[gitmo/Mouse.git] / lib / Mouse / PurePerl.pm

package Mouse::PurePerl;

require Mouse::Util;

package Mouse::Util;

use strict;
use warnings;

use warnings FATAL => 'redefine'; # to avoid to load Mouse::PurePerl

use B ();

sub is_class_loaded {
    my $class = shift;

    return 0 if ref($class) || !defined($class) || !length($class);

    # walk the symbol table tree to avoid autovififying
    # \*{${main::}{"Foo::"}{"Bar::"}} == \*main::Foo::Bar::

    my $pack = \%::;
    foreach my $part (split('::', $class)) {
        $part .= '::';
        return 0 if !exists $pack->{$part};

        my $entry = \$pack->{$part};
        return 0 if ref($entry) ne 'GLOB';
        $pack = *{$entry}{HASH};
    }

    return 0 if !%{$pack};

    # check for $VERSION or @ISA
    return 1 if exists $pack->{VERSION}
             && defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} };
    return 1 if exists $pack->{ISA}
             && defined *{$pack->{ISA}}{ARRAY} && @{ $pack->{ISA} } != 0;

    # check for any method
    foreach my $name( keys %{$pack} ) {
        my $entry = \$pack->{$name};
        return 1 if ref($entry) ne 'GLOB' || defined *{$entry}{CODE};
    }

    # fail
    return 0;
}


# taken from Sub::Identify
sub get_code_info {
    my ($coderef) = @_;
    ref($coderef) or return;

    my $cv = B::svref_2object($coderef);
    $cv->isa('B::CV') or return;

    my $gv = $cv->GV;
    $gv->isa('B::GV') or return;

    return ($gv->STASH->NAME, $gv->NAME);
}

sub get_code_package{
    my($coderef) = @_;

    my $cv = B::svref_2object($coderef);
    $cv->isa('B::CV') or return '';

    my $gv = $cv->GV;
    $gv->isa('B::GV') or return '';

    return $gv->STASH->NAME;
}

sub get_code_ref{
    my($package, $name) = @_;
    no strict 'refs';
    no warnings 'once';
    use warnings FATAL => 'uninitialized';
    return *{$package . '::' . $name}{CODE};
}

sub generate_isa_predicate_for {
    my($for_class, $name) = @_;

    my $predicate = sub{ Scalar::Util::blessed($_[0]) && $_[0]->isa($for_class) };

    if(defined $name){
        no strict 'refs';
        *{ caller() . '::' . $name } = $predicate;
        return;
    }

    return $predicate;
}

sub generate_can_predicate_for {
    my($methods_ref, $name) = @_;

    my @methods = @{$methods_ref};

    my $predicate = sub{
        my($instance) = @_;
        if(Scalar::Util::blessed($instance)){
            foreach my $method(@methods){
                if(!$instance->can($method)){
                    return 0;
                }
            }
            return 1;
        }
        return 0;
    };

    if(defined $name){
        no strict 'refs';
        *{ caller() . '::' . $name } = $predicate;
        return;
    }

    return $predicate;
}

package Mouse::Util::TypeConstraints;

use Scalar::Util qw(blessed looks_like_number openhandle);

sub Any        { 1 }
sub Item       { 1 }

sub Bool       { $_[0] ? $_[0] eq '1' : 1 }
sub Undef      { !defined($_[0]) }
sub Defined    {  defined($_[0])  }
sub Value      {  defined($_[0]) && !ref($_[0]) }
sub Num        { !ref($_[0]) && looks_like_number($_[0]) }
sub Int        {  defined($_[0]) && !ref($_[0]) && $_[0] =~ /^-?[0-9]+$/ }
sub Str        {
    my($value) = @_;
    return defined($value) && ref(\$value) eq 'SCALAR';
}

sub Ref        { ref($_[0]) }
sub ScalarRef  {
    my($value) = @_;
    return ref($value) eq 'SCALAR'
}
sub ArrayRef   { ref($_[0]) eq 'ARRAY'  }
sub HashRef    { ref($_[0]) eq 'HASH'   }
sub CodeRef    { ref($_[0]) eq 'CODE'   }
sub RegexpRef  { ref($_[0]) eq 'Regexp' }
sub GlobRef    { ref($_[0]) eq 'GLOB'   }

sub FileHandle {
    return openhandle($_[0])  || (blessed($_[0]) && $_[0]->isa("IO::Handle"))
}

