xref: /openbsd/gnu/usr.bin/perl/t/op/goto.t (revision 133306f0) 
1#!./perl
2
3# "This IS structured code.  It's just randomly structured."
4
5print "1..16\n";
6
7while ($?) {
8    $foo = 1;
9  label1:
10    $foo = 2;
11    goto label2;
12} continue {
13    $foo = 0;
14    goto label4;
15  label3:
16    $foo = 4;
17    goto label4;
18}
19goto label1;
20
21$foo = 3;
22
23label2:
24print "#1\t:$foo: == 2\n";
25if ($foo == 2) {print "ok 1\n";} else {print "not ok 1\n";}
26goto label3;
27
28label4:
29print "#2\t:$foo: == 4\n";
30if ($foo == 4) {print "ok 2\n";} else {print "not ok 2\n";}
31
32$PERL = ($^O eq 'MSWin32') ? '.\perl' : './perl';
33$CMD = qq[$PERL -e "goto foo;" 2>&1 ];
34$x = `$CMD`;
35
36if ($x =~ /label/) {print "ok 3\n";} else {print "not ok 3\n";}
37
38sub foo {
39    goto bar;
40    print "not ok 4\n";
41    return;
42bar:
43    print "ok 4\n";
44}
45
46&foo;
47
48sub bar {
49    $x = 'bypass';
50    eval "goto $x";
51}
52
53&bar;
54exit;
55
56FINALE:
57print "ok 13\n";
58
59# does goto LABEL handle block contexts correctly?
60
61my $cond = 1;
62for (1) {
63    if ($cond == 1) {
64	$cond = 0;
65	goto OTHER;
66    }
67    elsif ($cond == 0) {
68      OTHER:
69	$cond = 2;
70	print "ok 14\n";
71	goto THIRD;
72    }
73    else {
74      THIRD:
75	print "ok 15\n";
76    }
77}
78print "ok 16\n";
79exit;
80
81bypass:
82print "ok 5\n";
83
84# Test autoloading mechanism.
85
86sub two {
87    ($pack, $file, $line) = caller;	# Should indicate original call stats.
88    print "@_ $pack $file $line" eq "1 2 3 main $FILE $LINE"
89	? "ok 7\n"
90	: "not ok 7\n";
91}
92
93sub one {
94    eval <<'END';
95    sub one { print "ok 6\n"; goto &two; print "not ok 6\n"; }
96END
97    goto &one;
98}
99
100$FILE = __FILE__;
101$LINE = __LINE__ + 1;
102&one(1,2,3);
103
104$wherever = NOWHERE;
105eval { goto $wherever };
106print $@ =~ /Can't find label NOWHERE/ ? "ok 8\n" : "not ok 8\n";
107
108# see if a modified @_ propagates
109{
110  package Foo;
111  sub DESTROY	{ my $s = shift; print "ok $s->[0]\n"; }
112  sub show	{ print "# @_\nnot ok $_[0][0]\n" if @_ != 5; }
113  sub start	{ push @_, 1, "foo", {}; goto &show; }
114  for (9..11)	{ start(bless([$_]), 'bar'); }
115}
116
117sub auto {
118    goto &loadit;
119}
120
121sub AUTOLOAD { print @_ }
122
123auto("ok 12\n");
124
125$wherever = FINALE;
126goto $wherever;
127