Re: Vim 8 pre-announcement

2016-08-18 0:17 GMT+03:00 Bram Moolenaar <Bram@moolenaar.net>:
>
> Skywind3000 wrote:
>
>> > Hello Vim users,
>> >
>> > Work on Vim 8.0 is coming close to an end. I hope version 8.0 can be
>> > released in about two weeks.
>> >
>> > This is a last chance to modify new features in a way that is not
>> > backwards compatible. Once 8.0 is out we can't make changes that would
>> > break plugins.
>>
>> Can we have a binary mode in channels ? Which could be used to implement
>> a virtual terminal inside vim in VimScript.
>>
>> According to the ":help channel", There is a "raw" mode in channels, but it
>> will treat the whole message as a string, not a binary data.
>
> Raw mode is nearly binary. The only limitation I'm aware of is that it
> can't handle NUL bytes. And since there is no way to deal with binary
> data anyway in Vim script, it's probably the only thing possible.

Neovim handled this just fine from the very beginning: just callback
receives not a string, but a `readfile(,'b')`-style list. Though it
led to some confusion (line `"abc\n"` may be received as `['abc', '']`
or `['ab']` and `['c', '']`, but some plugin authors thought that
Neovim is waiting for line to finish, so `'ab'` in the second example
is the whole line), this is the only normal way to represent binary
data in VimL. Another variant is a list like `[0x61, 0x62, 0x63,
0x0A]` which has very high overhead.

>
> An alternative is NL mode, then you get lines at a time where NUL bytes
> have been changed to NL bytes. But it will be stuck waiting for the
> next NL.
>
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>
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