xref: /openbsd/gnu/usr.bin/perl/t/op/do.t (revision 91f110e0) 
1#!./perl -w
2
3require './test.pl';
4use strict;
5no warnings 'void';
6
7sub foo1
8{
9    ok($_[0], 'in foo1');
10    'value';
11}
12
13sub foo2
14{
15    shift;
16    ok($_[0], 'in foo2');
17    my $x = 'value';
18    $x;
19}
20
21my $result;
22$_[0] = 0;
23{
24    no warnings 'deprecated';
25    $result = do foo1(1);
26}
27
28is($result, 'value', 'do &sub and proper @_ handling');
29cmp_ok($_[0], '==', 0, 'do &sub and proper @_ handling');
30
31$_[0] = 0;
32{
33    no warnings 'deprecated';
34    $result = do foo2(0,1,0);
35}
36is($result, 'value', 'do &sub and proper @_ handling');
37cmp_ok($_[0], '==', 0, 'do &sub and proper @_ handling');
38
39my $called;
40$result = do{ ++$called; 'value';};
41is($called, 1, 'do block called');
42is($result, 'value', 'do block returns correct value');
43
44my @blathered;
45sub blather {
46    push @blathered, $_ foreach @_;
47}
48
49{
50    no warnings 'deprecated';
51    do blather("ayep","sho nuff");
52    is("@blathered", "ayep sho nuff", 'blathered called with list');
53}
54@blathered = ();
55
56my @x = ("jeepers", "okydoke");
57my @y = ("uhhuh", "yeppers");
58{
59    no warnings 'deprecated';
60    do blather(@x,"noofie",@y);
61    is("@blathered", "@x noofie @y", 'blathered called with arrays too');
62}
63
64unshift @INC, '.';
65
66my $file16 = tempfile();
67if (open my $do, '>', $file16) {
68    print $do "isnt(wantarray, undef, 'do in scalar context');\n";
69    print $do "cmp_ok(wantarray, '==', 0, 'do in scalar context');\n";
70    close $do or die "Could not close: $!";
71}
72
73my $a = do $file16; die $@ if $@;
74
75my $file17 = tempfile();
76if (open my $do, '>', $file17) {
77    print $do "isnt(wantarray, undef, 'do in list context');\n";
78    print $do "cmp_ok(wantarray, '!=', 0, 'do in list context');\n";
79    close $do or die "Could not close: $!";
80}
81
82my @a = do $file17; die $@ if $@;
83
84my $file18 = tempfile();
85if (open my $do, '>', $file18) {
86    print $do "is(wantarray, undef, 'do in void context');\n";
87    close $do or die "Could not close: $!";
88}
89
90do $file18; die $@ if $@;
91
92# bug ID 20010920.007
93eval qq{ do qq(a file that does not exist); };
94is($@, '', "do on a non-existing file, first try");
95
96eval qq{ do uc qq(a file that does not exist); };
97is($@, '', "do on a non-existing file, second try");
98
99# 6 must be interpreted as a file name here
100$! = 0;
101my $do6 = do 6;
102my $errno = $1;
103is($do6, undef, 'do 6 must be interpreted as a filename');
104isnt($!, 0, 'and should set $!');
105
106# [perl #19545]
107my ($u, @t);
108{
109    no warnings 'uninitialized';
110    push @t, ($u = (do {} . "This should be pushed."));
111}
112is($#t, 0, "empty do result value" );
113
114my $zok = '';
115my $owww = do { 1 if $zok };
116is($owww, '', 'last is unless');
117$owww = do { 2 unless not $zok };
118is($owww, 1, 'last is if not');
119
120$zok = 'swish';
121$owww = do { 3 unless $zok };
122is($owww, 'swish', 'last is unless');
123$owww = do { 4 if not $zok };
124is($owww, '', 'last is if not');
125
126# [perl #38809]
127@a = (7);
128my $x = sub { do { return do { @a } }; 2 }->();
129is($x, 1, 'return do { } receives caller scalar context');
130@x = sub { do { return do { @a } }; 2 }->();
131is("@x", "7", 'return do { } receives caller list context');
132
133@a = (7, 8);
134$x = sub { do { return do { 1; @a } }; 3 }->();
135is($x, 2, 'return do { ; } receives caller scalar context');
136@x = sub { do { return do { 1; @a } }; 3 }->();
137is("@x", "7 8", 'return do { ; } receives caller list context');
138
139my @b = (11 .. 15);
140$x = sub { do { return do { 1; @a, @b } }; 3 }->();
141is($x, 5, 'return do { ; , } receives caller scalar context');
142@x = sub { do { return do { 1; @a, @b } }; 3 }->();
143is("@x", "7 8 11 12 13 14 15", 'return do { ; , } receives caller list context');
144
145$x = sub { do { return do { 1; @a }, do { 2; @b } }; 3 }->();
146is($x, 5, 'return do { ; }, do { ; } receives caller scalar context');
147@x = sub { do { return do { 1; @a }, do { 2; @b } }; 3 }->();
148is("@x", "7 8 11 12 13 14 15", 'return do { ; }, do { ; } receives caller list context');
149
150@a = (7, 8, 9);
151$x = sub { do { do { 1; return @a } }; 4 }->();
152is($x, 3, 'do { return } receives caller scalar context');
153@x = sub { do { do { 1; return @a } }; 4 }->();
154is("@x", "7 8 9", 'do { return } receives caller list context');
155
156@a = (7, 8, 9, 10);
