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Dir : ~/usr/share/webmin/vendor_perl/Type/Tiny/

Edit File: Duck.pm

package Type::Tiny::Duck;

use 5.008001;
use strict;
use warnings;

BEGIN {
	$Type::Tiny::Duck::AUTHORITY = 'cpan:TOBYINK';
	$Type::Tiny::Duck::VERSION   = '2.000001';
}

$Type::Tiny::Duck::VERSION =~ tr/_//d;

use Scalar::Util qw< blessed >;

sub _croak ($;@) { require Error::TypeTiny; goto \&Error::TypeTiny::croak }

use Exporter::Tiny 1.004001 ();
use Type::Tiny::ConstrainedObject ();
our @ISA = qw( Type::Tiny::ConstrainedObject Exporter::Tiny );

sub _short_name { 'Duck' }

sub _exporter_fail {
	my ( $class, $type_name, $methods, $globals ) = @_;
	my $caller = $globals->{into};
	my $type = $class->new(
		name      => $type_name,
		methods   => [ @$methods ],
	);
	$INC{'Type/Registry.pm'}
		? 'Type::Registry'->for_class( $caller )->add_type( $type, $type_name )
		: ( $Type::Registry::DELAYED{$caller}{$type_name} = $type )
		unless( ref($caller) or $caller eq '-lexical' or $globals->{'lexical'} );
	return map +( $_->{name} => $_->{code} ), @{ $type->exportables };
}

sub new {
	my $proto = shift;
	
	my %opts = ( @_ == 1 ) ? %{ $_[0] } : @_;
	_croak "Need to supply list of methods" unless exists $opts{methods};
	
	$opts{methods} = [ $opts{methods} ] unless ref $opts{methods};
	
	if ( Type::Tiny::_USE_XS ) {
		my $methods = join ",", sort( @{ $opts{methods} } );
		my $xsub    = Type::Tiny::XS::get_coderef_for( "HasMethods[$methods]" );
		$opts{compiled_type_constraint} = $xsub if $xsub;
	}
	elsif ( Type::Tiny::_USE_MOUSE ) {
		require Mouse::Util::TypeConstraints;
		my $maker = "Mouse::Util::TypeConstraints"->can( "generate_can_predicate_for" );
		$opts{compiled_type_constraint} = $maker->( $opts{methods} ) if $maker;
	}
	
	return $proto->SUPER::new( %opts );
} #/ sub new

sub methods { $_[0]{methods} }
sub inlined { $_[0]{inlined} ||= $_[0]->_build_inlined }

sub has_inlined { !!1 }

sub _is_null_constraint { 0 }

sub _build_constraint {
	my $self    = shift;
	my @methods = @{ $self->methods };
	return sub {
		blessed( $_[0] )
			and not grep( !$_[0]->can( $_ ), @methods );
	};
}

sub _build_inlined {
	my $self    = shift;
	my @methods = @{ $self->methods };
	
	my $xsub;
	if ( Type::Tiny::_USE_XS ) {
		my $methods = join ",", sort( @{ $self->methods } );
		$xsub = Type::Tiny::XS::get_subname_for( "HasMethods[$methods]" );
	}
	
	sub {
		my $var = $_[1];
		local $" = q{ };
		
		# If $var is $_ or $_->{foo} or $foo{$_} or somesuch, then we
		# can't use it within the grep expression, so we need to save
		# it into a temporary variable ($tmp).
		my $code =
			( $var =~ /\$_/ )
			? qq{ Scalar::Util::blessed($var) and not do { my \$tmp = $var; grep(!\$tmp->can(\$_), qw/@methods/) } }
			: qq{ Scalar::Util::blessed($var) and not grep(!$var->can(\$_), qw/@methods/) };
			
		return qq{do { $Type::Tiny::SafePackage use Scalar::Util (); $code }}
			if $Type::Tiny::AvoidCallbacks;
		return "$xsub$$var$"
			if $xsub;
		$code;
	};
} #/ sub _build_inlined

sub _instantiate_moose_type {
	my $self = shift;
	my %opts = @_;
	delete $opts{parent};
	delete $opts{constraint};
	delete $opts{inlined};
	
