#!./perl
+#
+# This is a home for regular expression tests that don't fit into
+# the format supported by op/regexp.t. If you want to add a test
+# that does fit that format, add it to op/re_tests, not here.
-# $RCSfile: pat.t,v $$Revision: 4.0.1.1 $$Date: 91/06/07 12:01:26 $
+print "1..213\n";
-print "1..48\n";
+BEGIN {
+ chdir 't' if -d 't';
+ unshift @INC, "../lib" if -d "../lib";
+}
+eval 'use Config'; # Defaults assumed if this fails
+
+# XXX known to leak scalars
+$ENV{PERL_DESTRUCT_LEVEL} = 0 unless $ENV{PERL_DESTRUCT_LEVEL} > 3;
$x = "abc\ndef\n";
$XXX{345} = 345;
@XXX = ('ok 25','not ok 25', 'ok 26','not ok 26','not ok 27');
-while ($_ = shift(XXX)) {
+while ($_ = shift(@XXX)) {
?(.*)? && (print $1,"\n");
/not/ && reset;
/not ok 26/ && reset 'X';
}
-while (($key,$val) = each(XXX)) {
+while (($key,$val) = each(%XXX)) {
print "not ok 27\n";
exit;
}
: "not ok 45\n";
@words = ();
+pos = 0;
while (/to/g) {
push(@words, $&);
}
print join(':',@words) eq "to:to"
? "ok 46\n"
- : "not ok 46 @words\n";
+ : "not ok 46 `@words'\n";
+pos $_ = 0;
@words = /to/g;
print join(':',@words) eq "to:to"
? "ok 47\n"
- : "not ok 47 @words\n";
+ : "not ok 47 `@words'\n";
$_ = "abcdefghi";
$x = "$t1$t2$t3$t4$t5$t6$t7$t8$t9";
print $x eq '505550555' ? "ok 48\n" : "not ok 48 $x\n";
+
+$xyz = 'xyz';
+print "abc" =~ /^abc$|$xyz/ ? "ok 49\n" : "not ok 49\n";
+
+# perl 4.009 says "unmatched ()"
+eval '"abc" =~ /a(bc$)|$xyz/; $result = "$&:$1"';
+print $@ eq "" ? "ok 50\n" : "not ok 50\n";
+print $result eq "abc:bc" ? "ok 51\n" : "not ok 51\n";
+
+
+$_="abcfooabcbar";
+$x=/abc/g;
+print $` eq "" ? "ok 52\n" : "not ok 52\n" if $x;
+$x=/abc/g;
+print $` eq "abcfoo" ? "ok 53\n" : "not ok 53\n" if $x;
+$x=/abc/g;
+print $x == 0 ? "ok 54\n" : "not ok 54\n";
+pos = 0;
+$x=/ABC/gi;
+print $` eq "" ? "ok 55\n" : "not ok 55\n" if $x;
+$x=/ABC/gi;
+print $` eq "abcfoo" ? "ok 56\n" : "not ok 56\n" if $x;
+$x=/ABC/gi;
+print $x == 0 ? "ok 57\n" : "not ok 57\n";
+pos = 0;
+$x=/abc/g;
+print $' eq "fooabcbar" ? "ok 58\n" : "not ok 58\n" if $x;
+$x=/abc/g;
+print $' eq "bar" ? "ok 59\n" : "not ok 59\n" if $x;
+$_ .= '';
+@x=/abc/g;
+print scalar @x == 2 ? "ok 60\n" : "not ok 60\n";
+
+$_ = "abdc";
+pos $_ = 2;
+/\Gc/gc;
+print "not " if (pos $_) != 2;
+print "ok 61\n";
+/\Gc/g;
+print "not " if defined pos $_;
+print "ok 62\n";
+
+$out = 1;
+'abc' =~ m'a(?{ $out = 2 })b';
+print "not " if $out != 2;
+print "ok 63\n";
+
+$out = 1;
+'abc' =~ m'a(?{ $out = 3 })c';
+print "not " if $out != 1;
+print "ok 64\n";
+
+$_ = 'foobar1 bar2 foobar3 barfoobar5 foobar6';
+@out = /(?<!foo)bar./g;
+print "not " if "@out" ne 'bar2 barf';
+print "ok 65\n";
+
+# Tests which depend on REG_INFTY
+$reg_infty = defined $Config{reg_infty} ? $Config{reg_infty} : 32767;
+$reg_infty_m = $reg_infty - 1; $reg_infty_p = $reg_infty + 1;
+
+# As well as failing if the pattern matches do unexpected things, the
+# next three tests will fail if you should have picked up a lower-than-
+# default value for $reg_infty from Config.pm, but have not.
