[p5sagit/p5-mst-13.2.git] / t / pragma / overload.t

#!./perl

BEGIN {
    chdir 't' if -d 't';
    @INC = '../lib';
}

use Config;

package Oscalar;
use overload ( 
				# Anonymous subroutines:
'+'	=>	sub {new Oscalar $ {$_[0]}+$_[1]},
'-'	=>	sub {new Oscalar
		       $_[2]? $_[1]-${$_[0]} : ${$_[0]}-$_[1]},
'<=>'	=>	sub {new Oscalar
		       $_[2]? $_[1]-${$_[0]} : ${$_[0]}-$_[1]},
'cmp'	=>	sub {new Oscalar
		       $_[2]? ($_[1] cmp ${$_[0]}) : (${$_[0]} cmp $_[1])},
'*'	=>	sub {new Oscalar ${$_[0]}*$_[1]},
'/'	=>	sub {new Oscalar 
		       $_[2]? $_[1]/${$_[0]} :
			 ${$_[0]}/$_[1]},
'%'	=>	sub {new Oscalar
		       $_[2]? $_[1]%${$_[0]} : ${$_[0]}%$_[1]},
'**'	=>	sub {new Oscalar
		       $_[2]? $_[1]**${$_[0]} : ${$_[0]}-$_[1]},

qw(
""	stringify
0+	numify)			# Order of arguments unsignificant
);

sub new {
  my $foo = $_[1];
  bless \$foo, $_[0];
}

sub stringify { "${$_[0]}" }
sub numify { 0 + "${$_[0]}" }	# Not needed, additional overhead
				# comparing to direct compilation based on
				# stringify

package main;

$test = 0;
$| = 1;
print "1..",&last,"\n";

sub test {
  $test++; if (shift) {print "ok $test\n";1} else {print "not ok $test\n";0}
}

$a = new Oscalar "087";
$b= "$a";

# All test numbers in comments are off by 1.
# So much for hard-wiring them in :-) To fix this:
test(1);			# 1

test ($b eq $a);		# 2
test ($b eq "087");		# 3
test (ref $a eq "Oscalar");	# 4
test ($a eq $a);		# 5
test ($a eq "087");		# 6

$c = $a + 7;

test (ref $c eq "Oscalar");	# 7
test (!($c eq $a));		# 8
test ($c eq "94");		# 9

$b=$a;

test (ref $a eq "Oscalar");	# 10

$b++;

test (ref $b eq "Oscalar");	# 11
test ( $a eq "087");		# 12
test ( $b eq "88");		# 13
test (ref $a eq "Oscalar");	# 14

$c=$b;
$c-=$a;

test (ref $c eq "Oscalar");	# 15
test ( $a eq "087");		# 16
test ( $c eq "1");		# 17
test (ref $a eq "Oscalar");	# 18

$b=1;
$b+=$a;

test (ref $b eq "Oscalar");	# 19
test ( $a eq "087");		# 20
test ( $b eq "88");		# 21
test (ref $a eq "Oscalar");	# 22

eval q[ package Oscalar; use overload ('++' => sub { $ {$_[0]}++;$_[0] } ) ];

$b=$a;

test (ref $a eq "Oscalar");	# 23

$b++;

test (ref $b eq "Oscalar");	# 24
test ( $a eq "087");		# 25
test ( $b eq "88");		# 26
test (ref $a eq "Oscalar");	# 27

package Oscalar;
$dummy=bless \$dummy;		# Now cache of method should be reloaded
package main;

$b=$a;
$b++;				

test (ref $b eq "Oscalar");	# 28
test ( $a eq "087");		# 29
test ( $b eq "88");		# 30
test (ref $a eq "Oscalar");	# 31


eval q[package Oscalar; use overload ('++' => sub { $ {$_[0]} += 2; $_[0] } ) ];

$b=$a;

test (ref $a eq "Oscalar");	# 32

$b++;

test (ref $b eq "Oscalar");	# 33
test ( $a eq "087");		# 34
test ( $b eq "88");		# 35
test (ref $a eq "Oscalar");	# 36

package Oscalar;
$dummy=bless \$dummy;		# Now cache of method should be reloaded
package main;

