# tr.t
+use utf8;
+
BEGIN {
chdir 't' if -d 't';
- @INC = '../lib';
+ require './test.pl';
+ set_up_inc('../lib');
}
-print "1..27\n";
+plan tests => 138;
+
+# Test this first before we extend the stack with other operations.
+# This caused an asan failure due to a bad write past the end of the stack.
+eval { my $x; die 1..127, $x =~ y/// };
+
+my $Is_EBCDIC = (ord('i') == 0x89 & ord('J') == 0xd1);
$_ = "abcdefghijklmnopqrstuvwxyz";
tr/a-z/A-Z/;
-print "not " unless $_ eq "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
-print "ok 1\n";
+is($_, "ABCDEFGHIJKLMNOPQRSTUVWXYZ", 'uc');
tr/A-Z/a-z/;
-print "not " unless $_ eq "abcdefghijklmnopqrstuvwxyz";
-print "ok 2\n";
+is($_, "abcdefghijklmnopqrstuvwxyz", 'lc');
tr/b-y/B-Y/;
+is($_, "aBCDEFGHIJKLMNOPQRSTUVWXYz", 'partial uc');
-print "not " unless $_ eq "aBCDEFGHIJKLMNOPQRSTUVWXYz";
-print "ok 3\n";
# In EBCDIC 'I' is \xc9 and 'J' is \0xd1, 'i' is \x89 and 'j' is \x91.
# Yes, discontinuities. Regardless, the \xca in the below should stay
tr/I-J/i-j/;
- print "not " unless $_ eq "i\xcaj";
- print "ok 4\n";
+ is($_, "i\xcaj", 'EBCDIC discontinuity');
}
#
-# make sure that tr cancels IOK and NOK
+
($x = 12) =~ tr/1/3/;
(my $y = 12) =~ tr/1/3/;
($f = 1.5) =~ tr/1/3/;
(my $g = 1.5) =~ tr/1/3/;
-print "not " unless $x + $y + $f + $g == 71;
-print "ok 5\n";
+is($x + $y + $f + $g, 71, 'tr cancels IOK and NOK');
+
+# /r
+$_ = 'adam';
+is y/dam/ve/rd, 'eve', '/r';
+is $_, 'adam', '/r leaves param alone';
+$g = 'ruby';
+is $g =~ y/bury/repl/r, 'perl', '/r with explicit param';
+is $g, 'ruby', '/r leaves explicit param alone';
+is "aaa" =~ y\a\b\r, 'bbb', '/r with constant param';
+ok !eval '$_ !~ y///r', "!~ y///r is forbidden";
+like $@, qr\^Using !~ with tr///r doesn't make sense\,
+ "!~ y///r error message";
+{
+ my $w;
+ my $wc;
+ local $SIG{__WARN__} = sub { $w = shift; ++$wc };
+ local $^W = 1;
+ eval 'y///r; 1';
+ like $w, qr '^Useless use of non-destructive transliteration \(tr///r\)',
+ '/r warns in void context';
+ is $wc, 1, '/r warns just once';
+}
-# make sure tr is harmless if not updating - see [ID 20000511.005]
+# perlbug [ID 20000511.005]
$_ = 'fred';
/([a-z]{2})/;
$1 =~ tr/A-Z//;
s/^(\s*)f/$1F/;
-print "not " if $_ ne 'Fred';
-print "ok 6\n";
+is($_, 'Fred', 'harmless if explicitly not updating');
+
+
+# A variant of the above, added in 5.7.2
+$_ = 'fred';
+/([a-z]{2})/;
+eval '$1 =~ tr/A-Z/A-Z/;';
+s/^(\s*)f/$1F/;
+is($_, 'Fred', 'harmless if implicitly not updating');
+is($@, '', ' no error');
+
# check tr handles UTF8 correctly
($x = 256.65.258) =~ tr/a/b/;
-print "not " if $x ne 256.65.258 or length $x != 3;
-print "ok 7\n";
+is($x, 256.65.258, 'handles UTF8');
+is(length $x, 3);
+
$x =~ tr/A/B/;
+is(length $x, 3);
if (ord("\t") == 9) { # ASCII
- print "not " if $x ne 256.66.258 or length $x != 3;
+ is($x, 256.66.258);
}
else {
- print "not " if $x ne 256.65.258 or length $x != 3;
+ is($x, 256.65.258);
}
-print "ok 8\n";
-{
+# EBCDIC variants of the above tests
+($x = 256.193.258) =~ tr/a/b/;
+is(length $x, 3);
+is($x, 256.193.258);
+
+$x =~ tr/A/B/;
+is(length $x, 3);
if (ord("\t") == 9) { # ASCII
- use utf8;
-}
-
-# 9 - changing UTF8 characters in a UTF8 string, same length.