+
+undef $@;
+print "not " if eval q(('aaa' =~ /(a{1,$reg_infty_m})/)[0] ne 'aaa') || $@;
+print "ok 66\n";
+
+undef $@;
+print "not " if eval q(('a' x $reg_infty_m) !~ /a{$reg_infty_m}/) || $@;
+print "ok 67\n";
+
+undef $@;
+print "not " if eval q(('a' x ($reg_infty_m - 1)) =~ /a{$reg_infty_m}/) || $@;
+print "ok 68\n";
+
+undef $@;
+eval "'aaa' =~ /a{1,$reg_infty}/";
+print "not " if $@ !~ m%^\Q/a{1,$reg_infty}/: Quantifier in {,} bigger than%;
+print "ok 69\n";
+
+eval "'aaa' =~ /a{1,$reg_infty_p}/";
+print "not "
+ if $@ !~ m%^\Q/a{1,$reg_infty_p}/: Quantifier in {,} bigger than%;
+print "ok 70\n";
+undef $@;
+
+# Poke a couple more parse failures
+
+$context = 'x' x 256;
+eval qq("${context}y" =~ /(?<=$context)y/);
+print "not " if $@ !~ m%^\Q/(?<=\Ex+/: lookbehind longer than 255 not%;
+print "ok 71\n";
+
+# removed test
+print "ok 72\n";
+
+# Long Monsters
+$test = 73;
+for $l (125, 140, 250, 270, 300000, 30) { # Ordered to free memory
+ $a = 'a' x $l;
+ print "# length=$l\nnot " unless "ba$a=" =~ /a$a=/;
+ print "ok $test\n";
+ $test++;
+
+ print "not " if "b$a=" =~ /a$a=/;
+ print "ok $test\n";
+ $test++;
+}
+
+# 20000 nodes, each taking 3 words per string, and 1 per branch
+$long_constant_len = join '|', 12120 .. 32645;
+$long_var_len = join '|', 8120 .. 28645;
+%ans = ( 'ax13876y25677lbc' => 1,
+ 'ax13876y25677mcb' => 0, # not b.
+ 'ax13876y35677nbc' => 0, # Num too big
+ 'ax13876y25677y21378obc' => 1,
+ 'ax13876y25677y21378zbc' => 0, # Not followed by [k-o]
+ 'ax13876y25677y21378y21378kbc' => 1,
+ 'ax13876y25677y21378y21378kcb' => 0, # Not b.
+ 'ax13876y25677y21378y21378y21378kbc' => 0, # 5 runs
+ );
+
+for ( keys %ans ) {
+ print "# const-len `$_' not => $ans{$_}\nnot "
+ if $ans{$_} xor /a(?=([yx]($long_constant_len)){2,4}[k-o]).*b./o;
+ print "ok $test\n";
+ $test++;
+ print "# var-len `$_' not => $ans{$_}\nnot "
+ if $ans{$_} xor /a(?=([yx]($long_var_len)){2,4}[k-o]).*b./o;
+ print "ok $test\n";
+ $test++;
+}
+
+$_ = " a (bla()) and x(y b((l)u((e))) and b(l(e)e)e";
+$expect = "(bla()) ((l)u((e))) (l(e)e)";
+
+sub matchit {
+ m/
+ (
+ \(
+ (?{ $c = 1 }) # Initialize
+ (?:
+ (?(?{ $c == 0 }) # PREVIOUS iteration was OK, stop the loop
+ (?!
