[perl5.git] / t / op / subst.t

#!./perl

# $RCSfile: s.t,v $$Revision: 4.1 $$Date: 92/08/07 18:28:22 $

print "1..69\n";

$x = 'foo';
$_ = "x";
s/x/\$x/;
print "#1\t:$_: eq :\$x:\n";
if ($_ eq '$x') {print "ok 1\n";} else {print "not ok 1\n";}

$_ = "x";
s/x/$x/;
print "#2\t:$_: eq :foo:\n";
if ($_ eq 'foo') {print "ok 2\n";} else {print "not ok 2\n";}

$_ = "x";
s/x/\$x $x/;
print "#3\t:$_: eq :\$x foo:\n";
if ($_ eq '$x foo') {print "ok 3\n";} else {print "not ok 3\n";}

$b = 'cd';
($a = 'abcdef') =~ s<(b${b}e)>'\n$1';
print "#4\t:$1: eq :bcde:\n";
print "#4\t:$a: eq :a\\n\$1f:\n";
if ($1 eq 'bcde' && $a eq 'a\n$1f') {print "ok 4\n";} else {print "not ok 4\n";}

$a = 'abacada';
if (($a =~ s/a/x/g) == 4 && $a eq 'xbxcxdx')
    {print "ok 5\n";} else {print "not ok 5\n";}

if (($a =~ s/a/y/g) == 0 && $a eq 'xbxcxdx')
    {print "ok 6\n";} else {print "not ok 6 $a\n";}

if (($a =~ s/b/y/g) == 1 && $a eq 'xyxcxdx')
    {print "ok 7\n";} else {print "not ok 7 $a\n";}

$_ = 'ABACADA';
if (/a/i && s///gi && $_ eq 'BCD') {print "ok 8\n";} else {print "not ok 8 $_\n";}

$_ = '\\' x 4;
if (length($_) == 4) {print "ok 9\n";} else {print "not ok 9\n";}
s/\\/\\\\/g;
if ($_ eq '\\' x 8) {print "ok 10\n";} else {print "not ok 10 $_\n";}

$_ = '\/' x 4;
if (length($_) == 8) {print "ok 11\n";} else {print "not ok 11\n";}
s/\//\/\//g;
if ($_ eq '\\//' x 4) {print "ok 12\n";} else {print "not ok 12\n";}
if (length($_) == 12) {print "ok 13\n";} else {print "not ok 13\n";}

$_ = 'aaaXXXXbbb';
s/^a//;
print $_ eq 'aaXXXXbbb' ? "ok 14\n" : "not ok 14\n";

$_ = 'aaaXXXXbbb';
s/a//;
print $_ eq 'aaXXXXbbb' ? "ok 15\n" : "not ok 15\n";

$_ = 'aaaXXXXbbb';
s/^a/b/;
print $_ eq 'baaXXXXbbb' ? "ok 16\n" : "not ok 16\n";

$_ = 'aaaXXXXbbb';
s/a/b/;
print $_ eq 'baaXXXXbbb' ? "ok 17\n" : "not ok 17\n";

$_ = 'aaaXXXXbbb';
s/aa//;
print $_ eq 'aXXXXbbb' ? "ok 18\n" : "not ok 18\n";

$_ = 'aaaXXXXbbb';
s/aa/b/;
print $_ eq 'baXXXXbbb' ? "ok 19\n" : "not ok 19\n";

$_ = 'aaaXXXXbbb';
s/b$//;
print $_ eq 'aaaXXXXbb' ? "ok 20\n" : "not ok 20\n";

$_ = 'aaaXXXXbbb';
s/b//;
print $_ eq 'aaaXXXXbb' ? "ok 21\n" : "not ok 21\n";

$_ = 'aaaXXXXbbb';
s/bb//;
print $_ eq 'aaaXXXXb' ? "ok 22\n" : "not ok 22\n";

$_ = 'aaaXXXXbbb';
s/aX/y/;
print $_ eq 'aayXXXbbb' ? "ok 23\n" : "not ok 23\n";

$_ = 'aaaXXXXbbb';
s/Xb/z/;
print $_ eq 'aaaXXXzbb' ? "ok 24\n" : "not ok 24\n";

$_ = 'aaaXXXXbbb';
s/aaX.*Xbb//;
print $_ eq 'ab' ? "ok 25\n" : "not ok 25\n";

$_ = 'aaaXXXXbbb';
s/bb/x/;
print $_ eq 'aaaXXXXxb' ? "ok 26\n" : "not ok 26\n";

