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From: William Park <opengeometry@yahoo.ca>
To: Zsh Users <zsh-users@zsh.org>
Subject: (question) C struct-like template to read positional arguments?
Date: Sun, 17 Jan 2021 20:52:52 -0500	[thread overview]
Message-ID: <20210118015252.GA3550@node1.localdomain> (raw)
In-Reply-To: <20210118015252.GA3550.ref@node1.localdomain>

Hi all,

I have question...

In C struct like,
    struct {
	char aa[32], bb[32], skip[128], cc[7], dd[32], ...;
    }
you just access variables, and compiler will do the offsetting.

Can zsh do something similar?

That is, you could probably build the template like
    template=(
	aa 32
	bb 32
	skip 128
	cc 7
	dd 32
	...
    )
and read into them, then just use variables, without worrying about
offsets.  So, ${cc[@]} would be equivalent to ${@:193:7}, and ${cc[1]}
would be same as ${194}.

I know I can do
    aa=( "${@:1:32}" )
    bb=( "${@:33:32}" )
    cc=( "${@:193:7}" )
    ...
But, it's so easy to make mistake and very difficult to catch it.

-- 
William Park <opengeometry@yahoo.ca>


       reply	other threads:[~2021-01-18  1:53 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20210118015252.GA3550.ref@node1.localdomain>
2021-01-18  1:52 ` William Park [this message]
2021-01-18 21:39   ` Bart Schaefer

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