+ ) # Fail: will unwind one iteration back
+ )
+ (?:
+ [^()]+ # Match a big chunk
+ (?=
+ [()]
+ ) # Do not try to match subchunks
+ |
+ \(
+ (?{ ++$c })
+ |
+ \)
+ (?{ --$c })
+ )
+ )+ # This may not match with different subblocks
+ )
+ (?(?{ $c != 0 })
+ (?!
+ ) # Fail
+ ) # Otherwise the chunk 1 may succeed with $c>0
+ /xg;
+}
+
+@ans = ();
+push @ans, $res while $res = matchit;
+
+print "# ans='@ans'\n# expect='$expect'\nnot " if "@ans" ne "1 1 1";
+print "ok $test\n";
+$test++;
+
+@ans = matchit;
+
+print "# ans='@ans'\n# expect='$expect'\nnot " if "@ans" ne $expect;
+print "ok $test\n";
+$test++;
+
+print "not " unless "abc" =~ /^(??{"a"})b/;
+print "ok $test\n";
+$test++;
+
+my $matched;
+$matched = qr/\((?:(?>[^()]+)|(??{$matched}))*\)/;
+
+@ans = @ans1 = ();
+push(@ans, $res), push(@ans1, $&) while $res = m/$matched/g;
+
+print "# ans='@ans'\n# expect='$expect'\nnot " if "@ans" ne "1 1 1";
+print "ok $test\n";
+$test++;
+
+print "# ans1='@ans1'\n# expect='$expect'\nnot " if "@ans1" ne $expect;
+print "ok $test\n";
+$test++;
+
+@ans = m/$matched/g;
+
+print "# ans='@ans'\n# expect='$expect'\nnot " if "@ans" ne $expect;
+print "ok $test\n";
+$test++;
+
+@ans = ('a/b' =~ m%(.*/)?(.*)%); # Stack may be bad
+print "not " if "@ans" ne 'a/ b';
+print "ok $test\n";
+$test++;
+
+$code = '{$blah = 45}';
+$blah = 12;
+eval { /(?$code)/ };
+print "not " unless $@ and $@ =~ /not allowed at runtime/ and $blah == 12;
+print "ok $test\n";
+$test++;
+
+for $code ('{$blah = 45}','=xx') {
+ $blah = 12;
+ $res = eval { "xx" =~ /(?$code)/o };
+ if ($code eq '=xx') {
+ print "#'$@','$res','$blah'\nnot " unless not $@ and $res;
+ } else {
+ print "#'$@','$res','$blah'\nnot " unless $@ and $@ =~ /not allowed at runtime/ and $blah == 12;
+ }
+ print "ok $test\n";
+ $test++;
+}
+
+$code = '{$blah = 45}';
+$blah = 12;
+eval "/(?$code)/";
+print "not " if $blah != 45;
+print "ok $test\n";
+$test++;
+
+$blah = 12;
+/(?{$blah = 45})/;
+print "not " if $blah != 45;
+print "ok $test\n";
+$test++;
+
+$x = 'banana';
+$x =~ /.a/g;
+print "not " unless pos($x) == 2;
+print "ok $test\n";
+$test++;
+
+$x =~ /.z/gc;
+print "not " unless pos($x) == 2;
+print "ok $test\n";
+$test++;
+
+sub f {
+ my $p = $_[0];
+ return $p;
+}
+
+$x =~ /.a/g;
+print "not " unless f(pos($x)) == 4;
+print "ok $test\n";
+$test++;
+
+$x = $^R = 67;
+'foot' =~ /foo(?{$x = 12; 75})[t]/;
+print "not " unless $^R eq '75';
+print "ok $test\n";
+$test++;
+
+$x = $^R = 67;
+'foot' =~ /foo(?{$x = 12; 75})[xy]/;
+print "not " unless $^R eq '67' and $x eq '12';
+print "ok $test\n";
+$test++;
+
+$x = $^R = 67;
+'foot' =~ /foo(?{ $^R + 12 })((?{ $x = 12; $^R + 17 })[xy])?/;
+print "not " unless $^R eq '79' and $x eq '12';
+print "ok $test\n";
+$test++;
+