-$l = chr(300); $r = chr(400);
-$x = 200.300.400;
-$x =~ tr/\x{12c}/\x{190}/;
-printf "not (%vd) ", $x if $x ne 200.400.400 or length $x != 3;
-print "ok 9\n";
-
-# 10 - changing UTF8 characters in UTF8 string, more bytes.
-$x = 200.300.400;
-$x =~ tr/\x{12c}/\x{be8}/;
-printf "not (%vd) ", $x if $x ne 200.3048.400 or length $x != 3;
-print "ok 10\n";
-
-# 11 - introducing UTF8 characters to non-UTF8 string.
-$x = 100.125.60;
-$x =~ tr/\x{64}/\x{190}/;
-printf "not (%vd) ", $x if $x ne 400.125.60 or length $x != 3;
-print "ok 11\n";
-
-# 12 - removing UTF8 characters from UTF8 string
-$x = 400.125.60;
-$x =~ tr/\x{190}/\x{64}/;
-printf "not (%vd) ", $x if $x ne 100.125.60 or length $x != 3;
-print "ok 12\n";
-
-# 13 - counting UTF8 chars in UTF8 string
-$x = 400.125.60.400;
-$y = $x =~ tr/\x{190}/\x{190}/;
-print "not " if $y != 2;
-print "ok 13\n";
-
-# 14 - counting non-UTF8 chars in UTF8 string
-$x = 60.400.125.60.400;
-$y = $x =~ tr/\x{3c}/\x{3c}/;
-print "not " if $y != 2;
-print "ok 14\n";
-
-# 15 - counting UTF8 chars in non-UTF8 string
-$x = 200.125.60;
-$y = $x =~ tr/\x{190}/\x{190}/;
-print "not " if $y != 0;
-print "ok 15\n";
-}
-
-# 16: test brokenness with tr/a-z-9//;
+ is($x, 256.193.258);
+}
+else {
+ is($x, 256.194.258);
+}
+
+
+{
+ my $l = chr(300); my $r = chr(400);
+ $x = 200.300.400;
+ $x =~ tr/\x{12c}/\x{190}/;
+ is($x, 200.400.400,
+ 'changing UTF8 chars in a UTF8 string, same length');
+ is(length $x, 3);
+
+ $x = 200.300.400;
+ $x =~ tr/\x{12c}/\x{be8}/;
+ is($x, 200.3048.400, ' more bytes');
+ is(length $x, 3);
+
+ $x = 100.125.60;
+ $x =~ tr/\x{64}/\x{190}/;
+ is($x, 400.125.60, 'Putting UT8 chars into a non-UTF8 string');
+ is(length $x, 3);
+
+ $x = 400.125.60;
+ $x =~ tr/\x{190}/\x{64}/;
+ is($x, 100.125.60, 'Removing UTF8 chars from UTF8 string');
+ is(length $x, 3);
+
+ $x = 400.125.60.400;
+ $y = $x =~ tr/\x{190}/\x{190}/;
+ is($y, 2, 'Counting UTF8 chars in UTF8 string');
+
+ $x = 60.400.125.60.400;
+ $y = $x =~ tr/\x{3c}/\x{3c}/;
+ is($y, 2, ' non-UTF8 chars in UTF8 string');
+
+ # 17 - counting UTF8 chars in non-UTF8 string
+ $x = 200.125.60;
+ $y = $x =~ tr/\x{190}/\x{190}/;
+ is($y, 0, ' UTF8 chars in non-UTFs string');
+}
+
$_ = "abcdefghijklmnopqrstuvwxyz";
-eval "tr/a-z-9/ /";
-print (($@ =~ /^Ambiguous range in transliteration operator/)
- ? '' : 'not ', "ok 16\n");
+eval 'tr/a-z-9/ /';
+like($@, qr/^Ambiguous range in transliteration operator/, 'tr/a-z-9//');
-# 17-19: Make sure leading and trailing hyphens still work
+# 19-21: Make sure leading and trailing hyphens still work
$_ = "car-rot9";
