ash_test/ash-arith/arith1.sub

# test of redone post-increment and post-decrement code
(  echo $(( 4-- ))   )
(  echo $(( 4++ ))   )
(  echo $(( 4 -- ))  )
(  echo $(( 4 ++ ))  )

#ash# (( array[0]++ ))
#ash# echo ${array}

#ash# (( array[0] ++ ))
#ash# echo ${array}

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

echo 6 $(( a ++ + 4 ))
echo 3 $a

echo 7 $(( a+++4 ))
echo 4 $a

echo 0 $(( a---4 ))
echo 3 $a

echo 7 $(( a -- + 4 ))
echo 2 $a

echo -2 $(( a -- - 4 ))
echo 1 $a

#ash# (( ++ + 7 ))

#ash# (( ++ ))
(  echo $(( +++7 ))  )
# bash 3.2 apparently thinks that ++ +7 is 7
#ash# echo $(( ++ + 7 ))
#ash# (( -- ))
1	niro	816	# test of redone post-increment and post-decrement code
2			( echo $(( 4-- )) )
3			( echo $(( 4++ )) )
4			( echo $(( 4 -- )) )
5			( echo $(( 4 ++ )) )
6
7			#ash# (( array[0]++ ))
8			#ash# echo ${array}
9
10			#ash# (( array[0] ++ ))
11			#ash# echo ${array}
12
13			#ash# (( a++ ))
14			#ash# echo $a
15			#ash# (( a ++ ))
16			#ash# echo $a
17			a=2
18
19			echo 6 $(( a ++ + 4 ))
20			echo 3 $a
21
22			echo 7 $(( a+++4 ))
23			echo 4 $a
24
25			echo 0 $(( a---4 ))
26			echo 3 $a
27
28			echo 7 $(( a -- + 4 ))
29			echo 2 $a
30
31			echo -2 $(( a -- - 4 ))
32			echo 1 $a
33
34			#ash# (( ++ + 7 ))
35
36			#ash# (( ++ ))
37			( echo $(( +++7 )) )
38			# bash 3.2 apparently thinks that ++ +7 is 7
39			#ash# echo $(( ++ + 7 ))
40			#ash# (( -- ))