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Re: Block comments ala Ray
- X-seq: zsh-workers 48018
- From: Stephane Chazelas <stephane@xxxxxxxxxxxx>
- To: Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>
- Cc: Zsh hackers list <zsh-workers@xxxxxxx>
- Subject: Re: Block comments ala Ray
- Date: Fri, 12 Feb 2021 15:45:47 +0000
- Archived-at: <https://zsh.org/workers/48018>
- Archived-at: <http://www.zsh.org/sympa/arcsearch_id/zsh-workers/2021-02/20210212154547.iy35rp4ijaef22ld%40chazelas.org>
- In-reply-to: <CAH+w=7ZT3vgGVd_NAndnDt2zbLwGV3Pwu=7+utEuwvSkKd4jOA@mail.gmail.com>
- List-id: <zsh-workers.zsh.org>
- Mail-followup-to: Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>, Zsh hackers list <zsh-workers@xxxxxxx>
- References: <CAH+w=7YZREq7FbJCCoWoJ-vQ7+P5Z=_mKB-aStoMiBRupqD_wA@mail.gmail.com> <CAN=4vMonpZHPSarsC778_GMbD_h4ioTwT+bTFU=FZ7_zbXaMqQ@mail.gmail.com> <CAH+w=7Zd2gY-s5T1dDNEEujAh6197MzrUD-iZrVwZLzD=L7xVQ@mail.gmail.com> <CAN=4vMoYj3WbBk3BL98buiYcf7rkLtw=b9v_f0p1C4zqYRB7xg@mail.gmail.com> <20210212074031.7746vg37xykniem5@chazelas.org> <CAH+w=7ZT3vgGVd_NAndnDt2zbLwGV3Pwu=7+utEuwvSkKd4jOA@mail.gmail.com>
2021-02-12 07:30:23 -0800, Bart Schaefer:
> On Thu, Feb 11, 2021 at 11:40 PM Stephane Chazelas
> <stephane@xxxxxxxxxxxx> wrote:
> >
> > :||:<<'# some comment'
>
> That's exactly what the zsh-users discussion has been telling Ray he
> should not do, because at some point it's not going to work the way he
> expects.
[...]
How so?
That construct is pretty idiomatic.
Note:
- the :|| to prevent the temp file containing the here-doc from
even being created and
- the *quoted* delimiter (here "# some comment") to prevent
expansions being performed inside the here-doc
That can even be aliased:
alias START_COMMENT=':||:<<"END_COMMENT"'
How would it be different from your !# .. #! ?
--
Stephane
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