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1 | package # hide from PAUSE |
2 | DBIx::Class::_Util; |
3 | |
4 | use warnings; |
5 | use strict; |
6 | |
7 | use constant SPURIOUS_VERSION_CHECK_WARNINGS => ($] < 5.010 ? 1 : 0); |
8 | |
9 | use Carp; |
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10 | use Scalar::Util qw(refaddr weaken); |
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11 | |
12 | use base 'Exporter'; |
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13 | our @EXPORT_OK = qw(sigwarn_silencer modver_gt_or_eq fail_on_internal_wantarray); |
14 | |
15 | sub sigwarn_silencer { |
16 | my $pattern = shift; |
17 | |
18 | croak "Expecting a regexp" if ref $pattern ne 'Regexp'; |
19 | |
20 | my $orig_sig_warn = $SIG{__WARN__} || sub { CORE::warn(@_) }; |
21 | |
22 | return sub { &$orig_sig_warn unless $_[0] =~ $pattern }; |
23 | } |
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24 | |
25 | sub modver_gt_or_eq { |
26 | my ($mod, $ver) = @_; |
27 | |
28 | croak "Nonsensical module name supplied" |
29 | if ! defined $mod or ! length $mod; |
30 | |
31 | croak "Nonsensical minimum version supplied" |
32 | if ! defined $ver or $ver =~ /[^0-9\.\_]/; |
33 | |
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34 | local $SIG{__WARN__} = sigwarn_silencer( qr/\Qisn't numeric in subroutine entry/ ) |
35 | if SPURIOUS_VERSION_CHECK_WARNINGS; |
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36 | |
37 | local $@; |
38 | eval { $mod->VERSION($ver) } ? 1 : 0; |
39 | } |
40 | |
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41 | { |
42 | my $list_ctx_ok_stack_marker; |
43 | |
44 | sub fail_on_internal_wantarray { |
45 | return if $list_ctx_ok_stack_marker; |
46 | |
47 | if (! defined wantarray) { |
48 | croak('fail_on_internal_wantarray() needs a tempvar to save the stack marker guard'); |
49 | } |
50 | |
51 | my $cf = 1; |
52 | while ( ( (caller($cf+1))[3] || '' ) =~ / :: (?: |
53 | |
54 | # these are public API parts that alter behavior on wantarray |
55 | search | search_related | slice | search_literal |
56 | |
57 | | |
58 | |
59 | # these are explicitly prefixed, since we only recognize them as valid |
60 | # escapes when they come from the guts of CDBICompat |
61 | CDBICompat .*? :: (?: search_where | retrieve_from_sql | retrieve_all ) |
62 | |
63 | ) $/x ) { |
64 | $cf++; |
65 | } |
66 | |
67 | if ( |
68 | (caller($cf))[0] =~ /^(?:DBIx::Class|DBICx::)/ |
69 | ) { |
70 | my $obj = shift; |
71 | |
72 | DBIx::Class::Exception->throw( sprintf ( |
73 | "Improper use of %s(0x%x) instance in list context at %s line %d\n\n\tStacktrace starts", |
74 | ref($obj), refaddr($obj), (caller($cf))[1,2] |
75 | ), 'with_stacktrace'); |
76 | } |
77 | |
78 | my $mark = []; |
79 | weaken ( $list_ctx_ok_stack_marker = $mark ); |
80 | $mark; |
81 | } |
82 | } |
83 | |
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84 | 1; |