+print "not " unless qr/\b\v$/i eq '(?i-xsm:\bv$)';
+print "ok $test\n";
+$test++;
+
+print "not " unless qr/\b\v$/s eq '(?s-xim:\bv$)';
+print "ok $test\n";
+$test++;
+
+print "not " unless qr/\b\v$/m eq '(?m-xis:\bv$)';
+print "ok $test\n";
+$test++;
+
+print "not " unless qr/\b\v$/x eq '(?x-ism:\bv$)';
+print "ok $test\n";
+$test++;
+
+print "not " unless qr/\b\v$/xism eq '(?msix:\bv$)';
+print "ok $test\n";
+$test++;
+
+print "not " unless qr/\b\v$/ eq '(?-xism:\bv$)';
+print "ok $test\n";
+$test++;
+
+$_ = 'xabcx';
+foreach $ans ('', 'c') {
+ /(?<=(?=a)..)((?=c)|.)/g;
+ print "not " unless $1 eq $ans;
+ print "ok $test\n";
+ $test++;
+}
+
+$_ = 'a';
+foreach $ans ('', 'a', '') {
+ /^|a|$/g;
+ print "not " unless $& eq $ans;
+ print "ok $test\n";
+ $test++;
+}
+
+sub prefixify {
+ my($v,$a,$b,$res) = @_;
+ $v =~ s/\Q$a\E/$b/;
+ print "not " unless $res eq $v;
+ print "ok $test\n";
+ $test++;
+}
+prefixify('/a/b/lib/arch', "/a/b/lib", 'X/lib', 'X/lib/arch');
+prefixify('/a/b/man/arch', "/a/b/man", 'X/man', 'X/man/arch');
+
+$_ = 'var="foo"';
+/(\")/;
+print "not " unless $1 and /$1/;
+print "ok $test\n";
+$test++;
+
+$a=qr/(?{++$b})/;
+$b = 7;
+/$a$a/;
+print "not " unless $b eq '9';
+print "ok $test\n";
+$test++;
+
+$c="$a";
+/$a$a/;
+print "not " unless $b eq '11';
+print "ok $test\n";
+$test++;
+
+{
+ use re "eval";
+ /$a$c$a/;
+ print "not " unless $b eq '14';
+ print "ok $test\n";
+ $test++;
+
+ no re "eval";
+ $match = eval { /$a$c$a/ };
+ print "not "
+ unless $b eq '14' and $@ =~ /Eval-group not allowed/ and not $match;
+ print "ok $test\n";
+ $test++;
+}
+
+{
+ package aa;
+ $c = 2;
+ $::c = 3;
+ '' =~ /(?{ $c = 4 })/;
+ print "not " unless $c == 4;
+}
+print "ok $test\n";
+$test++;
+print "not " unless $c == 3;
+print "ok $test\n";
+$test++;
+
+sub must_warn_pat {
+ my $warn_pat = shift;
+ return sub { print "not " unless $_[0] =~ /$warn_pat/ }
+}
+
+sub must_warn {
+ my ($warn_pat, $code) = @_;
+ local %SIG;
+ eval 'BEGIN { use warnings; $SIG{__WARN__} = $warn_pat };' . $code;
+ print "ok $test\n";
+ $test++;
+}
+
+
+sub make_must_warn {
+ my $warn_pat = shift;
+ return sub { must_warn(must_warn_pat($warn_pat)) }
+}
+
+my $for_future = make_must_warn('reserved for future extensions');
+
+&$for_future('q(a:[b]:) =~ /[x[:foo:]]/');
+&$for_future('q(a=[b]=) =~ /[x[=foo=]]/');
+&$for_future('q(a.[b].) =~ /[x[.foo.]]/');
+
+# test if failure of patterns returns empty list
+$_ = 'aaa';
+@_ = /bbb/;
+print "not " if @_;
+print "ok $test\n";
+$test++;
+
+@_ = /bbb/g;
+print "not " if @_;
+print "ok $test\n";
+$test++;
+
+@_ = /(bbb)/;
+print "not " if @_;
+print "ok $test\n";
+$test++;
+
+@_ = /(bbb)/g;
+print "not " if @_;
+print "ok $test\n";
+$test++;
+
+/a(?=.$)/;
+print "not " if $#+ != 0 or $#- != 0;
