[perl5.git] / t / op / local.t

#!./perl

print "1..75\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;
}

$a = "ok 5\n";
$b = "ok 6\n";
$c = "ok 7\n";
$d = "ok 8\n";

print &foo("ok 1\n","ok 2\n");

print $a,$b,$c,$d,$x,$y;

# 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{''};
}

$a = "ok 15\n";
@b = "ok 16\n";
@c = "ok 17\n";
$d{''} = "ok 18\n";

print &foo2("ok 11\n","ok 12\n");

print $a,@b,@c,%d,$x,$y;

eval 'local($$e)';
print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 21\n";

eval '$e = []; local(@$e)';
print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 22\n";

eval '$e = {}; local(%$e)';
print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 23\n";

# Array and hash elements

@a = ('a', 'b', 'c');
{
    local($a[1]) = 'foo';
    local($a[2]) = $a[2];
    print +($a[1] eq 'foo') ? "" : "not ", "ok 24\n";
    print +($a[2] eq 'c') ? "" : "not ", "ok 25\n";
    undef @a;
}
print +($a[1] eq 'b') ? "" : "not ", "ok 26\n";
print +($a[2] eq 'c') ? "" : "not ", "ok 27\n";
print +(!defined $a[0]) ? "" : "not ", "ok 28\n";

@a = ('a', 'b', 'c');
{
    local($a[1]) = "X";
    shift @a;
}
print +($a[0].$a[1] eq "Xb") ? "" : "not ", "ok 29\n";

%h = ('a' => 1, 'b' => 2, 'c' => 3);
{
    local($h{'a'}) = 'foo';
    local($h{'b'}) = $h{'b'};
    print +($h{'a'} eq 'foo') ? "" : "not ", "ok 30\n";
    print +($h{'b'} == 2) ? "" : "not ", "ok 31\n";
    local($h{'c'});
    delete $h{'c'};
}
print +($h{'a'} == 1) ? "" : "not ", "ok 32\n";
print +($h{'b'} == 2) ? "" : "not ", "ok 33\n";
print +($h{'c'} == 3) ? "" : "not ", "ok 34\n";

# check for scope leakage
$a = 'outer';
if (1) { local $a = 'inner' }
print +($a eq 'outer') ? "" : "not ", "ok 35\n";

# see if localization works when scope unwinds
local $m = 5;
eval {
    for $m (6) {
	local $m = 7;
	die "bye";
    }
};
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 $ENV{_B_}; print "ok 75\n";
Commit	Line	Data
a687059c LW	1	#!./perl
a687059c LW	2
159ad915	3	print "1..75\n";
a687059c LW	4
	5	sub foo {
	6	local($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	20	print &foo("ok 1\n","ok 2\n");
a687059c LW	21
	22	print $a,$b,$c,$d,$x,$y;
	23
	24	# same thing, only with arrays and associative arrays
	25
	26	sub 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	41	print &foo2("ok 11\n","ok 12\n");
a687059c LW	42
a687059c LW	43	print $a,@b,@c,%d,$x,$y;
706a304b SM	44
	45	eval 'local($$e)';
	46	print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 21\n";
	47
82d03984	48	eval '$e = []; local(@$e)';
706a304b SM	49	print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 22\n";
706a304b SM	50
82d03984	51	eval '$e = {}; local(%$e)';
706a304b	52	print +($@ =~ /Can't localize through a reference/) ? "" : "not ", "ok 23\n";
85aff577	53
161b7d16 SM	54	# Array and hash elements
	55
	56	@a = ('a', 'b', 'c');
	57	{
	58	local($a[1]) = 'foo';
	59	local($a[2]) = $a[2];
2bb40b7f GS	60	print +($a[1] eq 'foo') ? "" : "not ", "ok 24\n";
2bb40b7f GS	61	print +($a[2] eq 'c') ? "" : "not ", "ok 25\n";
161b7d16 SM	62	undef @a;
161b7d16 SM	63	}
2bb40b7f GS	64	print +($a[1] eq 'b') ? "" : "not ", "ok 26\n";
	65	print +($a[2] eq 'c') ? "" : "not ", "ok 27\n";
	66	print +(!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	73	print +($a[0].$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";
2bb40b7f GS	80	print +($h{'b'} == 2) ? "" : "not ", "ok 31\n";
161b7d16 SM	81	local($h{'c'});
	82	delete $h{'c'};
	83	}
2bb40b7f GS	84	print +($h{'a'} == 1) ? "" : "not ", "ok 32\n";
	85	print +($h{'b'} == 2) ? "" : "not ", "ok 33\n";
	86	print +($h{'c'} == 3) ? "" : "not ", "ok 34\n";
	87
	88	# check for scope leakage
	89	$a = 'outer';
	90	if (1) { local $a = 'inner' }
	91	print +($a eq 'outer') ? "" : "not ", "ok 35\n";
	92
	93	# see if localization works when scope unwinds
	94	local $m = 5;
	95	eval {
	96	for $m (6) {
	97	local $m = 7;
	98	die "bye";
	99	}
	100	};
	101	print $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
	115	tie @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 +($a[2] eq 'c') ? "" : "not ", "ok 38\n";
4e4c362e GS	122	@a = ();
	123	}
	124	print +($a[1] eq 'b') ? "" : "not ", "ok 39\n";
	125	print +($a[2] eq 'c') ? "" : "not ", "ok 40\n";
	126	print +(!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]}; }
4e4c362e GS	134	sub DELETE { print "# DELETE [@_]\n"; delete $_[0]->{$_[1]}; }
	135	sub CLEAR { print "# CLEAR [@_]\n"; %{$_[0]} = (); }
	136	}
	137
	138	# see if localization works on tied hashes
	139	tie %h, 'TH';
	140	%h = ('a' => 1, 'b' => 2, 'c' => 3);
	141
	142	{
	143	local($h{'a'}) = 'foo';
be6c24e0	144	local($h{'b'}) = $h{'b'};
159ad915 DM	145	local($h{'y'});
159ad915 DM	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 $h{'c'};
	151	}
	152	print +($h{'a'} == 1) ? "" : "not ", "ok 44\n";
	153	print +($h{'b'} == 2) ? "" : "not ", "ok 45\n";
	154	print +($h{'c'} == 3) ? "" : "not ", "ok 46\n";
	155
	156	@a = ('a', 'b', 'c');
	157	{
	158	local($a[1]) = "X";
	159	shift @a;
	160	}
	161	print +($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 $SIG{__WARN__};
	177	}
	178	print +($SIG{TERM} eq 'main::foo') ? "" : "not ", "ok 51\n";
	179	print +($SIG{INT} eq \&foo) ? "" : "not ", "ok 52\n";
	180	print +($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_});
159ad915 DM	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 $ENV{_Z_};
	196	}
	197	print +($ENV{_X_} eq 'a') ? "" : "not ", "ok 56\n";
	198	print +($ENV{_Y_} eq 'b') ? "" : "not ", "ok 57\n";
	199	print +($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,";
	204	my $iter = 0;
	205	while (/(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
	256	print "not " if exists $h{'y'}; print "ok 72\n";
	257	print "not " if exists $h{'z'}; print "ok 73\n";
	258	print "not " if exists $ENV{_A_}; print "ok 74\n";
	259	print "not " if exists $ENV{_B_}; print "ok 75\n";