line |
stmt |
bran |
cond |
sub |
pod |
time |
code |
1
|
|
|
|
|
|
|
package Return::MultiLevel; |
2
|
|
|
|
|
|
|
|
3
|
3
|
|
|
3
|
|
230702
|
use strict; |
|
3
|
|
|
|
|
40
|
|
|
3
|
|
|
|
|
111
|
|
4
|
3
|
|
|
3
|
|
17
|
use warnings; |
|
3
|
|
|
|
|
6
|
|
|
3
|
|
|
|
|
107
|
|
5
|
3
|
|
|
3
|
|
75
|
use 5.008001; |
|
3
|
|
|
|
|
11
|
|
6
|
3
|
|
|
3
|
|
18
|
use Carp qw(confess); |
|
3
|
|
|
|
|
6
|
|
|
3
|
|
|
|
|
214
|
|
7
|
3
|
|
|
3
|
|
1420
|
use parent 'Exporter'; |
|
3
|
|
|
|
|
1077
|
|
|
3
|
|
|
|
|
17
|
|
8
|
|
|
|
|
|
|
|
9
|
|
|
|
|
|
|
# ABSTRACT: Return across multiple call levels |
10
|
|
|
|
|
|
|
our $VERSION = '0.07_01'; # TRIAL VERSION |
11
|
|
|
|
|
|
|
$VERSION = eval $VERSION; ## no critic (BuiltinFunctions::ProhibitStringyEval) |
12
|
|
|
|
|
|
|
|
13
|
|
|
|
|
|
|
our @EXPORT_OK = qw(with_return); |
14
|
|
|
|
|
|
|
|
15
|
|
|
|
|
|
|
our $_backend; |
16
|
|
|
|
|
|
|
|
17
|
|
|
|
|
|
|
sub with_return (&); |
18
|
|
|
|
|
|
|
|
19
|
|
|
|
|
|
|
if (!$ENV{RETURN_MULTILEVEL_PP} && eval { require Scope::Upper }) { |
20
|
|
|
|
|
|
|
|
21
|
|
|
|
|
|
|
*with_return = sub (&) { |
22
|
26
|
|
|
26
|
|
3464
|
my ($f) = @_; |
23
|
26
|
|
|
|
|
61
|
my $ctx = Scope::Upper::HERE(); |
24
|
|
|
|
|
|
|
my @canary = !$ENV{RETURN_MULTILEVEL_DEBUG} |
25
|
26
|
100
|
|
|
|
254
|
? '-' |
26
|
|
|
|
|
|
|
: Carp::longmess "Original call to with_return"; |
27
|
|
|
|
|
|
|
|
28
|
26
|
|
|
|
|
132
|
local $canary[0]; |
29
|
|
|
|
|
|
|
$f->(sub { |
30
|
15
|
50
|
|
15
|
|
429
|
$canary[0] and confess $canary[0] eq '-' |
|
|
100
|
|
|
|
|
|
31
|
|
|
|
|
|
|
? "" |
32
|
|
|
|
|
|
|
: "Captured stack:\n$canary[0]\n", |
33
|
|
|
|
|
|
|
"Attempt to re-enter dead call frame"; |
34
|
14
|
|
|
|
|
117
|
Scope::Upper::unwind(@_, $ctx); |
35
|
|
|
|
|
|
|
}) |
36
|
26
|
|
|
|
|
92
|
}; |
37
|
|
|
|
|
|
|
|
38
|
|
|
|
|
|
|
$_backend = 'XS'; |
39
|
|
|
|
|
|
|
|
40
|
|
|
|
|
|
|
} else { |
41
|
|
|
|
|
|
|
|
42
|
|
|
|
|
|
|
*_label_at = do { |
43
|
|
|
|
|
|
|
my $_label_prefix = '_' . __PACKAGE__ . '_'; |
44
|
|
|
|
|
|
|
$_label_prefix =~ tr/A-Za-z0-9_/_/cs; |
45
|
|
|
|
|
|
|
|
46
|
|
|
|
|
|
|
sub { $_label_prefix . $_[0] }; |
47
|
|
|
|
|
|
|
}; |
48
|
|
|
|
|
|
|
|
49
|
|
|
|
|
|
|
our @_trampoline_cache; |
50
|
|
|
|
|
|
|
|
51
|
|
|
|
|
|
|
*_get_trampoline = sub { |
52
|
|
|
|
|
|
|
my ($i) = @_; |
53
|
|
|
|
|
|
|
my $label = _label_at($i); |
54
|
|
|
|
|
|
|
( |
55
|
|
|
|
|
|
|
$label, |
56
|
|
|
|
|
|
|
$_trampoline_cache[$i] ||= eval ## no critic (BuiltinFunctions::ProhibitStringyEval) |
57
|
|
|
|
|
|
|
qq{ |
58
|
|
|
|
|
|
|
sub { |
59
|
|
|
|
|
|
|
my \$rr = shift; |
60
|
|
|
|
|
|
|
my \$fn = shift; |
61
|
|
|
|
|
|
|
return &\$fn; |
62
|
|
|
|
|
|
|
$label: splice \@\$rr |
63
|
|
|
|
|
|
|
} |
64
|
|
|
|
|
|
|
}, |
65
|
|
|
|
|
|
|
) |
66
|
|
|
|
|
|
|
}; |
67
|
|
|
|
|
|
|
|
68
|
|
|
|
|
|
|
our $_depth = 0; |
69
|
|
|
|
|
|
|
|
70
|
|
|
|
|
|
|
*with_return = sub (&) { |
71
|
|
|
|
|
|
|
my ($f) = @_; |
72
|
|
|
|
|
|
|
my ($label, $trampoline) = _get_trampoline($_depth); |
73
|
|
|
|
|
|
|
local $_depth = $_depth + 1; |
74
|
|
|
|
|
|
|
my @canary = !$ENV{RETURN_MULTILEVEL_DEBUG} |
75
|
|
|
|
|
|
|
? '-' |
76
|
|
|
|
|
|
|
: Carp::longmess "Original call to with_return"; |
77
|
|
|
|
|
|
|
|
78
|
|
|
|
|
|
|
local $canary[0]; |
79
|
|
|
|
|
|
|
my @ret; |
80
|
|
|
|
|
|
|
$trampoline->( |
81
|
|
|
|
|
|
|
\@ret, |
82
|
|
|
|
|
|
|
$f, |
83
|
|
|
|
|
|
|
sub { |
84
|
|
|
|
|
|
|
$canary[0] and confess $canary[0] eq '-' |
85
|
|
|
|
|
|
|
? "" |
86
|
|
|
|
|
|
|
: "Captured stack:\n$canary[0]\n", |
87
|
|
|
|
|
|
|
"Attempt to re-enter dead call frame"; |
88
|
|
|
|
|
|
|
@ret = @_; |
89
|
|
|
|
|
|
|
goto $label; |
90
|
|
|
|
|
|
|
}, |
91
|
|
|
|
|
|
|
) |
92
|
|
|
|
|
|
|
}; |
93
|
|
|
|
|
|
|
|
94
|
|
|
|
|
|
|
$_backend = 'PP'; |
95
|
|
|
|
|
|
|
} |
96
|
|
|
|
|
|
|
|
97
|
|
|
|
|
|
|
1; |
98
|
|
|
|
|
|
|
|
99
|
|
|
|
|
|
|
__END__ |