+print "ok $test\n";
+$test++;
+
+print "not " if $+[0] != 2 or $-[0] != 1;
+print "ok $test\n";
+$test++;
+
+print "not "
+ if defined $+[1] or defined $-[1] or defined $+[2] or defined $-[2];
+print "ok $test\n";
+$test++;
+
+/a(a)(a)/;
+print "not " if $#+ != 2 or $#- != 2;
+print "ok $test\n";
+$test++;
+
+print "not " if $+[0] != 3 or $-[0] != 0;
+print "ok $test\n";
+$test++;
+
+print "not " if $+[1] != 2 or $-[1] != 1;
+print "ok $test\n";
+$test++;
+
+print "not " if $+[2] != 3 or $-[2] != 2;
+print "ok $test\n";
+$test++;
+
+print "not "
+ if defined $+[3] or defined $-[3] or defined $+[4] or defined $-[4];
+print "ok $test\n";
+$test++;
+
+/.(a)(b)?(a)/;
+print "not " if $#+ != 3 or $#- != 3;
+print "ok $test\n";
+$test++;
+
+print "not " if $+[0] != 3 or $-[0] != 0;
+print "ok $test\n";
+$test++;
+
+print "not " if $+[1] != 2 or $-[1] != 1;
+print "ok $test\n";
+$test++;
+
+print "not " if $+[3] != 3 or $-[3] != 2;
+print "ok $test\n";
+$test++;
+
+print "not "
+ if defined $+[2] or defined $-[2] or defined $+[4] or defined $-[4];
+print "ok $test\n";
+$test++;
+
+/.(a)/;
+print "not " if $#+ != 1 or $#- != 1;
+print "ok $test\n";
+$test++;
+
+print "not " if $+[0] != 2 or $-[0] != 0;
+print "ok $test\n";
+$test++;
+
+print "not " if $+[1] != 2 or $-[1] != 1;
+print "ok $test\n";
+$test++;
+
+print "not "
+ if defined $+[2] or defined $-[2] or defined $+[3] or defined $-[3];
+print "ok $test\n";
+$test++;
+
+/.(a)(ba*)?/;
+print "#$#-..$#+\nnot " if $#+ != 2 or $#- != 1;
+print "ok $test\n";
+$test++;
+
+$_ = 'aaa';
+pos = 1;
+@a = /\Ga/g;
+print "not " unless "@a" eq "a a";
+print "ok $test\n";
+$test++;
+
+$str = 'abcde';
+pos $str = 2;
+
+print "not " if $str =~ /^\G/;
+print "ok $test\n";
+$test++;
+
+print "not " if $str =~ /^.\G/;
+print "ok $test\n";
+$test++;
+
+print "not " unless $str =~ /^..\G/;
+print "ok $test\n";
+$test++;
+
+print "not " if $str =~ /^...\G/;
+print "ok $test\n";
+$test++;
+
+print "not " unless $str =~ /.\G./ and $& eq 'bc';
+print "ok $test\n";
+$test++;
+
+print "not " unless $str =~ /\G../ and $& eq 'cd';
+print "ok $test\n";
+$test++;
+
+undef $foo; undef $bar;
+print "#'$str','$foo','$bar'\nnot "
+ unless $str =~ /b(?{$foo = $_; $bar = pos})c/
+ and $foo eq 'abcde' and $bar eq 2;
+print "ok $test\n";
+$test++;
+
+undef $foo; undef $bar;
+pos $str = undef;
+print "#'$str','$foo','$bar'\nnot "
+ unless $str =~ /b(?{$foo = $_; $bar = pos})c/g
+ and $foo eq 'abcde' and $bar eq 2 and pos $str eq 3;
+print "ok $test\n";
+$test++;
+
+$_ = $str;
+
+undef $foo; undef $bar;
+print "#'$str','$foo','$bar'\nnot "
+ unless /b(?{$foo = $_; $bar = pos})c/
+ and $foo eq 'abcde' and $bar eq 2;
+print "ok $test\n";
+$test++;
+
+undef $foo; undef $bar;
