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 => $Config{ivsize},
40 constant->import( OLD_MRO => 1 );
44 constant->import( OLD_MRO => 0 );
48 # FIXME - this is not supposed to be here
49 # Carp::Skip to the rescue soon
50 use DBIx::Class::Carp '^DBIx::Class|^DBICTest';
53 use Scalar::Util qw(weaken blessed reftype);
54 use List::Util qw(first);
59 sigwarn_silencer modver_gt_or_eq fail_on_internal_wantarray
60 refcount hrefaddr is_exception
61 is_plain_value is_literal_value
62 UNRESOLVABLE_CONDITION
65 use constant UNRESOLVABLE_CONDITION => \ '1 = 0';
67 sub sigwarn_silencer ($) {
70 croak "Expecting a regexp" if ref $pattern ne 'Regexp';
72 my $orig_sig_warn = $SIG{__WARN__} || sub { CORE::warn(@_) };
74 return sub { &$orig_sig_warn unless $_[0] =~ $pattern };
77 sub hrefaddr ($) { sprintf '0x%x', &Scalar::Util::refaddr }
80 croak "Expecting a reference" if ! length ref $_[0];
83 # No tempvars - must operate on $_[0], otherwise the pad
84 # will count as an extra ref
85 B::svref_2object($_[0])->REFCNT;
88 sub is_exception ($) {
91 # this is not strictly correct - an eval setting $@ to undef
92 # is *not* the same as an eval setting $@ to ''
93 # but for the sake of simplicity assume the following for
95 return 0 unless defined $e;
97 my ($not_blank, $suberror);
101 $not_blank = ($e ne '') ? 1 : 0;
106 if (defined $suberror) {
107 if (length (my $class = blessed($e) )) {
108 carp_unique( sprintf(
109 'External exception object %s=%s(%s) implements partial (broken) '
110 . 'overloading preventing it from being used in simple ($x eq $y) '
111 . 'comparisons. Given Perl\'s "globally cooperative" exception '
112 . 'handling this type of brokenness is extremely dangerous on '
113 . 'exception objects, as it may (and often does) result in silent '
114 . '"exception substitution". DBIx::Class tries to work around this '
115 . 'as much as possible, but other parts of your software stack may '
116 . 'not be even aware of this. Please submit a bugreport against the '
117 . 'distribution containing %s and in the meantime apply a fix similar '
118 . 'to the one shown at %s, in order to ensure your exception handling '
119 . 'is saner application-wide. What follows is the actual error text '
120 . "as generated by Perl itself:\n\n%s\n ",
125 'http://v.gd/DBIC_overload_tempfix/',
129 # workaround, keeps spice flowing
130 $not_blank = ("$e" ne '') ? 1 : 0;
133 # not blessed yet failed the 'ne'... this makes 0 sense...
142 sub modver_gt_or_eq ($$) {
143 my ($mod, $ver) = @_;
145 croak "Nonsensical module name supplied"
146 if ! defined $mod or ! length $mod;
148 croak "Nonsensical minimum version supplied"
149 if ! defined $ver or $ver =~ /[^0-9\.\_]/;
151 local $SIG{__WARN__} = sigwarn_silencer( qr/\Qisn't numeric in subroutine entry/ )
152 if SPURIOUS_VERSION_CHECK_WARNINGS;
154 croak "$mod does not seem to provide a version (perhaps it never loaded)"
155 unless $mod->VERSION;
158 eval { $mod->VERSION($ver) } ? 1 : 0;
161 sub is_literal_value ($) {
163 ref $_[0] eq 'SCALAR'
165 ( ref $_[0] eq 'REF' and ref ${$_[0]} eq 'ARRAY' )
169 # FIXME XSify - this can be done so much more efficiently
170 sub is_plain_value ($) {
179 # deliberately not using Devel::OverloadInfo - the checks we are
180 # intersted in are much more limited than the fullblown thing, and
181 # this is a relatively hot piece of code
183 # FIXME - DBI needs fixing to stringify regardless of DBD
185 # either has stringification which DBI SHOULD prefer out of the box
186 #first { *{$_ . '::(""'}{CODE} } @{ mro::get_linear_isa( ref $_[0] ) }
187 overload::Method($_[0], '""')
189 # has nummification and fallback is *not* disabled
191 $_[1] = first { *{"${_}::(0+"}{CODE} } @{ mro::get_linear_isa( ref $_[0] ) }
193 ( ! defined ${"$_[1]::()"} or ${"$_[1]::()"} )
201 my $list_ctx_ok_stack_marker;
203 sub fail_on_internal_wantarray {
204 return if $list_ctx_ok_stack_marker;
206 if (! defined wantarray) {
207 croak('fail_on_internal_wantarray() needs a tempvar to save the stack marker guard');
211 while ( ( (caller($cf+1))[3] || '' ) =~ / :: (?:
213 # these are public API parts that alter behavior on wantarray
214 search | search_related | slice | search_literal
218 # these are explicitly prefixed, since we only recognize them as valid
219 # escapes when they come from the guts of CDBICompat
220 CDBICompat .*? :: (?: search_where | retrieve_from_sql | retrieve_all )
227 (caller($cf))[0] =~ /^(?:DBIx::Class|DBICx::)/
231 DBIx::Class::Exception->throw( sprintf (
232 "Improper use of %s(%s) instance in list context at %s line %d\n\n\tStacktrace starts",
233 ref($obj), hrefaddr($obj), (caller($cf))[1,2]
234 ), 'with_stacktrace');
238 weaken ( $list_ctx_ok_stack_marker = $mark );