINOJSON_END_PRIVATE_NAMESPACE