12 my $result = do{ ++$called; 'value';};
13 is($called, 1, 'do block called');
14 is($result, 'value', 'do block returns correct value');
18 my $file16 = tempfile();
19 if (open my $do, '>', $file16) {
20 print $do "isnt(wantarray, undef, 'do in scalar context');\n";
21 print $do "cmp_ok(wantarray, '==', 0, 'do in scalar context');\n";
22 close $do or die "Could not close: $!";
25 my $a = do $file16; die $@ if $@;
27 my $file17 = tempfile();
28 if (open my $do, '>', $file17) {
29 print $do "isnt(wantarray, undef, 'do in list context');\n";
30 print $do "cmp_ok(wantarray, '!=', 0, 'do in list context');\n";
31 close $do or die "Could not close: $!";
34 my @a = do $file17; die $@ if $@;
36 my $file18 = tempfile();
37 if (open my $do, '>', $file18) {
38 print $do "is(wantarray, undef, 'do in void context');\n";
39 close $do or die "Could not close: $!";
42 do $file18; die $@ if $@;
45 eval qq{ do qq(a file that does not exist); };
46 is($@, '', "do on a non-existing file, first try");
48 eval qq{ do uc qq(a file that does not exist); };
49 is($@, '', "do on a non-existing file, second try");
51 # 6 must be interpreted as a file name here
55 is($do6, undef, 'do 6 must be interpreted as a filename');
56 isnt($!, 0, 'and should set $!');
61 no warnings 'uninitialized';
62 push @t, ($u = (do {} . "This should be pushed."));
64 is($#t, 0, "empty do result value" );
67 my $owww = do { 1 if $zok };
68 is($owww, '', 'last is unless');
69 $owww = do { 2 unless not $zok };
70 is($owww, 1, 'last is if not');
73 $owww = do { 3 unless $zok };
74 is($owww, 'swish', 'last is unless');
75 $owww = do { 4 if not $zok };
76 is($owww, '', 'last is if not');
80 my $x = sub { do { return do { @a } }; 2 }->();
81 is($x, 1, 'return do { } receives caller scalar context');
82 my @x = sub { do { return do { @a } }; 2 }->();
83 is("@x", "7", 'return do { } receives caller list context');
86 $x = sub { do { return do { 1; @a } }; 3 }->();
87 is($x, 2, 'return do { ; } receives caller scalar context');
88 @x = sub { do { return do { 1; @a } }; 3 }->();
89 is("@x", "7 8", 'return do { ; } receives caller list context');
92 $x = sub { do { return do { 1; @a, @b } }; 3 }->();
93 is($x, 5, 'return do { ; , } receives caller scalar context');
94 @x = sub { do { return do { 1; @a, @b } }; 3 }->();
95 is("@x", "7 8 11 12 13 14 15", 'return do { ; , } receives caller list context');
97 $x = sub { do { return do { 1; @a }, do { 2; @b } }; 3 }->();
98 is($x, 5, 'return do { ; }, do { ; } receives caller scalar context');
99 @x = sub { do { return do { 1; @a }, do { 2; @b } }; 3 }->();
100 is("@x", "7 8 11 12 13 14 15", 'return do { ; }, do { ; } receives caller list context');
103 $x = sub { do { do { 1; return @a } }; 4 }->();
104 is($x, 3, 'do { return } receives caller scalar context');
105 @x = sub { do { do { 1; return @a } }; 4 }->();
106 is("@x", "7 8 9", 'do { return } receives caller list context');
109 $x = sub { do { return do { 1; do { 2; @a } } }; 5 }->();
110 is($x, 4, 'return do { do { ; } } receives caller scalar context');
111 @x = sub { do { return do { 1; do { 2; @a } } }; 5 }->();
112 is("@x", "7 8 9 10", 'return do { do { ; } } receives caller list context');
114 # More tests about context propagation below return()
118 my $test_code = sub {
121 return $y ? do { my $z; @a } : do { my $z; @b };
125 (do { my$z; @b }) x $y
131 $x = $test_code->(1, 1);
132 is($x, 2, 'return $y ? do { } : do { } - scalar context 1');
133 $x = $test_code->(1, 0);
134 is($x, 3, 'return $y ? do { } : do { } - scalar context 2');
135 @x = $test_code->(1, 1);
136 is("@x", '11 12', 'return $y ? do { } : do { } - list context 1');
137 @x = $test_code->(1, 0);
138 is("@x", '21 22 23', 'return $y ? do { } : do { } - list context 2');
140 $x = $test_code->(0, 0);
141 is($x, "", 'return (do { }, (do { }) x ...) - scalar context 1');
142 $x = $test_code->(0, 1);
