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handle magic in local correctly
[perl5.git] / t / op / local.t
CommitLineData
a687059c
LW
1#!./perl
2
ac117f44 3print "1..79\n";
a687059c
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4
5sub foo {
6 local($a, $b) = @_;
7 local($c, $d);
8 $c = "ok 3\n";
9 $d = "ok 4\n";
10 { local($a,$c) = ("ok 9\n", "ok 10\n"); ($x, $y) = ($a, $c); }
11 print $a, $b;
12 $c . $d;
13}
14
15$a = "ok 5\n";
16$b = "ok 6\n";
17$c = "ok 7\n";
18$d = "ok 8\n";
19
93a17b20 20print &foo("ok 1\n","ok 2\n");
a687059c
LW
21
22print $a,$b,$c,$d,$x,$y;
23
24# same thing, only with arrays and associative arrays
25
26sub foo2 {
27 local($a, @b) = @_;
28 local(@c, %d);
29 @c = "ok 13\n";
30 $d{''} = "ok 14\n";
31 { local($a,@c) = ("ok 19\n", "ok 20\n"); ($x, $y) = ($a, @c); }
32 print $a, @b;
33 $c[0] . $d{''};
34}
35
36$a = "ok 15\n";
37@b = "ok 16\n";
38@c = "ok 17\n";
39$d{''} = "ok 18\n";
40
93a17b20 41print &foo2("ok 11\n","ok 12\n");
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LW
42
43print $a,@b,@c,%d,$x,$y;
706a304b
SM
44
45eval 'local($$e)';
46print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 21\n";
47
82d03984 48eval '$e = []; local(@$e)';
706a304b
SM
49print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 22\n";
50
82d03984 51eval '$e = {}; local(%$e)';
706a304b 52print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 23\n";
85aff577 53
161b7d16
SM
54# Array and hash elements
55
56@a = ('a', 'b', 'c');
57{
58 local($a[1]) = 'foo';
59 local($a[2]) = $a[2];
2bb40b7f
GS
60 print +($a[1] eq 'foo') ? "" : "not ", "ok 24\n";
61 print +($a[2] eq 'c') ? "" : "not ", "ok 25\n";
161b7d16
SM
62 undef @a;
63}
2bb40b7f
GS
64print +($a[1] eq 'b') ? "" : "not ", "ok 26\n";
65print +($a[2] eq 'c') ? "" : "not ", "ok 27\n";
66print +(!defined $a[0]) ? "" : "not ", "ok 28\n";
161b7d16
SM
67
68@a = ('a', 'b', 'c');
69{
70 local($a[1]) = "X";
71 shift @a;
72}
2bb40b7f 73print +($a[0].$a[1] eq "Xb") ? "" : "not ", "ok 29\n";
161b7d16
SM
74
75%h = ('a' => 1, 'b' => 2, 'c' => 3);
76{
77 local($h{'a'}) = 'foo';
78 local($h{'b'}) = $h{'b'};
2bb40b7f
GS
79 print +($h{'a'} eq 'foo') ? "" : "not ", "ok 30\n";
80 print +($h{'b'} == 2) ? "" : "not ", "ok 31\n";
161b7d16
SM
81 local($h{'c'});
82 delete $h{'c'};
83}
2bb40b7f
GS
84print +($h{'a'} == 1) ? "" : "not ", "ok 32\n";
85print +($h{'b'} == 2) ? "" : "not ", "ok 33\n";
86print +($h{'c'} == 3) ? "" : "not ", "ok 34\n";
87
88# check for scope leakage
89$a = 'outer';
90if (1) { local $a = 'inner' }
91print +($a eq 'outer') ? "" : "not ", "ok 35\n";
92
93# see if localization works when scope unwinds
94local $m = 5;
95eval {
96 for $m (6) {
97 local $m = 7;
98 die "bye";
99 }
100};
101print $m == 5 ? "" : "not ", "ok 36\n";
4e4c362e
GS
102
103# see if localization works on tied arrays
104{
105 package TA;
106 sub TIEARRAY { bless [], $_[0] }
107 sub STORE { print "# STORE [@_]\n"; $_[0]->[$_[1]] = $_[2] }
108 sub FETCH { my $v = $_[0]->[$_[1]]; print "# FETCH [@_=$v]\n"; $v }
109 sub CLEAR { print "# CLEAR [@_]\n"; @{$_[0]} = (); }