# now for some unoptimized versions of the same.

$_ = 'aaaXXXXbbb';
$x ne $x || s/^a//;
print $_ eq 'aaXXXXbbb' ? "ok 27\n" : "not ok 27\n";

$_ = 'aaaXXXXbbb';
$x ne $x || s/a//;
print $_ eq 'aaXXXXbbb' ? "ok 28\n" : "not ok 28\n";

$_ = 'aaaXXXXbbb';
$x ne $x || s/^a/b/;
print $_ eq 'baaXXXXbbb' ? "ok 29\n" : "not ok 29\n";

$_ = 'aaaXXXXbbb';
$x ne $x || s/a/b/;
print $_ eq 'baaXXXXbbb' ? "ok 30\n" : "not ok 30\n";

$_ = 'aaaXXXXbbb';
$x ne $x || s/aa//;
print $_ eq 'aXXXXbbb' ? "ok 31\n" : "not ok 31\n";

$_ = 'aaaXXXXbbb';
$x ne $x || s/aa/b/;
print $_ eq 'baXXXXbbb' ? "ok 32\n" : "not ok 32\n";

$_ = 'aaaXXXXbbb';
$x ne $x || s/b$//;
print $_ eq 'aaaXXXXbb' ? "ok 33\n" : "not ok 33\n";

$_ = 'aaaXXXXbbb';
$x ne $x || s/b//;
print $_ eq 'aaaXXXXbb' ? "ok 34\n" : "not ok 34\n";

$_ = 'aaaXXXXbbb';
$x ne $x || s/bb//;
print $_ eq 'aaaXXXXb' ? "ok 35\n" : "not ok 35\n";

$_ = 'aaaXXXXbbb';
$x ne $x || s/aX/y/;
print $_ eq 'aayXXXbbb' ? "ok 36\n" : "not ok 36\n";

$_ = 'aaaXXXXbbb';
$x ne $x || s/Xb/z/;
print $_ eq 'aaaXXXzbb' ? "ok 37\n" : "not ok 37\n";

$_ = 'aaaXXXXbbb';
$x ne $x || s/aaX.*Xbb//;
print $_ eq 'ab' ? "ok 38\n" : "not ok 38\n";

$_ = 'aaaXXXXbbb';
$x ne $x || s/bb/x/;
print $_ eq 'aaaXXXXxb' ? "ok 39\n" : "not ok 39\n";

$_ = 'abc123xyz';
s/(\d+)/$1*2/e;              # yields 'abc246xyz'
print $_ eq 'abc246xyz' ? "ok 40\n" : "not ok 40\n";
s/(\d+)/sprintf("%5d",$1)/e; # yields 'abc  246xyz'
print $_ eq 'abc  246xyz' ? "ok 41\n" : "not ok 41\n";
s/(\w)/$1 x 2/eg;            # yields 'aabbcc  224466xxyyzz'
print $_ eq 'aabbcc  224466xxyyzz' ? "ok 42\n" : "not ok 42\n";

$_ = "aaaaa";
print y/a/b/ == 5 ? "ok 43\n" : "not ok 43\n";
print y/a/b/ == 0 ? "ok 44\n" : "not ok 44\n";
print y/b// == 5 ? "ok 45\n" : "not ok 45\n";
print y/b/c/s == 5 ? "ok 46\n" : "not ok 46\n";
print y/c// == 1 ? "ok 47\n" : "not ok 47\n";
print y/c//d == 1 ? "ok 48\n" : "not ok 48\n";
print $_ eq "" ? "ok 49\n" : "not ok 49\n";

$_ = "Now is the %#*! time for all good men...";
print (($x=(y/a-zA-Z //cd)) == 7 ? "ok 50\n" : "not ok 50\n");
print y/ / /s == 8 ? "ok 51\n" : "not ok 51\n";

$_ = 'abcdefghijklmnopqrstuvwxyz0123456789';
tr/a-z/A-Z/;

print $_ eq 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789' ? "ok 52\n" : "not ok 52\n";

# same as tr/A-Z/a-z/;
y[\101-\132][\141-\172];

print $_ eq 'abcdefghijklmnopqrstuvwxyz0123456789' ? "ok 53\n" : "not ok 53\n";

$_ = '+,-';
tr/+--/a-c/;
print $_ eq 'abc' ? "ok 54\n" : "not ok 54\n";

$_ = '+,-';
tr/+\--/a\/c/;
print $_ eq 'a,/' ? "ok 55\n" : "not ok 55\n";

