Add VariantImpl in CollectionIterator

src/ArduinoJson/Array/ArrayImpl.hpp

@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <ArduinoJson/Collection/CollectionIterator.hpp>
 #include <ArduinoJson/Variant/VariantCompare.hpp>
 #include <ArduinoJson/Variant/VariantImpl.hpp>
 
@@ -53,6 +54,12 @@ inline VariantData* VariantImpl::getElement(size_t index) const {
   return at(index).data();
 }
 
+inline void VariantImpl::removeElement(iterator it) {
+  if (!isArray())
+    return;
+  removeOne(it);
+}
+
 inline void VariantImpl::removeElement(size_t index) {
   removeElement(at(index));
 }

src/ArduinoJson/Array/JsonArrayIterator.hpp

@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <ArduinoJson/Collection/CollectionIterator.hpp>
 #include <ArduinoJson/Variant/JsonVariant.hpp>
 
 ARDUINOJSON_BEGIN_PUBLIC_NAMESPACE

src/ArduinoJson/Collection/CollectionImpl.hpp

@@ -4,7 +4,6 @@
 
 #pragma once
 
-#include <ArduinoJson/Collection/CollectionIterator.hpp>
 #include <ArduinoJson/Memory/Alignment.hpp>
 #include <ArduinoJson/Strings/StringAdapters.hpp>
 #include <ArduinoJson/Variant/VariantCompare.hpp>
@@ -12,18 +11,6 @@
 
 ARDUINOJSON_BEGIN_PRIVATE_NAMESPACE
 
-inline void CollectionIterator::next() {
-  ARDUINOJSON_ASSERT(slot_);
-  auto nextId = slot_->next;
-  slot_ = resources_->getVariant(nextId);
-  currentId_ = nextId;
-}
-
-inline VariantImpl CollectionIterator::value() const {
-  ARDUINOJSON_ASSERT(slot_ != nullptr);
-  return VariantImpl(slot_, resources_);
-}
-
 inline VariantImpl::iterator VariantImpl::createIterator() const {
   if (!data_ || !data_->isCollection())
     return iterator();
@@ -78,7 +65,7 @@ inline void VariantImpl::removeOne(iterator it) {
   if (it.done())
     return;
   auto coll = getCollectionData();
-  auto curr = it.slot_;
+  auto curr = it.data();
   auto prev = getPreviousSlot(curr);
   auto next = curr->next;
   if (prev)
@@ -87,14 +74,14 @@ inline void VariantImpl::removeOne(iterator it) {
     coll->head = next;
   if (next == NULL_SLOT)
     coll->tail = prev.id();
-  freeVariant({it.slot_, it.currentId_});
+  freeVariant({it.data(), it.currentId_});
 }
 
 inline void VariantImpl::removePair(VariantImpl::iterator it) {
   if (it.done())
     return;
 
-  auto keySlot = it.slot_;
+  auto keySlot = it.data();
 
   auto valueId = keySlot->next;
   auto valueSlot = getVariant(valueId);
@@ -119,4 +106,19 @@ inline size_t VariantImpl::nesting() const {
   return maxChildNesting + 1;
 }
 
+inline size_t VariantImpl::size() const {
+  if (!data_)
+    return 0;
+
+  size_t count = 0;
+
+  for (auto it = createIterator(); !it.done(); it.next())
+    count++;
+
+  if (data_->type == VariantType::Object)
+    count /= 2;  // TODO: do this in JsonObject?
+
+  return count;
+}
+
 ARDUINOJSON_END_PRIVATE_NAMESPACE

src/ArduinoJson/Collection/CollectionIterator.hpp

@@ -6,6 +6,7 @@
 
 #include <ArduinoJson/Namespace.hpp>
 #include <ArduinoJson/Polyfills/assert.hpp>
+#include <ArduinoJson/Variant/VariantImpl.hpp>
 
 #include <stddef.h>  // size_t
 
@@ -21,39 +22,44 @@ class CollectionIterator {
  public:
   CollectionIterator() {}
 
