Add to_json and from_json script functions

src/util/io/writer.hpp

@@ -25,8 +25,9 @@ DECLARE_POINTER_TYPE(StyleSheet);
 class Writer {
 public:
   /// Construct a writer that writes to the given output stream
+  Writer(OutputStream& output);
   Writer(OutputStream& output, Version file_app_version);
-  
+
   /// Tell the reflection code we are not reading
   static constexpr bool isReading = false;
   static constexpr bool isWriting = true;
@@ -72,11 +73,11 @@ public:
   // special behaviour
   void handle(const GameP&);
   void handle(const StyleSheetP&);
-  
-private:
-  // --------------------------------------------------- : Data
+  
   /// Indentation of the current block
   int indentation;
+private:
+  // --------------------------------------------------- : Data
   /// Blocks opened to which nothing has been written
   vector<const Char*> pending_opened;