#!./perl
-# $RCSfile: local.t,v $$Revision: 4.1 $$Date: 92/08/07 18:28:04 $
+BEGIN {
+ chdir 't' if -d 't';
+ @INC = qw(. ../lib);
+ require './test.pl';
+}
+plan tests => 122;
+
+my $list_assignment_supported = 1;
+
+#mg.c says list assignment not supported on VMS, EPOC, and SYMBIAN.
+$list_assignment_supported = 0 if ($^O eq 'VMS');
-print "1..24\n";
sub foo {
local($a, $b) = @_;
local($c, $d);
- $c = "ok 3\n";
- $d = "ok 4\n";
- { local($a,$c) = ("ok 9\n", "ok 10\n"); ($x, $y) = ($a, $c); }
- print $a, $b;
- $c . $d;
+ $c = "c 3";
+ $d = "d 4";
+ { local($a,$c) = ("a 9", "c 10"); ($x, $y) = ($a, $c); }
+ is($a, "a 1");
+ is($b, "b 2");
+ $c, $d;
}
-$a = "ok 5\n";
-$b = "ok 6\n";
-$c = "ok 7\n";
-$d = "ok 8\n";
+$a = "a 5";
+$b = "b 6";
+$c = "c 7";
+$d = "d 8";
-print &foo("ok 1\n","ok 2\n");
+my @res;
+@res = &foo("a 1","b 2");
+is($res[0], "c 3");
+is($res[1], "d 4");
-print $a,$b,$c,$d,$x,$y;
+is($a, "a 5");
+is($b, "b 6");
+is($c, "c 7");
+is($d, "d 8");
+is($x, "a 9");
+is($y, "c 10");
# same thing, only with arrays and associative arrays
sub foo2 {
local($a, @b) = @_;
local(@c, %d);
- @c = "ok 13\n";
- $d{''} = "ok 14\n";
- { local($a,@c) = ("ok 19\n", "ok 20\n"); ($x, $y) = ($a, @c); }
- print $a, @b;
- $c[0] . $d{''};
+ @c = "c 3";
+ $d{''} = "d 4";
+ { local($a,@c) = ("a 19", "c 20"); ($x, $y) = ($a, @c); }
+ is($a, "a 1");
+ is("@b", "b 2");
+ $c[0], $d{''};
}
-$a = "ok 15\n";
-@b = "ok 16\n";
-@c = "ok 17\n";
-$d{''} = "ok 18\n";
+$a = "a 5";
+@b = "b 6";
+@c = "c 7";
+$d{''} = "d 8";
-print &foo2("ok 11\n","ok 12\n");
+@res = &foo2("a 1","b 2");
+is($res[0], "c 3");
+is($res[1], "d 4");
+
+is($a, "a 5");
+is("@b", "b 6");
+is($c[0], "c 7");
+is($d{''}, "d 8");
+is($x, "a 19");
+is($y, "c 20");
-print $a,@b,@c,%d,$x,$y;
eval 'local($$e)';
-print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 21\n";
+like($@, qr/Can't localize through a reference/);
+
+eval '$e = []; local(@$e)';
+like($@, qr/Can't localize through a reference/);
+
+eval '$e = {}; local(%$e)';
+like($@, qr/Can't localize through a reference/);
+
+# Array and hash elements
+
+@a = ('a', 'b', 'c');
+{
+ local($a[1]) = 'foo';
+ local($a[2]) = $a[2];
+ is($a[1], 'foo');
+ is($a[2], 'c');
+ undef @a;
+}
+is($a[1], 'b');
+is($a[2], 'c');
+ok(!defined $a[0]);
-eval 'local(@$e)';
-print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 22\n";
+@a = ('a', 'b', 'c');
+{
+ local($a[1]) = "X";
+ shift @a;
+}
+is($a[0].$a[1], "Xb");
+{
+ my $d = "@a";
+ local @a = @a;
+ is("@a", $d);
+}
-eval 'local(%$e)';
-print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 23\n";
+%h = ('a' => 1, 'b' => 2, 'c' => 3);
+{
+ local($h{'a'}) = 'foo';
+ local($h{'b'}) = $h{'b'};
+ is($h{'a'}, 'foo');
+ is($h{'b'}, 2);
