Re: is it really required that arr['1']=bla gives syntax error instead of parse '1' as 1

[Alex fxmbsw7 Ratchev]

(( "2" + 4 ))
noerr

On Mon, Jul 19, 2021, 17:57 Greg Wooledge <greg@wooledge.org> wrote:

> On Mon, Jul 19, 2021 at 10:30:36AM -0500, Jesse Hathaway wrote:
> > That does seem inconsistent with how bash treats double quoted array
> > subscripts and variable subscripts.
> >
> > all these work:
> >
> >     arr["1"]=bar
> >     one='1'
> >     arr[$one]=foo
> >     arr["$one"]=baz
> >
>
> In <https://lists.gnu.org/archive/html/bug-bash/2021-02/msg00189.html>
> Chet says that "The contents of (( are expanded as if they are between
> double quotes".  I wonder if this generalizes to *all* arithmetic
> contexts.
>
> unicorn:~$ (( 4 + '1' ))
> bash: ((: 4 + '1' : syntax error: operand expected (error token is "'1' ")
> unicorn:~$ arr['1']=bla
> bash: '1': syntax error: operand expected (error token is "'1'")
> unicorn:~$ echo "${LOGNAME:'1'}"
> bash: LOGNAME: '1': syntax error: operand expected (error token is "'1'")
> unicorn:~$ let x='1'+2
> unicorn:~$ echo "$x"
> 3
> unicorn:~$ [[ 4 -gt '1' ]]
> unicorn:~$
>
> Hmm.  Not all of them, apparently.  Some of them.
>
>