Re: Channel commands: special characters, quotes and escaping

Jan Bundesmann wrote:

> I'm currently playing around with the new channel support and came
> across something I do not fully understand. Playing around with the
> demoserver.py I tried to send a command to my vim-instance via
> feedkeys. The original command was:
>
> :call feedkeys("ggOHello, world!\e")
>
> >From within vim this works. I tried to enter it in the server stdin as:
>
> ["ex", "..."]
>
> and had to fight with the nested quotes. The special character "\e" is only accepted within double-quotes. So I tried to include the whole call-command in single quotes which is not accepted by the default handler leaving me with
>
> ["ex", 'call feedkeys("ggOHello, world!\e")']
> > Decoding failed - discarding input
>
> in the ch_log. A working version is
>
> ["ex", "call feedkeys(\"ggOHello, world!\\e\")"]
>
> with a lot of escapes. I do not understand why the first solution does
> not work.

Keep in mind this is in Python. And in Python a backslash inside a
single quoted string has a special meaning, unlike Vim.

I think this should also work:

["ex", 'call feedkeys("ggOHello, world!\\e")']

The text inside single quotes is a Python string, where the actual
resulting text is:
call feedkeys("ggOHello, world!\e")

And then Vim will interpret the \e in double quotes as an escape.


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