157$x = sub { do { return do { 1; do { 2; @a } } }; 5 }->();
158is($x, 4, 'return do { do { ; } } receives caller scalar context');
159@x = sub { do { return do { 1; do { 2; @a } } }; 5 }->();
160is("@x", "7 8 9 10", 'return do { do { ; } } receives caller list context');
161
162# More tests about context propagation below return()
163@a = (11, 12);
164@b = (21, 22, 23);
165
166my $test_code = sub {
167    my ($x, $y) = @_;
168    if ($x) {
169	return $y ? do { my $z; @a } : do { my $z; @b };
170    } else {
171	return (
172	    do { my $z; @a },
173	    (do { my$z; @b }) x $y
174	);
175    }
176    'xxx';
177};
178
179$x = $test_code->(1, 1);
180is($x, 2, 'return $y ? do { } : do { } - scalar context 1');
181$x = $test_code->(1, 0);
182is($x, 3, 'return $y ? do { } : do { } - scalar context 2');
183@x = $test_code->(1, 1);
184is("@x", '11 12', 'return $y ? do { } : do { } - list context 1');
185@x = $test_code->(1, 0);
186is("@x", '21 22 23', 'return $y ? do { } : do { } - list context 2');
187
188$x = $test_code->(0, 0);
189is($x, "", 'return (do { }, (do { }) x ...) - scalar context 1');
190$x = $test_code->(0, 1);
191is($x, 3, 'return (do { }, (do { }) x ...) - scalar context 2');
192@x = $test_code->(0, 0);
193is("@x", '11 12', 'return (do { }, (do { }) x ...) - list context 1');
194@x = $test_code->(0, 1);
195is("@x", '11 12 21 22 23', 'return (do { }, (do { }) x ...) - list context 2');
196
197$test_code = sub {
198    my ($x, $y) = @_;
199    if ($x) {
200	return do {
201	    if ($y == 0) {
202		my $z;
203		@a;
204	    } elsif ($y == 1) {
205		my $z;
206		@b;
207	    } else {
208		my $z;
209		(wantarray ? reverse(@a) : '99');
210	    }
211	};
212    }
213    'xxx';
214};
215
216$x = $test_code->(1, 0);
217is($x, 2, 'return do { if () { } elsif () { } else { } } - scalar 1');
218$x = $test_code->(1, 1);
219is($x, 3, 'return do { if () { } elsif () { } else { } } - scalar 2');
220$x = $test_code->(1, 2);
221is($x, 99, 'return do { if () { } elsif () { } else { } } - scalar 3');
222@x = $test_code->(1, 0);
223is("@x", '11 12', 'return do { if () { } elsif () { } else { } } - list 1');
224@x = $test_code->(1, 1);
225is("@x", '21 22 23', 'return do { if () { } elsif () { } else { } } - list 2');
226@x = $test_code->(1, 2);
227is("@x", '12 11', 'return do { if () { } elsif () { } else { } } - list 3');
228
229# Do blocks created by constant folding
230# [perl #68108]
231$x = sub { if (1) { 20 } }->();
232is($x, 20, 'if (1) { $x } receives caller scalar context');
233
234@a = (21 .. 23);
235$x = sub { if (1) { @a } }->();
236is($x, 3, 'if (1) { @a } receives caller scalar context');
237@x = sub { if (1) { @a } }->();
238is("@x", "21 22 23", 'if (1) { @a } receives caller list context');
239
240$x = sub { if (1) { 0; 20 } }->();
241is($x, 20, 'if (1) { ...; $x } receives caller scalar context');
242
243@a = (24 .. 27);
244$x = sub { if (1) { 0; @a } }->();
245is($x, 4, 'if (1) { ...; @a } receives caller scalar context');
246@x = sub { if (1) { 0; @a } }->();
247is("@x", "24 25 26 27", 'if (1) { ...; @a } receives caller list context');
248
249$x = sub { if (1) { 0; 20 } else{} }->();
250is($x, 20, 'if (1) { ...; $x } else{} receives caller scalar context');
251
252@a = (24 .. 27);
253$x = sub { if (1) { 0; @a } else{} }->();
254is($x, 4, 'if (1) { ...; @a } else{} receives caller scalar context');
255@x = sub { if (1) { 0; @a } else{} }->();
256is("@x", "24 25 26 27", 'if (1) { ...; @a } else{} receives caller list context');
257
258$x = sub { if (0){} else { 0; 20 } }->();
259is($x, 20, 'if (0){} else { ...; $x } receives caller scalar context');
260
261@a = (24 .. 27);
262$x = sub { if (0){} else { 0; @a } }->();
263is($x, 4, 'if (0){} else { ...; @a } receives caller scalar context');
264@x = sub { if (0){} else { 0; @a } }->();
265is("@x", "24 25 26 27", 'if (0){} else { ...; @a } receives caller list context');
266
267# [rt.cpan.org #72767] do "string" should not propagate warning hints
268SKIP: {
269  skip_if_miniperl("no in-memory files under miniperl", 1);
270
271  my $code = '42; 1';
272  # Based on Eval::WithLexicals::_eval_do
273  local @INC = (sub {
274    if ($_[1] eq '/eval_do') {
275      open my $fh, '<', \$code;
276      $fh;
277    } else {
278      ();
279    }
280  }, @INC);
281  local $^W;
282  use warnings;
283  my $w;
284  local $SIG{__WARN__} = sub { warn shift; ++$w };
285  do '/eval_do' or die $@;
286  is($w, undef, 'do STRING does not propagate warning hints');
287}
288
289done_testing();
290