13 is('-' x 5, '-----', 'compile time x');
14 is('-' x 1, '-', ' x 1');
15 is('-' x 0, '', ' x 0');
16 is('-' x -1, '', ' x -1');
17 is('-' x undef, '', ' x undef');
19 is('ab' x 3, 'ababab', ' more than one char');
24 is($a x 5, '-----', 'run time x');
25 is($a x 1, '-', ' x 1');
26 is($a x 0, '', ' x 0');
27 is($a x -3, '', ' x -3');
28 is($a x undef, '', ' x undef');
31 is($a x 3, 'ababab', ' more than one char');
33 is($a x 0, '', ' more than one char');
35 is($a x -12, '', ' more than one char');
39 is($a, 'xyzxyz', 'x=2');
41 is($a, 'xyzxyz', 'x=1');
47 is(join('', @x x 4), '3333', '@x x Y');
48 is(join('', (@x) x 4), '123123123123', '(@x) x Y');
49 is(join('', (@x,()) x 4), '123123123123', '(@x,()) x Y');
50 is(join('', (@x,1) x 4), '1231123112311231', '(@x,1) x Y');
51 is(join(':', () x 4), '', '() x Y');
52 is(join(':', (9) x 4), '9:9:9:9', '(X) x Y');
53 is(join(':', (9,9) x 4), '9:9:9:9:9:9:9:9', '(X,X) x Y');
54 is(join('', (split(//,"123")) x 2), '123123', 'split and x');
56 is(join('', @x x -12), '', '@x x -12');
57 is(join('', (@x) x -14), '', '(@x) x -14');
60 # This test is actually testing for Digital C compiler optimizer bug,
61 # present in Dec C versions 5.* and 6.0 (used in Digital UNIX and VMS),
62 # found in December 1998. The bug was reported to Digital^WCompaq as
63 # DECC 2745 (21-Dec-1998)
64 # GEM_BUGS 7619 (23-Dec-1998)
65 # As of April 1999 the bug has been fixed in Tru64 UNIX 5.0 and is planned
66 # to be fixed also in 4.0G.
68 # The bug was as follows: broken code was produced for util.c:repeatcpy()
69 # (a utility function for the 'x' operator) in the case *all* these
70 # four conditions held:
73 # (2) "from" had the 8th bit on in its single character
74 # (3) count > 7 (the 'x' count > 16)
75 # (4) the highest optimization level was used in compilation
76 # (which is the default when compiling Perl)
78 # The bug looked like this (. being the eight-bit character and ? being \xff):
81 # 17 .........???????.
82 # 18 .........???????..
83 # 19 .........???????...
84 # 20 .........???????....
85 # 21 .........???????.....
86 # 22 .........???????......
87 # 23 .........???????.......
88 # 24 .........???????.???????
89 # 25 .........???????.???????.
91 # The bug was triggered in the "if (len == 1)" branch. The fix
92 # was to introduce a new temporary variable. In diff -u format:
94 # register char *frombase = from;
98 #+ register char c = *from;
105 # The bug could also be (obscurely) avoided by changing "from" to
106 # be an unsigned char pointer.
108 # This obscure bug was not found by the then test suite but instead
109 # by Mark.Martinec@nsc.ijs.si while trying to install Digest-MD5-2.00.
113 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');
116 # When we use a list repeat in a scalar context, it behaves like
117 # a scalar repeat. Make sure that works properly, and doesn't leave
118 # extraneous values on the stack.
119 # -- robin@kitsite.com
121 my ($x, $y) = scalar ((1,2)x2);
122 is($x, "22", 'list repeat in scalar context');
123 is($y, undef, ' no extra values on stack');
125 # Make sure the stack doesn't get truncated too much - the left
126 # operand of the eq binop needs to remain!
127 is(77, scalar ((1,7)x2), 'stack truncation');
130 # perlbug 20011113.110 works in 5.6.1, broken in 5.7.2
132 my $x= [("foo") x 2];
133 is( join('', @$x), 'foofoo', 'list repeat in anon array ref broken [ID 20011113.110]' );
136 # [ID 20010809.028] x operator not copying elements in 'for' list?
138 local $TODO = "x operator not copying elements in 'for' list? [ID 20010809.028]";
141 for (($x =~ /./g) x 2) {