[p5sagit/p5-mst-13.2.git] / t / re / subst.t

#!./perl -w

BEGIN {
    chdir 't' if -d 't';
    @INC = '../lib';
    require Config; import Config;
}

require './test.pl';
plan( tests => 149 );

$x = 'foo';
$_ = "x";
s/x/\$x/;
ok( $_ eq '$x', ":$_: eq :\$x:" );

$_ = "x";
s/x/$x/;
ok( $_ eq 'foo', ":$_: eq :foo:" );

$_ = "x";
s/x/\$x $x/;
ok( $_ eq '$x foo', ":$_: eq :\$x foo:" );

$b = 'cd';
($a = 'abcdef') =~ s<(b${b}e)>'\n$1';
ok( $1 eq 'bcde' && $a eq 'a\n$1f', ":$1: eq :bcde: ; :$a: eq :a\\n\$1f:" );

$a = 'abacada';
ok( ($a =~ s/a/x/g) == 4 && $a eq 'xbxcxdx' );

ok( ($a =~ s/a/y/g) == 0 && $a eq 'xbxcxdx' );

ok( ($a =~ s/b/y/g) == 1 && $a eq 'xyxcxdx' );

$_ = 'ABACADA';
ok( /a/i && s///gi && $_ eq 'BCD' );

$_ = '\\' x 4;
ok( length($_) == 4 );
$snum = s/\\/\\\\/g;
ok( $_ eq '\\' x 8 && $snum == 4 );

$_ = '\/' x 4;
ok( length($_) == 8 );
$snum = s/\//\/\//g;
ok( $_ eq '\\//' x 4 && $snum == 4 );
ok( length($_) == 12 );

$_ = 'aaaXXXXbbb';
s/^a//;
ok( $_ eq 'aaXXXXbbb' );

$_ = 'aaaXXXXbbb';
s/a//;
ok( $_ eq 'aaXXXXbbb' );

$_ = 'aaaXXXXbbb';
s/^a/b/;
ok( $_ eq 'baaXXXXbbb' );

$_ = 'aaaXXXXbbb';
s/a/b/;
ok( $_ eq 'baaXXXXbbb' );

$_ = 'aaaXXXXbbb';
s/aa//;
ok( $_ eq 'aXXXXbbb' );

$_ = 'aaaXXXXbbb';
s/aa/b/;
ok( $_ eq 'baXXXXbbb' );

$_ = 'aaaXXXXbbb';
s/b$//;
ok( $_ eq 'aaaXXXXbb' );

$_ = 'aaaXXXXbbb';
s/b//;
ok( $_ eq 'aaaXXXXbb' );

$_ = 'aaaXXXXbbb';
s/bb//;
ok( $_ eq 'aaaXXXXb' );

$_ = 'aaaXXXXbbb';
s/aX/y/;
ok( $_ eq 'aayXXXbbb' );

$_ = 'aaaXXXXbbb';
s/Xb/z/;
ok( $_ eq 'aaaXXXzbb' );

$_ = 'aaaXXXXbbb';
s/aaX.*Xbb//;
ok( $_ eq 'ab' );

$_ = 'aaaXXXXbbb';
s/bb/x/;
ok( $_ eq 'aaaXXXXxb' );

# now for some unoptimized versions of the same.

$_ = 'aaaXXXXbbb';
$x ne $x || s/^a//;
ok( $_ eq 'aaXXXXbbb' );

$_ = 'aaaXXXXbbb';
$x ne $x || s/a//;
ok( $_ eq 'aaXXXXbbb' );

$_ = 'aaaXXXXbbb';
$x ne $x || s/^a/b/;
ok( $_ eq 'baaXXXXbbb' );

$_ = 'aaaXXXXbbb';
$x ne $x || s/a/b/;
ok( $_ eq 'baaXXXXbbb' );

$_ = 'aaaXXXXbbb';
$x ne $x || s/aa//;
ok( $_ eq 'aXXXXbbb' );

$_ = 'aaaXXXXbbb';
$x ne $x || s/aa/b/;
ok( $_ eq 'baXXXXbbb' );

$_ = 'aaaXXXXbbb';
$x ne $x || s/b$//;
ok( $_ eq 'aaaXXXXbb' );

$_ = 'aaaXXXXbbb';
$x ne $x || s/b//;
ok( $_ eq 'aaaXXXXbb' );

$_ = 'aaaXXXXbbb';
$x ne $x || s/bb//;
ok( $_ eq 'aaaXXXXb' );

$_ = 'aaaXXXXbbb';
$x ne $x || s/aX/y/;
ok( $_ eq 'aayXXXbbb' );

$_ = 'aaaXXXXbbb';
$x ne $x || s/Xb/z/;
ok( $_ eq 'aaaXXXzbb' );

$_ = 'aaaXXXXbbb';
$x ne $x || s/aaX.*Xbb//;
ok( $_ eq 'ab' );

$_ = 'aaaXXXXbbb';
$x ne $x || s/bb/x/;
ok( $_ eq 'aaaXXXXxb' );

$_ = 'abc123xyz';
s/(\d+)/$1*2/e;              # yields 'abc246xyz'
ok( $_ eq 'abc246xyz' );
s/(\d+)/sprintf("%5d",$1)/e; # yields 'abc  246xyz'
ok( $_ eq 'abc  246xyz' );
s/(\w)/$1 x 2/eg;            # yields 'aabbcc  224466xxyyzz'
ok( $_ eq 'aabbcc  224466xxyyzz' );

$_ = "aaaaa";
ok( y/a/b/ == 5 );
ok( y/a/b/ == 0 );
ok( y/b// == 5 );
ok( y/b/c/s == 5 );
ok( y/c// == 1 );
ok( y/c//d == 1 );
ok( $_ eq "" );

$_ = "Now is the %#*! time for all good men...";
ok( ($x=(y/a-zA-Z //cd)) == 7 );
ok( y/ / /s == 8 );

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

ok( $_ eq 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789' );

# same as tr/A-Z/a-z/;
if (defined $Config{ebcdic} && $Config{ebcdic} eq 'define') {	# EBCDIC.
    no utf8;
    y[\301-\351][\201-\251];
} else {		# Ye Olde ASCII.  Or something like it.
    y[\101-\132][\141-\172];
}

ok( $_ eq 'abcdefghijklmnopqrstuvwxyz0123456789' );

SKIP: {
    skip("not ASCII",1) unless (ord("+") == ord(",") - 1
			     && ord(",") == ord("-") - 1
			     && ord("a") == ord("b") - 1
			     && ord("b") == ord("c") - 1);
    $_ = '+,-';
    tr/+--/a-c/;
    ok( $_ eq 'abc' );
}

$_ = '+,-';
tr/+\--/a\/c/;
ok( $_ eq 'a,/' );

