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#!./perl
# $RCSfile: eval.t,v $$Revision: 4.1 $$Date: 92/08/07 18:27:48 $
print "1..22\n";
eval 'print "ok 1\n";';
if ($@ eq '') {print "ok 2\n";} else {print "not ok 2\n";}
eval "\$foo\n = # this is a comment\n'ok 3';";
print $foo,"\n";
eval "\$foo\n = # this is a comment\n'ok 4\n';";
print $foo;
print eval '
$foo =;'; # this tests for a call through yyerror()
if ($@ =~ /line 2/) {print "ok 5\n";} else {print "not ok 5\n";}
print eval '$foo = /'; # this tests for a call through fatal()
if ($@ =~ /Search/) {print "ok 6\n";} else {print "not ok 6\n";}
print eval '"ok 7\n";';
# calculate a factorial with recursive evals
$foo = 5;
$fact = 'if ($foo <= 1) {1;} else {push(@x,$foo--); (eval $fact) * pop(@x);}';
$ans = eval $fact;
if ($ans == 120) {print "ok 8\n";} else {print "not ok 8\n";}
$foo = 5;
$fact = 'local($foo)=$foo; $foo <= 1 ? 1 : $foo-- * (eval $fact);';
$ans = eval $fact;
if ($ans == 120) {print "ok 9\n";} else {print "not ok 9 $ans\n";}
open(try,'>Op.eval');
print try 'print "ok 10\n"; unlink "Op.eval";',"\n";
close try;
do 'Op.eval'; print $@;
# Test the singlequoted eval optimizer
$i = 11;
for (1..3) {
eval 'print "ok ", $i++, "\n"';
}
eval {
print "ok 14\n";
die "ok 16\n";
1;
} || print "ok 15\n$@";
# check whether eval EXPR determines value of EXPR correctly
{
my @a = qw(a b c d);
my @b = eval @a;
print "@b" eq '4' ? "ok 17\n" : "not ok 17\n";
print $@ ? "not ok 18\n" : "ok 18\n";
my $a = q[defined(wantarray) ? (wantarray ? ($b='A') : ($b='S')) : ($b='V')];
my $b;
@a = eval $a;
print "@a" eq 'A' ? "ok 19\n" : "# $b\nnot ok 19\n";
print $b eq 'A' ? "ok 20\n" : "# $b\nnot ok 20\n";
$_ = eval $a;
print $b eq 'S' ? "ok 21\n" : "# $b\nnot ok 21\n";
eval $a;
print $b eq 'V' ? "ok 22\n" : "# $b\nnot ok 22\n";
}
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