tr/-a-m/./;
-print (($_ eq '..r.rot9') ? '' : 'not ', "ok 17\n");
+is($_, '..r.rot9', 'hyphens, leading');
$_ = "car-rot9";
tr/a-m-/./;
-print (($_ eq '..r.rot9') ? '' : 'not ', "ok 18\n");
+is($_, '..r.rot9', ' trailing');
$_ = "car-rot9";
tr/-a-m-/./;
-print (($_ eq '..r.rot9') ? '' : 'not ', "ok 19\n");
+is($_, '..r.rot9', ' both');
$_ = "abcdefghijklmnop";
tr/ae-hn/./;
-print (($_ eq '.bcd....ijklm.op') ? '' : 'not ', "ok 20\n");
+is($_, '.bcd....ijklm.op');
$_ = "abcdefghijklmnop";
tr/a-cf-kn-p/./;
-print (($_ eq '...de......lm...') ? '' : 'not ', "ok 21\n");
+is($_, '...de......lm...');
$_ = "abcdefghijklmnop";
tr/a-ceg-ikm-o/./;
-print (($_ eq '...d.f...j.l...p') ? '' : 'not ', "ok 22\n");
+is($_, '...d.f...j.l...p');
+
-# 23: Test reversed range check
# 20000705 MJD
eval "tr/m-d/ /";
-print (($@ =~ /^Invalid \[\] range "m-d" in transliteration operator/)
- ? '' : 'not ', "ok 23\n");
+like($@, qr/^Invalid range "m-d" in transliteration operator/,
+ 'reversed range check');
-# 24: test cannot update if read-only
-eval '$1 =~ tr/x/y/';
-print (($@ =~ /^Modification of a read-only value attempted/) ? '' : 'not ',
- "ok 24\n");
+'abcdef' =~ /(bcd)/;
+is(eval '$1 =~ tr/abcd//', 3, 'explicit read-only count');
+is($@, '', ' no error');
-# 25: test can count read-only
'abcdef' =~ /(bcd)/;
-print (( eval '$1 =~ tr/abcd//' == 3) ? '' : 'not ', "ok 25\n");
+is(eval '$1 =~ tr/abcd/abcd/', 3, 'implicit read-only count');
+is($@, '', ' no error');
+
+is(eval '"123" =~ tr/12//', 2, 'LHS of non-updating tr');
+
+eval '"123" =~ tr/1/2/';
+like($@, qr|^Can't modify constant item in transliteration \(tr///\)|,
+ 'LHS bad on updating tr');
+
+
+# v300 (0x12c) is UTF-8-encoded as 196 172 (0xc4 0xac)
+# v400 (0x190) is UTF-8-encoded as 198 144 (0xc6 0x90)
+
+# Transliterate a byte to a byte, all four ways.
+
+($a = v300.196.172.300.196.172) =~ tr/\xc4/\xc5/;
+is($a, v300.197.172.300.197.172, 'byte2byte transliteration');
+
+($a = v300.196.172.300.196.172) =~ tr/\xc4/\x{c5}/;
+is($a, v300.197.172.300.197.172);
+
+($a = v300.196.172.300.196.172) =~ tr/\x{c4}/\xc5/;
+is($a, v300.197.172.300.197.172);
+
+($a = v300.196.172.300.196.172) =~ tr/\x{c4}/\x{c5}/;
+is($a, v300.197.172.300.197.172);
+
+
+($a = v300.196.172.300.196.172) =~ tr/\xc4/\x{12d}/;
+is($a, v300.301.172.300.301.172, 'byte2wide transliteration');
+
+($a = v300.196.172.300.196.172) =~ tr/\x{12c}/\xc3/;
+is($a, v195.196.172.195.196.172, ' wide2byte');
+
+($a = v300.196.172.300.196.172) =~ tr/\x{12c}/\x{12d}/;
+is($a, v301.196.172.301.196.172, ' wide2wide');
+
+
