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|
#!./perl
#
# test the logical operators '&&', '||', '!', 'and', 'or', 'not'
#
BEGIN {
chdir 't' if -d 't';
unshift @INC, '../lib';
}
print "1..7\n";
my $test = 0;
for my $i (undef, 0 .. 2, "", "0 but true") {
my $true = 1;
my $false = 0;
for my $j (undef, 0 .. 2, "", "0 but true") {
$true &&= !(
((!$i || !$j) != !($i && $j))
or (!($i || $j) != (!$i && !$j))
or (!!($i || $j) != !(!$i && !$j))
or (!(!$i || !$j) != !!($i && $j))
);
$false ||= (
((!$i || !$j) == !!($i && $j))
and (!!($i || $j) == (!$i && !$j))
and ((!$i || $j) == ($i && !$j))
and (($i || !$j) != (!$i && $j))
);
}
if (not $true) {
print "not ";
} elsif ($false) {
print "not ";
}
print "ok ", ++$test, "\n";
}
# $test == 6
my $i = 0;
(($i ||= 1) &&= 3) += 4;
print "not " unless $i == 7;
print "ok ", ++$test, "\n";
|