$_ = '+,-';
tr/-+,/ab\-/;
ok( $_ eq 'b-a' );


# 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;
}

ok( exp_vars('$(AAAAA)',0)           eq 'D' );
ok( exp_vars('$(E)',0)               eq 'p HHHHH q' );
ok( exp_vars('$(DIR)',0)             eq '$(UNDEFINEDNAME)/xxx' );
ok( exp_vars('foo $(DIR)/yyy bar',0) eq 'foo $(UNDEFINEDNAME)/xxx/yyy bar' );

$_ = "abcd";
s/(..)/$x = $1, m#.#/eg;
ok( $x eq "cd", 'a match nested in the RHS of a substitution' );

# Subst and lookbehind

$_="ccccc";
$snum = s/(?<!x)c/x/g;
ok( $_ eq "xxxxx" && $snum == 5 );

$_="ccccc";
$snum = s/(?<!x)(c)/x/g;
ok( $_ eq "xxxxx" && $snum == 5 );

$_="foobbarfoobbar";
$snum = s/(?<!r)foobbar/foobar/g;
ok( $_ eq "foobarfoobbar" && $snum == 1 );

$_="foobbarfoobbar";
$snum = s/(?<!ar)(foobbar)/foobar/g;
ok( $_ eq "foobarfoobbar" && $snum == 1 );

$_="foobbarfoobbar";
$snum = s/(?<!ar)foobbar/foobar/g;
ok( $_ eq "foobarfoobbar" && $snum == 1 );

eval 's{foo} # this is a comment, not a delimiter
       {bar};';
ok( ! @?, 'parsing of split subst with comment' );

$snum = eval '$_="exactly"; s sxsys;m 3(yactl)3;$1';
is( $snum, 'yactl', 'alpha delimiters are allowed' );

$_="baacbaa";
$snum = tr/a/b/s;
ok( $_ eq "bbcbb" && $snum == 4,
    'check if squashing works at the end of string' );

$_ = "ab";
ok( s/a/b/ == 1 );

$_ = <<'EOL';
     $url = new URI::URL "http://www/";   die if $url eq "xXx";
EOL
$^R = 'junk';

$foo = ' $@%#lowercase $@%# lowercase UPPERCASE$@%#UPPERCASE' .
  ' $@%#lowercase$@%#lowercase$@%# lowercase lowercase $@%#lowercase' .
  ' lowercase $@%#MiXeD$@%# ';

$snum =
s{  \d+          \b [,.;]? (?{ 'digits' })
   |
    [a-z]+       \b [,.;]? (?{ 'lowercase' })
   |
    [A-Z]+       \b [,.;]? (?{ 'UPPERCASE' })
   |
    [A-Z] [a-z]+ \b [,.;]? (?{ 'Capitalized' })
   |
    [A-Za-z]+    \b [,.;]? (?{ 'MiXeD' })
   |
    [A-Za-z0-9]+ \b [,.;]? (?{ 'alphanumeric' })
   |
    \s+                    (?{ ' ' })
   |
    [^A-Za-z0-9\s]+          (?{ '$@%#' })
}{$^R}xg;
ok( $_ eq $foo );
ok( $snum == 31 );

$_ = 'a' x 6;
$snum = s/a(?{})//g;
ok( $_ eq '' && $snum == 6 );

$_ = 'x' x 20; 
$snum = s/(\d*|x)/<$1>/g; 
$foo = '<>' . ('<x><>' x 20) ;
ok( $_ eq $foo && $snum == 41 );

$t = 'aaaaaaaaa'; 

$_ = $t;
pos = 6;
$snum = s/\Ga/xx/g;
ok( $_ eq 'aaaaaaxxxxxx' && $snum == 3 );

$_ = $t;
pos = 6;
$snum = s/\Ga/x/g;
ok( $_ eq 'aaaaaaxxx' && $snum == 3 );

$_ = $t;
pos = 6;
s/\Ga/xx/;
ok( $_ eq 'aaaaaaxxaa' );

$_ = $t;
pos = 6;
s/\Ga/x/;
ok( $_ eq 'aaaaaaxaa' );

$_ = $t;
$snum = s/\Ga/xx/g;
ok( $_ eq 'xxxxxxxxxxxxxxxxxx' && $snum == 9 );

$_ = $t;
$snum = s/\Ga/x/g;
ok( $_ eq 'xxxxxxxxx' && $snum == 9 );

$_ = $t;
s/\Ga/xx/;
ok( $_ eq 'xxaaaaaaaa' );

$_ = $t;
s/\Ga/x/;
ok( $_ eq 'xaaaaaaaa' );

$_ = 'aaaa';
$snum = s/\ba/./g;
ok( $_ eq '.aaa' && $snum == 1 );

eval q% s/a/"b"}/e %;
ok( $@ =~ /Bad evalled substitution/ );
eval q% ($_ = "x") =~ s/(.)/"$1 "/e %;
ok( $_ eq "x " and !length $@ );
$x = $x = 'interp';
eval q% ($_ = "x") =~ s/x(($x)*)/"$1"/e %;
ok( $_ eq '' and !length $@ );

$_ = "C:/";
ok( !s/^([a-z]:)/\u$1/ );

$_ = "Charles Bronson";
$snum = s/\B\w//g;
ok( $_ eq "C B" && $snum == 12 );

{
    use utf8;
    my $s = "H\303\266he";
    my $l = my $r = $s;
    $l =~ s/[^\w]//g;
    $r =~ s/[^\w\.]//g;
    is($l, $r, "use utf8 \\w");
}

my $pv1 = my $pv2  = "Andreas J. K\303\266nig";
$pv1 =~ s/A/\x{100}/;
substr($pv2,0,1) = "\x{100}";
is($pv1, $pv2);

SKIP: {
    skip("EBCDIC", 3) if ord("A") == 193; 

    {   
	# Gregor Chrupala <gregor.chrupala@star-group.net>
	use utf8;
	$a = 'Espa&ntilde;a';
	$a =~ s/&ntilde;/ñ/;
	like($a, qr/ñ/, "use utf8 RHS");
    }

    {
	use utf8;
	$a = 'España España';
	$a =~ s/ñ/&ntilde;/;
	like($a, qr/ñ/, "use utf8 LHS");
    }

    {
	use utf8;
	$a = 'España';
	$a =~ s/ñ/ñ/;
	like($a, qr/ñ/, "use utf8 LHS and RHS");
    }
}

{
    # SADAHIRO Tomoyuki <bqw10602@nifty.com>

    $a = "\x{100}\x{101}";
    $a =~ s/\x{101}/\xFF/;
    like($a, qr/\xFF/);
    is(length($a), 2, "SADAHIRO utf8 s///");

    $a = "\x{100}\x{101}";
    $a =~ s/\x{101}/"\xFF"/e;
    like($a, qr/\xFF/);
    is(length($a), 2);