$b++;				

test (ref $b eq "Oscalar");	# 37
test ( $a eq "087");		# 38
test ( $b eq "90");		# 39
test (ref $a eq "Oscalar");	# 40

$b=$a;
$b++;

test (ref $b eq "Oscalar");	# 41
test ( $a eq "087");		# 42
test ( $b eq "89");		# 43
test (ref $a eq "Oscalar");	# 44


test ($b? 1:0);			# 45

eval q[ package Oscalar; use overload ('=' => sub {$main::copies++; 
						   package Oscalar;
						   local $new=$ {$_[0]};
						   bless \$new } ) ];

$b=new Oscalar "$a";

test (ref $b eq "Oscalar");	# 46
test ( $a eq "087");		# 47
test ( $b eq "087");		# 48
test (ref $a eq "Oscalar");	# 49

$b++;

test (ref $b eq "Oscalar");	# 50
test ( $a eq "087");		# 51
test ( $b eq "89");		# 52
test (ref $a eq "Oscalar");	# 53
test ($copies == 0);		# 54

$b+=1;

test (ref $b eq "Oscalar");	# 55
test ( $a eq "087");		# 56
test ( $b eq "90");		# 57
test (ref $a eq "Oscalar");	# 58
test ($copies == 0);		# 59

$b=$a;
$b+=1;

test (ref $b eq "Oscalar");	# 60
test ( $a eq "087");		# 61
test ( $b eq "88");		# 62
test (ref $a eq "Oscalar");	# 63
test ($copies == 0);		# 64

$b=$a;
$b++;

test (ref $b eq "Oscalar") || print ref $b,"=ref(b)\n";	# 65
test ( $a eq "087");		# 66
test ( $b eq "89");		# 67
test (ref $a eq "Oscalar");	# 68
test ($copies == 1);		# 69

eval q[package Oscalar; use overload ('+=' => sub {$ {$_[0]} += 3*$_[1];
						   $_[0] } ) ];
$c=new Oscalar;			# Cause rehash

$b=$a;
$b+=1;

test (ref $b eq "Oscalar");	# 70
test ( $a eq "087");		# 71
test ( $b eq "90");		# 72
test (ref $a eq "Oscalar");	# 73
test ($copies == 2);		# 74

$b+=$b;

test (ref $b eq "Oscalar");	# 75
test ( $b eq "360");		# 76
test ($copies == 2);		# 77
$b=-$b;

test (ref $b eq "Oscalar");	# 78
test ( $b eq "-360");		# 79
test ($copies == 2);		# 80

$b=abs($b);

test (ref $b eq "Oscalar");	# 81
test ( $b eq "360");		# 82
test ($copies == 2);		# 83

$b=abs($b);

test (ref $b eq "Oscalar");	# 84
test ( $b eq "360");		# 85
test ($copies == 2);		# 86

eval q[package Oscalar; 
       use overload ('x' => sub {new Oscalar ( $_[2] ? "_.$_[1]._" x $ {$_[0]}
					      : "_.${$_[0]}._" x $_[1])}) ];

$a=new Oscalar "yy";
$a x= 3;
test ($a eq "_.yy.__.yy.__.yy._"); # 87

eval q[package Oscalar; 
       use overload ('.' => sub {new Oscalar ( $_[2] ? 
					      "_.$_[1].__.$ {$_[0]}._"
					      : "_.$ {$_[0]}.__.$_[1]._")}) ];

$a=new Oscalar "xx";

test ("b${a}c" eq "_._.b.__.xx._.__.c._"); # 88

# Check inheritance of overloading;
{
  package OscalarI;
  @ISA = 'Oscalar';
}

$aI = new OscalarI "$a";
test (ref $aI eq "OscalarI");	# 89
test ("$aI" eq "xx");		# 90
test ($aI eq "xx");		# 91
test ("b${aI}c" eq "_._.b.__.xx._.__.c._");		# 92

