On Mon, Jun 09, 2008 at 03:36:29PM +0100, Stephane Chazelas wrote:
[...]
> I was about to submit another bug report about that (the fact
> that a=x b=$a; echo $b doesn't output x) when I saw there was
> one already.
>
> I was surprised to see:
>
> Tags: wontfix;
>
> I read through the lengthy discussion, but it doesn't explain
> why it's tagged as wontfix.
>
> Both common sense and SUSv3 state clearly that it is a bug.
>
> In the Bourne shell, assignments were performed right to left
> (you had to do "b=$a a=x"). And I seem to recall reading (either
> in the standard itself or in some mailing list about it), that
> POSIX had made it clear that it should be performed left to
> right to avoid such unintuitive oddities.
>
> Anyway, it's true that at least FreeBSD sh has the same problem,
> so one should avoid such a syntax anyway for the time being.
[...]
There are other issues:
1$ a=x command eval 'echo $a'
2$ f() { echo $b; }
3$ b=x f
x
4$ echo $b
x
(1) should have output "x" and (4) shouldn't have output "x" if
I read POSIX correctly.
--
Stéphane
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