14 { local($a,$c) = ("a 9", "c 10"); ($x, $y) = ($a, $c); }
26 @res = &foo("a 1","b 2");
37 # same thing, only with arrays and associative arrays
44 { local($a,@c) = ("a 19", "c 20"); ($x, $y) = ($a, @c); }
55 @res = &foo2("a 1","b 2");
68 like($@, qr/Can't localize through a reference/);
70 eval '$e = []; local(@$e)';
71 like($@, qr/Can't localize through a reference/);
73 eval '$e = {}; local(%$e)';
74 like($@, qr/Can't localize through a reference/);
76 # Array and hash elements
95 is($a[0].$a[1], "Xb");
97 %h = ('a' => 1, 'b' => 2, 'c' => 3);
99 local($h{'a'}) = 'foo';
100 local($h{'b'}) = $h{'b'};
110 # check for scope leakage
112 if (1) { local $a = 'inner' }
115 # see if localization works when scope unwinds
125 # see if localization works on tied arrays
128 sub TIEARRAY { bless [], $_[0] }
129 sub STORE { print "# STORE [@_]\n"; $_[0]->[$_[1]] = $_[2] }
130 sub FETCH { my $v = $_[0]->[$_[1]]; print "# FETCH [@_=$v]\n"; $v }
131 sub CLEAR { print "# CLEAR [@_]\n"; @{$_[0]} = (); }
132 sub FETCHSIZE { scalar(@{$_[0]}) }
133 sub SHIFT { shift (@{$_[0]}) }
138 @a = ('a', 'b', 'c');
140 local($a[1]) = 'foo';
141 local($a[2]) = $a[2];
152 sub TIEHASH { bless {}, $_[0] }
153 sub STORE { print "# STORE [@_]\n"; $_[0]->{$_[1]} = $_[2] }
154 sub FETCH { my $v = $_[0]->{$_[1]}; print "# FETCH [@_=$v]\n"; $v }
155 sub EXISTS { print "# EXISTS [@_]\n"; exists $_[0]->{$_[1]}; }
156 sub DELETE { print "# DELETE [@_]\n"; delete $_[0]->{$_[1]}; }
157 sub CLEAR { print "# CLEAR [@_]\n"; %{$_[0]} = (); }
160 # see if localization works on tied hashes
162 %h = ('a' => 1, 'b' => 2, 'c' => 3);
165 local($h{'a'}) = 'foo';
166 local($h{'b'}) = $h{'b'};
177 # local() should preserve the existenceness of tied hash elements
178 ok(! exists $h{'y'});
179 ok(! exists $h{'z'});
181 @a = ('a', 'b', 'c');
186 is($a[0].$a[1], "Xb");
188 # now try the same for %SIG
192 $SIG{__WARN__} = $SIG{INT};
194 local($SIG{TERM}) = $SIG{TERM};
195 local($SIG{INT}) = $SIG{INT};
196 local($SIG{__WARN__}) = $SIG{__WARN__};
197 is($SIG{TERM}, 'main::foo');
198 is($SIG{INT}, \&foo);
199 is($SIG{__WARN__}, \&foo);
201 delete $SIG{__WARN__};
203 is($SIG{TERM}, 'main::foo');
204 is($SIG{INT}, \&foo);
205 is($SIG{__WARN__}, \&foo);
214 local($ENV{_B_}) = 'foo';
215 local($ENV{_X_}) = 'foo';
216 local($ENV{_Y_}) = $ENV{_Y_};
217 is($ENV{_X_}, 'foo');
225 # local() should preserve the existenceness of %ENV elements
226 ok(! exists $ENV{_A_});
227 ok(! exists $ENV{_B_});
229 # does implicit localization in foreach skip magic?
233 while (/(o.+?),/gc) {
235 foreach (1..1) { $iter++ }
236 if ($iter > 2) { fail("endless loop"); last; }
241 sub TIESCALAR { bless \my $self, shift }
242 sub FETCH { die "read \$_ forbidden" }
243 sub STORE { die "write \$_ forbidden" }
246 "Nesting" => sub { print '#'; for (1..3) { print }
248 "Reading" => sub { print }, 0,
249 "Matching" => sub { $x = /badness/ }, 0,
250 "Concat" => sub { $_ .= "a" }, 0,
251 "Chop" => sub { chop }, 0,
252 "Filetest" => sub { -x }, 0,
253 "Assignment" => sub { $_ = "Bad" }, 0,
254 # XXX whether next one should fail is debatable
255 "Local \$_" => sub { local $_ = 'ok?'; print }, 0,
256 "for local" => sub { for("#ok?\n"){ print } }, 1,
258 while ( ($name, $code, $ok) = splice(@tests, 0, 3) ) {
260 main::ok(($ok xor $@), "Underscore '$name'");
275 # local() and readonly magic variables
277 eval { local $1 = 1 };
278 like($@, qr/Modification of a read-only value attempted/);
280 eval { for ($1) { local $_ = 1 } };
281 like($@, qr/Modification of a read-only value attempted/);
283 # make sure $1 is still read-only
284 eval { for ($1) { local $_ = 1 } };
285 like($@, qr/Modification of a read-only value attempted/);
287 # The s/// adds 'g' magic to $_, but it should remain non-readonly
288 eval { for("a") { for $x (1,2) { local $_="b"; s/(.*)/+$1/ } } };