# Here we test blessing to a package updates hash

eval "package Oscalar; no overload '.'";

test ("b${a}" eq "_.b.__.xx._"); # 93
$x="1";
bless \$x, Oscalar;
test ("b${a}c" eq "bxxc");	# 94
new Oscalar 1;
test ("b${a}c" eq "bxxc");	# 95

# Negative overloading:

$na = eval { ~$a };
test($@ =~ /no method found/);	# 96

# Check AUTOLOADING:

*Oscalar::AUTOLOAD = 
  sub { *{"Oscalar::$AUTOLOAD"} = sub {"_!_" . shift() . "_!_"} ;
	goto &{"Oscalar::$AUTOLOAD"}};

eval "package Oscalar; sub comple; use overload '~' => 'comple'";

$na = eval { ~$a };		# Hash was not updated
test($@ =~ /no method found/);	# 97

bless \$x, Oscalar;

$na = eval { ~$a };		# Hash updated
warn "`$na', $@" if $@;
test !$@;			# 98
test($na eq '_!_xx_!_');	# 99

$na = 0;

$na = eval { ~$aI };		# Hash was not updated
test($@ =~ /no method found/);	# 100

bless \$x, OscalarI;

$na = eval { ~$aI };
print $@;

test !$@;			# 101
test($na eq '_!_xx_!_');	# 102

eval "package Oscalar; sub rshft; use overload '>>' => 'rshft'";

$na = eval { $aI >> 1 };	# Hash was not updated
test($@ =~ /no method found/);	# 103

bless \$x, OscalarI;

$na = 0;

$na = eval { $aI >> 1 };
print $@;

test !$@;			# 104
test($na eq '_!_xx_!_');	# 105

# warn overload::Method($a, '0+'), "\n";
test (overload::Method($a, '0+') eq \&Oscalar::numify); # 106
test (overload::Method($aI,'0+') eq \&Oscalar::numify); # 107
test (overload::Overloaded($aI)); # 108
test (!overload::Overloaded('overload')); # 109

test (! defined overload::Method($aI, '<<')); # 110
test (! defined overload::Method($a, '<')); # 111

test (overload::StrVal($aI) =~ /^OscalarI=SCALAR\(0x[\da-fA-F]+\)$/); # 112
test (overload::StrVal(\$aI) eq "@{[\$aI]}"); # 113

# Check overloading by methods (specified deep in the ISA tree).
{
  package OscalarII;
  @ISA = 'OscalarI';
  sub Oscalar::lshft {"_<<_" . shift() . "_<<_"}
  eval "package OscalarI; use overload '<<' => 'lshft', '|' => 'lshft'";
}

$aaII = "087";
$aII = \$aaII;
bless $aII, 'OscalarII';
bless \$fake, 'OscalarI';		# update the hash
test(($aI | 3) eq '_<<_xx_<<_');	# 114
# warn $aII << 3;
test(($aII << 3) eq '_<<_087_<<_');	# 115

