Re: Tracking buffer positions across time, without markers (was Re: PL support)

[Eli Zaretskii]

> From: Stefan Monnier <address@hidden>
> Cc: Eli Zaretskii <address@hidden>,  address@hidden,
>   João Távora
>  <address@hidden>
> Date: Sun, 10 May 2020 16:46:29 -0400
> 
> If you have the option to ask for a more up-to-date version of the data
> to be sent, you can obviously throw the data away, but even in that case
> you should be able to do better with fairly little work: use an
> after-change-function to keep track of just 2 markers that indicate the
> beginning and end of the part of the buffer that's been modified.
> Then you can easily translate all the positions before the first and
> after the second marker and only discard the data between the two.

This is all possible, of course, but I don't (yet) see why it would be
necessary.  We survive without this complexity when using JIT
font-lock, and any alternative back-end for the same job should be
able to reuse the same basic architecture.