1#!./perl 2 3BEGIN { 4 chdir 't' if -d 't'; 5 @INC = '../lib'; 6} 7 8print "1..36\n"; 9 10print defined($a) ? "not ok 1\n" : "ok 1\n"; 11 12$a = 1+1; 13print defined($a) ? "ok 2\n" : "not ok 2\n"; 14 15undef $a; 16print defined($a) ? "not ok 3\n" : "ok 3\n"; 17 18$a = "hi"; 19print defined($a) ? "ok 4\n" : "not ok 4\n"; 20 21$a = $b; 22print defined($a) ? "not ok 5\n" : "ok 5\n"; 23 24@ary = ("1arg"); 25$a = pop(@ary); 26print defined($a) ? "ok 6\n" : "not ok 6\n"; 27$a = pop(@ary); 28print defined($a) ? "not ok 7\n" : "ok 7\n"; 29 30@ary = ("1arg"); 31$a = shift(@ary); 32print defined($a) ? "ok 8\n" : "not ok 8\n"; 33$a = shift(@ary); 34print defined($a) ? "not ok 9\n" : "ok 9\n"; 35 36$ary{'foo'} = 'hi'; 37print defined($ary{'foo'}) ? "ok 10\n" : "not ok 10\n"; 38print defined($ary{'bar'}) ? "not ok 11\n" : "ok 11\n"; 39undef $ary{'foo'}; 40print defined($ary{'foo'}) ? "not ok 12\n" : "ok 12\n"; 41 42print defined(@ary) ? "ok 13\n" : "not ok 13\n"; 43print defined(%ary) ? "ok 14\n" : "not ok 14\n"; 44undef @ary; 45print defined(@ary) ? "not ok 15\n" : "ok 15\n"; 46undef %ary; 47print defined(%ary) ? "not ok 16\n" : "ok 16\n"; 48@ary = (1); 49print defined @ary ? "ok 17\n" : "not ok 17\n"; 50%ary = (1,1); 51print defined %ary ? "ok 18\n" : "not ok 18\n"; 52 53sub foo { print "ok 19\n"; } 54 55&foo || print "not ok 19\n"; 56 57print defined &foo ? "ok 20\n" : "not ok 20\n"; 58undef &foo; 59print defined(&foo) ? "not ok 21\n" : "ok 21\n"; 60 61eval { undef $1 }; 62print $@ =~ /^Modification of a read/ ? "ok 22\n" : "not ok 22\n"; 63 64eval { $1 = undef }; 65print $@ =~ /^Modification of a read/ ? "ok 23\n" : "not ok 23\n"; 66 67{ 68 require Tie::Hash; 69 tie my %foo, 'Tie::StdHash'; 70 print defined %foo ? "ok 24\n" : "not ok 24\n"; 71 %foo = ( a => 1 ); 72 print defined %foo ? "ok 25\n" : "not ok 25\n"; 73} 74 75{ 76 require Tie::Array; 77 tie my @foo, 'Tie::StdArray'; 78 print defined @foo ? "ok 26\n" : "not ok 26\n"; 79 @foo = ( a => 1 ); 80 print defined @foo ? "ok 27\n" : "not ok 27\n"; 81} 82 83{ 84 # [perl #17753] segfault when undef'ing unquoted string constant 85 eval 'undef tcp'; 86 print $@ =~ /^Can't modify constant item/ ? "ok 28\n" : "not ok 28\n"; 87} 88 89# bugid 3096 90# undefing a hash may free objects with destructors that then try to 91# modify the hash. To them, the hash should appear empty. 92 93$test = 29; 94%hash = ( 95 key1 => bless({}, 'X'), 96 key2 => bless({}, 'X'), 97); 98undef %hash; 99sub X::DESTROY { 100 print "not " if keys %hash; print "ok $test\n"; $test++; 101 print "not " if values %hash; print "ok $test\n"; $test++; 102 print "not " if each %hash; print "ok $test\n"; $test++; 103 print "not " if defined delete $hash{'key2'}; print "ok $test\n"; $test++; 104} 105