Re: [review] [json] My JSON review

From: Richard Hodges (hodges.r_at_[hidden])
Date: 2020-09-21 17:38:02

On Mon, 21 Sep 2020 at 19:30, Mathias Gaunard via Boost <
boost_at_[hidden]> wrote:

> On Mon, 21 Sep 2020 at 17:49, Vinnie Falco <vinnie.falco_at_[hidden]> wrote:
>
>
>
> > This looks very much like it depends on the order of appearance of
>
> > keys in the JSON, which is non-standard.
>
>
>
> You'd parse the object until you reach the desired key, building an
>
> index of where the various keys you meet on the way are (with possibly
>
> extra information of where the associated value starts/end etc.), then
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> for the next one either it's in the index so you can use it then
>
> discard it, or it's ahead, so you can continue with the same
>
> algorithm.
>
> That would be optimized for keys being ordered as expected, ignoring
>
> extra keys, while still supporting out-of-order keys (albeit with some
>
> extra storage requirements that grows with your nesting level).
>
>
>
> >
>
> > > In both cases, I'd like to read/write my data from/to JSON with the
>
> > > same framework.
>
> >
>
> > Why? What specifically, is the requirement here?
>
>
>
> What I'd like is a way to describe how my C++ types map to a key-value
>
> structure with normalized types so that I can easily convert my
>
> objects back and forth through a structured self-describing and
>
> human-readable interchange format.
>
> Ideally I'd like to do so without repeating myself with all kinds of
>
> converters, serializers, etc. and reasonably efficiently, which is why
>
> I'd like these things to be reasonably unified.
>
>
A custom handler for basic_parser ought to be able to do this, coupled with
a simple way of describing reflection in terms of element name and
reference to value (or get/set functions).

>
> Boost.Serialization doesn't do this, since it takes the approach of
>
> designing a data format to serialize any C++ structure, rather than
>
> mapping a C++ structure to a simpler text-based structure.
>
>
>
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Richard Hodges
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