sub Object     { blessed($_[0]) && blessed($_[0]) ne 'Regexp' }

sub ClassName  { Mouse::Util::is_class_loaded($_[0]) }
sub RoleName   { (Mouse::Util::class_of($_[0]) || return 0)->isa('Mouse::Meta::Role') }

sub _parameterize_ArrayRef_for {
    my($type_parameter) = @_;
    my $check = $type_parameter->_compiled_type_constraint;

    return sub {
        foreach my $value (@{$_}) {
            return undef unless $check->($value);
        }
        return 1;
    }
}

sub _parameterize_HashRef_for {
    my($type_parameter) = @_;
    my $check = $type_parameter->_compiled_type_constraint;

    return sub {
        foreach my $value(values %{$_}){
            return undef unless $check->($value);
        }
        return 1;
    };
}

# 'Maybe' type accepts 'Any', so it requires parameters
sub _parameterize_Maybe_for {
    my($type_parameter) = @_;
    my $check = $type_parameter->_compiled_type_constraint;

    return sub{
        return !defined($_) || $check->($_);
    };
};


package Mouse::Meta::Module;

sub name          { $_[0]->{package} }

sub _method_map   { $_[0]->{methods} }
sub _attribute_map{ $_[0]->{attributes} }

sub namespace{
    my $name = $_[0]->{package};
    no strict 'refs';
    return \%{ $name . '::' };
}

sub add_method {
    my($self, $name, $code) = @_;

    if(!defined $name){
        $self->throw_error('You must pass a defined name');
    }
    if(!defined $code){
        $self->throw_error('You must pass a defined code');
    }

    if(ref($code) ne 'CODE'){
        $code = \&{$code}; # coerce
    }

    $self->{methods}->{$name} = $code; # Moose stores meta object here.

    my $pkg = $self->name;
    no strict 'refs';
    no warnings 'redefine', 'once';
    *{ $pkg . '::' . $name } = $code;
    return;
}

package Mouse::Meta::Class;

sub method_metaclass    { $_[0]->{method_metaclass}    || 'Mouse::Meta::Method'    }
sub attribute_metaclass { $_[0]->{attribute_metaclass} || 'Mouse::Meta::Attribute' }

sub constructor_class { $_[0]->{constructor_class} || 'Mouse::Meta::Method::Constructor' }
sub destructor_class  { $_[0]->{destructor_class}  || 'Mouse::Meta::Method::Destructor'  }

sub is_anon_class{
    return exists $_[0]->{anon_serial_id};
}

sub roles { $_[0]->{roles} }

sub linearized_isa { @{ get_linear_isa($_[0]->{package}) } }

sub get_all_attributes {
    my($self) = @_;
    my %attrs = map { %{ $self->initialize($_)->{attributes} } } reverse $self->linearized_isa;
    return values %attrs;
}

sub new_object {
    my $self = shift;
    my %args = (@_ == 1 ? %{$_[0]} : @_);

    my $object = bless {}, $self->name;

    $self->_initialize_object($object, \%args);
    return $object;
}

sub _initialize_object{
    my($self, $object, $args, $ignore_triggers) = @_;

    my @triggers_queue;

    foreach my $attribute ($self->get_all_attributes) {
        my $init_arg = $attribute->init_arg;
        my $slot     = $attribute->name;

        if (defined($init_arg) && exists($args->{$init_arg})) {
            $object->{$slot} = $attribute->_coerce_and_verify($args->{$init_arg}, $object);

            weaken($object->{$slot})
                if ref($object->{$slot}) && $attribute->is_weak_ref;

            if ($attribute->has_trigger) {
                push @triggers_queue, [ $attribute->trigger, $object->{$slot} ];
            }
        }
        else { # no init arg
            if ($attribute->has_default || $attribute->has_builder) {
                if (!$attribute->is_lazy) {
                    my $default = $attribute->default;
                    my $builder = $attribute->builder;
                    my $value =   $builder                ? $object->$builder()
                                : ref($default) eq 'CODE' ? $object->$default()
                                :                           $default;

