Re: [PATCH 11/19] rust/qobject: add from/to JSON bindings for QObject

[Paolo Bonzini <pbonzini@redhat.com>]

On 12/8/25 10:17, Markus Armbruster wrote:
> Paolo Bonzini <pbonzini@redhat.com> writes:
> 
>> Il ven 5 dic 2025, 13:16 Markus Armbruster <armbru@redhat.com> ha scritto:
>>
>>>> Note however that there is no support for push parsing, therefore this
>>>> would not replace the balanced-parentheses machinery in
>>>> qobject/json-streamer.c, and therefore QMP would still need a minimal
>>>> lexer.
>>>
>>> That push parser...  I never liked it.  First, it's half-assed: it's a
>>> push lexer wed to a pull parser with parenthesis counting.  Second, why
>>> complicated & half-assed when you can do simple & quarter-assed instead?
>>> We could've required "exactly one complete JSON value per line", or some
>>> expression separator such as an empty line.
>>
>> Hmm not sure I agree, actually I think I disagree. It seems simpler but it
>> is also different.
> 
> Management applications would be just fine with the different interface.
> 
> Human users would be better off.  As is, a missing right parenthesis is
> met with silence.  You can then input whatever you want, and get more
> silence until you somehow close the last parenthesis.  Quite confusing
> unless you already know.
Not being able to add line breaks to a long JSON command (preparing it 
in an editor and pasting it into either a "-qmp stdio" terminal or 
socat/nc) would be a dealbreaker for me.

JSON says whitespace is irrelevant.  "This standard format but..." is a 
bad idea that requires extraordinary justification.  Not that it matters 
now 15 years down the line. :)

Paolo