$_ = '+,-';
tr/-+,/ab\-/;
print $_ eq 'b-a' ? "ok 56\n" : "not ok 56\n";


# test recursive substitutions
# code based on the recursive expansion of makefile variables

my %MK = (
    AAAAA => '$(B)', B=>'$(C)', C => 'D',			# long->short
    E     => '$(F)', F=>'p $(G) q', G => 'HHHHH',	# short->long
    DIR => '$(UNDEFINEDNAME)/xxx',
);
sub var { 
    my($var,$level) = @_;
    return "\$($var)" unless exists $MK{$var};
    return exp_vars($MK{$var}, $level+1); # can recurse
}
sub exp_vars { 
    my($str,$level) = @_;
    $str =~ s/\$\((\w+)\)/var($1, $level+1)/ge; # can recurse
    #warn "exp_vars $level = '$str'\n";
    $str;
}

print exp_vars('$(AAAAA)',0)           eq 'D'
	? "ok 57\n" : "not ok 57\n";
print exp_vars('$(E)',0)               eq 'p HHHHH q'
	? "ok 58\n" : "not ok 58\n";
print exp_vars('$(DIR)',0)             eq '$(UNDEFINEDNAME)/xxx'
	? "ok 59\n" : "not ok 59\n";
print exp_vars('foo $(DIR)/yyy bar',0) eq 'foo $(UNDEFINEDNAME)/xxx/yyy bar'
	? "ok 60\n" : "not ok 60\n";

# a match nested in the RHS of a substitution:

$_ = "abcd";
s/(..)/$x = $1, m#.#/eg;
print $x eq "cd" ? "ok 61\n" : "not ok 61\n";

# Subst and lookbehind

$_="ccccc";
s/(?<!x)c/x/g;
print $_ eq "xxxxx" ? "ok 62\n" : "not ok 62 # `$_' ne `xxxxx'\n";

$_="ccccc";
s/(?<!x)(c)/x/g;
print $_ eq "xxxxx" ? "ok 63\n" : "not ok 63 # `$_' ne `xxxxx'\n";

$_="foobbarfoobbar";
s/(?<!r)foobbar/foobar/g;
print $_ eq "foobarfoobbar" ? "ok 64\n" : "not ok 64 # `$_' ne `foobarfoobbar'\n";

$_="foobbarfoobbar";
s/(?<!ar)(foobbar)/foobar/g;
print $_ eq "foobarfoobbar" ? "ok 65\n" : "not ok 65 # `$_' ne `foobarfoobbar'\n";

$_="foobbarfoobbar";
s/(?<!ar)foobbar/foobar/g;
print $_ eq "foobarfoobbar" ? "ok 66\n" : "not ok 66 # `$_' ne `foobarfoobbar'\n";

# check parsing of split subst with comment
eval 's{foo} # this is a comment, not a delimiter
       {bar};';
print @? ? "not ok 67\n" : "ok 67\n";

# check if squashing works at the end of string
$_="baacbaa";
tr/a/b/s;
print $_ eq "bbcbb" ? "ok 68\n" : "not ok 68 # `$_' ne `bbcbb'\n";

