Suggestion for Parsing JSON to Custom Data Structure

[lano1106]

I'm currently using the suggested pattern in the lib documentation.

What I am trying to achieve is to construct C++ objects from JSON strings. The strategy that I'm deploying is very similar to what is suggested in the lib doc.

I pass a reader and an input stream object to a class constructor and I'm parsing the JSON by passing the constructed object reference as the handler.

One difficulty that I have is that my handler class is now littered with a bunch of data members that their only purpose is for providing a parsing context. Past the object construction, they aren't needed anymore...

I was thinking of 2 solutions:

1. Have rapidjson pass a parsing context to the various handler methods... (similar to what expat offers)
2. Have a friend builder class.

I think #2 has the most potential... Maybe add this idea to the doc to help others... Here is the concept:

class A { public: A(Reader r, InputStream is) { BuilderHandler handler(*this); r.parse(is, handler); } private: class BuilderHandler { BuilderHandler(A &a) : a_(a) {} private: // bunch of context parsing variables A &a_; }; friend class BuilderHandler; };