Commit | Line | Data |
---|---|---|
a687059c LW |
1 | #!./perl |
2 | ||
e03bd546 JH |
3 | BEGIN { |
4 | chdir 't' if -d 't'; | |
20822f61 | 5 | @INC = '../lib'; |
48f8bad9 | 6 | require './test.pl'; |
e03bd546 JH |
7 | } |
8 | ||
48f8bad9 | 9 | use strict; |
a687059c | 10 | |
48f8bad9 NC |
11 | use vars qw(@ary %ary %hash); |
12 | ||
d47e1c27 | 13 | plan 40; |
48f8bad9 NC |
14 | |
15 | ok !defined($a); | |
a687059c LW |
16 | |
17 | $a = 1+1; | |
48f8bad9 | 18 | ok defined($a); |
a687059c LW |
19 | |
20 | undef $a; | |
48f8bad9 | 21 | ok !defined($a); |
a687059c LW |
22 | |
23 | $a = "hi"; | |
48f8bad9 | 24 | ok defined($a); |
a687059c LW |
25 | |
26 | $a = $b; | |
48f8bad9 | 27 | ok !defined($a); |
a687059c LW |
28 | |
29 | @ary = ("1arg"); | |
30 | $a = pop(@ary); | |
48f8bad9 | 31 | ok defined($a); |
a687059c | 32 | $a = pop(@ary); |
48f8bad9 | 33 | ok !defined($a); |
a687059c LW |
34 | |
35 | @ary = ("1arg"); | |
36 | $a = shift(@ary); | |
48f8bad9 | 37 | ok defined($a); |
a687059c | 38 | $a = shift(@ary); |
48f8bad9 | 39 | ok !defined($a); |
a687059c LW |
40 | |
41 | $ary{'foo'} = 'hi'; | |
48f8bad9 NC |
42 | ok defined($ary{'foo'}); |
43 | ok !defined($ary{'bar'}); | |
a687059c | 44 | undef $ary{'foo'}; |
48f8bad9 | 45 | ok !defined($ary{'foo'}); |
a687059c | 46 | |
48f8bad9 | 47 | ok defined(@ary); |
d47e1c27 NC |
48 | { |
49 | no warnings 'deprecated'; | |
50 | ok defined(%ary); | |
51 | } | |
52 | ok %ary; | |
a687059c | 53 | undef @ary; |
48f8bad9 | 54 | ok !defined(@ary); |
a687059c | 55 | undef %ary; |
d47e1c27 NC |
56 | { |
57 | no warnings 'deprecated'; | |
58 | ok !defined(%ary); | |
59 | } | |
60 | ok !%ary; | |
a687059c | 61 | @ary = (1); |
48f8bad9 | 62 | ok defined @ary; |
a687059c | 63 | %ary = (1,1); |
d47e1c27 NC |
64 | { |
65 | no warnings 'deprecated'; | |
66 | ok defined %ary; | |
67 | } | |
68 | ok %ary; | |
a687059c | 69 | |
48f8bad9 | 70 | sub foo { pass; 1 } |
a687059c | 71 | |
48f8bad9 | 72 | &foo || fail; |
a687059c | 73 | |
48f8bad9 | 74 | ok defined &foo; |
a687059c | 75 | undef &foo; |
48f8bad9 | 76 | ok !defined(&foo); |
a3f914c5 GS |
77 | |
78 | eval { undef $1 }; | |
48f8bad9 | 79 | like $@, qr/^Modification of a read/; |
a3f914c5 GS |
80 | |
81 | eval { $1 = undef }; | |
48f8bad9 | 82 | like $@, qr/^Modification of a read/; |
a3f914c5 | 83 | |
659eaf73 GS |
84 | { |
85 | require Tie::Hash; | |
86 | tie my %foo, 'Tie::StdHash'; | |
140d27a4 | 87 | no warnings 'deprecated'; |
48f8bad9 | 88 | ok defined %foo; |
659eaf73 | 89 | %foo = ( a => 1 ); |
48f8bad9 | 90 | ok defined %foo; |
659eaf73 GS |
91 | } |
92 | ||
93 | { | |
94 | require Tie::Array; | |
95 | tie my @foo, 'Tie::StdArray'; | |
140d27a4 | 96 | no warnings 'deprecated'; |
48f8bad9 | 97 | ok defined @foo; |
659eaf73 | 98 | @foo = ( a => 1 ); |
48f8bad9 | 99 | ok defined @foo; |
659eaf73 | 100 | } |
3d387947 JH |
101 | |
102 | { | |
103 | # [perl #17753] segfault when undef'ing unquoted string constant | |
104 | eval 'undef tcp'; | |
48f8bad9 | 105 | like $@, qr/^Can't modify constant item/; |
3d387947 | 106 | } |
2f86008e DM |
107 | |
108 | # bugid 3096 | |
109 | # undefing a hash may free objects with destructors that then try to | |
110 | # modify the hash. To them, the hash should appear empty. | |
111 | ||
2f86008e DM |
112 | %hash = ( |
113 | key1 => bless({}, 'X'), | |
114 | key2 => bless({}, 'X'), | |
115 | ); | |
116 | undef %hash; | |
117 | sub X::DESTROY { | |
48f8bad9 NC |
118 | is scalar keys %hash, 0; |
119 | is scalar values %hash, 0; | |
120 | my @l = each %hash; | |
121 | is @l, 0; | |
122 | is delete $hash{'key2'}, undef; | |
2f86008e | 123 | } |
6e592b3a BM |
124 | |
125 | # this will segfault if it fails | |
126 | ||
127 | sub PVBM () { 'foo' } | |
128 | { my $dummy = index 'foo', PVBM } | |
129 | ||
130 | my $pvbm = PVBM; | |
131 | undef $pvbm; | |
48f8bad9 | 132 | ok !defined $pvbm; |