Re: language inconsistency(wart) & RFE

[Linda Walsh]

Here is an example of what I consider to be
strange and/or inconsistent behavior (  tests 
2 & 3 fail).

test 3's failure is a real puzzler:

-----
#!/bin/bash

shopt -s expand_aliases ; alias my=declare
alias array='my -a' int='my -i'

dmp () { printf "%q\n" "${*:?}" ; }

ip=10.20.30.40
array  parts=()
(IFS=.; parts=( $ip ) )
array answers=( 
 '10 20 30 40'  
 '1 .2 .3 .4'
 '1 222 .3 .4' 
 '192.168.0.1/24::{ [ipaddr]="192.168.0.1/24" [address]="192.168.0.1" [prefixlen]="24" ; }'
)
#


array addr_fields=(ipaddr address prefixlen)
                 
assignparts() { parts=( $ip ) ; }

tst0 () { my IFS=. ; assignparts ; echo -E "${parts[@]}"; }
tst1 () { my IFS=0 ; assignparts ; echo -E "${parts[@]}"; }
tst2 () { parts[1]=222; echo -E "${parts[@]}" ; }

tst3 () {
 my ipaddr="$1"; shift;
 int status=0
 my pat='^([^/]+)/([0-9]+)\s*$'
 my address prefixlen
 if [[ ! $ipaddr =~ $pat ]]; then
   echo >&2 "Error in ip/netsize format: \"$ipaddr\""
   status=1
 else
   address=${BASH_REMATCH[1]}
   prefixlen=${BASH_REMATCH[2]}
   my out=""
   for flds in "${addr_fields[@]}"; do
     out+="[$flds]=\"${!flds}\" "
   done
   printf "{ %s; }" "$out"
 fi
 return $status
}



int passno=0 tests=0
my fmt="Case %d got/Expected:\n \"%q\"\n \"%q\"\n"


testor () {
 int tstno
 my out=""
 for tstno in {0..3}; do
   tests+=1
   exp="${answers[tstno]}"
   if [[ $exp =~ :: ]]; then
     my args="${exp%::*}"
     exp="${exp#*::}"
     out="$(tst$tstno $args)"
   else
     out="$(tst$tstno)"
   fi
   if [[ $out != $exp ]]; then
     printf >&2 "$fmt" "$tstno" "$out" "$exp"
     continue
   fi
   passno+=1
 done
}

testor
echo "Passed $passno/$tests tests."
----------------

output:
Case 2 got/Expected:
"222"
"1\ 222\ .3\ .4"
Case 3 got/Expected:
"\{\ \[ipaddr\]=\"192.168.0.1/24\"\ \[address\]=\"192.168.0.1\"\ 
\[prefixlen\]=\"24\"\ \;\ \}"
"\{\ \[ipaddr\]=\"192.168.0.1/24\"\ \[address\]=\"192.168.0.1\"\ 
\[prefixlen\]=\"24\"\ \;\ \}"
Passed 2/4 tests.

The outputs for case 3 look identical -- I was using %s to print
them out, but switched to "%q", to ensure no hidden chars...

case 2 --
???  Why didn't it only change the 1 member?