+print "#'$str','$foo','$bar'\nnot "
+ unless /b(?{$foo = $_; $bar = pos})c/g
+ and $foo eq 'abcde' and $bar eq 2 and pos eq 3;
+print "ok $test\n";
+$test++;
+
+undef $foo; undef $bar;
+pos = undef;
+1 while /b(?{$foo = $_; $bar = pos})c/g;
+print "#'$str','$foo','$bar'\nnot "
+ unless $foo eq 'abcde' and $bar eq 2 and not defined pos;
+print "ok $test\n";
+$test++;
+
+undef $foo; undef $bar;
+$_ = 'abcde|abcde';
+print "#'$str','$foo','$bar','$_'\nnot "
+ unless s/b(?{$foo = $_; $bar = pos})c/x/g and $foo eq 'abcde|abcde'
+ and $bar eq 8 and $_ eq 'axde|axde';
+print "ok $test\n";
+$test++;
+
+@res = ();
+# List context:
+$_ = 'abcde|abcde';
+@dummy = /([ace]).(?{push @res, $1,$2})([ce])(?{push @res, $1,$2})/g;
+@res = map {defined $_ ? "'$_'" : 'undef'} @res;
+$res = "@res";
+print "#'@res' '$_'\nnot "
+ unless "@res" eq "'a' undef 'a' 'c' 'e' undef 'a' undef 'a' 'c'";
+print "ok $test\n";
+$test++;
+
+@res = ();
+@dummy = /([ace]).(?{push @res, $`,$&,$'})([ce])(?{push @res, $`,$&,$'})/g;
+@res = map {defined $_ ? "'$_'" : 'undef'} @res;
+$res = "@res";
+print "#'@res' '$_'\nnot "
+ unless "@res" eq
+ "'' 'ab' 'cde|abcde' " .
+ "'' 'abc' 'de|abcde' " .
+ "'abcd' 'e|' 'abcde' " .
+ "'abcde|' 'ab' 'cde' " .
+ "'abcde|' 'abc' 'de'" ;
+print "ok $test\n";
+$test++;
+
+#Some more \G anchor checks
+$foo='aabbccddeeffgg';
+
+pos($foo)=1;
+
+$foo=~/.\G(..)/g;
+print "not " unless($1 eq 'ab');
+print "ok $test\n";
+$test++;
+
+pos($foo) += 1;
+$foo=~/.\G(..)/g;
+print "not " unless($1 eq 'cc');
+print "ok $test\n";
+$test++;
+
+pos($foo) += 1;
+$foo=~/.\G(..)/g;
+print "not " unless($1 eq 'de');
+print "ok $test\n";
+$test++;
+
+print "not " unless $foo =~ /\Gef/g;
+print "ok $test\n";
+$test++;
+
+undef pos $foo;
+
+$foo=~/\G(..)/g;
+print "not " unless($1 eq 'aa');
+print "ok $test\n";
+$test++;
+
+$foo=~/\G(..)/g;
+print "not " unless($1 eq 'bb');
+print "ok $test\n";
+$test++;
+
+pos($foo)=5;
+$foo=~/\G(..)/g;
+print "not " unless($1 eq 'cd');
+print "ok $test\n";
+$test++;
+
+$_='123x123';
+@res = /(\d*|x)/g;
+print "not " unless('123||x|123|' eq join '|', @res);
+print "ok $test\n";
+$test++;
+
+# see if matching against temporaries (created via pp_helem()) is safe
+{ foo => "ok $test\n".$^X }->{foo} =~ /^(.*)\n/g;
+print "$1\n";
+$test++;
+
+# See if $i work inside (?{}) in the presense of saved substrings and
+# changing $_
+@a = qw(foo bar);
+@b = ();
+s/(\w)(?{push @b, $1})/,$1,/g for @a;
+
+print "# \@b='@b', expect 'f o o b a r'\nnot " unless("@b" eq "f o o b a r");
+print "ok $test\n";
+$test++;
+
+print "not " unless("@a" eq ",f,,o,,o, ,b,,a,,r,");
+print "ok $test\n";
+$test++;
+
+$brackets = qr{
+ { (?> [^{}]+ | (??{ $brackets }) )* }
+ }x;
+
+"{{}" =~ $brackets;
+print "ok $test\n"; # Did we survive?
