Re: [Flex-devel] Push-lexer

[Mighty Jo <mig...@gm...>]

Understood. Sounds like you have a better handle on it than I do!

-Joe

On Sat, Feb 6, 2021, 11:04 Jerome Hamm <jer...@gm...> wrote:

> Hi Joe,
>
> Thank you for your answer.
> I might have missed something, but I didn't find any code that yields,
> even with a reentrant lexer. bison returns YYPUSH_MORE. But for the lexer
> interactive mode uses getc and processes the buffer as soon as it detects a
> '\n', whereas non-interactive reads blocks. So if I'm not mistaken
> interactive mode blocks on getc and does not yield.
>
> Cheers,
> Jérôme.
>
> On Sat, Feb 6, 2021 at 3:29 PM Mighty Jo <mig...@gm...> wrote:
>
>> Hi, Jérôme!
>>
>> I'm not a maintainer, but they are pretty cool about considering pull
>> requests. Add tests for any new functionality and be sure your fork passes
>> 'make distcheck' when your tree has been cleaned with 'git clean -xdf'.
>>
>> If I may ask a silly question: Have you looked at the "interactive"
>> scanner option? It's meant for reading from character devices. The
>> differences are mostly invisible to the caller of yylex().
>>
>> I don't remember whether the interactive scanner yields or blocks when
>> the input device is empty.
>>
>> Cheers!
>> Joe
>>
>> On Sat, Feb 6, 2021, 08:12 Jerome Hamm <jer...@gm...> wrote:
>>
>>> Hi,
>>>
>>> I am working on the ability to push data byte by byte (or more, but not
>>> necessarily aligned to tokens or complete lines) to flex, so platforms
>>> which don't have threads, like micro controllers can also benefit from it,
>>> in a "cooperative-multitasking" spirit.
>>>
>>> What is the policy about adding new functionality to flex, would this be
>>> something that could be integrated?
>>>
>>> Cheer,
>>> Jérôme.
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>