[bug-gawk] pretty-print eats parentheses (3)

[Hermann Peifer]

Hi,

I just noted a case where original and pretty-printed code have different 
calculation results, see the sample code below. I remember having reported 
similar issues earlier, e.g. 
http://lists.gnu.org/archive/html/bug-gawk/2014-11/msg00006.html. I guess it is 
tricky to get these parentheses exactly right.

Hermann

# Sample code: so far, so good
$ gawk 'BEGIN{ print 10 - (1 + 3 * 3) }'
0

# Pretty-printed code gets to a different result
$ gawk -o 'BEGIN{ print 10 - (1 + 3 * 3) }' && gawk -f awkprof.out
18

$ cat awkprof.out
BEGIN {
        print 10 - 1 + 3 * 3
}