+$test++;
+
+"something { long { and } hairy" =~ $brackets;
+print "ok $test\n"; # Did we survive?
+$test++;
+
+"something { long { and } hairy" =~ m/((??{ $brackets }))/;
+print "not " unless $1 eq "{ and }";
+print "ok $test\n";
+$test++;
+
+$_ = "a-a\nxbb";
+pos=1;
+m/^-.*bb/mg and print "not ";
+print "ok $test\n";
+$test++;
+
+$text = "aaXbXcc";
+pos($text)=0;
+$text =~ /\GXb*X/g and print 'not ';
+print "ok $test\n";
+$test++;
+
+$text = "xA\n" x 500;
+$text =~ /^\s*A/m and print 'not ';
+print "ok $test\n";
+$test++;
+
+$text = "abc dbf";
+@res = ($text =~ /.*?(b).*?\b/g);
+"@res" eq 'b b' or print 'not ';
+print "ok $test\n";
+$test++;
+
+@a = map chr,0..255;
+
+@b = grep(/\S/,@a);
+@c = grep(/[^\s]/,@a);
+print "not " if "@b" ne "@c";
+print "ok $test\n";
+$test++;
+
+@b = grep(/\S/,@a);
+@c = grep(/[\S]/,@a);
+print "not " if "@b" ne "@c";
+print "ok $test\n";
+$test++;
+
+@b = grep(/\s/,@a);
+@c = grep(/[^\S]/,@a);
+print "not " if "@b" ne "@c";
+print "ok $test\n";
+$test++;
+
+@b = grep(/\s/,@a);
+@c = grep(/[\s]/,@a);
+print "not " if "@b" ne "@c";
+print "ok $test\n";
+$test++;
+
+@b = grep(/\D/,@a);
+@c = grep(/[^\d]/,@a);
+print "not " if "@b" ne "@c";
+print "ok $test\n";
+$test++;
+
+@b = grep(/\D/,@a);
+@c = grep(/[\D]/,@a);
+print "not " if "@b" ne "@c";
+print "ok $test\n";
+$test++;
+
+@b = grep(/\d/,@a);
+@c = grep(/[^\D]/,@a);
+print "not " if "@b" ne "@c";
+print "ok $test\n";
+$test++;
+
+@b = grep(/\d/,@a);
+@c = grep(/[\d]/,@a);
+print "not " if "@b" ne "@c";
+print "ok $test\n";
+$test++;
+
+@b = grep(/\W/,@a);
+@c = grep(/[^\w]/,@a);
+print "not " if "@b" ne "@c";
+print "ok $test\n";
+$test++;
+
+@b = grep(/\W/,@a);
+@c = grep(/[\W]/,@a);
+print "not " if "@b" ne "@c";
+print "ok $test\n";
+$test++;
+
+@b = grep(/\w/,@a);
+@c = grep(/[^\W]/,@a);
+print "not " if "@b" ne "@c";
+print "ok $test\n";
+$test++;
+
+@b = grep(/\w/,@a);
+@c = grep(/[\w]/,@a);
+print "not " if "@b" ne "@c";
+print "ok $test\n";
+$test++;
+
+# see if backtracking optimization works correctly
+"\n\n" =~ /\n $ \n/x or print "not ";
+print "ok $test\n";
+$test++;
+
+"\n\n" =~ /\n* $ \n/x or print "not ";
+print "ok $test\n";
+$test++;
+
+"\n\n" =~ /\n+ $ \n/x or print "not ";
+print "ok $test\n";
+$test++;
+
+[] =~ /^ARRAY/ or print "# [] \nnot ";
+print "ok $test\n";
+$test++;
+
+eval << 'EOE';
+{
+ package S;
+ use overload '""' => sub { 'Object S' };
+ sub new { bless [] }
+}
+$a = 'S'->new;
+EOE
+
+$a and $a =~ /^Object\sS/ or print "# '$a' \nnot ";
+print "ok $test\n";
+$test++;