    $a = "\x{100}\x{101}";
    $a =~ s/\x{101}/\xFF\xFF\xFF/;
    like($a, qr/\xFF\xFF\xFF/);
    is(length($a), 4);

    $a = "\x{100}\x{101}";
    $a =~ s/\x{101}/"\xFF\xFF\xFF"/e;
    like($a, qr/\xFF\xFF\xFF/);
    is(length($a), 4);

    $a = "\xFF\x{101}";
    $a =~ s/\xFF/\x{100}/;
    like($a, qr/\x{100}/);
    is(length($a), 2);

    $a = "\xFF\x{101}";
    $a =~ s/\xFF/"\x{100}"/e;
    like($a, qr/\x{100}/);
    is(length($a), 2);

    $a = "\xFF";
    $a =~ s/\xFF/\x{100}/;
    like($a, qr/\x{100}/);
    is(length($a), 1);

    $a = "\xFF";
    $a =~ s/\xFF/"\x{100}"/e;
    like($a, qr/\x{100}/);
    is(length($a), 1);
}

{
    # subst with mixed utf8/non-utf8 type
    my($ua, $ub, $uc, $ud) = ("\x{101}", "\x{102}", "\x{103}", "\x{104}");
    my($na, $nb) = ("\x{ff}", "\x{fe}");
    my $a = "$ua--$ub";
    my $b;
    ($b = $a) =~ s/--/$na/;
    is($b, "$ua$na$ub", "s///: replace non-utf8 into utf8");
    ($b = $a) =~ s/--/--$na--/;
    is($b, "$ua--$na--$ub", "s///: replace long non-utf8 into utf8");
    ($b = $a) =~ s/--/$uc/;
    is($b, "$ua$uc$ub", "s///: replace utf8 into utf8");
    ($b = $a) =~ s/--/--$uc--/;
    is($b, "$ua--$uc--$ub", "s///: replace long utf8 into utf8");
    $a = "$na--$nb";
    ($b = $a) =~ s/--/$ua/;
    is($b, "$na$ua$nb", "s///: replace utf8 into non-utf8");
    ($b = $a) =~ s/--/--$ua--/;
    is($b, "$na--$ua--$nb", "s///: replace long utf8 into non-utf8");

    # now with utf8 pattern
    $a = "$ua--$ub";
    ($b = $a) =~ s/-($ud)?-/$na/;
    is($b, "$ua$na$ub", "s///: replace non-utf8 into utf8 (utf8 pattern)");
    ($b = $a) =~ s/-($ud)?-/--$na--/;
    is($b, "$ua--$na--$ub", "s///: replace long non-utf8 into utf8 (utf8 pattern)");
    ($b = $a) =~ s/-($ud)?-/$uc/;
    is($b, "$ua$uc$ub", "s///: replace utf8 into utf8 (utf8 pattern)");
    ($b = $a) =~ s/-($ud)?-/--$uc--/;
    is($b, "$ua--$uc--$ub", "s///: replace long utf8 into utf8 (utf8 pattern)");
    $a = "$na--$nb";
    ($b = $a) =~ s/-($ud)?-/$ua/;
    is($b, "$na$ua$nb", "s///: replace utf8 into non-utf8 (utf8 pattern)");
    ($b = $a) =~ s/-($ud)?-/--$ua--/;
    is($b, "$na--$ua--$nb", "s///: replace long utf8 into non-utf8 (utf8 pattern)");
    ($b = $a) =~ s/-($ud)?-/$na/;
    is($b, "$na$na$nb", "s///: replace non-utf8 into non-utf8 (utf8 pattern)");
    ($b = $a) =~ s/-($ud)?-/--$na--/;
    is($b, "$na--$na--$nb", "s///: replace long non-utf8 into non-utf8 (utf8 pattern)");
}

$_ = 'aaaa';
$r = 'x';
$s = s/a(?{})/$r/g;
is("<$_> <$s>", "<xxxx> <4>", "[perl #7806]");

$_ = 'aaaa';
$s = s/a(?{})//g;
is("<$_> <$s>", "<> <4>", "[perl #7806]");

# [perl #19048] Coredump in silly replacement
{
    local $^W = 0;
    $_="abcdef\n";
    s!.!!eg;
    is($_, "\n", "[perl #19048]");
}

# [perl #17757] interaction between saw_ampersand and study
{
    my $f = eval q{ $& };
    $f = "xx";
    study $f;
    $f =~ s/x/y/g;
    is($f, "yy", "[perl #17757]");
}

# [perl #20684] returned a zero count
$_ = "1111";
is(s/(??{1})/2/eg, 4, '#20684 s/// with (??{..}) inside');

# [perl #20682] @- not visible in replacement
$_ = "123";
/(2)/;	# seed @- with something else
s/(1)(2)(3)/$#- (@-)/;
is($_, "3 (0 0 1 2)", '#20682 @- not visible in replacement');

# [perl #20682] $^N not visible in replacement
$_ = "abc";
/(a)/; s/(b)|(c)/-$^N/g;
is($_,'a-b-c','#20682 $^N not visible in replacement');

# [perl #22351] perl bug with 'e' substitution modifier
my $name = "chris";
{
    no warnings 'uninitialized';
    $name =~ s/hr//e;
}
is($name, "cis", q[#22351 bug with 'e' substitution modifier]);


# [perl #34171] $1 didn't honour 'use bytes' in s//e
{
    my $s="\x{100}";
    my $x;
    {
	use bytes;
	$s=~ s/(..)/$x=$1/e
    }
    is(length($x), 2, '[perl #34171]');
}


{ # [perl #27940] perlbug: [\x00-\x1f] works, [\c@-\c_] does not
    my $c;

    ($c = "\x20\c@\x30\cA\x40\cZ\x50\c_\x60") =~ s/[\c@-\c_]//g;
    is($c, "\x20\x30\x40\x50\x60", "s/[\\c\@-\\c_]//g");

    ($c = "\x20\x00\x30\x01\x40\x1A\x50\x1F\x60") =~ s/[\x00-\x1f]//g;
    is($c, "\x20\x30\x40\x50\x60", "s/[\\x00-\\x1f]//g");
}
{
    $_ = "xy";
    no warnings 'uninitialized';
    /(((((((((x)))))))))(z)/;	# clear $10
    s/(((((((((x)))))))))(y)/${10}/;
    is($_,"y","RT#6006: \$_ eq '$_'");
    $_ = "xr";
    s/(((((((((x)))))))))(r)/fooba${10}/;
    is($_,"foobar","RT#6006: \$_ eq '$_'");
}
{
    my $want=("\n" x 11).("B\n" x 11)."B";
    $_="B";
    our $i;
    for $i(1..11){
	s/^.*$/$&/gm;
	$_="\n$_\n$&";
    }
    is($want,$_,"RT#17542");
}

