#!./perl
-# $RCSfile: local.t,v $$Revision: 4.1 $$Date: 92/08/07 18:28:04 $
-
-print "1..36\n";
+print "1..78\n";
sub foo {
local($a, $b) = @_;
eval 'local($$e)';
print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 21\n";
-eval 'local(@$e)';
+eval '$e = []; local(@$e)';
print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 22\n";
-eval 'local(%$e)';
+eval '$e = {}; local(%$e)';
print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 23\n";
# Array and hash elements
}
};
print $m == 5 ? "" : "not ", "ok 36\n";
+
+# see if localization works on tied arrays
+{
+ package TA;
+ sub TIEARRAY { bless [], $_[0] }
+ sub STORE { print "# STORE [@_]\n"; $_[0]->[$_[1]] = $_[2] }
+ sub FETCH { my $v = $_[0]->[$_[1]]; print "# FETCH [@_=$v]\n"; $v }
+ sub CLEAR { print "# CLEAR [@_]\n"; @{$_[0]} = (); }
+ sub FETCHSIZE { scalar(@{$_[0]}) }
+ sub SHIFT { shift (@{$_[0]}) }
+ sub EXTEND {}
+}
+
+tie @a, 'TA';
+@a = ('a', 'b', 'c');
+{
+ local($a[1]) = 'foo';
+ local($a[2]) = $a[2];
+ print +($a[1] eq 'foo') ? "" : "not ", "ok 37\n";
+ print +($a[2] eq 'c') ? "" : "not ", "ok 38\n";
+ @a = ();
+}
+print +($a[1] eq 'b') ? "" : "not ", "ok 39\n";
+print +($a[2] eq 'c') ? "" : "not ", "ok 40\n";
+print +(!defined $a[0]) ? "" : "not ", "ok 41\n";
+
+{
+ package TH;
+ sub TIEHASH { bless {}, $_[0] }
+ sub STORE { print "# STORE [@_]\n"; $_[0]->{$_[1]} = $_[2] }
+ sub FETCH { my $v = $_[0]->{$_[1]}; print "# FETCH [@_=$v]\n"; $v }
+ sub EXISTS { print "# EXISTS [@_]\n"; exists $_[0]->{$_[1]}; }
+ sub DELETE { print "# DELETE [@_]\n"; delete $_[0]->{$_[1]}; }
+ sub CLEAR { print "# CLEAR [@_]\n"; %{$_[0]} = (); }
+}
+
+# see if localization works on tied hashes
+tie %h, 'TH';
+%h = ('a' => 1, 'b' => 2, 'c' => 3);
+
+{
+ local($h{'a'}) = 'foo';
+ local($h{'b'}) = $h{'b'};
+ local($h{'y'});
+ local($h{'z'}) = 33;
+ print +($h{'a'} eq 'foo') ? "" : "not ", "ok 42\n";
+ print +($h{'b'} == 2) ? "" : "not ", "ok 43\n";
+ local($h{'c'});
+ delete $h{'c'};
+}
+print +($h{'a'} == 1) ? "" : "not ", "ok 44\n";
+print +($h{'b'} == 2) ? "" : "not ", "ok 45\n";
+print +($h{'c'} == 3) ? "" : "not ", "ok 46\n";
+
+@a = ('a', 'b', 'c');
+{
+ local($a[1]) = "X";
+ shift @a;
+}
+print +($a[0].$a[1] eq "Xb") ? "" : "not ", "ok 47\n";
+
+# now try the same for %SIG
+
+$SIG{TERM} = 'foo';
+$SIG{INT} = \&foo;
+$SIG{__WARN__} = $SIG{INT};
+{
+ local($SIG{TERM}) = $SIG{TERM};
+ local($SIG{INT}) = $SIG{INT};
+ local($SIG{__WARN__}) = $SIG{__WARN__};
+ print +($SIG{TERM} eq 'main::foo') ? "" : "not ", "ok 48\n";
+ print +($SIG{INT} eq \&foo) ? "" : "not ", "ok 49\n";
+ print +($SIG{__WARN__} eq \&foo) ? "" : "not ", "ok 50\n";
+ local($SIG{INT});
+ delete $SIG{__WARN__};
+}
