On Fri, Aug 9, 2013 at 1:00 AM, David Korn <[email protected]> wrote:
> cc: [email protected]
> Subject: Re: [ast-developers] typeset in signal trap ==> compound array
> contains typeset statements
> --------
>
>> Can anyone explain why the following code contains FOUR array elements
>> instead of two? I'm getting desperate with this. I only want to
>> declare c.car[index].int as a integer variable (aka typeset -li) but
>> receive this garbage instead when running it with ast-ksh.20130807:
>>
>> ksh -c 'set -o nounset ; compound c ; compound -a c.car; integer
>> c.cari=0; trap "typeset -i c.car[c.cari++].int=\${.sh.sig.value.int}"
>> RTMIN RTMAX ; kill -q4 -s RTMIN $$ ; true ; kill -q17 -s RTMAX $$ ;
>> true ; print -v c'
>> (
>> typeset -C -a car=(
>> [0]=(
>> int=4
>> )
>> [1]=(
>> typeset -i int=0
>> )
>> [2]=(
>> int=17
>> )
>> [3]=(
>> typeset -i int=0
>> )
>> )
>> typeset -l -i cari=4
>> )
>
> I can explain why it is happening, but I haven't decided how to resolve it.
>
> typeset foo=bar
> is parsed as if it is
> foo=bar typeset foo
>
> However since you have
> typeset foo[i++]=bar
> this becomes
> foo[i++]=bar typeset foo[i++]
>
> Your workaround is to do
> typeset -i c.car
> before the trap and do
> trap "tc.car[c.cari++].int=\${.sh.sig.value.int}"
> for the trap.
Mhhh... a workaround may be this one:
-- snip --
$ cat test1.sh
set -o nounset
compound c
compound -a c.car
integer c.cari=0
integer trap_i # only be used by trap below
trap '(( trap_i=c.cari++ )) ; typeset -i
c.car[trap_i].int=${.sh.sig.value.int}' RTMIN RTMAX
kill -q4 -s RTMIN $$
kill -q17 -s RTMAX $$
print -v c
$ ./arch/linux.i386-64/bin/ksh -x test1.sh
+ set -o nounset
+ typeset -C c
+ typeset -C -a c.car
+ c.cari=0
+ typeset -li c.cari
+ typeset -li trap_i
+ trap '(( trap_i=c.cari++ )) ; typeset -i
c.car[trap_i].int=${.sh.sig.value.int}' RTMIN RTMAX
+ kill -q4 -s RTMIN 55281
+ (( trap_i=c.cari++ ))
+ c.car[0].int=4
+ typeset -i 'c.car[trap_i].int'
+ kill -q17 -s RTMAX 55281
+ (( trap_i=c.cari++ ))
+ c.car[1].int=17
+ typeset -i 'c.car[trap_i].int'
+ print -v c
(
typeset -C -a car=(
[0]=(
typeset -i int=4
)
[1]=(
typeset -i int=17
)
)
typeset -l -i cari=2
)
-- snip --
----
Bye,
Roland
--
__ . . __
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