{
    my @tests = ('ABC', "\xA3\xA4\xA5", "\x{410}\x{411}\x{412}");
    foreach (@tests) {
	my $id = ord $_;
	s/./pos/ge;
	is($_, "012", "RT#52104: $id");
    }
}

fresh_perl_is( '$_=q(foo);s/(.)\G//g;print' => 'foo', '[perl #69056] positive GPOS regex segfault' );
fresh_perl_is( '$_="abcef"; s/bc|(.)\G(.)/$1 ? "[$1-$2]" : "XX"/ge; print' => 'aXX[c-e][e-f]f', 'positive GPOS regex substitution failure' );

# [perl #~~~~~] $var =~ s/$qr//e calling get-magic on $_ as well as $var
{
 local *_;
 my $scratch;
 sub qrBug::TIESCALAR { bless[pop], 'qrBug' }
 sub qrBug::FETCH { $scratch .= "[fetching $_[0][0]]"; 'prew' }
 sub qrBug::STORE{}
 tie my $kror, qrBug => '$kror';
 tie $_, qrBug => '$_';
 my $qr = qr/(?:)/;
 $kror =~ s/$qr/""/e;
 is(
   $scratch, '[fetching $kror]',
  'bug: $var =~ s/$qr//e calling get-magic on $_ as well as $var',
 );
}

{ # Bug #41530; replacing non-utf8 with a utf8 causes problems
    my $string = "a\x{a0}a";
    my $sub_string = $string;
    ok(! utf8::is_utf8($sub_string), "Verify that string isn't initially utf8");
    $sub_string =~ s/a/\x{100}/g;
    ok(utf8::is_utf8($sub_string),
                        'Verify replace of non-utf8 with utf8 upgrades to utf8');
    is($sub_string, "\x{100}\x{A0}\x{100}",
                            'Verify #41530 fixed: replace of non-utf8 with utf8');

