15 is('-' x 5, '-----', 'compile time x');
16 is('-' x 3.1, '---', 'compile time 3.1');
17 is('-' x 3.9, '---', 'compile time 3.9');
18 is('-' x 1, '-', ' x 1');
19 is('-' x 0, '', ' x 0');
20 is('-' x -1, '', ' x -1');
21 is('-' x undef, '', ' x undef');
22 is('-' x "foo", '', ' x "foo"');
23 is('-' x "3rd", '---', ' x "3rd"');
25 is('ab' x 3, 'ababab', ' more than one char');
30 is($a x 5, '-----', 'run time x');
31 is($a x 3.1, '---', ' x 3.1');
32 is($a x 3.9, '---', ' x 3.9');
33 is($a x 1, '-', ' x 1');
34 is($a x 0, '', ' x 0');
35 is($a x -3, '', ' x -3');
36 is($a x undef, '', ' x undef');
37 is($a x "foo", '', ' x "foo"');
38 is($a x "3rd", '---', ' x "3rd"');
41 is($a x 3, 'ababab', ' more than one char');
43 is($a x 0, '', ' more than one char');
45 is($a x -12, '', ' more than one char');
49 is($a, 'xyzxyz', 'x=2');
51 is($a, 'xyzxyz', 'x=1');
57 is(join('', @x x 4), '3333', '@x x Y');
58 is(join('', (@x) x 4), '123123123123', '(@x) x Y');
59 is(join('', (@x,()) x 4), '123123123123', '(@x,()) x Y');
60 is(join('', (@x,1) x 4), '1231123112311231', '(@x,1) x Y');
61 is(join(':', () x 4), '', '() x Y');
62 is(join(':', (9) x 4), '9:9:9:9', '(X) x Y');
63 is(join(':', (9,9) x 4), '9:9:9:9:9:9:9:9', '(X,X) x Y');
64 is(join('', (split(//,"123")) x 2), '123123', 'split and x');
66 is(join('', @x x -12), '', '@x x -12');
67 is(join('', (@x) x -14), '', '(@x) x -14');
70 # This test is actually testing for Digital C compiler optimizer bug,
71 # present in Dec C versions 5.* and 6.0 (used in Digital UNIX and VMS),
72 # found in December 1998. The bug was reported to Digital^WCompaq as
73 # DECC 2745 (21-Dec-1998)
74 # GEM_BUGS 7619 (23-Dec-1998)
75 # As of April 1999 the bug has been fixed in Tru64 UNIX 5.0 and is planned
76 # to be fixed also in 4.0G.
78 # The bug was as follows: broken code was produced for util.c:repeatcpy()
79 # (a utility function for the 'x' operator) in the case *all* these
80 # four conditions held:
83 # (2) "from" had the 8th bit on in its single character
84 # (3) count > 7 (the 'x' count > 16)
85 # (4) the highest optimization level was used in compilation
86 # (which is the default when compiling Perl)
88 # The bug looked like this (. being the eight-bit character and ? being \xff):
91 # 17 .........???????.
92 # 18 .........???????..
93 # 19 .........???????...
94 # 20 .........???????....
95 # 21 .........???????.....
96 # 22 .........???????......
97 # 23 .........???????.......
98 # 24 .........???????.???????
99 # 25 .........???????.???????.
101 # The bug was triggered in the "if (len == 1)" branch. The fix
102 # was to introduce a new temporary variable. In diff -u format:
104 # register char *frombase = from;
108 #+ register char c = *from;
109 # while (count-- > 0)
115 # The bug could also be (obscurely) avoided by changing "from" to
116 # be an unsigned char pointer.
118 # This obscure bug was not found by the then test suite but instead
119 # by Mark.Martinec@nsc.ijs.si while trying to install Digest-MD5-2.00.
123 is("\xdd" x 24, "\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd", 'Dec C bug');
126 # When we use a list repeat in a scalar context, it behaves like
127 # a scalar repeat. Make sure that works properly, and doesn't leave
128 # extraneous values on the stack.
129 # -- robin@kitsite.com
131 my ($x, $y) = scalar ((1,2)x2);
132 is($x, "22", 'list repeat in scalar context');
133 is($y, undef, ' no extra values on stack');
135 # Make sure the stack doesn't get truncated too much - the left
136 # operand of the eq binop needs to remain!
137 is(77, scalar ((1,7)x2), 'stack truncation');
140 # perlbug 20011113.110 works in 5.6.1, broken in 5.7.2
142 my $x= [("foo") x 2];
143 is( join('', @$x), 'foofoo', 'list repeat in anon array ref broken [ID 20011113.110]' );
146 # [ID 20010809.028] x operator not copying elements in 'for' list?
148 local $TODO = "x operator not copying elements in 'for' list? [ID 20010809.028]";
151 for (($x =~ /./g) x 2) {
157 # Test the "malloc wrappage" guards introduced in Perl 5.8.4.
159 # Note that the guards do not catch everything: for example
160 # "0"x0x7f...f is fine because it will attempt to allocate
161 # "only" 0x7f...f+1 bytes: no wrappage there.
163 if ($Config{ptrsize} == 4) {
164 eval '@a=(0)x0x7fffffff';
165 like($@, qr/Out of memory during list extend/, "list extend");
167 eval '@a=(0)x0x80000000';
168 like($@, qr/Out of memory during list extend/, "list extend");
170 eval '$a="012"x0x7fffffff';
171 like($@, qr/Out of memory during string extend/, "string extend");
173 eval '$a="012"x0x80000000';
174 like($@, qr/Out of memory during string extend/, "string extend");
175 } elsif ($Config{ptrsize} == 8) {
176 eval '@a=(0)x0x7fffffffffffffff';
177 like($@, qr/Out of memory during list extend/, "list extend");
179 eval '@a=(0)x0x8000000000000000';
180 like($@, qr/Out of memory during list extend/, "list extend");
182 eval '$a="012"x0x7fffffffffffffff';
183 like($@, qr/Out of memory during string extend/, "string extend");
185 eval '$a="012"x0x8000000000000000';
186 like($@, qr/Out of memory during string extend/, "string extend");
188 die "\$Config{ptrsize} == $Config{ptrsize}?";