Re: New JSON library from the maker of Beast!

From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2019-09-24 09:29:19

On Sun, 22 Sep 2019 at 19:05, Vinnie Falco via Boost
<boost_at_[hidden]> wrote:
>
> I've been working on a massively-multiplayer online blackjack casino
> server, called Beast Lounge [1]. The server and client communicate
> using JSON-RPC over WebSocket. I have developed a brand-new JSON
> library for this project, in accordance with the following design
> goals:
>
> * Robust support for custom allocators throughout.
> * Array and object interfaces closely track their corresponding C++20
> container equivalents.
> * Use `std::basic_string` for strings.
> * Minimize use of templates for reduced compilation times.
> * Parsers and serializers work incrementally (['online algorithms]).
> * Elements in objects may also be iterated in insertion order.
>
> You can see the JSON library in development here:
>
> https://github.com/vinniefalco/json

Features that matter to me:
- no allocation, ever
- parsing/generating data incrementally from/into segmented buffers
without copying
- full arbitrary-precision decimal support without imposing a decimal
representation on me
- not imposing any string or blob type
- fast conversion between numbers and text, with correct shortest
representation for floating-point

Unfortunately your library does not satisfy all of those criteria, so
it is not very useful to me.
Main problem appears to be that the parser is hardcoded to convert the
values into a specific type.

In practice I use JSON as a self-describing
serialization/deserialization system in text form, which also happens
to work well as a representation to transmit data across systems and
languages.
I do not want to convert a stream of JSON bytes into a
boost::json::value type, which might already be a lossy conversion, I
want to convert it directly to my type.