    my $non_sub_string = $string;
    ok(! utf8::is_utf8($non_sub_string),
                                    "Verify that string isn't initially utf8");
    $non_sub_string =~ s/b/\x{100}/g;
    ok(! utf8::is_utf8($non_sub_string),
            "Verify that failed substitute doesn't change string's utf8ness");
    is($non_sub_string, $string,
                        "Verify that failed substitute doesn't change string");
}
Commit	Line	Data
25aae3a7	1	#!./perl -w
d9d8d8de	2
a1a0e61e	3	BEGIN {
a1a0e61e	4	chdir 't' if -d 't';
20822f61	5	@INC = '../lib';
a1a0e61e	6	require Config; import Config;
a1a0e61e	7	}
344462d3	8
e8ebd21b	9	require './test.pl';
3e462cdc	10	plan( tests => 149 );
d9d8d8de	11
	12	$x = 'foo';
	13	$_ = "x";
	14	s/x/\$x/;
e8ebd21b	15	ok( $_ eq '$x', ":$_: eq :\$x:" );
d9d8d8de	16
	17	$_ = "x";
	18	s/x/$x/;
e8ebd21b	19	ok( $_ eq 'foo', ":$_: eq :foo:" );
d9d8d8de	20
	21	$_ = "x";
	22	s/x/\$x $x/;
e8ebd21b	23	ok( $_ eq '$x foo', ":$_: eq :\$x foo:" );
d9d8d8de	24
d9d8d8de	25	$b = 'cd';
79072805	26	($a = 'abcdef') =~ s<(b${b}e)>'\n$1';
e8ebd21b	27	ok( $1 eq 'bcde' && $a eq 'a\n$1f', ":$1: eq :bcde: ; :$a: eq :a\\n\$1f:" );
d9d8d8de	28
d9d8d8de	29	$a = 'abacada';
e8ebd21b	30	ok( ($a =~ s/a/x/g) == 4 && $a eq 'xbxcxdx' );
d9d8d8de	31
e8ebd21b	32	ok( ($a =~ s/a/y/g) == 0 && $a eq 'xbxcxdx' );
d9d8d8de	33
e8ebd21b	34	ok( ($a =~ s/b/y/g) == 1 && $a eq 'xyxcxdx' );
d9d8d8de	35
d9d8d8de	36	$_ = 'ABACADA';
e8ebd21b	37	ok( /a/i && s///gi && $_ eq 'BCD' );
d9d8d8de	38
d9d8d8de	39	$_ = '\\' x 4;
e8ebd21b	40	ok( length($_) == 4 );
	41	$snum = s/\\/\\\\/g;
	42	ok( $_ eq '\\' x 8 && $snum == 4 );
d9d8d8de	43
d9d8d8de	44	$_ = '\/' x 4;
e8ebd21b	45	ok( length($_) == 8 );
	46	$snum = s/\//\/\//g;
	47	ok( $_ eq '\\//' x 4 && $snum == 4 );
	48	ok( length($_) == 12 );
d9d8d8de	49
	50	$_ = 'aaaXXXXbbb';
	51	s/^a//;
e8ebd21b	52	ok( $_ eq 'aaXXXXbbb' );
d9d8d8de	53
	54	$_ = 'aaaXXXXbbb';
	55	s/a//;
e8ebd21b	56	ok( $_ eq 'aaXXXXbbb' );
d9d8d8de	57
	58	$_ = 'aaaXXXXbbb';
	59	s/^a/b/;
e8ebd21b	60	ok( $_ eq 'baaXXXXbbb' );
d9d8d8de	61
	62	$_ = 'aaaXXXXbbb';
	63	s/a/b/;
e8ebd21b	64	ok( $_ eq 'baaXXXXbbb' );
d9d8d8de	65
	66	$_ = 'aaaXXXXbbb';
	67	s/aa//;
e8ebd21b	68	ok( $_ eq 'aXXXXbbb' );
d9d8d8de	69
	70	$_ = 'aaaXXXXbbb';
	71	s/aa/b/;
e8ebd21b	72	ok( $_ eq 'baXXXXbbb' );
d9d8d8de	73
	74	$_ = 'aaaXXXXbbb';
	75	s/b$//;
e8ebd21b	76	ok( $_ eq 'aaaXXXXbb' );
d9d8d8de	77
	78	$_ = 'aaaXXXXbbb';
	79	s/b//;
e8ebd21b	80	ok( $_ eq 'aaaXXXXbb' );
d9d8d8de	81
	82	$_ = 'aaaXXXXbbb';
	83	s/bb//;
e8ebd21b	84	ok( $_ eq 'aaaXXXXb' );
d9d8d8de	85
	86	$_ = 'aaaXXXXbbb';
	87	s/aX/y/;
e8ebd21b	88	ok( $_ eq 'aayXXXbbb' );
d9d8d8de	89
	90	$_ = 'aaaXXXXbbb';
	91	s/Xb/z/;
e8ebd21b	92	ok( $_ eq 'aaaXXXzbb' );
d9d8d8de	93
	94	$_ = 'aaaXXXXbbb';
	95	s/aaX.*Xbb//;
e8ebd21b	96	ok( $_ eq 'ab' );
d9d8d8de	97
	98	$_ = 'aaaXXXXbbb';
	99	s/bb/x/;
e8ebd21b	100	ok( $_ eq 'aaaXXXXxb' );
d9d8d8de	101
	102	# now for some unoptimized versions of the same.
	103
	104	$_ = 'aaaXXXXbbb';
	105	$x ne $x \|\| s/^a//;
e8ebd21b	106	ok( $_ eq 'aaXXXXbbb' );
d9d8d8de	107
	108	$_ = 'aaaXXXXbbb';
	109	$x ne $x \|\| s/a//;
e8ebd21b	110	ok( $_ eq 'aaXXXXbbb' );
d9d8d8de	111
	112	$_ = 'aaaXXXXbbb';
	113	$x ne $x \|\| s/^a/b/;
e8ebd21b	114	ok( $_ eq 'baaXXXXbbb' );
d9d8d8de	115
	116	$_ = 'aaaXXXXbbb';
	117	$x ne $x \|\| s/a/b/;
e8ebd21b	118	ok( $_ eq 'baaXXXXbbb' );
d9d8d8de	119
	120	$_ = 'aaaXXXXbbb';
	121	$x ne $x \|\| s/aa//;
e8ebd21b	122	ok( $_ eq 'aXXXXbbb' );
d9d8d8de	123
	124	$_ = 'aaaXXXXbbb';
	125	$x ne $x \|\| s/aa/b/;
e8ebd21b	126	ok( $_ eq 'baXXXXbbb' );
d9d8d8de	127
	128	$_ = 'aaaXXXXbbb';
	129	$x ne $x \|\| s/b$//;
e8ebd21b	130	ok( $_ eq 'aaaXXXXbb' );
d9d8d8de	131
	132	$_ = 'aaaXXXXbbb';
	133	$x ne $x \|\| s/b//;
e8ebd21b	134	ok( $_ eq 'aaaXXXXbb' );
d9d8d8de	135
	136	$_ = 'aaaXXXXbbb';
	137	$x ne $x \|\| s/bb//;
e8ebd21b	138	ok( $_ eq 'aaaXXXXb' );
d9d8d8de	139
	140	$_ = 'aaaXXXXbbb';
	141	$x ne $x \|\| s/aX/y/;
e8ebd21b	142	ok( $_ eq 'aayXXXbbb' );
d9d8d8de	143
	144	$_ = 'aaaXXXXbbb';
	145	$x ne $x \|\| s/Xb/z/;
e8ebd21b	146	ok( $_ eq 'aaaXXXzbb' );
d9d8d8de	147
	148	$_ = 'aaaXXXXbbb';
	149	$x ne $x \|\| s/aaX.*Xbb//;
e8ebd21b	150	ok( $_ eq 'ab' );
d9d8d8de	151
	152	$_ = 'aaaXXXXbbb';
	153	$x ne $x \|\| s/bb/x/;
e8ebd21b	154	ok( $_ eq 'aaaXXXXxb' );
d9d8d8de	155
d9d8d8de	156	$_ = 'abc123xyz';
c277df42	157	s/(\d+)/$1*2/e; # yields 'abc246xyz'
e8ebd21b	158	ok( $_ eq 'abc246xyz' );
c277df42	159	s/(\d+)/sprintf("%5d",$1)/e; # yields 'abc 246xyz'
e8ebd21b	160	ok( $_ eq 'abc 246xyz' );
c277df42	161	s/(\w)/$1 x 2/eg; # yields 'aabbcc 224466xxyyzz'
e8ebd21b	162	ok( $_ eq 'aabbcc 224466xxyyzz' );
d9d8d8de	163
d9d8d8de	164	$_ = "aaaaa";
e8ebd21b	165	ok( y/a/b/ == 5 );
	166	ok( y/a/b/ == 0 );
