hush_test/hush-arith/arith2.sub

# bash 3.2 apparently thinks that ++7 is 7 etc
(  echo $(( --7 ))   )
(  echo $(( ++7 ))   )
(  echo $(( -- 7 ))  )
(  echo $(( ++ 7 ))  )

#ash# ((++array[0] ))
#ash# echo 1 $array
#ash# (( ++ array[0] ))
#ash# echo 2 $array

#ash# (( ++a ))
#ash# echo 1 $a
#ash# (( ++ a ))
#ash# echo 2 $a

#ash# (( --a ))
#ash# echo 1 $a
#ash# (( -- a ))
#ash# echo 0 $a
      a=0

echo 5 $(( 4 + ++a ))
echo 1 $a

# ash doesn't handle it right...
#ash# echo 6 $(( 4+++a ))
#ash# echo 2 $a
      a=2

# ash doesn't handle it right...
#ash# echo 3 $(( 4---a ))
#ash# echo 1 $a
      a=1

echo 4 $(( 4 - -- a ))
echo 0 $a

#ash# (( -- ))
# bash 3.2 apparently thinks that ---7 is -7
#ash# echo $(( ---7 ))
(  echo $(( -- - 7 ))  )

#ash# (( ++ ))
# bash 3.2: 7
#ash# echo 7 $(( ++7 ))
(  echo $(( ++ + 7 ))  )

# bash 3.2: -7
#ash# echo -7 $(( ++-7 ))
# bash 3.2: -7
#ash# echo -7 $(( ++ - 7 ))

# bash 3.2: 7
#ash# echo 7 $(( +--7 ))
# bash 3.2: 7
#ash# echo 7 $(( -- + 7 ))
1	niro	984	# bash 3.2 apparently thinks that ++7 is 7 etc
2			( echo $(( --7 )) )
3			( echo $(( ++7 )) )
4			( echo $(( -- 7 )) )
5			( echo $(( ++ 7 )) )
6
7			#ash# ((++array[0] ))
8			#ash# echo 1 $array
9			#ash# (( ++ array[0] ))
10			#ash# echo 2 $array
11
12			#ash# (( ++a ))
13			#ash# echo 1 $a
14			#ash# (( ++ a ))
15			#ash# echo 2 $a
16
17			#ash# (( --a ))
18			#ash# echo 1 $a
19			#ash# (( -- a ))
20			#ash# echo 0 $a
21			a=0
22
23			echo 5 $(( 4 + ++a ))
24			echo 1 $a
25
26			# ash doesn't handle it right...
27			#ash# echo 6 $(( 4+++a ))
28			#ash# echo 2 $a
29			a=2
30
31			# ash doesn't handle it right...
32			#ash# echo 3 $(( 4---a ))
33			#ash# echo 1 $a
34			a=1
35
36			echo 4 $(( 4 - -- a ))
37			echo 0 $a
38
39			#ash# (( -- ))
40			# bash 3.2 apparently thinks that ---7 is -7
41			#ash# echo $(( ---7 ))
42			( echo $(( -- - 7 )) )
43
44			#ash# (( ++ ))
45			# bash 3.2: 7
46			#ash# echo 7 $(( ++7 ))
47			( echo $(( ++ + 7 )) )
48
49			# bash 3.2: -7
50			#ash# echo -7 $(( ++-7 ))
51			# bash 3.2: -7
52			#ash# echo -7 $(( ++ - 7 ))
53
54			# bash 3.2: 7
55			#ash# echo 7 $(( +--7 ))
56			# bash 3.2: 7
57			#ash# echo 7 $(( -- + 7 ))