VariantImpl: change setRawString() to return bool

Author: bblanchon

src/ArduinoJson/Variant/ConverterImpl.hpp

@@ -168,8 +168,8 @@ inline detail::enable_if_t<detail::IsString<T>::value, bool> convertToJson(
 // SerializedValue<const __FlashStringHelper*>
 template <typename T>
 struct Converter<SerializedValue<T>> : private detail::VariantAttorney {
-  static void toJson(SerializedValue<T> src, JsonVariant dst) {
-    getVariantImpl(dst).setRawString(
+  static bool toJson(SerializedValue<T> src, JsonVariant dst) {
+    return getVariantImpl(dst).setRawString(
         detail::adaptString(src.data(), src.size()));
   }
 };

src/ArduinoJson/Variant/VariantImpl.hpp

@@ -488,13 +488,15 @@ class VariantImpl {
   }
 
   template <typename TAdaptedString>
-  void setRawString(TAdaptedString value) {
+  bool setRawString(TAdaptedString value) {
     if (!data_)
-      return;
+      return false;
     clear(data_, resources_);
     auto dup = resources_->saveString(adaptString(value.data(), value.size()));
-    if (dup)
-      data_->setRawString(dup);
+    if (!dup)
+      return false;
+    data_->setRawString(dup);
+    return true;
   }
 
   template <typename TAdaptedString>