	167	ok( y/b// == 5 );
	168	ok( y/b/c/s == 5 );
	169	ok( y/c// == 1 );
	170	ok( y/c//d == 1 );
	171	ok( $_ eq "" );
d9d8d8de	172
d9d8d8de	173	$_ = "Now is the %#*! time for all good men...";
e8ebd21b	174	ok( ($x=(y/a-zA-Z //cd)) == 7 );
e8ebd21b	175	ok( y/ / /s == 8 );
d9d8d8de	176
79072805	177	$_ = 'abcdefghijklmnopqrstuvwxyz0123456789';
	178	tr/a-z/A-Z/;
	179
e8ebd21b	180	ok( $_ eq 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789' );
79072805	181
79072805	182	# same as tr/A-Z/a-z/;
e8ebd21b	183	if (defined $Config{ebcdic} && $Config{ebcdic} eq 'define') { # EBCDIC.
6e68dac8	184	no utf8;
9d116dd7	185	y[\301-\351][\201-\251];
	186	} else { # Ye Olde ASCII. Or something like it.
	187	y[\101-\132][\141-\172];
	188	}
79072805	189
e8ebd21b	190	ok( $_ eq 'abcdefghijklmnopqrstuvwxyz0123456789' );
79072805	191
e8ebd21b	192	SKIP: {
	193	skip("not ASCII",1) unless (ord("+") == ord(",") - 1
	194	&& ord(",") == ord("-") - 1
	195	&& ord("a") == ord("b") - 1
	196	&& ord("b") == ord("c") - 1);
	197	$_ = '+,-';
	198	tr/+--/a-c/;
	199	ok( $_ eq 'abc' );
9d116dd7	200	}
79072805	201
	202	$_ = '+,-';
	203	tr/+\--/a\/c/;
e8ebd21b	204	ok( $_ eq 'a,/' );
79072805	205
	206	$_ = '+,-';
	207	tr/-+,/ab\-/;
e8ebd21b	208	ok( $_ eq 'b-a' );
843b4603	209
	210
	211	# test recursive substitutions
	212	# code based on the recursive expansion of makefile variables
	213
	214	my %MK = (
	215	AAAAA => '$(B)', B=>'$(C)', C => 'D', # long->short
	216	E => '$(F)', F=>'p $(G) q', G => 'HHHHH', # short->long
	217	DIR => '$(UNDEFINEDNAME)/xxx',
	218	);
	219	sub var {
	220	my($var,$level) = @_;
	221	return "\$($var)" unless exists $MK{$var};
	222	return exp_vars($MK{$var}, $level+1); # can recurse
	223	}
	224	sub exp_vars {
	225	my($str,$level) = @_;
	226	$str =~ s/\$\((\w+)\)/var($1, $level+1)/ge; # can recurse
	227	#warn "exp_vars $level = '$str'\n";
	228	$str;
	229	}
	230
e8ebd21b	231	ok( exp_vars('$(AAAAA)',0) eq 'D' );
	232	ok( exp_vars('$(E)',0) eq 'p HHHHH q' );
	233	ok( exp_vars('$(DIR)',0) eq '$(UNDEFINEDNAME)/xxx' );
	234	ok( exp_vars('foo $(DIR)/yyy bar',0) eq 'foo $(UNDEFINEDNAME)/xxx/yyy bar' );
3e3baf6d	235
3e3baf6d	236	$_ = "abcd";
c277df42	237	s/(..)/$x = $1, m#.#/eg;
e8ebd21b	238	ok( $x eq "cd", 'a match nested in the RHS of a substitution' );
fb73857a	239
c277df42	240	# Subst and lookbehind
	241
	242	$_="ccccc";
e8ebd21b	243	$snum = s/(?<!x)c/x/g;
e8ebd21b	244	ok( $_ eq "xxxxx" && $snum == 5 );
c277df42	245
c277df42	246	$_="ccccc";
e8ebd21b	247	$snum = s/(?<!x)(c)/x/g;
e8ebd21b	248	ok( $_ eq "xxxxx" && $snum == 5 );
c277df42	249
c277df42	250	$_="foobbarfoobbar";
e8ebd21b	251	$snum = s/(?<!r)foobbar/foobar/g;
e8ebd21b	252	ok( $_ eq "foobarfoobbar" && $snum == 1 );
c277df42	253
c277df42	254	$_="foobbarfoobbar";
e8ebd21b	255	$snum = s/(?<!ar)(foobbar)/foobar/g;
e8ebd21b	256	ok( $_ eq "foobarfoobbar" && $snum == 1 );
c277df42	257
c277df42	258	$_="foobbarfoobbar";
e8ebd21b	259	$snum = s/(?<!ar)foobbar/foobar/g;
e8ebd21b	260	ok( $_ eq "foobarfoobbar" && $snum == 1 );
c277df42	261
fb73857a	262	eval 's{foo} # this is a comment, not a delimiter
fb73857a	263	{bar};';
e8ebd21b	264	ok( ! @?, 'parsing of split subst with comment' );
f3ea7b5e	265
ed02a3bf	266	$snum = eval '$_="exactly"; s sxsys;m 3(yactl)3;$1';
	267	is( $snum, 'yactl', 'alpha delimiters are allowed' );
	268
f3ea7b5e	269	$_="baacbaa";
e8ebd21b	270	$snum = tr/a/b/s;
	271	ok( $_ eq "bbcbb" && $snum == 4,
	272	'check if squashing works at the end of string' );
f3ea7b5e	273
2216f30a	274	$_ = "ab";
e8ebd21b	275	ok( s/a/b/ == 1 );
ce862d02	276
	277	$_ = <<'EOL';
	278	$url = new URI::URL "http://www/"; die if $url eq "xXx";
	279	EOL
	280	$^R = 'junk';
	281
	282	$foo = ' $@%#lowercase $@%# lowercase UPPERCASE$@%#UPPERCASE' .
	283	' $@%#lowercase$@%#lowercase$@%# lowercase lowercase $@%#lowercase' .
	284	' lowercase $@%#MiXeD$@%# ';
	285
e8ebd21b	286	$snum =
ce862d02	287	s{ \d+ \b [,.;]? (?{ 'digits' })
	288	\|
	289	[a-z]+ \b [,.;]? (?{ 'lowercase' })
	290	\|
	291	[A-Z]+ \b [,.;]? (?{ 'UPPERCASE' })
	292	\|
	293	[A-Z] [a-z]+ \b [,.;]? (?{ 'Capitalized' })
	294	\|
	295	[A-Za-z]+ \b [,.;]? (?{ 'MiXeD' })
	296	\|
	297	[A-Za-z0-9]+ \b [,.;]? (?{ 'alphanumeric' })
	298	\|
	299	\s+ (?{ ' ' })
	300	\|
	301	[^A-Za-z0-9\s]+ (?{ '$@%#' })
	302	}{$^R}xg;
e8ebd21b	303	ok( $_ eq $foo );
8e5e9ebe	304	ok( $snum == 31 );
	305
	306	$_ = 'a' x 6;
	307	$snum = s/a(?{})//g;
	308	ok( $_ eq '' && $snum == 6 );
ce862d02	309
2beec16e	310	$_ = 'x' x 20;
e8ebd21b	311	$snum = s/(\d*\|x)/<$1>/g;
2beec16e	312	$foo = '<>' . ('<x><>' x 20) ;
e8ebd21b	313	ok( $_ eq $foo && $snum == 41 );
ad94a511	314
	315	$t = 'aaaaaaaaa';
	316
	317	$_ = $t;
	318	pos = 6;
e8ebd21b	319	$snum = s/\Ga/xx/g;
e8ebd21b	320	ok( $_ eq 'aaaaaaxxxxxx' && $snum == 3 );
ad94a511	321