# XXX TODO: Most tests above don't test return values of the ops. They should.
$_ = "ab";
print (s/a/b/ == 1 ? "ok 69\n" : "not ok 69\n");
Commit	Line	Data
d9d8d8de LW	1	#!./perl
d9d8d8de LW	2
79072805	3	# $RCSfile: s.t,v $$Revision: 4.1 $$Date: 92/08/07 18:28:22 $
d9d8d8de	4
2216f30a	5	print "1..69\n";
d9d8d8de LW	6
	7	$x = 'foo';
	8	$_ = "x";
	9	s/x/\$x/;
	10	print "#1\t:$_: eq :\$x:\n";
	11	if ($_ eq '$x') {print "ok 1\n";} else {print "not ok 1\n";}
	12
	13	$_ = "x";
	14	s/x/$x/;
	15	print "#2\t:$_: eq :foo:\n";
	16	if ($_ eq 'foo') {print "ok 2\n";} else {print "not ok 2\n";}
	17
	18	$_ = "x";
	19	s/x/\$x $x/;
	20	print "#3\t:$_: eq :\$x foo:\n";
	21	if ($_ eq '$x foo') {print "ok 3\n";} else {print "not ok 3\n";}
	22
	23	$b = 'cd';
79072805	24	($a = 'abcdef') =~ s<(b${b}e)>'\n$1';
d9d8d8de LW	25	print "#4\t:$1: eq :bcde:\n";
	26	print "#4\t:$a: eq :a\\n\$1f:\n";
	27	if ($1 eq 'bcde' && $a eq 'a\n$1f') {print "ok 4\n";} else {print "not ok 4\n";}
	28
	29	$a = 'abacada';
	30	if (($a =~ s/a/x/g) == 4 && $a eq 'xbxcxdx')
	31	{print "ok 5\n";} else {print "not ok 5\n";}
	32
	33	if (($a =~ s/a/y/g) == 0 && $a eq 'xbxcxdx')
	34	{print "ok 6\n";} else {print "not ok 6 $a\n";}
	35
	36	if (($a =~ s/b/y/g) == 1 && $a eq 'xyxcxdx')
	37	{print "ok 7\n";} else {print "not ok 7 $a\n";}
	38
	39	$_ = 'ABACADA';
	40	if (/a/i && s///gi && $_ eq 'BCD') {print "ok 8\n";} else {print "not ok 8 $_\n";}
	41
	42	$_ = '\\' x 4;
	43	if (length($_) == 4) {print "ok 9\n";} else {print "not ok 9\n";}
	44	s/\\/\\\\/g;
	45	if ($_ eq '\\' x 8) {print "ok 10\n";} else {print "not ok 10 $_\n";}
	46
	47	$_ = '\/' x 4;
	48	if (length($_) == 8) {print "ok 11\n";} else {print "not ok 11\n";}
	49	s/\//\/\//g;
	50	if ($_ eq '\\//' x 4) {print "ok 12\n";} else {print "not ok 12\n";}
	51	if (length($_) == 12) {print "ok 13\n";} else {print "not ok 13\n";}
	52
	53	$_ = 'aaaXXXXbbb';
	54	s/^a//;
	55	print $_ eq 'aaXXXXbbb' ? "ok 14\n" : "not ok 14\n";
	56
	57	$_ = 'aaaXXXXbbb';
	58	s/a//;
	59	print $_ eq 'aaXXXXbbb' ? "ok 15\n" : "not ok 15\n";
	60
	61	$_ = 'aaaXXXXbbb';
	62	s/^a/b/;
	63	print $_ eq 'baaXXXXbbb' ? "ok 16\n" : "not ok 16\n";
	64
	65	$_ = 'aaaXXXXbbb';
	66	s/a/b/;
	67	print $_ eq 'baaXXXXbbb' ? "ok 17\n" : "not ok 17\n";
	68
	69	$_ = 'aaaXXXXbbb';
	70	s/aa//;
	71	print $_ eq 'aXXXXbbb' ? "ok 18\n" : "not ok 18\n";
	72
	73	$_ = 'aaaXXXXbbb';
	74	s/aa/b/;
	75	print $_ eq 'baXXXXbbb' ? "ok 19\n" : "not ok 19\n";
	76
	77	$_ = 'aaaXXXXbbb';
	78	s/b$//;
	79	print $_ eq 'aaaXXXXbb' ? "ok 20\n" : "not ok 20\n";
	80
	81	$_ = 'aaaXXXXbbb';
	82	s/b//;
	83	print $_ eq 'aaaXXXXbb' ? "ok 21\n" : "not ok 21\n";
	84
	85	$_ = 'aaaXXXXbbb';
	86	s/bb//;
	87	print $_ eq 'aaaXXXXb' ? "ok 22\n" : "not ok 22\n";
	88
89	$_ = 'aaaXXXXbbb';
90	s/aX/y/;
91	print $_ eq 'aayXXXbbb' ? "ok 23\n" : "not ok 23\n";
92
93	$_ = 'aaaXXXXbbb';
94	s/Xb/z/;
95	print $_ eq 'aaaXXXzbb' ? "ok 24\n" : "not ok 24\n";