# Last test is:
sub last {115}
Commit	Line	Data
8ebc5c01	1	#!./perl
	2
	3	BEGIN {
	4	chdir 't' if -d 't';
	5	@INC = '../lib';
	6	}
	7
	8	use Config;
	9
	10	package Oscalar;
	11	use overload (
	12	# Anonymous subroutines:
	13	'+' => sub {new Oscalar $ {$_[0]}+$_[1]},
	14	'-' => sub {new Oscalar
	15	$_[2]? $_[1]-${$_[0]} : ${$_[0]}-$_[1]},
	16	'<=>' => sub {new Oscalar
	17	$_[2]? $_[1]-${$_[0]} : ${$_[0]}-$_[1]},
	18	'cmp' => sub {new Oscalar
	19	$_[2]? ($_[1] cmp ${$_[0]}) : (${$_[0]} cmp $_[1])},
	20	'' => sub {new Oscalar ${$_[0]}$_[1]},
	21	'/' => sub {new Oscalar
	22	$_[2]? $_[1]/${$_[0]} :
	23	${$_[0]}/$_[1]},
	24	'%' => sub {new Oscalar
	25	$_[2]? $_[1]%${$_[0]} : ${$_[0]}%$_[1]},
	26	'**' => sub {new Oscalar
	27	$_[2]? $_[1]**${$_[0]} : ${$_[0]}-$_[1]},
	28
	29	qw(
	30	"" stringify
	31	0+ numify) # Order of arguments unsignificant
	32	);
	33
	34	sub new {
	35	my $foo = $_[1];
	36	bless \$foo, $_[0];
	37	}
	38
	39	sub stringify { "${$_[0]}" }
	40	sub numify { 0 + "${$_[0]}" } # Not needed, additional overhead
	41	# comparing to direct compilation based on
	42	# stringify
	43
	44	package main;
	45
	46	$test = 0;
	47	$\| = 1;
	48	print "1..",&last,"\n";
	49
	50	sub test {
	51	$test++; if (shift) {print "ok $test\n";1} else {print "not ok $test\n";0}
	52	}
	53
	54	$a = new Oscalar "087";
	55	$b= "$a";
	56
	57	# All test numbers in comments are off by 1.
	58	# So much for hard-wiring them in :-) To fix this:
	59	test(1); # 1
	60
	61	test ($b eq $a); # 2
	62	test ($b eq "087"); # 3
	63	test (ref $a eq "Oscalar"); # 4
	64	test ($a eq $a); # 5
65	test ($a eq "087"); # 6
66
67	$c = $a + 7;
68
69	test (ref $c eq "Oscalar"); # 7
70	test (!($c eq $a)); # 8
71	test ($c eq "94"); # 9
72
73	$b=$a;
74
75	test (ref $a eq "Oscalar"); # 10
76
77	$b++;
78
79	test (ref $b eq "Oscalar"); # 11
80	test ( $a eq "087"); # 12
81	test ( $b eq "88"); # 13
82	test (ref $a eq "Oscalar"); # 14
83
84	$c=$b;
85	$c-=$a;
86
87	test (ref $c eq "Oscalar"); # 15
88	test ( $a eq "087"); # 16
89	test ( $c eq "1"); # 17
90	test (ref $a eq "Oscalar"); # 18
91
92	$b=1;
93	$b+=$a;
94
95	test (ref $b eq "Oscalar"); # 19
96	test ( $a eq "087"); # 20
97	test ( $b eq "88"); # 21
98	test (ref $a eq "Oscalar"); # 22
99
100	eval q[ package Oscalar; use overload ('++' => sub { $ {$_[0]}++;$_[0] } ) ];
101
102	$b=$a;
103
104	test (ref $a eq "Oscalar"); # 23
105
106	$b++;
107
108	test (ref $b eq "Oscalar"); # 24
109	test ( $a eq "087"); # 25
110	test ( $b eq "88"); # 26
111	test (ref $a eq "Oscalar"); # 27
112
113	package Oscalar;
114	$dummy=bless \$dummy; # Now cache of method should be reloaded
115	package main;
116
117	$b=$a;
118	$b++;
119
120	test (ref $b eq "Oscalar"); # 28
121	test ( $a eq "087"); # 29
122	test ( $b eq "88"); # 30
123	test (ref $a eq "Oscalar"); # 31
124
125
126	eval q[package Oscalar; use overload ('++' => sub { $ {$_[0]} += 2; $_[0] } ) ];
127
128	$b=$a;
129
130	test (ref $a eq "Oscalar"); # 32
131
132	$b++;