+ local($h{'c'});
+ delete $h{'c'};
+}
+is($h{'a'}, 1);
+is($h{'b'}, 2);
+{
+ my $d = join("\n", map { "$_=>$h{$_}" } sort keys %h);
+ local %h = %h;
+ is(join("\n", map { "$_=>$h{$_}" } sort keys %h), $d);
+}
+is($h{'c'}, 3);
# check for scope leakage
$a = 'outer';
if (1) { local $a = 'inner' }
-print +($a eq 'outer') ? "" : "not ", "ok 24\n";
+is($a, 'outer');
+
+# see if localization works when scope unwinds
+local $m = 5;
+eval {
+ for $m (6) {
+ local $m = 7;
+ die "bye";
+ }
+};
+is($m, 5);
+
+# 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]) = $a[2];
+ is($a[1], 'foo');
+ is($a[2], 'c');
+ @a = ();
+}
+is($a[1], 'b');
+is($a[2], 'c');
+ok(!defined $a[0]);
+{
+ my $d = "@a";
+ local @a = @a;
+ is("@a", $d);
+}
+
+{
+ 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"; %{$_[0]} = (); }
+ sub FIRSTKEY { print "# FIRSTKEY [@_]\n"; keys %{$_[0]}; each %{$_[0]} }
+ sub NEXTKEY { print "# NEXTKEY [@_]\n"; each %{$_[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($h{'z'}) = 33;
+ is($h{'a'}, 'foo');
+ is($h{'b'}, 2);
+ local($h{'c'});
+ delete $h{'c'};
+}
+is($h{'a'}, 1);
+is($h{'b'}, 2);
+is($h{'c'}, 3);
+# local() should preserve the existenceness of tied hash elements
+ok(! exists $h{'y'});
+ok(! exists $h{'z'});
+TODO: {
+ todo_skip("Localize entire tied hash");
+ my $d = join("\n", map { "$_=>$h{$_}" } sort keys %h);
+ local %h = %h;
+ is(join("\n", map { "$_=>$h{$_}" } sort keys %h), $d);
+}
+
+@a = ('a', 'b', 'c');
+{
+ local($a[1]) = "X";
+ shift @a;
+}
+is($a[0].$a[1], "Xb");
+
+# 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__}) = $SIG{__WARN__};
+ is($SIG{TERM}, 'main::foo');
+ is($SIG{INT}, \&foo);
+ is($SIG{__WARN__}, \&foo);
+ local($SIG{INT});
+ delete $SIG{__WARN__};
+}
+is($SIG{TERM}, 'main::foo');
+is($SIG{INT}, \&foo);
+is($SIG{__WARN__}, \&foo);
+{
+ my $d = join("\n", map { "$_=>$SIG{$_}" } sort keys %SIG);
+ local %SIG = %SIG;
+ is(join("\n", map { "$_=>$SIG{$_}" } sort keys %SIG), $d);
+}
+
+# and for %ENV
+
+$ENV{_X_} = 'a';
+$ENV{_Y_} = 'b';
+$ENV{_Z_} = 'c';
+{
+ local($ENV{_A_});
+ local($ENV{_B_}) = 'foo';
+ local($ENV{_X_}) = 'foo';
+ local($ENV{_Y_}) = $ENV{_Y_};
+ is($ENV{_X_}, 'foo');
+ is($ENV{_Y_}, 'b');
+ local($ENV{_Z_});
+ delete $ENV{_Z_};
+}
+is($ENV{_X_}, 'a');
+is($ENV{_Y_}, 'b');
+is($ENV{_Z_}, 'c');
+# local() should preserve the existenceness of %ENV elements
+ok(! exists $ENV{_A_});
+ok(! exists $ENV{_B_});
+
+SKIP: {
+ skip("Can't make list assignment to \%ENV on this system")
+ unless $list_assignment_supported;
+ my $d = join("\n", map { "$_=>$ENV{$_}" } sort keys %ENV);
+ local %ENV = %ENV;
+ is(join("\n", map { "$_=>$ENV{$_}" } sort keys %ENV), $d);
+}
+
+# does implicit localization in foreach skip magic?
