1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
# @(#)precedence_test 1.0 91/07/24 Maarten Litmaath
# test of relative precedences for `&&' and `||' operators
echo "\`Say' echos its argument. Its return value is of no interest."
case `echo -n` in
'') Say () { echo -n "$*" ; } ;;
*) Say () { echo "$*\c" ; } ;;
esac
echo "\`Truth' echos its argument and returns a TRUE result."
Truth () {
Say $1;
return 0;
}
echo "\`False' echos its argument and returns a FALSE result."
False () {
Say $1;
return 1;
}
echo ""
cmd1='$open $test1 && $test2 $close || $test3'
cmd2='$test1 || $open $test2 && $test3 $close'
grouping_sh=
grouping_C='( )'
test3='Say 3'
for i in 1 2
do
eval proto=\$cmd$i
for test1 in 'Truth 1' 'False 1'
do
for test2 in 'Truth 2' 'False 2'
do
for precedence in sh C
do
eval set x \$grouping_$precedence
shift
open=${1-' '}
close=${2-' '}
eval cmd=\""$proto"\"
Say "$cmd output="
output=`eval "$cmd"`
Say "$output"
read correct || { echo 'Input fubar. Abort.' >&2; exit 1; }
test "X$output" = "X$correct" || echo " correct=$correct"
echo ''
done
echo ''
done
done
done << EOF
12
12
123
123
13
13
13
13
13
1
13
1
123
123
12
12
EOF
|