133
134	test (ref $b eq "Oscalar"); # 33
135	test ( $a eq "087"); # 34
136	test ( $b eq "88"); # 35
137	test (ref $a eq "Oscalar"); # 36
138
139	package Oscalar;
140	$dummy=bless \$dummy; # Now cache of method should be reloaded
141	package main;
142
143	$b++;
144
145	test (ref $b eq "Oscalar"); # 37
146	test ( $a eq "087"); # 38
147	test ( $b eq "90"); # 39
148	test (ref $a eq "Oscalar"); # 40
149
150	$b=$a;
151	$b++;
152
153	test (ref $b eq "Oscalar"); # 41
154	test ( $a eq "087"); # 42
155	test ( $b eq "89"); # 43
156	test (ref $a eq "Oscalar"); # 44
157
158
159	test ($b? 1:0); # 45
160
161	eval q[ package Oscalar; use overload ('=' => sub {$main::copies++;
162	package Oscalar;
163	local $new=$ {$_[0]};
164	bless \$new } ) ];
165
166	$b=new Oscalar "$a";
167
168	test (ref $b eq "Oscalar"); # 46
169	test ( $a eq "087"); # 47
170	test ( $b eq "087"); # 48
171	test (ref $a eq "Oscalar"); # 49
172
173	$b++;
174
175	test (ref $b eq "Oscalar"); # 50
176	test ( $a eq "087"); # 51
177	test ( $b eq "89"); # 52
178	test (ref $a eq "Oscalar"); # 53
179	test ($copies == 0); # 54
180
181	$b+=1;
182
183	test (ref $b eq "Oscalar"); # 55
184	test ( $a eq "087"); # 56
185	test ( $b eq "90"); # 57
186	test (ref $a eq "Oscalar"); # 58
187	test ($copies == 0); # 59
188
189	$b=$a;
190	$b+=1;
191
192	test (ref $b eq "Oscalar"); # 60
193	test ( $a eq "087"); # 61
194	test ( $b eq "88"); # 62
195	test (ref $a eq "Oscalar"); # 63
196	test ($copies == 0); # 64
197
198	$b=$a;
199	$b++;
200
201	test (ref $b eq "Oscalar") \|\| print ref $b,"=ref(b)\n"; # 65
202	test ( $a eq "087"); # 66
203	test ( $b eq "89"); # 67
204	test (ref $a eq "Oscalar"); # 68
205	test ($copies == 1); # 69
206
207	eval q[package Oscalar; use overload ('+=' => sub {$ {$_[0]} += 3*$_[1];
208	$_[0] } ) ];
209	$c=new Oscalar; # Cause rehash
210
211	$b=$a;
212	$b+=1;
213
214	test (ref $b eq "Oscalar"); # 70
215	test ( $a eq "087"); # 71
216	test ( $b eq "90"); # 72
217	test (ref $a eq "Oscalar"); # 73
218	test ($copies == 2); # 74
219
220	$b+=$b;
221
222	test (ref $b eq "Oscalar"); # 75
223	test ( $b eq "360"); # 76
224	test ($copies == 2); # 77
225	$b=-$b;
226
227	test (ref $b eq "Oscalar"); # 78
228	test ( $b eq "-360"); # 79
229	test ($copies == 2); # 80
230
231	$b=abs($b);
232
233	test (ref $b eq "Oscalar"); # 81
234	test ( $b eq "360"); # 82
235	test ($copies == 2); # 83
236
237	$b=abs($b);
238
239	test (ref $b eq "Oscalar"); # 84
240	test ( $b eq "360"); # 85
241	test ($copies == 2); # 86
242
243	eval q[package Oscalar;
244	use overload ('x' => sub {new Oscalar ( $_[2] ? "_.$_[1]._" x $ {$_[0]}
245	: "_.${$_[0]}._" x $_[1])}) ];
246
247	$a=new Oscalar "yy";
248	$a x= 3;
249	test ($a eq "_.yy.__.yy.__.yy._"); # 87
250
251	eval q[package Oscalar;
252	use overload ('.' => sub {new Oscalar ( $_[2] ?
253	"_.$_[1].__.$ {$_[0]}._"
254	: "_.$ {$_[0]}.__.$_[1]._")}) ];
255
256	$a=new Oscalar "xx";
257
258	test ("b${a}c" eq "_._.b.__.xx._.__.c._"); # 88
