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bug#52496: syntax highlighting problem on emacs shell-script mode
From: |
Kévin Le Gouguec |
Subject: |
bug#52496: syntax highlighting problem on emacs shell-script mode |
Date: |
Sun, 19 Dec 2021 16:46:56 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) |
Andreas Schwab <schwab@linux-m68k.org> writes:
> On Dez 19 2021, Lars Ingebrigtsen wrote:
>
>> Andreas Schwab <schwab@linux-m68k.org> writes:
>>
>>> On Dez 19 2021, Lars Ingebrigtsen wrote:
>>>
>>>> Right. I haven't real the shell documentation -- is "@" a valid heredoc
>>>> ... separator?
>>>
>>> Any word is.
>>
>> But is @ word constituent?
>
> A shell word can be almost anything.
Relevant part of (bash) Redirections:
> The format of here-documents is:
> [N]<<[-]WORD
> HERE-DOCUMENT
> DELIMITER
>
> No parameter and variable expansion, command substitution, arithmetic
> expansion, or filename expansion is performed on WORD. If any part of
> WORD is quoted, the DELIMITER is the result of quote removal on WORD,
And (bash) Definitions:
> 'word'
> A sequence of characters treated as a unit by the shell. Words may
> not include unquoted 'metacharacters'.
Preceded by:
> 'metacharacter'
> A character that, when unquoted, separates words. A metacharacter
> is a 'space', 'tab', 'newline', or one of the following characters:
> '|', '&', ';', '(', ')', '<', or '>'.
(AFAICT the same goes for POSIX sh[1])
So IIUC for here-documents anything is fair game except (1)
{single,double,back} quotes (2) metacharacters (3) backslashes and
comment openers (#); all of which can still be used if quoted or escaped
*on the opening line only*.
[1]
https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_07_04
- bug#52496: syntax highlighting problem on emacs shell-script mode, Yilkal Argaw, 2021/12/14
- bug#52496: syntax highlighting problem on emacs shell-script mode, Lars Ingebrigtsen, 2021/12/19
- bug#52496: syntax highlighting problem on emacs shell-script mode, Andreas Schwab, 2021/12/19
- bug#52496: syntax highlighting problem on emacs shell-script mode, Lars Ingebrigtsen, 2021/12/19
- bug#52496: syntax highlighting problem on emacs shell-script mode, Andreas Schwab, 2021/12/19
- bug#52496: syntax highlighting problem on emacs shell-script mode, Lars Ingebrigtsen, 2021/12/19
- bug#52496: syntax highlighting problem on emacs shell-script mode, Andreas Schwab, 2021/12/19
- bug#52496: syntax highlighting problem on emacs shell-script mode,
Kévin Le Gouguec <=
- bug#52496: syntax highlighting problem on emacs shell-script mode, Lars Ingebrigtsen, 2021/12/20
- bug#52496: syntax highlighting problem on emacs shell-script mode, Yilkal Argaw, 2021/12/20
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