1#!./perl 2 3BEGIN { 4 chdir 't' if -d 't'; 5 @INC = '../lib'; 6} 7 8require './test.pl'; 9plan(tests => 48); 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($a, '', 'x=0'); 52 53@x = (1,2,3); 54 55is(join('', @x x 4), '3333', '@x x Y'); 56is(join('', (@x) x 4), '123123123123', '(@x) x Y'); 57is(join('', (@x,()) x 4), '123123123123', '(@x,()) x Y'); 58is(join('', (@x,1) x 4), '1231123112311231', '(@x,1) x Y'); 59is(join(':', () x 4), '', '() x Y'); 60is(join(':', (9) x 4), '9:9:9:9', '(X) x Y'); 61is(join(':', (9,9) x 4), '9:9:9:9:9:9:9:9', '(X,X) x Y'); 62is(join('', (split(//,"123")) x 2), '123123', 'split and x'); 63 64is(join('', @x x -12), '', '@x x -12'); 65is(join('', (@x) x -14), '', '(@x) x -14'); 66 67($a, (undef)x5, $b) = 1..10; 68is ("$a $b", "1 7", '(undef)xCONST on lhs of list assignment'); 69(($a)x3,$b) = 1..10; 70is ("$a, $b", "3, 4", '($x)xCONST on lhs of list assignment'); 71($a, (undef)x${\6}, $b) = "a".."z"; 72is ("$a$b", "ah", '(undef)x$foo on lhs of list assignment'); 73 74 75# This test is actually testing for Digital C compiler optimizer bug, 76# present in Dec C versions 5.* and 6.0 (used in Digital UNIX and VMS), 77# found in December 1998. The bug was reported to Digital^WCompaq as 78# DECC 2745 (21-Dec-1998) 79# GEM_BUGS 7619 (23-Dec-1998) 80# As of April 1999 the bug has been fixed in Tru64 UNIX 5.0 and is planned 81# to be fixed also in 4.0G. 82# 83# The bug was as follows: broken code was produced for util.c:repeatcpy() 84# (a utility function for the 'x' operator) in the case *all* these 85# four conditions held: 86# 87# (1) len == 1 88# (2) "from" had the 8th bit on in its single character 89# (3) count > 7 (the 'x' count > 16) 90# (4) the highest optimization level was used in compilation 91# (which is the default when compiling Perl) 92# 93# The bug looked like this (. being the eight-bit character and ? being \xff): 94# 95# 16 ................ 96# 17 .........???????. 97# 18 .........???????.. 98# 19 .........???????... 99# 20 .........???????.... 100# 21 .........???????..... 101# 22 .........???????...... 102# 23 .........???????....... 103# 24 .........???????.??????? 104# 25 .........???????.???????. 105# 106# The bug was triggered in the "if (len == 1)" branch. The fix 107# was to introduce a new temporary variable. In diff -u format: 108# 109# register char *frombase = from; 110# 111# if (len == 1) { 112#- todo = *from; 113#+ register char c = *from; 114# while (count-- > 0) 115#- *to++ = todo; 116#+ *to++ = c; 117# return; 118# } 119# 120# The bug could also be (obscurely) avoided by changing "from" to 121# be an unsigned char pointer. 122# 123# This obscure bug was not found by the then test suite but instead 124# by Mark.Martinec@nsc.ijs.si while trying to install Digest-MD5-2.00. 125# 126# jhi@iki.fi 127# 128is("\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'); 129 130 131# When we use a list repeat in a scalar context, it behaves like 132# a scalar repeat. Make sure that works properly, and doesn't leave 133# extraneous values on the stack. 134# -- robin@kitsite.com 135 136my ($x, $y) = scalar ((1,2)x2); 137is($x, "22", 'list repeat in scalar context'); 138is($y, undef, ' no extra values on stack'); 139 140# Make sure the stack doesn't get truncated too much - the first 141# argument to is() needs to remain! 142is(77, scalar ((1,7)x2), 'stack truncation'); 143 144# ( )x in void context should not read preceding stack items 145package Tiecount { 146 sub TIESCALAR { bless[]} sub FETCH { our $Tiecount++; study; 3 } 147} 148sub nil {} 149tie my $t, "Tiecount"; 150{ push my @temp, $t, scalar((nil) x 3, 1) } 151is($Tiecount::Tiecount, 1, 152 '(...)x... in void context in list (via scalar comma)'); 153 154 155# perlbug 20011113.110 works in 5.6.1, broken in 5.7.2 156{ 157 my $x= [("foo") x 2]; 158 is( join('', @$x), 'foofoo', 'list repeat in anon array ref broken [ID 20011113.110]' ); 159} 160 161# [perl #35885] 162is( (join ',', (qw(a b c) x 3)), 'a,b,c,a,b,c,a,b,c', 'x on qw produces list' ); 163 164# [perl #78194] x aliasing op return values 165sub { 166 is(\$_[0], \$_[1], 167 '[perl #78194] \$_[0] == \$_[1] when @_ aliases elems repeated by x') 168} 169 ->(("${\''}")x2); 170 171$#that_array = 7; 172for(($#that_array)x2) { 173 $_ *= 2; 174} 175is($#that_array, 28, 'list repetition propagates lvalue cx to its lhs'); 176 177# [perl #126309] huge list counts should give an error 178 179 180fresh_perl_like( 181 '@a = (1) x ~1', 182 qr/Out of memory/, 183 { }, 184 '(1) x ~1', 185); 186