+($a = v300.196.172.300.196.172) =~ tr/\xc4\x{12c}/\x{12d}\xc3/;
+is($a, v195.301.172.195.301.172, 'byte2wide & wide2byte');
+
+
+($a = v300.196.172.300.196.172.400.198.144) =~
+ tr/\xac\xc4\x{12c}\x{190}/\xad\x{12d}\xc5\x{191}/;
+is($a, v197.301.173.197.301.173.401.198.144, 'all together now!');
+
+
+is((($a = v300.196.172.300.196.172) =~ tr/\xc4/\xc5/), 2,
+ 'transliterate and count');
+
+is((($a = v300.196.172.300.196.172) =~ tr/\x{12c}/\x{12d}/), 2);
+
+
+($a = v300.196.172.300.196.172) =~ tr/\xc4/\x{12d}/c;
+is($a, v301.196.301.301.196.301, 'translit w/complement');
+
+($a = v300.196.172.300.196.172) =~ tr/\x{12c}/\xc5/c;
+is($a, v300.197.197.300.197.197);
+
+
+($a = v300.196.172.300.196.172) =~ tr/\xc4//d;
+is($a, v300.172.300.172, 'translit w/deletion');
+
+($a = v300.196.172.300.196.172) =~ tr/\x{12c}//d;
+is($a, v196.172.196.172);
+
+
+($a = v196.196.172.300.300.196.172) =~ tr/\xc4/\xc5/s;
+is($a, v197.172.300.300.197.172, 'translit w/squeeze');
+
+($a = v196.172.300.300.196.172.172) =~ tr/\x{12c}/\x{12d}/s;
+is($a, v196.172.301.196.172.172);
+
+
+# Tricky cases (When Simon Cozens Attacks)
+($a = v196.172.200) =~ tr/\x{12c}/a/;
+is(sprintf("%vd", $a), '196.172.200');
+
+($a = v196.172.200) =~ tr/\x{12c}/\x{12c}/;
+is(sprintf("%vd", $a), '196.172.200');
+
+($a = v196.172.200) =~ tr/\x{12c}//d;
+is(sprintf("%vd", $a), '196.172.200');
+
+
+# UTF8 range tests from Inaba Hiroto
+
+# Not working in EBCDIC as of 12674.
+($a = v300.196.172.302.197.172) =~ tr/\x{12c}-\x{130}/\xc0-\xc4/;
+is($a, v192.196.172.194.197.172, 'UTF range');
+
+($a = v300.196.172.302.197.172) =~ tr/\xc4-\xc8/\x{12c}-\x{130}/;
+is($a, v300.300.172.302.301.172);
+
+
+# UTF8 range tests from Karsten Sperling (patch #9008 required)
+
+($a = "\x{0100}") =~ tr/\x00-\x{100}/X/;
+is($a, "X");
+
+($a = "\x{0100}") =~ tr/\x{0000}-\x{00ff}/X/c;
+is($a, "X");
+
+($a = "\x{0100}") =~ tr/\x{0000}-\x{00ff}\x{0101}/X/c;
+is($a, "X");
+
+($a = v256) =~ tr/\x{0000}-\x{00ff}\x{0101}/X/c;
+is($a, "X");
+
-# 26: test lhs OK if not updating
-print ((eval '"123" =~ tr/12//' == 2) ? '' : 'not ', "ok 26\n");
+# UTF8 range tests from Inaba Hiroto
-# 27: test lhs bad if updating
-eval '"123" =~ tr/1/1/';
-print (($@ =~ m|^Can't modify constant item in transliteration \(tr///\)|)
- ? '' : 'not ', "ok 27\n");
+($a = "\x{200}") =~ tr/\x00-\x{100}/X/c;
+is($a, "X");
+
+($a = "\x{200}") =~ tr/\x00-\x{100}/X/cs;
+is($a, "X");
+
+# Tricky on EBCDIC: while [a-z] [A-Z] must not match the gap characters (as
+# well as i-j, r-s, I-J, R-S), [\x89-\x91] [\xc9-\xd1] has to match them,
+# from Karsten Sperling.
