On 8/6/13 6:49 AM, Janis Papanagnou wrote:
> Nonetheless right to left parsing seems the only sensible semantics in
> case of = and op= assignments.
Ummm...why is that? Unless you mean evaluating the RHS first, without
Andreas's implicit conversion from x+=a to x=x+a?
Chet
--
``The lyf so sho
On 8/6/13 5:21 AM, Dan Douglas wrote:
> On Tuesday, August 06, 2013 09:20:38 AM Andreas Schwab wrote:
>> DJ Mills writes:
>>
>>> I still don't see that;
>>
>> Go strictly from left to right.
>
> How do you assign something that hasn't been evaluated yet? Evaluating the
> expression on the RHS is
> >
> > Go strictly from left to right.
>
> How do you assign something that hasn't been evaluated yet? Evaluating the
> expression on the RHS is an absolute prerequisite to evaluating the
> assignment
> itself. (x += x) = 1 is nonsense. It evaluates to 0 = 1.
It makes sense, depending on the
On Sun, Aug 4, 2013 at 12:30 AM, Roland Mainz wrote:
> On Sun, Aug 4, 2013 at 12:04 AM, Dan Douglas wrote:
>> Is it specified what the value of x should be after this expression?
>>
>> x=0; : $((x+=x=1))
>>
>> Bash, ksh93, mksh, posh say 1. zsh, dash, busybox say 2. Clang and gcc both
>> throw wa
On Sun, Aug 4, 2013 at 12:04 AM, Dan Douglas wrote:
> Is it specified what the value of x should be after this expression?
>
> x=0; : $((x+=x=1))
>
> Bash, ksh93, mksh, posh say 1. zsh, dash, busybox say 2. Clang and gcc both
> throw warnings about it, but both plus icc agree on 2.
Just curious:
>
> Is it specified what the value of x should be after this expression?
Typically assignment cascades (including the op= variants) are
evaluated from right to left...
>
> x=0; : $((x+=x=1))
...so this would produce 2.
>
> Bash, ksh93, mksh, posh say 1. zsh, dash, busybox say 2. Clang and gc
On Sun, Aug 4, 2013 at 12:41 AM, Dan Douglas wrote:
> On Sunday, August 04, 2013 12:30:48 AM Roland Mainz wrote:
>> On Sun, Aug 4, 2013 at 12:04 AM, Dan Douglas wrote:
>> > Is it specified what the value of x should be after this expression?
>> >
>> > x=0; : $((x+=x=1))
>> >
>> > Bash, ksh93, mks
On Sunday, August 04, 2013 12:30:48 AM Roland Mainz wrote:
> On Sun, Aug 4, 2013 at 12:04 AM, Dan Douglas wrote:
> > Is it specified what the value of x should be after this expression?
> >
> > x=0; : $((x+=x=1))
> >
> > Bash, ksh93, mksh, posh say 1. zsh, dash, busybox say 2. Clang and gcc
> > b
