Re: [Help-bash] Brace expansion with empty args

[Roman Rakus]

On 06/14/13 14:32, Greg Wooledge wrote:
> That's not correct.  There's no word splitting of the results.
I think it is correct, but maybe we didn't understand each other.
> imadev:~$ printf '<%s> ' {,c}; echo
so two steps:
1) {,c} converted to <null string> and c separated by space
2) <null string> c undergo word splitting and result is: c
> <c>
Here you see it
> imadev:~$ printf '<%s> ' ''{,c}; echo
1) ''{,c} converted to: ''<null string> and ''c
2) ''<null string> converted to <empty string>, ''c converted to <c>
> <> <c>
that's it
> imadev:~$ printf '<%s> ' ' '{,c}; echo
1) ' '{,c} -> ' '<null> and ' 'c
2) ' '<null> -> <space>, ' 'c -> <space>c
> < > < c>
correct
> imadev:~$ printf '<%s> ' 'a '{,c}; echo
> <a > <a c>
Similar as above
reference: 
http://www.gnu.org/software/bash/manual/bashref.html#Shell-Expansions

however, maybe the brace expansion really doesn't undergo word 
splitting, it is not mentioned on 
http://www.gnu.org/software/bash/manual/bashref.html#Word-Splitting

feel free to correct me

RR