-#!/usr/bin/env perl
package Mouse::Util;
use strict;
use warnings;
-use Exporter 'import';
+use base qw/Exporter/;
use Carp;
our @EXPORT_OK = qw(
- blessed
get_linear_isa
- looks_like_number
- openhandle
- reftype
- weaken
);
our %EXPORT_TAGS = (
all => \@EXPORT_OK,
);
-# We only have to do this nastiness if we haven't loaded XS version of
-# Mouse.pm, so check if we're running under PurePerl or not
BEGIN {
- if ($Mouse::PurePerl) {
- _install_pp_func();
+ my $impl;
+ if ($] >= 5.009_005) {
+ $impl = \&mro::get_linear_isa;
} else {
- # If we're running under XS, we can provide
- # blessed
- # looks_like_number
- # reftype
- # weaken
- # other functions need to be loaded from our respective sources
-
- if (defined &Scalar::Util::openhandle || eval { require Scalar::Util; 1 }) {
- *openhandle = \&Scalar::Util::openhandle;
- } else {
- # XXX - room for improvement
- *openhandle = sub {
- my $fh = shift;
- my $rt = reftype($fh) || '';
-
- return defined(fileno($fh)) ? $fh : undef
- if $rt eq 'IO';
-
- if (reftype(\$fh) eq 'GLOB') { # handle openhandle(*DATA)
- $fh = \(my $tmp=$fh);
- }
- elsif ($rt ne 'GLOB') {
- return undef;
- }
-
- (tied(*$fh) or defined(fileno($fh)))
- ? $fh : undef;
- };
- }
-
- if (defined &mro::get_linear_isa || eval { require MRO::Compat; 1; }) {
- *get_linear_isa = \&mro::get_linear_isa;
+ my $loaded = do {
+ local $SIG{__DIE__} = 'DEFAULT';
+ eval "require MRO::Compat; 1";
+ };
+ if ($loaded) {
+ $impl = \&mro::get_linear_isa;
} else {
- # this recurses so it isn't pretty
- my $code;
- *get_linear_isa = $code = sub {
+# VVVVV CODE TAKEN FROM MRO::COMPAT VVVVV
+ my $code; # this recurses so it isn't pretty
+ $code = sub {
no strict 'refs';
my $classname = shift;
}
return \@lin;
};
+# ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^
+ $impl = $code;
}
}
-}
-
-sub _install_pp_func {
- my %dependencies = (
- 'Scalar::Util' => {
-# VVVVV CODE TAKEN FROM SCALAR::UTIL VVVVV
- 'blessed' => do {
- *UNIVERSAL::a_sub_not_likely_to_be_here = sub {
- my $ref = ref($_[0]);
-
- # deviation from Scalar::Util
- # XS returns undef, PP returns GLOB.
- # let's make that more consistent by having PP return
- # undef if it's a GLOB. :/
-
- # \*STDOUT would be allowed as an object in PP blessed
- # but not XS
- return $ref eq 'GLOB' ? undef : $ref;
- };
-
- sub {
- local($@, $SIG{__DIE__}, $SIG{__WARN__});
- length(ref($_[0]))
- ? eval { $_[0]->a_sub_not_likely_to_be_here }
- : undef;
- },
- },
- 'looks_like_number' => sub {
- local $_ = shift;
-
- # checks from perlfaq4
- return 0 if !defined($_) or ref($_);
- return 1 if (/^[+-]?\d+$/); # is a +/- integer
- return 1 if (/^([+-]?)(?=\d|\.\d)\d*(\.\d*)?([Ee]([+-]?\d+))?$/); # a C float
- return 1 if ($] >= 5.008 and /^(Inf(inity)?|NaN)$/i) or ($] >= 5.006001 and /^Inf$/i);
-
- 0;
- },
- 'reftype' => sub {
- local($@, $SIG{__DIE__}, $SIG{__WARN__});
- my $r = shift;
- my $t;
-
- length($t = ref($r)) or return undef;
-
- # This eval will fail if the reference is not blessed
- eval { $r->a_sub_not_likely_to_be_here; 1 }
- ? do {
- $t = eval {
- # we have a GLOB or an IO. Stringify a GLOB gives it's name
- my $q = *$r;
- $q =~ /^\*/ ? "GLOB" : "IO";
- }
- or do {
- # OK, if we don't have a GLOB what parts of
- # a glob will it populate.