143 is($x, 3, 'return (do { }, (do { }) x ...) - scalar context 2');
144 @x = $test_code->(0, 0);
145 is("@x", '11 12', 'return (do { }, (do { }) x ...) - list context 1');
146 @x = $test_code->(0, 1);
147 is("@x", '11 12 21 22 23', 'return (do { }, (do { }) x ...) - list context 2');
161 (wantarray ? reverse(@a) : '99');
168 $x = $test_code->(1, 0);
169 is($x, 2, 'return do { if () { } elsif () { } else { } } - scalar 1');
170 $x = $test_code->(1, 1);
171 is($x, 3, 'return do { if () { } elsif () { } else { } } - scalar 2');
172 $x = $test_code->(1, 2);
173 is($x, 99, 'return do { if () { } elsif () { } else { } } - scalar 3');
174 @x = $test_code->(1, 0);
175 is("@x", '11 12', 'return do { if () { } elsif () { } else { } } - list 1');
176 @x = $test_code->(1, 1);
177 is("@x", '21 22 23', 'return do { if () { } elsif () { } else { } } - list 2');
178 @x = $test_code->(1, 2);
179 is("@x", '12 11', 'return do { if () { } elsif () { } else { } } - list 3');
181 # Do blocks created by constant folding
183 $x = sub { if (1) { 20 } }->();
184 is($x, 20, 'if (1) { $x } receives caller scalar context');
187 $x = sub { if (1) { @a } }->();
188 is($x, 3, 'if (1) { @a } receives caller scalar context');
189 @x = sub { if (1) { @a } }->();
190 is("@x", "21 22 23", 'if (1) { @a } receives caller list context');
192 $x = sub { if (1) { 0; 20 } }->();
193 is($x, 20, 'if (1) { ...; $x } receives caller scalar context');
196 $x = sub { if (1) { 0; @a } }->();
197 is($x, 4, 'if (1) { ...; @a } receives caller scalar context');
198 @x = sub { if (1) { 0; @a } }->();
199 is("@x", "24 25 26 27", 'if (1) { ...; @a } receives caller list context');
201 $x = sub { if (1) { 0; 20 } else{} }->();
202 is($x, 20, 'if (1) { ...; $x } else{} receives caller scalar context');
205 $x = sub { if (1) { 0; @a } else{} }->();
206 is($x, 4, 'if (1) { ...; @a } else{} receives caller scalar context');
207 @x = sub { if (1) { 0; @a } else{} }->();
208 is("@x", "24 25 26 27", 'if (1) { ...; @a } else{} receives caller list context');
210 $x = sub { if (0){} else { 0; 20 } }->();
211 is($x, 20, 'if (0){} else { ...; $x } receives caller scalar context');
214 $x = sub { if (0){} else { 0; @a } }->();
215 is($x, 4, 'if (0){} else { ...; @a } receives caller scalar context');
216 @x = sub { if (0){} else { 0; @a } }->();
217 is("@x", "24 25 26 27", 'if (0){} else { ...; @a } receives caller list context');
219 # [rt.cpan.org #72767] do "string" should not propagate warning hints
221 skip_if_miniperl("no in-memory files under miniperl", 1);
224 # Based on Eval::WithLexicals::_eval_do
226 if ($_[1] eq '/eval_do') {
227 open my $fh, '<', \$code;
236 local $SIG{__WARN__} = sub { warn shift; ++$w };
237 do '/eval_do' or die $@;
238 is($w, undef, 'do STRING does not propagate warning hints');
241 # RT#113730 - $@ should be cleared on IO error.
243 $@ = "should not see";
245 my $rv = do("some nonexistent file");
246 my $saved_error = $@;
247 my $saved_errno = $!;
248 ok(!$rv, "do returns false on io errror");
249 ok(!$saved_error, "\$\@ not set on io error");
250 ok($saved_errno, "\$! set on io error");
253 # do subname should not be do "subname"
256 sub fungi { $called .= "fungible" }
257 $@ = "scrimptious scrobblings";
259 is $called, "fungible", "do-file does not force bareword";
260 isnt $@, "scrimptious scrobblings", "It was interpreted as do-file";
263 # do CORE () has always been do-file
266 sub CORE { $called .= "fungible" }
267 $@ = "scromptious scrimblings";
269 is $called, "fungible", "do CORE() calls &CORE";
270 isnt $@, "scromptious scrimblings", "It was interpreted as do-file";
273 # do subname() and $subname() are no longer allowed
275 sub subname { fail('do subname('. ($_[0] || '') .') called') };
276 my $subref = sub { fail('do $subref('. ($_[0] || '') .') called') };
277 foreach my $mode (qw(subname("arg") subname() $subref("arg") $subref())) {
279 like $@, qr/\Asyntax error/, "do $mode is syntax error";