110 sub FETCHSIZE { scalar(@{$_[0]}) }
111 sub SHIFT { shift (@{$_[0]}) }
112 sub EXTEND {}
113}
114
115tie @a, 'TA';
116@a = ('a', 'b', 'c');
117{
118 local($a[1]) = 'foo';
be6c24e0 119 local($a[2]) = $a[2];
4e4c362e 120 print +($a[1] eq 'foo') ? "" : "not ", "ok 37\n";
be6c24e0 121 print +($a[2] eq 'c') ? "" : "not ", "ok 38\n";
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GS
122 @a = ();
123}
124print +($a[1] eq 'b') ? "" : "not ", "ok 39\n";
125print +($a[2] eq 'c') ? "" : "not ", "ok 40\n";
126print +(!defined $a[0]) ? "" : "not ", "ok 41\n";
127
128{
129 package TH;
130 sub TIEHASH { bless {}, $_[0] }
131 sub STORE { print "# STORE [@_]\n"; $_[0]->{$_[1]} = $_[2] }
132 sub FETCH { my $v = $_[0]->{$_[1]}; print "# FETCH [@_=$v]\n"; $v }
c39e6ab0 133 sub EXISTS { print "# EXISTS [@_]\n"; exists $_[0]->{$_[1]}; }
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GS
134 sub DELETE { print "# DELETE [@_]\n"; delete $_[0]->{$_[1]}; }
135 sub CLEAR { print "# CLEAR [@_]\n"; %{$_[0]} = (); }
136}
137
138# see if localization works on tied hashes
139tie %h, 'TH';
140%h = ('a' => 1, 'b' => 2, 'c' => 3);
141
142{
143 local($h{'a'}) = 'foo';
be6c24e0 144 local($h{'b'}) = $h{'b'};
159ad915
DM
145 local($h{'y'});
146 local($h{'z'}) = 33;
4e4c362e 147 print +($h{'a'} eq 'foo') ? "" : "not ", "ok 42\n";
be6c24e0 148 print +($h{'b'} == 2) ? "" : "not ", "ok 43\n";
4e4c362e
GS
149 local($h{'c'});
150 delete $h{'c'};
151}
152print +($h{'a'} == 1) ? "" : "not ", "ok 44\n";
153print +($h{'b'} == 2) ? "" : "not ", "ok 45\n";
154print +($h{'c'} == 3) ? "" : "not ", "ok 46\n";
155
156@a = ('a', 'b', 'c');
157{
158 local($a[1]) = "X";
159 shift @a;
160}
161print +($a[0].$a[1] eq "Xb") ? "" : "not ", "ok 47\n";
162
be6c24e0
GS
163# now try the same for %SIG
164
165$SIG{TERM} = 'foo';
166$SIG{INT} = \&foo;
167$SIG{__WARN__} = $SIG{INT};
168{
169 local($SIG{TERM}) = $SIG{TERM};
170 local($SIG{INT}) = $SIG{INT};
171 local($SIG{__WARN__}) = $SIG{__WARN__};
172 print +($SIG{TERM} eq 'main::foo') ? "" : "not ", "ok 48\n";
173 print +($SIG{INT} eq \&foo) ? "" : "not ", "ok 49\n";
174 print +($SIG{__WARN__} eq \&foo) ? "" : "not ", "ok 50\n";
175 local($SIG{INT});
176 delete $SIG{__WARN__};
177}
178print +($SIG{TERM} eq 'main::foo') ? "" : "not ", "ok 51\n";
179print +($SIG{INT} eq \&foo) ? "" : "not ", "ok 52\n";
180print +($SIG{__WARN__} eq \&foo) ? "" : "not ", "ok 53\n";
181
182# and for %ENV
183
184$ENV{_X_} = 'a';
185$ENV{_Y_} = 'b';
186$ENV{_Z_} = 'c';
187{
159ad915
DM
188 local($ENV{_A_});
189 local($ENV{_B_}) = 'foo';
be6c24e0
GS
190 local($ENV{_X_}) = 'foo';
191 local($ENV{_Y_}) = $ENV{_Y_};
192 print +($ENV{_X_} eq 'foo') ? "" : "not ", "ok 54\n";
193 print +($ENV{_Y_} eq 'b') ? "" : "not ", "ok 55\n";
194 local($ENV{_Z_});
195 delete $ENV{_Z_};
196}
197print +($ENV{_X_} eq 'a') ? "" : "not ", "ok 56\n";
198print +($ENV{_Y_} eq 'b') ? "" : "not ", "ok 57\n";
199print +($ENV{_Z_} eq 'c') ? "" : "not ", "ok 58\n";
200
0214ae40
GS
201# does implicit localization in foreach skip magic?