+
+$c = ($a = "\x89\x8a\x8b\x8c\x8d\x8f\x90\x91") =~ tr/\x89-\x91/X/;
+is($c, 8);
+is($a, "XXXXXXXX");
+
+$c = ($a = "\xc9\xca\xcb\xcc\xcd\xcf\xd0\xd1") =~ tr/\xc9-\xd1/X/;
+is($c, 8);
+is($a, "XXXXXXXX");
+
+SKIP: {
+ skip "not EBCDIC", 4 unless $Is_EBCDIC;
+
+ $c = ($a = "\x89\x8a\x8b\x8c\x8d\x8f\x90\x91") =~ tr/i-j/X/;
+ is($c, 2);
+ is($a, "X\x8a\x8b\x8c\x8d\x8f\x90X");
+
+ $c = ($a = "\xc9\xca\xcb\xcc\xcd\xcf\xd0\xd1") =~ tr/I-J/X/;
+ is($c, 2);
+ is($a, "X\xca\xcb\xcc\xcd\xcf\xd0X");
+}
+
+($a = "\x{100}") =~ tr/\x00-\xff/X/c;
+is(ord($a), ord("X"));
+
+($a = "\x{100}") =~ tr/\x00-\xff/X/cs;
+is(ord($a), ord("X"));
+
+($a = "\x{100}\x{100}") =~ tr/\x{101}-\x{200}//c;
+is($a, "\x{100}\x{100}");
+
+($a = "\x{100}\x{100}") =~ tr/\x{101}-\x{200}//cs;
+is($a, "\x{100}");
+
+$a = "\xfe\xff"; $a =~ tr/\xfe\xff/\x{1ff}\x{1fe}/;
+is($a, "\x{1ff}\x{1fe}");
+
+
+# From David Dyck
+($a = "R0_001") =~ tr/R_//d;
+is(hex($a), 1);
+
+# From Inaba Hiroto
+@a = (1,2); map { y/1/./ for $_ } @a;
+is("@a", ". 2");
+
+@a = (1,2); map { y/1/./ for $_.'' } @a;
+is("@a", "1 2");
+
+
+# Additional test for Inaba Hiroto patch (robin@kitsite.com)
+($a = "\x{100}\x{102}\x{101}") =~ tr/\x00-\377/XYZ/c;
+is($a, "XZY");
+
+
+# Used to fail with "Modification of a read-only value attempted"
+%a = (N=>1);
+foreach (keys %a) {
+ eval 'tr/N/n/';
+ is($_, 'n', 'pp_trans needs to unshare shared hash keys');
+ is($@, '', ' no error');
+}
+
+
+$x = eval '"1213" =~ tr/1/1/';
+is($x, 2, 'implicit count on constant');
+is($@, '', ' no error');
+
+
+my @foo = ();
+eval '$foo[-1] =~ tr/N/N/';
+is( $@, '', 'implicit count outside array bounds, index negative' );
+is( scalar @foo, 0, " doesn't extend the array");
+
+eval '$foo[1] =~ tr/N/N/';
+is( $@, '', 'implicit count outside array bounds, index positive' );
+is( scalar @foo, 0, " doesn't extend the array");
+
+
+my %foo = ();
+eval '$foo{bar} =~ tr/N/N/';
+is( $@, '', 'implicit count outside hash bounds' );
+is( scalar keys %foo, 0, " doesn't extend the hash");
+
+$x = \"foo";
+is( $x =~ tr/A/A/, 2, 'non-modifying tr/// on a scalar ref' );
+is( ref $x, 'SCALAR', " doesn't stringify its argument" );
+
+# rt.perl.org 36622. Perl didn't like a y/// at end of file. No trailing
+# newline allowed.
+fresh_perl_is(q[$_ = "foo"; y/A-Z/a-z/], '');
+
+
+{ # [perl #38293] chr(65535) should be allowed in regexes
+no warnings 'utf8'; # to allow non-characters
+
+$s = "\x{d800}\x{ffff}";
+$s =~ tr/\0/A/;
+is($s, "\x{d800}\x{ffff}", "do_trans_simple");
+
+$s = "\x{d800}\x{ffff}";
+$i = $s =~ tr/\0//;
+is($i, 0, "do_trans_count");
+
+$s = "\x{d800}\x{ffff}";
+$s =~ tr/\0/A/s;
+is($s, "\x{d800}\x{ffff}", "do_trans_complex, SQUASH");
+
+$s = "\x{d800}\x{ffff}";
+$s =~ tr/\0/A/c;
+is($s, "AA", "do_trans_complex, COMPLEMENT");
+
+$s = "A\x{ffff}B";
+$s =~ tr/\x{ffff}/\x{1ffff}/;
+is($s, "A\x{1ffff}B", "utf8, SEARCHLIST");
+
+$s = "\x{fffd}\x{fffe}\x{ffff}";
+$s =~ tr/\x{fffd}-\x{ffff}/ABC/;
+is($s, "ABC", "utf8, SEARCHLIST range");
+
+$s = "ABC";
+$s =~ tr/ABC/\x{ffff}/;
+is($s, "\x{ffff}"x3, "utf8, REPLACEMENTLIST");
+
+$s = "ABC";