96
97	$_ = 'aaaXXXXbbb';
98	s/aaX.*Xbb//;
99	print $_ eq 'ab' ? "ok 25\n" : "not ok 25\n";
100
101	$_ = 'aaaXXXXbbb';
102	s/bb/x/;
103	print $_ eq 'aaaXXXXxb' ? "ok 26\n" : "not ok 26\n";
104
105	# now for some unoptimized versions of the same.
106
107	$_ = 'aaaXXXXbbb';
108	$x ne $x \|\| s/^a//;
109	print $_ eq 'aaXXXXbbb' ? "ok 27\n" : "not ok 27\n";
110
111	$_ = 'aaaXXXXbbb';
112	$x ne $x \|\| s/a//;
113	print $_ eq 'aaXXXXbbb' ? "ok 28\n" : "not ok 28\n";
114
115	$_ = 'aaaXXXXbbb';
116	$x ne $x \|\| s/^a/b/;
117	print $_ eq 'baaXXXXbbb' ? "ok 29\n" : "not ok 29\n";
118
119	$_ = 'aaaXXXXbbb';
120	$x ne $x \|\| s/a/b/;
121	print $_ eq 'baaXXXXbbb' ? "ok 30\n" : "not ok 30\n";
122
123	$_ = 'aaaXXXXbbb';
124	$x ne $x \|\| s/aa//;
125	print $_ eq 'aXXXXbbb' ? "ok 31\n" : "not ok 31\n";
126
127	$_ = 'aaaXXXXbbb';
128	$x ne $x \|\| s/aa/b/;
129	print $_ eq 'baXXXXbbb' ? "ok 32\n" : "not ok 32\n";
130
131	$_ = 'aaaXXXXbbb';
132	$x ne $x \|\| s/b$//;
133	print $_ eq 'aaaXXXXbb' ? "ok 33\n" : "not ok 33\n";
134
135	$_ = 'aaaXXXXbbb';
136	$x ne $x \|\| s/b//;
137	print $_ eq 'aaaXXXXbb' ? "ok 34\n" : "not ok 34\n";
138
139	$_ = 'aaaXXXXbbb';
140	$x ne $x \|\| s/bb//;
141	print $_ eq 'aaaXXXXb' ? "ok 35\n" : "not ok 35\n";
142
143	$_ = 'aaaXXXXbbb';
144	$x ne $x \|\| s/aX/y/;
145	print $_ eq 'aayXXXbbb' ? "ok 36\n" : "not ok 36\n";
146
147	$_ = 'aaaXXXXbbb';
148	$x ne $x \|\| s/Xb/z/;
149	print $_ eq 'aaaXXXzbb' ? "ok 37\n" : "not ok 37\n";
150
151	$_ = 'aaaXXXXbbb';
152	$x ne $x \|\| s/aaX.*Xbb//;
153	print $_ eq 'ab' ? "ok 38\n" : "not ok 38\n";
154
155	$_ = 'aaaXXXXbbb';
156	$x ne $x \|\| s/bb/x/;
157	print $_ eq 'aaaXXXXxb' ? "ok 39\n" : "not ok 39\n";
158
159	$_ = 'abc123xyz';
c277df42	160	s/(\d+)/$1*2/e; # yields 'abc246xyz'
d9d8d8de	161	print $_ eq 'abc246xyz' ? "ok 40\n" : "not ok 40\n";
c277df42	162	s/(\d+)/sprintf("%5d",$1)/e; # yields 'abc 246xyz'
d9d8d8de	163	print $_ eq 'abc 246xyz' ? "ok 41\n" : "not ok 41\n";
c277df42	164	s/(\w)/$1 x 2/eg; # yields 'aabbcc 224466xxyyzz'
d9d8d8de LW	165	print $_ eq 'aabbcc 224466xxyyzz' ? "ok 42\n" : "not ok 42\n";
	166
	167	$_ = "aaaaa";
	168	print y/a/b/ == 5 ? "ok 43\n" : "not ok 43\n";
	169	print y/a/b/ == 0 ? "ok 44\n" : "not ok 44\n";
	170	print y/b// == 5 ? "ok 45\n" : "not ok 45\n";
	171	print y/b/c/s == 5 ? "ok 46\n" : "not ok 46\n";
	172	print y/c// == 1 ? "ok 47\n" : "not ok 47\n";
	173	print y/c//d == 1 ? "ok 48\n" : "not ok 48\n";
	174	print $_ eq "" ? "ok 49\n" : "not ok 49\n";
	175
	176	$_ = "Now is the %#*! time for all good men...";
	177	print (($x=(y/a-zA-Z //cd)) == 7 ? "ok 50\n" : "not ok 50\n");
	178	print y/ / /s == 8 ? "ok 51\n" : "not ok 51\n";
	179
79072805 LW	180	$_ = 'abcdefghijklmnopqrstuvwxyz0123456789';
	181	tr/a-z/A-Z/;
	182
	183	print $_ eq 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789' ? "ok 52\n" : "not ok 52\n";
	184
