RFC: std.json sucessor

[Christian Manning via Digitalmars-d]

It would be nice to have integers treated separately to doubles. 
I know it makes the number parsing simpler to just treat 
everything as double, but still, it could be annoying when you 
expect an integer type.

I'd also like to see some benchmarks, particularly against some 
of the high performance C++ parsers, i.e. rapidjson, gason, 
sajson. Or even some of the "not bad" performance parsers with 
better APIs, i.e. QJsonDocument, jsoncpp and jsoncons (slow but 
perhaps comparable interface to this proposal?).