# precedence   [plain text]

```# @(#)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
```