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Re: [Bug-readline] vi-mode: fix relationship of `.' to f/F/t/T
From: |
Chet Ramey |
Subject: |
Re: [Bug-readline] vi-mode: fix relationship of `.' to f/F/t/T |
Date: |
Mon, 1 Oct 2018 09:38:57 -0400 |
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Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 |
On 9/29/18 8:09 PM, Richard Todd wrote:
> Hi all,
>
> I believe this is a vi-mode POSIX issue, this time:
>
> Let's take the following line:
>
> 'ball' 'animal' 'angle'
>
> With the cursor at the front, in vim's compatibility mode, I can issue the
> following commands (with spaces added only for clarity here):
>
> fb dt' fa . ; .
>
> ... and I will be left with three sets of quotes:
>
> '' '' ''
>
> This sequence illustrates two features not present in readline's vi-mode:
This is another excellent candidate for an extended vi editing mode. These
features are not present in the description of the shell's command line
editing.
>
> 1) Since the `fa' command will overwrite _rl_vi_last_search_char, the
> following `.'
> command doesn't remember it should delete up to a single-quote.
>
> The POSIX section for "[count] ." states: "Repeated commands with
> associated
> motion commands shall repeat the motion command as well". The dot should
> repeat dt' regardless of any intervening t/T/f/F commands.
The shell command line editing description says only:
"Repeat the most recent non-motion command, even if it was executed on an
earlier command line."
The rest of the description concerns how the command treats [count].
>
> 2) Since the `.' command overwrites _rl_cs_dir to FTO, the next `;' command
> has forgotten that it is repeating a FFIND command (fa).
>
> The POSIX section for "[count] ." states: "If the motion component of
> the
> repeated command is f, F, t, or T, the repeated command shall not set the
> remembered search character for the ; and , commands."
The shell description says:
"Repeat the most recent f, F, t, or T command."
with no mention of the remembered search character.
> (I'm using http://pubs.opengroup.org/onlinepubs/9699919799/utilities/vi.html
> as
> my reference)
I use the shell command line editing description in
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/sh.html#tag_20_117_13_03
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU address@hidden http://tiswww.cwru.edu/~chet/
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