+
+$_ = "o 0,o 1,";
+my $iter = 0;
+while (/(o.+?),/gc) {
+ is($1, "o $iter");
+ foreach (1..1) { $iter++ }
+ if ($iter > 2) { fail("endless loop"); last; }
+}
+
+{
+ package UnderScore;
+ sub TIESCALAR { bless \my $self, shift }
+ sub FETCH { die "read \$_ forbidden" }
+ sub STORE { die "write \$_ forbidden" }
+ tie $_, __PACKAGE__;
+ 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, $ok) = splice(@tests, 0, 3) ) {
+ eval { &$code };
+ main::ok(($ok xor $@), "Underscore '$name'");
+ }
+ untie $_;
+}
+
+{
+ # BUG 20001205.22
+ my %x;
+ $x{a} = 1;
+ { local $x{b} = 1; }
+ ok(! exists $x{b});
+ { local @x{c,d,e}; }
+ ok(! exists $x{c});
+}
+
+# local() and readonly magic variables
+
+eval { local $1 = 1 };
+like($@, qr/Modification of a read-only value attempted/);
+
+eval { for ($1) { local $_ = 1 } };
+like($@, qr/Modification of a read-only value attempted/);
+
+# make sure $1 is still read-only
+eval { for ($1) { local $_ = 1 } };
+like($@, qr/Modification of a read-only value attempted/);
+
+# The s/// adds 'g' magic to $_, but it should remain non-readonly
+eval { for("a") { for $x (1,2) { local $_="b"; s/(.*)/+$1/ } } };
+is($@, "");
+
+# Special local() behavior for $[
+# (see RT #38207 - Useless localization of constant ($[) in getopts.pl}
+{
+ local $[ = 1;
+ local $TODO = "local() not currently working correctly with \$[";
+ ok(1 == $[);
+ undef $TODO;
+ f();
+}
+
+sub f { ok(0 == $[); }
+
+# sub localisation
+{
+ package Other;
+
+ sub f1 { "f1" }
+ sub f2 { "f2" }
+
+ no warnings "redefine";
+ {
+ local *f1 = sub { "g1" };
+ ::ok(f1() eq "g1", "localised sub via glob");
+ }
+ ::ok(f1() eq "f1", "localised sub restored");
+ {
+ local $Other::{"f1"} = sub { "h1" };
+ ::ok(f1() eq "h1", "localised sub via stash");
+ }
+ ::ok(f1() eq "f1", "localised sub restored");
+ {
+ local @Other::{qw/ f1 f2 /} = (sub { "j1" }, sub { "j2" });
+ ::ok(f1() eq "j1", "localised sub via stash slice");
+ ::ok(f2() eq "j2", "localised sub via stash slice");
+ }
+ ::ok(f1() eq "f1", "localised sub restored");
+ ::ok(f2() eq "f2", "localised sub restored");
+}
+
+# Localising unicode keys (bug #38815)
+{
+ my %h;
+ $h{"\243"} = "pound";
+ $h{"\302\240"} = "octects";
+ is(scalar keys %h, 2);
+ {
+ my $unicode = chr 256;
+ my $ambigous = "\240" . $unicode;
+ chop $ambigous;
+ local $h{$unicode} = 256;
+ local $h{$ambigous} = 160;
+
+ is(scalar keys %h, 4);
+ is($h{"\243"}, "pound");
+ is($h{$unicode}, 256);
+ is($h{$ambigous}, 160);
+ is($h{"\302\240"}, "octects");
+ }
+ is(scalar keys %h, 2);
+ is($h{"\243"}, "pound");
+ is($h{"\302\240"}, "octects");
+}
+
+# And with slices
+{
+ my %h;
+ $h{"\243"} = "pound";
+ $h{"\302\240"} = "octects";
+ is(scalar keys %h, 2);
+ {
+ my $unicode = chr 256;
+ my $ambigous = "\240" . $unicode;
+ chop $ambigous;
+ local @h{$unicode, $ambigous} = (256, 160);
+
+ is(scalar keys %h, 4);
+ is($h{"\243"}, "pound");
+ is($h{$unicode}, 256);
+ is($h{$ambigous}, 160);
+ is($h{"\302\240"}, "octects");
+ }
+ is(scalar keys %h, 2);
+ is($h{"\243"}, "pound");
+ is($h{"\302\240"}, "octects");
+}
+
+# [perl #39012] localizing @_ element then shifting frees element too # soon
+
+{
+ my $x;
+ my $y = bless [], 'X39012';
+ sub X39012::DESTROY { $x++ }
+ sub { local $_[0]; shift }->($y);
+ ok(!$x, '[perl #39012]');
+
+}
+
+# when localising a hash element, the key should be copied, not referenced
+
+{
+ my %h=('k1' => 111);
+ my $k='k1';
+ {
+ local $h{$k}=222;
+
+ is($h{'k1'},222);
+ $k='k2';
+ }
+ ok(! exists($h{'k2'}));
+ is($h{'k1'},111);
+}
+{
+ my %h=('k1' => 111);
+ our $k = 'k1'; # try dynamic too
+ {
+ local $h{$k}=222;
+ is($h{'k1'},222);
+ $k='k2';
+ }
+ ok(! exists($h{'k2'}));
+ is($h{'k1'},111);
+}
+
+# Keep this test last, as it can SEGV
+{
+ local *@;
+ pass("Localised *@");
+ eval {1};
+ pass("Can eval with *@ localised");
+}
projects / p5sagit/p5-mst-13.2.git / blobdiff