259
260	# Check inheritance of overloading;
261	{
262	package OscalarI;
263	@ISA = 'Oscalar';
264	}
265
266	$aI = new OscalarI "$a";
267	test (ref $aI eq "OscalarI"); # 89
268	test ("$aI" eq "xx"); # 90
269	test ($aI eq "xx"); # 91
270	test ("b${aI}c" eq "_._.b.__.xx._.__.c._"); # 92
271
272	# Here we test blessing to a package updates hash
273
274	eval "package Oscalar; no overload '.'";
275
276	test ("b${a}" eq "_.b.__.xx._"); # 93
277	$x="1";
278	bless \$x, Oscalar;
279	test ("b${a}c" eq "bxxc"); # 94
280	new Oscalar 1;
281	test ("b${a}c" eq "bxxc"); # 95
282
283	# Negative overloading:
284
285	$na = eval { ~$a };
286	test($@ =~ /no method found/); # 96
287
288	# Check AUTOLOADING:
289
290	*Oscalar::AUTOLOAD =
291	sub { *{"Oscalar::$AUTOLOAD"} = sub {"_!_" . shift() . "_!_"} ;
292	goto &{"Oscalar::$AUTOLOAD"}};
293
44a8e56a	294	eval "package Oscalar; sub comple; use overload '~' => 'comple'";
8ebc5c01	295
	296	$na = eval { ~$a }; # Hash was not updated
	297	test($@ =~ /no method found/); # 97
	298
	299	bless \$x, Oscalar;
	300
	301	$na = eval { ~$a }; # Hash updated
44a8e56a	302	warn "`$na', $@" if $@;
8ebc5c01	303	test !$@; # 98
	304	test($na eq '_!_xx_!_'); # 99
	305
	306	$na = 0;
	307
	308	$na = eval { ~$aI }; # Hash was not updated
	309	test($@ =~ /no method found/); # 100
	310
	311	bless \$x, OscalarI;
	312
	313	$na = eval { ~$aI };
	314	print $@;
	315
	316	test !$@; # 101
	317	test($na eq '_!_xx_!_'); # 102
	318
44a8e56a	319	eval "package Oscalar; sub rshft; use overload '>>' => 'rshft'";
8ebc5c01	320
	321	$na = eval { $aI >> 1 }; # Hash was not updated
	322	test($@ =~ /no method found/); # 103
	323
	324	bless \$x, OscalarI;
	325
	326	$na = 0;
	327
	328	$na = eval { $aI >> 1 };
	329	print $@;
	330
	331	test !$@; # 104
	332	test($na eq '_!_xx_!_'); # 105
	333
44a8e56a	334	# warn overload::Method($a, '0+'), "\n";
8ebc5c01	335	test (overload::Method($a, '0+') eq \&Oscalar::numify); # 106
	336	test (overload::Method($aI,'0+') eq \&Oscalar::numify); # 107
	337	test (overload::Overloaded($aI)); # 108
	338	test (!overload::Overloaded('overload')); # 109
	339
	340	test (! defined overload::Method($aI, '<<')); # 110
	341	test (! defined overload::Method($a, '<')); # 111
	342
	343	test (overload::StrVal($aI) =~ /^OscalarI=SCALAR\(0x[\da-fA-F]+\)$/); # 112
	344	test (overload::StrVal(\$aI) eq "@{[\$aI]}"); # 113
	345
44a8e56a	346	# Check overloading by methods (specified deep in the ISA tree).
	347	{
	348	package OscalarII;
	349	@ISA = 'OscalarI';
	350	sub Oscalar::lshft {"_<<_" . shift() . "_<<_"}
	351	eval "package OscalarI; use overload '<<' => 'lshft', '\|' => 'lshft'";
	352	}
	353
	354	$aaII = "087";
	355	$aII = \$aaII;
	356	bless $aII, 'OscalarII';
	357	bless \$fake, 'OscalarI'; # update the hash
	358	test(($aI \| 3) eq '_<<_xx_<<_'); # 114
	359	# warn $aII << 3;
	360	test(($aII << 3) eq '_<<_087_<<_'); # 115
	361
8ebc5c01	362	# Last test is:
44a8e56a	363	sub last {115}