[fpc-pascal] JSON register new data types for custom output/input

[Michael Van Canneyt]

On Tue, 17 May 2016, Graeme Geldenhuys wrote:

> Hi,
>
> Is it possible (or on some wish list) to register new data types with
> fpjson so it can understand and generate custom output, and understand
> reading back that custom output.

There cannot be custom output in JSON, then it would no longer be JSON. 
JSON is a fixed defined format; it does not allow "deviation".

What you probably need is what RTTIJSON does, or the restbase class.
Alternatively WST also has a serializer that outputs JSON.

But they all have 1 thing in common: they take an object instance,
and serialize this to JSON or vice versa. Custom types must be coerced into
one of the types that JSON understands.

Michael.