	322	$_ = $t;
	323	pos = 6;
e8ebd21b	324	$snum = s/\Ga/x/g;
e8ebd21b	325	ok( $_ eq 'aaaaaaxxx' && $snum == 3 );
ad94a511	326
	327	$_ = $t;
	328	pos = 6;
	329	s/\Ga/xx/;
e8ebd21b	330	ok( $_ eq 'aaaaaaxxaa' );
ad94a511	331
	332	$_ = $t;
	333	pos = 6;
	334	s/\Ga/x/;
e8ebd21b	335	ok( $_ eq 'aaaaaaxaa' );
ad94a511	336
ad94a511	337	$_ = $t;
e8ebd21b	338	$snum = s/\Ga/xx/g;
e8ebd21b	339	ok( $_ eq 'xxxxxxxxxxxxxxxxxx' && $snum == 9 );
ad94a511	340
ad94a511	341	$_ = $t;
e8ebd21b	342	$snum = s/\Ga/x/g;
e8ebd21b	343	ok( $_ eq 'xxxxxxxxx' && $snum == 9 );
ad94a511	344
	345	$_ = $t;
	346	s/\Ga/xx/;
e8ebd21b	347	ok( $_ eq 'xxaaaaaaaa' );
ad94a511	348
	349	$_ = $t;
	350	s/\Ga/x/;
e8ebd21b	351	ok( $_ eq 'xaaaaaaaa' );
ad94a511	352
f5c9036e	353	$_ = 'aaaa';
e8ebd21b	354	$snum = s/\ba/./g;
e8ebd21b	355	ok( $_ eq '.aaa' && $snum == 1 );
ad94a511	356
e9fa98b2	357	eval q% s/a/"b"}/e %;
e8ebd21b	358	ok( $@ =~ /Bad evalled substitution/ );
e9fa98b2	359	eval q% ($_ = "x") =~ s/(.)/"$1 "/e %;
e8ebd21b	360	ok( $_ eq "x " and !length $@ );
43a16006	361	$x = $x = 'interp';
43a16006	362	eval q% ($_ = "x") =~ s/x(($x)*)/"$1"/e %;
e8ebd21b	363	ok( $_ eq '' and !length $@ );
e9fa98b2	364
653099ff	365	$_ = "C:/";
e8ebd21b	366	ok( !s/^([a-z]:)/\u$1/ );
e9fa98b2	367
12d33761	368	$_ = "Charles Bronson";
e8ebd21b	369	$snum = s/\B\w//g;
e8ebd21b	370	ok( $_ eq "C B" && $snum == 12 );
5b71a6a7	371
	372	{
	373	use utf8;
	374	my $s = "H\303\266he";
	375	my $l = my $r = $s;
	376	$l =~ s/[^\w]//g;
	377	$r =~ s/[^\w\.]//g;
aefe6dfc	378	is($l, $r, "use utf8 \\w");
5b71a6a7	379	}
89afcb60	380
	381	my $pv1 = my $pv2 = "Andreas J. K\303\266nig";
	382	$pv1 =~ s/A/\x{100}/;
	383	substr($pv2,0,1) = "\x{100}";
	384	is($pv1, $pv2);
aefe6dfc	385
8e9639e9	386	SKIP: {
	387	skip("EBCDIC", 3) if ord("A") == 193;
	388
	389	{
	390	# Gregor Chrupala <gregor.chrupala@star-group.net>
	391	use utf8;
	392	$a = 'España';
	393	$a =~ s/ñ/ñ/;
	394	like($a, qr/ñ/, "use utf8 RHS");
	395	}
	396
	397	{
	398	use utf8;
	399	$a = 'España España';
	400	$a =~ s/ñ/ñ/;
	401	like($a, qr/ñ/, "use utf8 LHS");
	402	}
	403
	404	{
	405	use utf8;
	406	$a = 'España';
	407	$a =~ s/ñ/ñ/;
	408	like($a, qr/ñ/, "use utf8 LHS and RHS");
	409	}
aefe6dfc	410	}
aefe6dfc	411
8514a05a	412	{
	413	# SADAHIRO Tomoyuki <bqw10602@nifty.com>
	414
	415	$a = "\x{100}\x{101}";
	416	$a =~ s/\x{101}/\xFF/;
	417	like($a, qr/\xFF/);
4a176938	418	is(length($a), 2, "SADAHIRO utf8 s///");
8514a05a	419
	420	$a = "\x{100}\x{101}";
	421	$a =~ s/\x{101}/"\xFF"/e;
	422	like($a, qr/\xFF/);
	423	is(length($a), 2);
	424
	425	$a = "\x{100}\x{101}";
	426	$a =~ s/\x{101}/\xFF\xFF\xFF/;
	427	like($a, qr/\xFF\xFF\xFF/);
	428	is(length($a), 4);
	429
	430	$a = "\x{100}\x{101}";
	431	$a =~ s/\x{101}/"\xFF\xFF\xFF"/e;
	432	like($a, qr/\xFF\xFF\xFF/);
	433	is(length($a), 4);
	434
	435	$a = "\xFF\x{101}";
	436	$a =~ s/\xFF/\x{100}/;
	437	like($a, qr/\x{100}/);
	438	is(length($a), 2);
	439
	440	$a = "\xFF\x{101}";
	441	$a =~ s/\xFF/"\x{100}"/e;
	442	like($a, qr/\x{100}/);
	443	is(length($a), 2);
	444
	445	$a = "\xFF";
	446	$a =~ s/\xFF/\x{100}/;
	447	like($a, qr/\x{100}/);
	448	is(length($a), 1);
	449
	450	$a = "\xFF";
	451	$a =~ s/\xFF/"\x{100}"/e;
	452	like($a, qr/\x{100}/);
	453	is(length($a), 1);
	454	}
d6d0e86e	455
	456	{
	457	# subst with mixed utf8/non-utf8 type
	458	my($ua, $ub, $uc, $ud) = ("\x{101}", "\x{102}", "\x{103}", "\x{104}");
	459	my($na, $nb) = ("\x{ff}", "\x{fe}");
	460	my $a = "$ua--$ub";
	461	my $b;
	462	($b = $a) =~ s/--/$na/;
	463	is($b, "$ua$na$ub", "s///: replace non-utf8 into utf8");
	464	($b = $a) =~ s/--/--$na--/;
	465	is($b, "$ua--$na--$ub", "s///: replace long non-utf8 into utf8");
	466	($b = $a) =~ s/--/$uc/;
	467	is($b, "$ua$uc$ub", "s///: replace utf8 into utf8");
	468	($b = $a) =~ s/--/--$uc--/;
	469	is($b, "$ua--$uc--$ub", "s///: replace long utf8 into utf8");
	470	$a = "$na--$nb";
	471	($b = $a) =~ s/--/$ua/;
	472	is($b, "$na$ua$nb", "s///: replace utf8 into non-utf8");
	473	($b = $a) =~ s/--/--$ua--/;
	474	is($b, "$na--$ua--$nb", "s///: replace long utf8 into non-utf8");
	475
	476	# now with utf8 pattern
	477	$a = "$ua--$ub";
	478	($b = $a) =~ s/-($ud)?-/$na/;
	479	is($b, "$ua$na$ub", "s///: replace non-utf8 into utf8 (utf8 pattern)");
	480	($b = $a) =~ s/-($ud)?-/--$na--/;
	481	is($b, "$ua--$na--$ub", "s///: replace long non-utf8 into utf8 (utf8 pattern)");
	482	($b = $a) =~ s/-($ud)?-/$uc/;
	483	is($b, "$ua$uc$ub", "s///: replace utf8 into utf8 (utf8 pattern)");
	484	($b = $a) =~ s/-($ud)?-/--$uc--/;
	485	is($b, "$ua--$uc--$ub", "s///: replace long utf8 into utf8 (utf8 pattern)");
	486	$a = "$na--$nb";
	487	($b = $a) =~ s/-($ud)?-/$ua/;
	488	is($b, "$na$ua$nb", "s///: replace utf8 into non-utf8 (utf8 pattern)");