	require Moose::Meta::TypeConstraint::DuckType;
	return "Moose::Meta::TypeConstraint::DuckType"
		->new( %opts, methods => $self->methods );
} #/ sub _instantiate_moose_type

sub validate_explain {
	my $self = shift;
	my ( $value, $varname ) = @_;
	$varname = '$_' unless defined $varname;
	
	return undef if $self->check( $value );
	return ["Not a blessed reference"] unless blessed( $value );
	
	require Type::Utils;
	return [
		sprintf(
			'"%s" requires that the reference can %s',
			$self,
			Type::Utils::english_list( map qq["$_"], @{ $self->methods } ),
		),
		map sprintf( 'The reference cannot "%s"', $_ ),
		grep !$value->can( $_ ),
		@{ $self->methods }
	];
} #/ sub validate_explain

push @Type::Tiny::CMP, sub {
	my $A = shift->find_constraining_type;
	my $B = shift->find_constraining_type;
	return Type::Tiny::CMP_UNKNOWN
		unless $A->isa( __PACKAGE__ ) && $B->isa( __PACKAGE__ );
		
	my %seen;
	for my $word ( @{ $A->methods } ) {
		$seen{$word} += 1;
	}
	for my $word ( @{ $B->methods } ) {
		$seen{$word} += 2;
	}
	
	my $values = join( '', CORE::values %seen );
	if ( $values =~ /^3*$/ ) {
		return Type::Tiny::CMP_EQUIVALENT;
	}
	elsif ( $values !~ /2/ ) {
		return Type::Tiny::CMP_SUBTYPE;
	}
	elsif ( $values !~ /1/ ) {
		return Type::Tiny::CMP_SUPERTYPE;
	}
	
	return Type::Tiny::CMP_UNKNOWN;
};

1;

__END__

=pod

=encoding utf-8

=head1 NAME

Type::Tiny::Duck - type constraints based on the "can" method

=head1 STATUS

This module is covered by the
L<Type-Tiny stability policy|Type::Tiny::Manual::Policies/"STABILITY">.

=head1 DESCRIPTION

Type constraints of the general form C<< { $_->can("method") } >>.

This package inherits from L<Type::Tiny>; see that for most documentation.
Major differences are listed below:

=head2 Attributes

=over

=item C<methods>

An arrayref of method names.

=item C<constraint>

Unlike Type::Tiny, you I<cannot> pass a constraint coderef to the constructor.
Instead rely on the default.

=item C<inlined>

Unlike Type::Tiny, you I<cannot> pass an inlining coderef to the constructor.
Instead rely on the default.

=item C<parent>

Parent is always B<Types::Standard::Object>, and cannot be passed to the
constructor.

=back

=head2 Methods

=over

=item C<< stringifies_to($constraint) >>

See L<Type::Tiny::ConstrainedObject>.

=item C<< numifies_to($constraint) >>

See L<Type::Tiny::ConstrainedObject>.

=item C<< with_attribute_values($attr1 => $constraint1, ...) >>

See L<Type::Tiny::ConstrainedObject>.

=back

=head2 Exports

Type::Tiny::Duck can be used as an exporter.

use Type::Tiny::Duck HttpClient => [ 'get', 'post' ];

This will export the following functions into your namespace:

=over

=item C<< HttpClient >>

=item C<< is_HttpClient( $value ) >>

=item C<< assert_HttpClient( $value ) >>

=item C<< to_HttpClient( $value ) >>

=back

Multiple types can be exported at once:

use Type::Tiny::Duck (
    HttpClient   => [ 'get', 'post' ],
    FtpClient    => [ 'upload', 'download' ],
  );

=head1 BUGS

Please report any bugs to
L<https://github.com/tobyink/p5-type-tiny/issues>.

=head1 SEE ALSO

L<Type::Tiny::Manual>.

L<Type::Tiny>.

L<Moose::Meta::TypeConstraint::DuckType>.

=head1 AUTHOR

Toby Inkster E<lt>tobyink@cpan.orgE<gt>.

=head1 COPYRIGHT AND LICENCE

This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.

=head1 DISCLAIMER OF WARRANTIES

THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.