+$s =~ tr/ABC/\x{fffd}-\x{ffff}/;
+is($s, "\x{fffd}\x{fffe}\x{ffff}", "utf8, REPLACEMENTLIST range");
+
+$s = "A\x{ffff}B\x{100}\0\x{fffe}\x{ffff}";
+$i = $s =~ tr/\x{ffff}//;
+is($i, 2, "utf8, count");
+
+$s = "A\x{ffff}\x{ffff}C";
+$s =~ tr/\x{ffff}/\x{100}/s;
+is($s, "A\x{100}C", "utf8, SQUASH");
+
+$s = "A\x{ffff}\x{ffff}\x{fffe}\x{fffe}\x{fffe}C";
+$s =~ tr/\x{fffe}\x{ffff}//s;
+is($s, "A\x{ffff}\x{fffe}C", "utf8, SQUASH");
+
+$s = "xAABBBy";
+$s =~ tr/AB/\x{ffff}/s;
+is($s, "x\x{ffff}y", "utf8, SQUASH");
+
+$s = "xAABBBy";
+$s =~ tr/AB/\x{fffe}\x{ffff}/s;
+is($s, "x\x{fffe}\x{ffff}y", "utf8, SQUASH");
+
+$s = "A\x{ffff}B\x{fffe}C";
+$s =~ tr/\x{fffe}\x{ffff}/x/c;
+is($s, "x\x{ffff}x\x{fffe}x", "utf8, COMPLEMENT");
+
+$s = "A\x{10000}B\x{2abcd}C";
+$s =~ tr/\0-\x{ffff}/x/c;
+is($s, "AxBxC", "utf8, COMPLEMENT range");
+
+$s = "A\x{fffe}B\x{ffff}C";
+$s =~ tr/\x{fffe}\x{ffff}/x/d;
+is($s, "AxBC", "utf8, DELETE");
+
+} # non-characters end
+
+{ # related to [perl #27940]
+ my $c;
+
+ ($c = "\x20\c@\x30\cA\x40\cZ\x50\c_\x60") =~ tr/\c@-\c_//d;
+ is($c, "\x20\x30\x40\x50\x60", "tr/\\c\@-\\c_//d");
+
+ ($c = "\x20\x00\x30\x01\x40\x1A\x50\x1F\x60") =~ tr/\x00-\x1f//d;
+ is($c, "\x20\x30\x40\x50\x60", "tr/\\x00-\\x1f//d");
+}
+
+($s) = keys %{{pie => 3}};
+SKIP: {
+ if (!eval { require XS::APItest }) { skip "no XS::APItest", 2 }
+ my $wasro = XS::APItest::SvIsCOW($s);
+ ok $wasro, "have a COW";
+ $s =~ tr/i//;
+ ok( XS::APItest::SvIsCOW($s),
+ "count-only tr doesn't deCOW COWs" );
+}
+
+# [ RT #61520 ]
+#
+# under threads, unicode tr within a cloned closure would SEGV or assert
+# fail, since the pointer in the pad to the swash was getting zeroed out
+# in the proto-CV
+
+{
+ my $x = "\x{142}";
+ sub {
+ $x =~ tr[\x{142}][\x{143}];
+ }->();
+ is($x,"\x{143}", "utf8 + closure");
+}
+
+# Freeing of trans ops prior to pmtrans() [perl #102858].
+eval q{ $a ~= tr/a/b/; };
+ok 1;
+SKIP: {
+ no warnings "deprecated";
+ skip "no encoding", 1 unless eval { require encoding; 1 };
+ eval q{ use encoding "utf8"; $a ~= tr/a/b/; };
+ ok 1;
+}
+
+{ # [perl #113584]
+
+ my $x = "Perlα";
+ $x =~ tr/αα/βγ/;
+ { no warnings 'utf8'; print "# $x\n"; } # No note() to avoid wide warning.
+ is($x, "Perlβ", "Only first of multiple transliterations is used");
+}
+
+# tr/a/b/ should fail even on zero-length read-only strings
+use constant nullrocow => (keys%{{""=>undef}})[0];
+for ("", nullrocow) {
+ eval { $_ =~ y/a/b/ };
+ like $@, qr/^Modification of a read-only value attempted at /,
+ 'tr/a/b/ fails on zero-length ro string';
+}
+
+# Whether they're permitted or not, non-modifying tr/// should not write
+# to read-only values, even with funky flags.
+{ # [perl #123759]
+ eval q{ ('a' =~ /./) =~ tr///d };
+ ok(1, "tr///d on PL_Yes does not assert");
+ eval q{ ('a' =~ /./) =~ tr/a-z/a-z/d };
+ ok(1, "tr/a-z/a-z/d on PL_Yes does not assert");
+ eval q{ ('a' =~ /./) =~ tr///s };
+ ok(1, "tr///s on PL_Yes does not assert");
+ eval q{ *x =~ tr///d };
+ ok(1, "tr///d on glob does not assert");
+}
+1;
https://perl5.git.perl.org / perl5.git / blobdiff