8 # This ok() function is specially written to avoid any concatenation.
13 printf "%sok %d - %s\n", ($ok ? "" : "not "), $test, $name;
15 printf "# Failed test at line %d\n", (caller)[2] unless $ok;
23 ($a, $b, $c) = qw(foo bar);
25 ok("$a" eq "foo", "verifying assign");
26 ok("$a$b" eq "foobar", "basic concatenation");
27 ok("$c$a$c" eq "foo", "concatenate undef, fore and aft");
29 # Okay, so that wasn't very challenging. Let's go Unicode.
34 $_ = $dx = "\x{10f2}";
37 ok($_ eq "$dx$dx","bug id 20000819.004, back");
40 $_ = $dx = "\x{10f2}";
43 ok($_ eq "$dx$dx","bug id 20000819.004, front");
47 $_ = "\x{10f2}\x{10f2}";
50 ok($_ eq "$dx$dx","bug id 20000819.004, front and back");
56 # test that undef left and right of utf8 results in a valid string
60 ok($a eq "\x{1ff}", "bug id 20000901.092, undef left");
62 ok($a eq "\x{1ff}", "bug id 20000901.092, undef right");
68 "x" =~ /(.)/; # unset $2
70 # Without the fix this 5.7.0 would croak:
71 # Modification of a read-only value attempted at ...
73 ok(!$@, "bug id 20001020.006, left");
75 # For symmetry with the above.
77 ok(!$@, "bug id 20001020.006, right");
80 # This bug existed earlier than the $2 bug, but is fixed with the same
81 # patch. Without the fix this 5.7.0 would also croak:
82 # Modification of a read-only value attempted at ...
84 ok(!$@, "bug id 20001020.006, constant left");
86 # For symmetry with the above.
88 ok(!$@, "bug id 20001020.006, constant right");
91 sub beq { use bytes; $_[0] eq $_[1]; }
94 # concat should not upgrade its arguments.
97 ($l, $r, $c) = ("\x{101}", "\x{fe}", "\x{101}\x{fe}");
98 ok(beq($l.$r, $c), "concat utf8 and byte");
99 ok(beq($l, "\x{101}"), "right not changed after concat u+b");
100 ok(beq($r, "\x{fe}"), "left not changed after concat u+b");
102 ($l, $r, $c) = ("\x{fe}", "\x{101}", "\x{fe}\x{101}");
103 ok(beq($l.$r, $c), "concat byte and utf8");
104 ok(beq($l, "\x{fe}"), "right not changed after concat b+u");
105 ok(beq($r, "\x{101}"), "left not changed after concat b+u");
109 my $a; ($a .= 5) . 6;
110 ok($a == 5, '($a .= 5) . 6 - present since 5.000');
114 # [perl #24508] optree construction bug
117 $y = ($x = '' . strfoo()) . "y";
118 ok( "$x,$y" eq "x,xy", 'figures out correct target' );
122 # [perl #26905] "use bytes" doesn't apply byte semantics to concatenation
124 my $p = "\xB6"; # PILCROW SIGN (ASCII/EBCDIC), 2bytes in UTF-X
126 my $b = pack 'a*', "\x{100}";
127 my $pu = "\xB6\x{100}";
128 my $up = "\x{100}\xB6";
133 ok(beq($p.$u, $p.$b), "perl #26905, left eq bytes");
134 ok(beq($u.$p, $b.$p), "perl #26905, right eq bytes");
135 ok(!beq($p.$u, $pu), "perl #26905, left ne unicode");
136 ok(!beq($u.$p, $up), "perl #26905, right ne unicode");
144 ok(beq($x1, $x2), "perl #26905, left, .= vs = . in bytes");
145 ok(beq($y1, $y2), "perl #26905, right, .= vs = . in bytes");
146 ok(($x1 eq $x2), "perl #26905, left, .= vs = . in chars");
147 ok(($y1 eq $y2), "perl #26905, right, .= vs = . in chars");
151 # Concatenation needs to preserve UTF8ness of left oper.
152 my $x = eval"qr/\x{fff}/";
153 ok( ord chop($x .= "\303\277") == 191, "UTF8ness preserved" );