Change StringBuilder::save() to take a VariantData*

src/ArduinoJson/Json/JsonDeserializer.hpp

@@ -279,7 +279,7 @@ class JsonDeserializer {
           if (!keyVariant)
             return DeserializationError::NoMemory;
 
-          keyVariant->setOwnedString(stringBuilder_.save());
+          stringBuilder_.save(keyVariant);
         } else {
           member->clear(resources_);
         }
@@ -388,7 +388,7 @@ class JsonDeserializer {
     if (err)
       return err;
 
-    variant.setOwnedString(stringBuilder_.save());
+    stringBuilder_.save(&variant);
 
     return DeserializationError::Ok;
   }

src/ArduinoJson/Memory/StringBuilder.hpp

@@ -25,7 +25,8 @@ class StringBuilder {
       node_ = resources_->createString(initialCapacity);
   }
 
-  StringNode* save() {
+  void save(VariantData* variant) {
+    ARDUINOJSON_ASSERT(variant != nullptr);
     ARDUINOJSON_ASSERT(node_ != nullptr);
     node_->data[size_] = 0;
     StringNode* node = resources_->getString(adaptString(node_->data, size_));
@@ -37,7 +38,7 @@ class StringBuilder {
     } else {
       node->references++;
     }
-    return node;
+    variant->setOwnedString(node);
   }
 
   void append(const char* s) {

src/ArduinoJson/Variant/ConverterImpl.hpp

@@ -230,9 +230,9 @@ class StringBuilderPrint : public Print {
     copier_.startString();
   }
 
-  StringNode* save() {
+  void save(VariantData* data) {
     ARDUINOJSON_ASSERT(!overflowed());
-    return copier_.save();
+    copier_.save(data);
   }
 
   size_t write(uint8_t c) {
@@ -268,7 +268,7 @@ inline void convertToJson(const ::Printable& src, JsonVariant dst) {
   src.printTo(print);
   if (print.overflowed())
     return;
-  data->setOwnedString(print.save());
+  print.save(data);
 }
 
 #endif