-  void next();
+  void next() {
+    ARDUINOJSON_ASSERT(!done());
+    auto nextId = value_.getData()->next;
+    auto resources = value_.getResourceManager();
+    value_ = VariantImpl(resources->getVariant(nextId), resources);
+    currentId_ = nextId;
+  }
 
-  VariantImpl value() const;
+  const VariantImpl& value() const {
+    return value_;
+  }
 
   bool done() const {
-    return slot_ == nullptr;
+    return value_.isUnbound();
   }
 
   bool operator==(const CollectionIterator& other) const {
-    return slot_ == other.slot_;
+    return data() == other.data();
   }
 
   bool operator!=(const CollectionIterator& other) const {
-    return slot_ != other.slot_;
+    return !operator==(other);
   }
 
   VariantData* data() {
-    return slot_;
+    return value_.getData();
   }
 
   const VariantData* data() const {
-    return slot_;
+    return value_.getData();
   }
 
  private:
   CollectionIterator(SlotId slotId, ResourceManager* resources)
-      : slot_(resources->getVariant(slotId)),
-        currentId_(slotId),
-        resources_(resources) {}
+      : value_(resources->getVariant(slotId), resources), currentId_(slotId) {}
 
-  VariantData* slot_ = nullptr;
+  VariantImpl value_;
   SlotId currentId_ = NULL_SLOT;
-  ResourceManager* resources_ = nullptr;
 };
 
 ARDUINOJSON_END_PRIVATE_NAMESPACE

src/ArduinoJson/Object/ObjectImpl.hpp

@@ -46,6 +46,10 @@ inline void VariantImpl::removeMember(TAdaptedString key) {
   removeMember(findKey(key));
 }
 
+inline void VariantImpl::removeMember(iterator it) {
+  removePair(it);
+}
+
 template <typename TAdaptedString>
 inline VariantData* VariantImpl::addMember(TAdaptedString key) {
   if (!isObject())

src/ArduinoJson/Variant/VariantImpl.hpp

@@ -4,7 +4,6 @@
 
 #pragma once
 
-#include <ArduinoJson/Collection/CollectionIterator.hpp>
 #include <ArduinoJson/Memory/ResourceManager.hpp>
 #include <ArduinoJson/Misc/SerializedValue.hpp>
 #include <ArduinoJson/Numbers/convertNumber.hpp>
@@ -14,6 +13,8 @@
 
 ARDUINOJSON_BEGIN_PRIVATE_NAMESPACE
 
+class CollectionIterator;
+
 class VariantImpl {
   VariantData* data_;
   ResourceManager* resources_;
@@ -35,7 +36,7 @@ class VariantImpl {
   }
 
   template <typename TVisitor>
-  typename TVisitor::result_type accept(TVisitor& visit) {
+  typename TVisitor::result_type accept(TVisitor& visit) const {
     if (!data_)
       return visit.visit(nullptr);
 
@@ -337,20 +338,14 @@ class VariantImpl {
 
   size_t nesting() const;
 
-  void removeElement(iterator it) {
-    if (!isArray())
-      return;
-    removeOne(it);
-  }
+  void removeElement(iterator it);
 
   void removeElement(size_t index);
 
   template <typename TAdaptedString>
   void removeMember(TAdaptedString key);
 
-  void removeMember(iterator it) {
-    removePair(it);
-  }
+  void removeMember(iterator it);
 
   bool setBoolean(bool value) {
     if (!data_)
@@ -455,20 +450,7 @@ class VariantImpl {
 
   void empty();
 
-  size_t size() const {
-    if (!data_)
-      return 0;
-
-    size_t count = 0;
-
-    for (auto it = createIterator(); !it.done(); it.next())
-      count++;
-
-    if (data_->type == VariantType::Object)
-      count /= 2;  // TODO: do this in JsonObject?
-
-    return count;
-  }
+  size_t size() const;
 
   VariantType type() const {
     return data_ ? data_->type : VariantType::Null;