- # NOTE: A glob always has a SCALAR
- local *glob = $r;
- defined *glob{ARRAY} && "ARRAY"
- or defined *glob{HASH} && "HASH"
- or defined *glob{CODE} && "CODE"
- or length(ref(${$r})) ? "REF" : "SCALAR";
- }
- }
- : $t
- },
- 'openhandle' => sub {
- my $fh = shift;
- my $rt = reftype($fh) || '';
-
- return defined(fileno($fh)) ? $fh : undef
- if $rt eq 'IO';
-
- if (reftype(\$fh) eq 'GLOB') { # handle openhandle(*DATA)
- $fh = \(my $tmp=$fh);
- }
- elsif ($rt ne 'GLOB') {
- return undef;
- }
- (tied(*$fh) or defined(fileno($fh)))
- ? $fh : undef;
- },
- weaken => {
- loaded => \&Scalar::Util::weaken,
- not_loaded => sub { die "Scalar::Util required for weak reference support" },
- },
-# ^^^^^ CODE TAKEN FROM SCALAR::UTIL ^^^^^
- },
- 'MRO::Compat' => {
-# VVVVV CODE TAKEN FROM MRO::COMPAT VVVVV
- 'get_linear_isa' => {
- loaded => \&mro::get_linear_isa,
- not_loaded => do {
- # this recurses so it isn't pretty
- my $code;
- $code = sub {
- no strict 'refs';
+ no strict 'refs';
+ *{ __PACKAGE__ . '::get_linear_isa'} = $impl;
+}
- my $classname = shift;
+sub apply_all_roles {
+ my $meta = Mouse::Meta::Class->initialize(shift);
- my @lin = ($classname);
- my %stored;
- foreach my $parent (@{"$classname\::ISA"}) {
- my $plin = $code->($parent);
- foreach (@$plin) {
- next if exists $stored{$_};
- push(@lin, $_);
- $stored{$_} = 1;
- }
- }
- return \@lin;
- }
- },
- },
-# ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^
- },
- );
+ my @roles;
- my %loaded;
- for my $module_name (keys %dependencies) {
- my $loaded = do {
- local $SIG{__DIE__} = 'DEFAULT';
- eval "require $module_name; 1";
- };
-
- $loaded{$module_name} = $loaded;
+ # Basis of Data::OptList
+ my $max = scalar(@_);
+ for (my $i = 0; $i < $max ; $i++) {
+ if ($i + 1 < $max && ref($_[$i + 1])) {
+ push @roles, [ $_[$i++] => $_[$i] ];
+ } else {
+ push @roles, [ $_[$i] => {} ];
+ }
+ }
- for my $method_name (keys %{ $dependencies{ $module_name } }) {
- my $producer = $dependencies{$module_name}{$method_name};
- my $implementation;
+ foreach my $role_spec (@roles) {
+ Mouse::load_class( $role_spec->[0] );
+ }
- if (ref($producer) eq 'HASH') {
- $implementation = $loaded
- ? $producer->{loaded}
- : $producer->{not_loaded};
- }
- else {
- $implementation = $loaded
- ? $module_name->can($method_name)
- : $producer;
- }
+ ( $_->[0]->can('meta') && $_->[0]->meta->isa('Mouse::Meta::Role') )
+ || croak("You can only consume roles, "
+ . $_->[0]
+ . " is not a Moose role")
+ foreach @roles;
- no strict 'refs';
- *{ __PACKAGE__ . '::' . $method_name } = $implementation;
- }
+ if ( scalar @roles == 1 ) {
+ my ( $role, $params ) = @{ $roles[0] };
+ $role->meta->apply( $meta, ( defined $params ? %$params : () ) );
+ }
+ else {
+ Mouse::Meta::Role->combine_apply($meta, @roles);
}
-}
-
-sub apply_all_roles {
- my $meta = Mouse::Meta::Class->initialize(shift);
- my $role = shift;
- confess "Mouse::Util only supports 'apply_all_roles' on individual roles at a time" if @_;
- Mouse::load_class($role);
- $role->meta->apply($meta);
}
1;
=head3 get_linear_isa
-=head2 L<Scalar::Util>
-
-=head3 blessed
-
-=head3 looks_like_number
-
-=head3 reftype
-
-=head3 openhandle
-
-=head3 weaken
-
-C<weaken> I<must> be implemented in XS. If the user tries to use C<weaken>
-without L<Scalar::Util>, an error is thrown.
-
-=head2 Test::Exception
-
-=head3 throws_ok
-
-=head3 lives_ok
-
=cut
projects / gitmo/Mouse.git / blobdiff