	185	# same as tr/A-Z/a-z/;
	186	y[\101-\132][\141-\172];
	187
	188	print $_ eq 'abcdefghijklmnopqrstuvwxyz0123456789' ? "ok 53\n" : "not ok 53\n";
	189
	190	$_ = '+,-';
	191	tr/+--/a-c/;
	192	print $_ eq 'abc' ? "ok 54\n" : "not ok 54\n";
	193
	194	$_ = '+,-';
	195	tr/+\--/a\/c/;
	196	print $_ eq 'a,/' ? "ok 55\n" : "not ok 55\n";
	197
	198	$_ = '+,-';
	199	tr/-+,/ab\-/;
	200	print $_ eq 'b-a' ? "ok 56\n" : "not ok 56\n";
843b4603 TB	201
	202
	203	# test recursive substitutions
	204	# code based on the recursive expansion of makefile variables
	205
	206	my %MK = (
	207	AAAAA => '$(B)', B=>'$(C)', C => 'D', # long->short
	208	E => '$(F)', F=>'p $(G) q', G => 'HHHHH', # short->long
	209	DIR => '$(UNDEFINEDNAME)/xxx',
	210	);
	211	sub var {
	212	my($var,$level) = @_;
	213	return "\$($var)" unless exists $MK{$var};
	214	return exp_vars($MK{$var}, $level+1); # can recurse
	215	}
	216	sub exp_vars {
	217	my($str,$level) = @_;
	218	$str =~ s/\$\((\w+)\)/var($1, $level+1)/ge; # can recurse
	219	#warn "exp_vars $level = '$str'\n";
	220	$str;
	221	}
	222
	223	print exp_vars('$(AAAAA)',0) eq 'D'
	224	? "ok 57\n" : "not ok 57\n";
	225	print exp_vars('$(E)',0) eq 'p HHHHH q'
	226	? "ok 58\n" : "not ok 58\n";
	227	print exp_vars('$(DIR)',0) eq '$(UNDEFINEDNAME)/xxx'
	228	? "ok 59\n" : "not ok 59\n";
	229	print exp_vars('foo $(DIR)/yyy bar',0) eq 'foo $(UNDEFINEDNAME)/xxx/yyy bar'
	230	? "ok 60\n" : "not ok 60\n";
	231
3e3baf6d TB	232	# a match nested in the RHS of a substitution:
	233
	234	$_ = "abcd";
c277df42	235	s/(..)/$x = $1, m#.#/eg;
3e3baf6d	236	print $x eq "cd" ? "ok 61\n" : "not ok 61\n";
fb73857a	237
c277df42 IZ	238	# Subst and lookbehind
	239
	240	$_="ccccc";
	241	s/(?<!x)c/x/g;
	242	print $_ eq "xxxxx" ? "ok 62\n" : "not ok 62 # `$_' ne `xxxxx'\n";
	243
	244	$_="ccccc";
	245	s/(?<!x)(c)/x/g;
	246	print $_ eq "xxxxx" ? "ok 63\n" : "not ok 63 # `$_' ne `xxxxx'\n";
	247
	248	$_="foobbarfoobbar";
	249	s/(?<!r)foobbar/foobar/g;
	250	print $_ eq "foobarfoobbar" ? "ok 64\n" : "not ok 64 # `$_' ne `foobarfoobbar'\n";
	251
	252	$_="foobbarfoobbar";
	253	s/(?<!ar)(foobbar)/foobar/g;
	254	print $_ eq "foobarfoobbar" ? "ok 65\n" : "not ok 65 # `$_' ne `foobarfoobbar'\n";
	255
	256	$_="foobbarfoobbar";
	257	s/(?<!ar)foobbar/foobar/g;
	258	print $_ eq "foobarfoobbar" ? "ok 66\n" : "not ok 66 # `$_' ne `foobarfoobbar'\n";
	259
fb73857a	260	# check parsing of split subst with comment
	261	eval 's{foo} # this is a comment, not a delimiter
	262	{bar};';
c277df42	263	print @? ? "not ok 67\n" : "ok 67\n";
f3ea7b5e IH	264
	265	# check if squashing works at the end of string
	266	$_="baacbaa";
	267	tr/a/b/s;
	268	print $_ eq "bbcbb" ? "ok 68\n" : "not ok 68 # `$_' ne `bbcbb'\n";
	269
2216f30a GS	270	# XXX TODO: Most tests above don't test return values of the ops. They should.
	271	$_ = "ab";
	272	print (s/a/b/ == 1 ? "ok 69\n" : "not ok 69\n");