202
203$_ = "ok 59,ok 60,";
204my $iter = 0;
205while (/(o.+?),/gc) {
206 print "$1\n";
207 foreach (1..1) { $iter++ }
208 if ($iter > 2) { print "not ok 60\n"; last; }
209}
210
211{
212 package UnderScore;
213 sub TIESCALAR { bless \my $self, shift }
214 sub FETCH { die "read \$_ forbidden" }
215 sub STORE { die "write \$_ forbidden" }
216 tie $_, __PACKAGE__;
217 my $t = 61;
218 my @tests = (
219 "Nesting" => sub { print '#'; for (1..3) { print }
220 print "\n" }, 1,
221 "Reading" => sub { print }, 0,
222 "Matching" => sub { $x = /badness/ }, 0,
223 "Concat" => sub { $_ .= "a" }, 0,
224 "Chop" => sub { chop }, 0,
225 "Filetest" => sub { -x }, 0,
226 "Assignment" => sub { $_ = "Bad" }, 0,
227 # XXX whether next one should fail is debatable
228 "Local \$_" => sub { local $_ = 'ok?'; print }, 0,
229 "for local" => sub { for("#ok?\n"){ print } }, 1,
230 );
231 while ( ($name, $code, $ok) = splice(@tests, 0, 3) ) {
232 print "# Testing $name\n";
233 eval { &$code };
234 print(($ok xor $@) ? "ok $t\n" : "not ok $t\n");
235 ++$t;
236 }
237 untie $_;
238}
239
1f5346dc
SC
240{
241 # BUG 20001205.22
242 my %x;
243 $x{a} = 1;
244 { local $x{b} = 1; }
245 print "not " if exists $x{b};
246 print "ok 70\n";
247 { local @x{c,d,e}; }
248 print "not " if exists $x{c};
249 print "ok 71\n";
250}
159ad915
DM
251
252# these tests should be physically located after tests 46 and 58,
253# but are here instead to avoid renumbering everything.
254
255# local() should preserve the existenceness of tied hashes and %ENV
256print "not " if exists $h{'y'}; print "ok 72\n";
257print "not " if exists $h{'z'}; print "ok 73\n";
258print "not " if exists $ENV{_A_}; print "ok 74\n";
259print "not " if exists $ENV{_B_}; print "ok 75\n";
33f3c7b8
RGS
260
261# local() and readonly magic variables
262
263eval { local $1 = 1 };
264print "not " if $@ !~ /Modification of a read-only value attempted/;
265print "ok 76\n";
266
267eval { for ($1) { local $_ = 1 } };
268print "not " if $@ !~ /Modification of a read-only value attempted/;
269print "ok 77\n";
270
0cbee0a4 271# make sure $1 is still read-only
33f3c7b8 272eval { for ($1) { local $_ = 1 } };
0cbee0a4 273print "not " if $@ !~ /Modification of a read-only value attempted/;
33f3c7b8 274print "ok 78\n";
ac117f44
RGS
275
276# The s/// adds 'g' magic to $_, but it should remain non-readonly
277eval { for("a") { for $x (1,2) { local $_="b"; s/(.*)/+$1/ } } };
278print "not " if $@;
279print "ok 79\n";