	489	($b = $a) =~ s/-($ud)?-/--$ua--/;
	490	is($b, "$na--$ua--$nb", "s///: replace long utf8 into non-utf8 (utf8 pattern)");
	491	($b = $a) =~ s/-($ud)?-/$na/;
	492	is($b, "$na$na$nb", "s///: replace non-utf8 into non-utf8 (utf8 pattern)");
	493	($b = $a) =~ s/-($ud)?-/--$na--/;
	494	is($b, "$na--$na--$nb", "s///: replace long non-utf8 into non-utf8 (utf8 pattern)");
	495	}
	496
6c8d78fb	497	$_ = 'aaaa';
	498	$r = 'x';
	499	$s = s/a(?{})/$r/g;
f14c76ed	500	is("<$_> <$s>", "<xxxx> <4>", "[perl #7806]");
6c8d78fb	501
	502	$_ = 'aaaa';
	503	$s = s/a(?{})//g;
f14c76ed	504	is("<$_> <$s>", "<> <4>", "[perl #7806]");
6c8d78fb	505
f14c76ed	506	# [perl #19048] Coredump in silly replacement
	507	{
	508	local $^W = 0;
	509	$_="abcdef\n";
	510	s!.!!eg;
	511	is($_, "\n", "[perl #19048]");
	512	}
	513
4addbd3b	514	# [perl #17757] interaction between saw_ampersand and study
	515	{
	516	my $f = eval q{ $& };
	517	$f = "xx";
	518	study $f;
	519	$f =~ s/x/y/g;
	520	is($f, "yy", "[perl #17757]");
	521	}
22e13caa	522
	523	# [perl #20684] returned a zero count
	524	$_ = "1111";
	525	is(s/(??{1})/2/eg, 4, '#20684 s/// with (??{..}) inside');
	526
83b43d92	527	# [perl #20682] @- not visible in replacement
	528	$_ = "123";
	529	/(2)/; # seed @- with something else
	530	s/(1)(2)(3)/$#- (@-)/;
	531	is($_, "3 (0 0 1 2)", '#20682 @- not visible in replacement');
	532
76ec6486	533	# [perl #20682] $^N not visible in replacement
	534	$_ = "abc";
	535	/(a)/; s/(b)\|(c)/-$^N/g;
	536	is($_,'a-b-c','#20682 $^N not visible in replacement');
7357df17	537
	538	# [perl #22351] perl bug with 'e' substitution modifier
	539	my $name = "chris";
	540	{
	541	no warnings 'uninitialized';
	542	$name =~ s/hr//e;
	543	}
	544	is($name, "cis", q[#22351 bug with 'e' substitution modifier]);
01b35787	545
	546
	547	# [perl #34171] $1 didn't honour 'use bytes' in s//e
	548	{
	549	my $s="\x{100}";
	550	my $x;
	551	{
	552	use bytes;
	553	$s=~ s/(..)/$x=$1/e
	554	}
	555	is(length($x), 2, '[perl #34171]');
	556	}
	557
	558
1749ea0d	559	{ # [perl #27940] perlbug: [\x00-\x1f] works, [\c@-\c_] does not
	560	my $c;
	561
	562	($c = "\x20\c@\x30\cA\x40\cZ\x50\c_\x60") =~ s/[\c@-\c_]//g;
	563	is($c, "\x20\x30\x40\x50\x60", "s/[\\c\@-\\c_]//g");
	564
	565	($c = "\x20\x00\x30\x01\x40\x1A\x50\x1F\x60") =~ s/[\x00-\x1f]//g;
	566	is($c, "\x20\x30\x40\x50\x60", "s/[\\x00-\\x1f]//g");
	567	}
3be69782	568	{
f0852a51	569	$_ = "xy";
	570	no warnings 'uninitialized';
	571	/(((((((((x)))))))))(z)/; # clear $10
	572	s/(((((((((x)))))))))(y)/${10}/;
	573	is($_,"y","RT#6006: \$_ eq '$_'");
3be69782	574	$_ = "xr";
	575	s/(((((((((x)))))))))(r)/fooba${10}/;
	576	is($_,"foobar","RT#6006: \$_ eq '$_'");
f0852a51	577	}
336b1602	578	{
	579	my $want=("\n" x 11).("B\n" x 11)."B";
	580	$_="B";
	581	our $i;
	582	for $i(1..11){
	583	s/^.*$/$&/gm;
	584	$_="\n$_\n$&";
	585	}
	586	is($want,$_,"RT#17542");
	587	}
1749ea0d	588
ce474962	589	{
	590	my @tests = ('ABC', "\xA3\xA4\xA5", "\x{410}\x{411}\x{412}");
	591	foreach (@tests) {
	592	my $id = ord $_;
	593	s/./pos/ge;
	594	is($_, "012", "RT#52104: $id");
	595	}
	596	}
831a7dd7	597
831a7dd7	598	fresh_perl_is( '$_=q(foo);s/(.)\G//g;print' => 'foo', '[perl #69056] positive GPOS regex segfault' );
2c296965	599	fresh_perl_is( '$_="abcef"; s/bc\|(.)\G(.)/$1 ? "[$1-$2]" : "XX"/ge; print' => 'aXX[c-e][e-f]f', 'positive GPOS regex substitution failure' );
831a7dd7	600
455d9033	601	# [perl #~~~~~] $var =~ s/$qr//e calling get-magic on $_ as well as $var
	602	{
	603	local *_;
	604	my $scratch;
	605	sub qrBug::TIESCALAR { bless[pop], 'qrBug' }
	606	sub qrBug::FETCH { $scratch .= "[fetching $_[0][0]]"; 'prew' }
	607	sub qrBug::STORE{}
	608	tie my $kror, qrBug => '$kror';
	609	tie $_, qrBug => '$_';
	610	my $qr = qr/(?:)/;
	611	$kror =~ s/$qr/""/e;
	612	is(
	613	$scratch, '[fetching $kror]',
	614	'bug: $var =~ s/$qr//e calling get-magic on $_ as well as $var',
	615	);
	616	}
3e462cdc	617
	618	{ # Bug #41530; replacing non-utf8 with a utf8 causes problems
	619	my $string = "a\x{a0}a";
	620	my $sub_string = $string;
	621	ok(! utf8::is_utf8($sub_string), "Verify that string isn't initially utf8");
	622	$sub_string =~ s/a/\x{100}/g;
	623	ok(utf8::is_utf8($sub_string),
	624	'Verify replace of non-utf8 with utf8 upgrades to utf8');
	625	is($sub_string, "\x{100}\x{A0}\x{100}",
	626	'Verify #41530 fixed: replace of non-utf8 with utf8');
	627
	628	my $non_sub_string = $string;
	629	ok(! utf8::is_utf8($non_sub_string),
	630	"Verify that string isn't initially utf8");
	631	$non_sub_string =~ s/b/\x{100}/g;
	632	ok(! utf8::is_utf8($non_sub_string),
	633	"Verify that failed substitute doesn't change string's utf8ness");
	634	is($non_sub_string, $string,
	635	"Verify that failed substitute doesn't change string");
	636	}