Re: Non-greedy matching (S-flag) behaving weird

[Peter Stephenson <p.stephenson@xxxxxxxxxxx>]

On Fri, 8 Jun 2018 08:48:05 +0200
Sebastian Gniazdowski <sgniazdowski@xxxxxxxxx> wrote:
> below subsitution is a really easy one. First parenthesis: anything
> preceding, second parenthesis: print|END|BEGIN, third parenthesis:
> anything that follows print|END etc.
> 
> ~ __wrd2="echo abc | awk '{ print \$1 } END { print 'Finished' }'"
> 
> ~
> __wrd2="${(S)__wrd2/(#b)(#s)(*)(BEGIN|END|print)(*)(#e)/${match[3]}}";
> 
> ~ echo "__wrd2: $__wrd2, match[1]: ${match[1]}, match[2]: ${match[2]},
> match[3]: ${match[3]}"; echo $?
> 
> __wrd2:  'Finished' }', match[1]: echo abc | awk '{ print $1 } END { ,
> match[2]: print, match[3]:  'Finished' }'
> 
> As it can be seen, match[1] obtains almost whole string. The matching
> is ungreedy, why `print' isn't matched? Why matching continues to last
> keyword, "END", skipping "print"

You've got a "*" at the beginning and the end  They're both doing
matching --- they're is no single "matching" to which a rule applies ,
there are just separate patterns all attempting to match.  You're going
to have to work out some way of forcing one of them to match more than
the other.

pws