+print +($SIG{TERM} eq 'main::foo') ? "" : "not ", "ok 51\n";
+print +($SIG{INT} eq \&foo) ? "" : "not ", "ok 52\n";
+print +($SIG{__WARN__} eq \&foo) ? "" : "not ", "ok 53\n";
+
+# and for %ENV
+
+$ENV{_X_} = 'a';
+$ENV{_Y_} = 'b';
+$ENV{_Z_} = 'c';
+{
+ local($ENV{_A_});
+ local($ENV{_B_}) = 'foo';
+ local($ENV{_X_}) = 'foo';
+ local($ENV{_Y_}) = $ENV{_Y_};
+ print +($ENV{_X_} eq 'foo') ? "" : "not ", "ok 54\n";
+ print +($ENV{_Y_} eq 'b') ? "" : "not ", "ok 55\n";
+ local($ENV{_Z_});
+ delete $ENV{_Z_};
+}
+print +($ENV{_X_} eq 'a') ? "" : "not ", "ok 56\n";
+print +($ENV{_Y_} eq 'b') ? "" : "not ", "ok 57\n";
+print +($ENV{_Z_} eq 'c') ? "" : "not ", "ok 58\n";
+
+# does implicit localization in foreach skip magic?
+
+$_ = "ok 59,ok 60,";
+my $iter = 0;
+while (/(o.+?),/gc) {
+ print "$1\n";
+ foreach (1..1) { $iter++ }
+ if ($iter > 2) { print "not ok 60\n"; last; }
+}
+
+{
+ package UnderScore;
+ sub TIESCALAR { bless \my $self, shift }
+ sub FETCH { die "read \$_ forbidden" }
+ sub STORE { die "write \$_ forbidden" }
+ tie $_, __PACKAGE__;
+ my $t = 61;
+ my @tests = (
+ "Nesting" => sub { print '#'; for (1..3) { print }
+ print "\n" }, 1,
+ "Reading" => sub { print }, 0,
+ "Matching" => sub { $x = /badness/ }, 0,
+ "Concat" => sub { $_ .= "a" }, 0,
+ "Chop" => sub { chop }, 0,
+ "Filetest" => sub { -x }, 0,
+ "Assignment" => sub { $_ = "Bad" }, 0,
+ # XXX whether next one should fail is debatable
+ "Local \$_" => sub { local $_ = 'ok?'; print }, 0,
+ "for local" => sub { for("#ok?\n"){ print } }, 1,
+ );
+ while ( ($name, $code, $ok) = splice(@tests, 0, 3) ) {
+ print "# Testing $name\n";
+ eval { &$code };
+ print(($ok xor $@) ? "ok $t\n" : "not ok $t\n");
+ ++$t;
+ }
+ untie $_;
+}
+
+{
+ # BUG 20001205.22
+ my %x;
+ $x{a} = 1;
+ { local $x{b} = 1; }
+ print "not " if exists $x{b};
+ print "ok 70\n";
+ { local @x{c,d,e}; }
+ print "not " if exists $x{c};
+ print "ok 71\n";
+}
+
+# these tests should be physically located after tests 46 and 58,
+# but are here instead to avoid renumbering everything.
+
+# local() should preserve the existenceness of tied hashes and %ENV
+print "not " if exists $h{'y'}; print "ok 72\n";
+print "not " if exists $h{'z'}; print "ok 73\n";
+print "not " if exists $ENV{_A_}; print "ok 74\n";
+print "not " if exists $ENV{_B_}; print "ok 75\n";
+
+# local() and readonly magic variables
+
+eval { local $1 = 1 };
+print "not " if $@ !~ /Modification of a read-only value attempted/;
+print "ok 76\n";
+
+eval { for ($1) { local $_ = 1 } };
+print "not " if $@ !~ /Modification of a read-only value attempted/;
+print "ok 77\n";
+
+eval { for ($1) { local $_ = 1 } };
+print "not " if $@;
+print "ok 78\n";
https://perl5.git.perl.org / perl5.git / blobdiff