package Moo::_Utils;
+no warnings 'once'; # guard against -w
+
+sub _getglob { \*{$_[0]} }
+sub _getstash { \%{"$_[0]::"} }
+
+use constant lt_5_8_3 => ( $] < 5.008003 ) ? 1 : 0;
+use constant can_haz_subname => eval { require Sub::Name };
+
use strictures 1;
+use Module::Runtime qw(require_module);
+use Devel::GlobalDestruction ();
use base qw(Exporter);
+use Moo::_mro;
-our @EXPORT = qw(_getglob _install_modifier _maybe_load_module);
+our @EXPORT = qw(
+ _getglob _install_modifier _load_module _maybe_load_module
+ _get_linear_isa _getstash _install_coderef _name_coderef
+ _unimport_coderefs _in_global_destruction
+);
-sub _getglob { no strict 'refs'; \*{$_[0]} }
+sub _in_global_destruction ();
+*_in_global_destruction = \&Devel::GlobalDestruction::in_global_destruction;
sub _install_modifier {
my ($into, $type, $name, $code) = @_;
- my $ref = ref(my $to_modify = $into->can($name));
- require Sub::Defer;
- Sub::Defer::undefer_sub($to_modify);
+ if (my $to_modify = $into->can($name)) { # CMM will throw for us if not
+ require Sub::Defer;
+ Sub::Defer::undefer_sub($to_modify);
+ }
- require Class::Method::Modifiers;
Class::Method::Modifiers::install_modifier(@_);
}
our %MAYBE_LOADED;
+sub _load_module {
+ (my $proto = $_[0]) =~ s/::/\//g;
+ return 1 if $INC{"${proto}.pm"};
+ # can't just ->can('can') because a sub-package Foo::Bar::Baz
+ # creates a 'Baz::' key in Foo::Bar's symbol table
+ my $stash = _getstash($_[0])||{};
+ return 1 if grep +(!ref($_) and *$_{CODE}), values %$stash;
+ require_module($_[0]);
+ return 1;
+}
+
sub _maybe_load_module {
return $MAYBE_LOADED{$_[0]} if exists $MAYBE_LOADED{$_[0]};
(my $proto = $_[0]) =~ s/::/\//g;
+ local $@;
if (eval { require "${proto}.pm"; 1 }) {
$MAYBE_LOADED{$_[0]} = 1;
} else {
return $MAYBE_LOADED{$_[0]};
}
+sub _get_linear_isa {
+ return mro::get_linear_isa($_[0]);
+}
+
+sub _install_coderef {
+ no warnings 'redefine';
+ *{_getglob($_[0])} = _name_coderef(@_);
+}
+
+sub _name_coderef {
+ shift if @_ > 2; # three args is (target, name, sub)
+ can_haz_subname ? Sub::Name::subname(@_) : $_[1];
+}
+
+sub _unimport_coderefs {
+ my ($target, $info) = @_;
+ return unless $info and my $exports = $info->{exports};
+ my %rev = reverse %$exports;
+ my $stash = _getstash($target);
+ foreach my $name (keys %$exports) {
+ if ($stash->{$name} and defined(&{$stash->{$name}})) {
+ if ($rev{$target->can($name)}) {
+ delete $stash->{$name};
+ }
+ }
+ }
+}
+
+sub STANDARD_DESTROY {
+ my $self = shift;
+
+ my $e = do {
+ local $?;
+ local $@;
+ eval {
+ $self->DEMOLISHALL(_in_global_destruction);
+ };
+ $@;
+ };
+
+ no warnings 'misc';
+ die $e if $e; # rethrow
+}
+
1;