[Development] RFC: unified data model API in QtCore => thin wrapper proposal

[Tor Arne Vestbø]

> On 15 Jun 2018, at 13:31, Arnaud Clère <arnaud.clere at minmaxmedical.com> wrote:
> 
[snip]

> Most user-defined bind methods would be very simple and the type system would 
> guarantee that data is well-formed (no sequence or record left open...):
> 
>    struct Person {
>        QString m_firstName, m_lastName;
>        int m_age;
> 
>        template<TResult>
>        TResult bind(Val<TResult> value) { return value
>            .record()
>                .sequence("name")
>                    .bind(m_firstName)
>                    .bind(m_lastName)
>                .out()
>                .bind("age" , m_age); // automagically closes opened record
>        }
>    };

Not commenting on this API, but I’d like to note that the API I brought up as “missing” from my use-case was a more “light weight” in-place edit API, where the user does not have to define bindings to data structures like above. Similar to e.g. python:

>>> data = json.loads('{ "foo": [1, 2, 3] }')
>>> data
{u'foo': [1, 2, 3]}
>>> data["foo"][0] = 42
>>> data
{u'foo': [42, 2, 3]}

With our existing APIs I’d expect:

QJsonDocument doc;
doc[“foo”][0] = 42;

Tor Arne