1#!./perl 2 3BEGIN { 4 chdir 't' if -d 't'; 5 @INC = '../lib'; 6} 7 8require './test.pl'; 9plan(tests => 43); 10 11# compile time 12 13is('-' x 5, '-----', 'compile time x'); 14is('-' x 3.1, '---', 'compile time 3.1'); 15is('-' x 3.9, '---', 'compile time 3.9'); 16is('-' x 1, '-', ' x 1'); 17is('-' x 0, '', ' x 0'); 18is('-' x -1, '', ' x -1'); 19is('-' x undef, '', ' x undef'); 20is('-' x "foo", '', ' x "foo"'); 21is('-' x "3rd", '---', ' x "3rd"'); 22 23is('ab' x 3, 'ababab', ' more than one char'); 24 25# run time 26 27$a = '-'; 28is($a x 5, '-----', 'run time x'); 29is($a x 3.1, '---', ' x 3.1'); 30is($a x 3.9, '---', ' x 3.9'); 31is($a x 1, '-', ' x 1'); 32is($a x 0, '', ' x 0'); 33is($a x -3, '', ' x -3'); 34is($a x undef, '', ' x undef'); 35is($a x "foo", '', ' x "foo"'); 36is($a x "3rd", '---', ' x "3rd"'); 37 38$a = 'ab'; 39is($a x 3, 'ababab', ' more than one char'); 40$a = 'ab'; 41is($a x 0, '', ' more than one char'); 42$a = 'ab'; 43is($a x -12, '', ' more than one char'); 44 45$a = 'xyz'; 46$a x= 2; 47is($a, 'xyzxyz', 'x=2'); 48$a x= 1; 49is($a, 'xyzxyz', 'x=1'); 50$a x= 0; 51is($a, '', 'x=0'); 52 53@x = (1,2,3); 54 55is(join('', @x x 4), '3333', '@x x Y'); 56is(join('', (@x) x 4), '123123123123', '(@x) x Y'); 57is(join('', (@x,()) x 4), '123123123123', '(@x,()) x Y'); 58is(join('', (@x,1) x 4), '1231123112311231', '(@x,1) x Y'); 59is(join(':', () x 4), '', '() x Y'); 60is(join(':', (9) x 4), '9:9:9:9', '(X) x Y'); 61is(join(':', (9,9) x 4), '9:9:9:9:9:9:9:9', '(X,X) x Y'); 62is(join('', (split(//,"123")) x 2), '123123', 'split and x'); 63 64is(join('', @x x -12), '', '@x x -12'); 65is(join('', (@x) x -14), '', '(@x) x -14'); 66 67 68# This test is actually testing for Digital C compiler optimizer bug, 69# present in Dec C versions 5.* and 6.0 (used in Digital UNIX and VMS), 70# found in December 1998. The bug was reported to Digital^WCompaq as 71# DECC 2745 (21-Dec-1998) 72# GEM_BUGS 7619 (23-Dec-1998) 73# As of April 1999 the bug has been fixed in Tru64 UNIX 5.0 and is planned 74# to be fixed also in 4.0G. 75# 76# The bug was as follows: broken code was produced for util.c:repeatcpy() 77# (a utility function for the 'x' operator) in the case *all* these 78# four conditions held: 79# 80# (1) len == 1 81# (2) "from" had the 8th bit on in its single character 82# (3) count > 7 (the 'x' count > 16) 83# (4) the highest optimization level was used in compilation 84# (which is the default when compiling Perl) 85# 86# The bug looked like this (. being the eight-bit character and ? being \xff): 87# 88# 16 ................ 89# 17 .........???????. 90# 18 .........???????.. 91# 19 .........???????... 92# 20 .........???????.... 93# 21 .........???????..... 94# 22 .........???????...... 95# 23 .........???????....... 96# 24 .........???????.??????? 97# 25 .........???????.???????. 98# 99# The bug was triggered in the "if (len == 1)" branch. The fix 100# was to introduce a new temporary variable. In diff -u format: 101# 102# register char *frombase = from; 103# 104# if (len == 1) { 105#- todo = *from; 106#+ register char c = *from; 107# while (count-- > 0) 108#- *to++ = todo; 109#+ *to++ = c; 110# return; 111# } 112# 113# The bug could also be (obscurely) avoided by changing "from" to 114# be an unsigned char pointer. 115# 116# This obscure bug was not found by the then test suite but instead 117# by Mark.Martinec@nsc.ijs.si while trying to install Digest-MD5-2.00. 118# 119# jhi@iki.fi 120# 121is("\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'); 122 123 124# When we use a list repeat in a scalar context, it behaves like 125# a scalar repeat. Make sure that works properly, and doesn't leave 126# extraneous values on the stack. 127# -- robin@kitsite.com 128 129my ($x, $y) = scalar ((1,2)x2); 130is($x, "22", 'list repeat in scalar context'); 131is($y, undef, ' no extra values on stack'); 132 133# Make sure the stack doesn't get truncated too much - the left 134# operand of the eq binop needs to remain! 135is(77, scalar ((1,7)x2), 'stack truncation'); 136 137 138# perlbug 20011113.110 works in 5.6.1, broken in 5.7.2 139{ 140 my $x= [("foo") x 2]; 141 is( join('', @$x), 'foofoo', 'list repeat in anon array ref broken [ID 20011113.110]' ); 142} 143 144# [ID 20010809.028] x operator not copying elements in 'for' list? 145{ 146 local $TODO = "x operator not copying elements in 'for' list? [ID 20010809.028]"; 147 my $x = 'abcd'; 148 my $y = ''; 149 for (($x =~ /./g) x 2) { 150 $y .= chop; 151 } 152 is($y, 'abcdabcd'); 153} 154 155# [perl #35885] 156is( (join ',', (qw(a b c) x 3)), 'a,b,c,a,b,c,a,b,c', 'x on qw produces list' ); 157 158# [perl #78194] x aliasing op return values 159sub { 160 is(\$_[0], \$_[1], 161 '[perl #78194] \$_[0] == \$_[1] when @_ aliases elems repeated by x') 162} 163 ->(("${\''}")x2); 164