1 package # hide from PAUSE
7 use constant SPURIOUS_VERSION_CHECK_WARNINGS => ($] < 5.010 ? 1 : 0);
10 package # hide from pause
18 BROKEN_FORK => ($^O eq 'MSWin32') ? 1 : 0,
20 HAS_ITHREADS => $Config{useithreads} ? 1 : 0,
22 # ::Runmode would only be loaded by DBICTest, which in turn implies t/
23 DBICTEST => eval { DBICTest::RunMode->is_author } ? 1 : 0,
25 # During 5.13 dev cycle HELEMs started to leak on copy
26 # add an escape for these perls ON SMOKERS - a user will still get death
27 PEEPEENESS => ( eval { DBICTest::RunMode->is_smoker } && ($] >= 5.013005 and $] <= 5.013006) ),
29 SHUFFLE_UNORDERED_RESULTSETS => $ENV{DBIC_SHUFFLE_UNORDERED_RESULTSETS} ? 1 : 0,
31 ASSERT_NO_INTERNAL_WANTARRAY => $ENV{DBIC_ASSERT_NO_INTERNAL_WANTARRAY} ? 1 : 0,
33 IV_SIZE => $Config{ivsize},
40 constant->import( OLD_MRO => 1 );
44 constant->import( OLD_MRO => 0 );
48 # FIXME - this is not supposed to be here
49 # Carp::Skip to the rescue soon
50 use DBIx::Class::Carp '^DBIx::Class|^DBICTest';
53 use Scalar::Util qw(weaken blessed reftype);
54 use List::Util qw(first);
58 sigwarn_silencer modver_gt_or_eq fail_on_internal_wantarray
59 refdesc refcount hrefaddr is_exception
60 UNRESOLVABLE_CONDITION
63 use constant UNRESOLVABLE_CONDITION => \ '1 = 0';
65 sub sigwarn_silencer ($) {
68 croak "Expecting a regexp" if ref $pattern ne 'Regexp';
70 my $orig_sig_warn = $SIG{__WARN__} || sub { CORE::warn(@_) };
72 return sub { &$orig_sig_warn unless $_[0] =~ $pattern };
75 sub hrefaddr ($) { sprintf '0x%x', &Scalar::Util::refaddr||0 }
78 croak "Expecting a reference" if ! length ref $_[0];
80 # be careful not to trigger stringification,
81 # reuse @_ as a scratch-pad
83 ( defined( $_[1] = blessed $_[0]) ? "$_[1]=" : '' ),
85 Scalar::Util::refaddr($_[0]),
90 croak "Expecting a reference" if ! length ref $_[0];
93 # No tempvars - must operate on $_[0], otherwise the pad
94 # will count as an extra ref
95 B::svref_2object($_[0])->REFCNT;
98 sub is_exception ($) {
101 # this is not strictly correct - an eval setting $@ to undef
102 # is *not* the same as an eval setting $@ to ''
103 # but for the sake of simplicity assume the following for
105 return 0 unless defined $e;
107 my ($not_blank, $suberror);
111 $not_blank = ($e ne '') ? 1 : 0;
116 if (defined $suberror) {
117 if (length (my $class = blessed($e) )) {
118 carp_unique( sprintf(
119 'External exception class %s implements partial (broken) overloading '
120 . 'preventing its instances from being used in simple ($x eq $y) '
121 . 'comparisons. Given Perl\'s "globally cooperative" exception '
122 . 'handling this type of brokenness is extremely dangerous on '
123 . 'exception objects, as it may (and often does) result in silent '
124 . '"exception substitution". DBIx::Class tries to work around this '
125 . 'as much as possible, but other parts of your software stack may '
126 . 'not be even aware of this. Please submit a bugreport against the '
127 . 'distribution containing %s and in the meantime apply a fix similar '
128 . 'to the one shown at %s, in order to ensure your exception handling '
129 . 'is saner application-wide. What follows is the actual error text '
130 . "as generated by Perl itself:\n\n%s\n ",
133 'http://v.gd/DBIC_overload_tempfix/',
137 # workaround, keeps spice flowing
138 $not_blank = ("$e" ne '') ? 1 : 0;
141 # not blessed yet failed the 'ne'... this makes 0 sense...
150 sub modver_gt_or_eq ($$) {
151 my ($mod, $ver) = @_;
153 croak "Nonsensical module name supplied"
154 if ! defined $mod or ! length $mod;
156 croak "Nonsensical minimum version supplied"
157 if ! defined $ver or $ver =~ /[^0-9\.\_]/;
159 local $SIG{__WARN__} = sigwarn_silencer( qr/\Qisn't numeric in subroutine entry/ )
160 if SPURIOUS_VERSION_CHECK_WARNINGS;
162 croak "$mod does not seem to provide a version (perhaps it never loaded)"
163 unless $mod->VERSION;
166 eval { $mod->VERSION($ver) } ? 1 : 0;
170 my $list_ctx_ok_stack_marker;
172 sub fail_on_internal_wantarray () {
173 return if $list_ctx_ok_stack_marker;
175 if (! defined wantarray) {
176 croak('fail_on_internal_wantarray() needs a tempvar to save the stack marker guard');
180 while ( ( (caller($cf+1))[3] || '' ) =~ / :: (?:
182 # these are public API parts that alter behavior on wantarray
183 search | search_related | slice | search_literal
187 # these are explicitly prefixed, since we only recognize them as valid
188 # escapes when they come from the guts of CDBICompat
189 CDBICompat .*? :: (?: search_where | retrieve_from_sql | retrieve_all )
195 my ($fr, $want, $argdesc);
198 $fr = [ caller($cf) ];
199 $want = ( caller($cf-1) )[5];
200 $argdesc = ref $DB::args[0]
201 ? DBIx::Class::_Util::refdesc($DB::args[0])
207 $want and $fr->[0] =~ /^(?:DBIx::Class|DBICx::)/
209 DBIx::Class::Exception->throw( sprintf (
210 "Improper use of %s instance in list context at %s line %d\n\n Stacktrace starts",
211 $argdesc, @{$fr}[1,2]
212 ), 'with_stacktrace');
216 weaken ( $list_ctx_ok_stack_marker = $mark );