                    $object->{$slot} = $attribute->_coerce_and_verify($value, $object);

                    weaken($object->{$slot})
                        if ref($object->{$slot}) && $attribute->is_weak_ref;
                }
            }
            elsif($attribute->is_required) {
                $self->throw_error("Attribute (".$attribute->name.") is required");
            }
        }
    }

    if(!$ignore_triggers){
        foreach my $trigger_and_value(@triggers_queue){
            my($trigger, $value) = @{$trigger_and_value};
            $trigger->($object, $value);
        }
    }

    if($self->is_anon_class){
        $object->{__METACLASS__} = $self;
    }

    return;
}

sub is_immutable {  $_[0]->{is_immutable} }

sub __strict_constructor{ $_[0]->{strict_constructor} }

package Mouse::Meta::Role;

sub method_metaclass{ $_[0]->{method_metaclass} || 'Mouse::Meta::Role::Method' }

sub is_anon_role{
    return exists $_[0]->{anon_serial_id};
}

sub get_roles { $_[0]->{roles} }

package Mouse::Meta::Attribute;

require Mouse::Meta::Method::Accessor;

sub accessor_metaclass{ $_[0]->{accessor_metaclass} || 'Mouse::Meta::Method::Accessor' }

# readers

sub name                 { $_[0]->{name}                   }
sub associated_class     { $_[0]->{associated_class}       }

sub accessor             { $_[0]->{accessor}               }
sub reader               { $_[0]->{reader}                 }
sub writer               { $_[0]->{writer}                 }
sub predicate            { $_[0]->{predicate}              }
sub clearer              { $_[0]->{clearer}                }
sub handles              { $_[0]->{handles}                }

sub _is_metadata         { $_[0]->{is}                     }
sub is_required          { $_[0]->{required}               }
sub default              { $_[0]->{default}                }
sub is_lazy              { $_[0]->{lazy}                   }
sub is_lazy_build        { $_[0]->{lazy_build}             }
sub is_weak_ref          { $_[0]->{weak_ref}               }
sub init_arg             { $_[0]->{init_arg}               }
sub type_constraint      { $_[0]->{type_constraint}        }

sub trigger              { $_[0]->{trigger}                }
sub builder              { $_[0]->{builder}                }
sub should_auto_deref    { $_[0]->{auto_deref}             }
sub should_coerce        { $_[0]->{coerce}                 }

sub documentation        { $_[0]->{documentation}          }

# predicates

sub has_accessor         { exists $_[0]->{accessor}        }
sub has_reader           { exists $_[0]->{reader}          }
sub has_writer           { exists $_[0]->{writer}          }
sub has_predicate        { exists $_[0]->{predicate}       }
sub has_clearer          { exists $_[0]->{clearer}         }
sub has_handles          { exists $_[0]->{handles}         }

sub has_default          { exists $_[0]->{default}         }
sub has_type_constraint  { exists $_[0]->{type_constraint} }
sub has_trigger          { exists $_[0]->{trigger}         }
sub has_builder          { exists $_[0]->{builder}         }

sub has_documentation    { exists $_[0]->{documentation}   }

sub _process_options{
    my($class, $name, $args) = @_;

    # taken from Class::MOP::Attribute::new

    defined($name)
        or $class->throw_error('You must provide a name for the attribute');

    if(!exists $args->{init_arg}){
        $args->{init_arg} = $name;
    }

    # 'required' requires eigher 'init_arg', 'builder', or 'default'
    my $can_be_required = defined( $args->{init_arg} );

    if(exists $args->{builder}){
        # XXX:
        # Moose refuses a CODE ref builder, but Mouse doesn't for backward compatibility
        # This feature will be changed in a future. (gfx)
        $class->throw_error('builder must be a defined scalar value which is a method name')
            #if ref $args->{builder} || !defined $args->{builder};
            if !defined $args->{builder};

        $can_be_required++;
    }
    elsif(exists $args->{default}){
        if(ref $args->{default} && ref($args->{default}) ne 'CODE'){
            $class->throw_error("References are not allowed as default values, you must "
                              . "wrap the default of '$name' in a CODE reference (ex: sub { [] } and not [])");
        }
        $can_be_required++;
    }

    if( $args->{required} && !$can_be_required ) {
        $class->throw_error("You cannot have a required attribute ($name) without a default, builder, or an init_arg");
    }

    # taken from Mouse::Meta::Attribute->new and ->_process_args

    if(exists $args->{is}){
        my $is = $args->{is};

        if($is eq 'ro'){
            $args->{reader} ||= $name;
        }
        elsif($is eq 'rw'){
            if(exists $args->{writer}){
                $args->{reader} ||= $name;
             }
             else{
                $args->{accessor} ||= $name;
             }
        }
        elsif($is eq 'bare'){
            # do nothing, but don't complain (later) about missing methods
        }
        else{
            $is = 'undef' if !defined $is;
            $class->throw_error("I do not understand this option (is => $is) on attribute ($name)");
        }
    }

    my $tc;
    if(exists $args->{isa}){
        $tc = $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($args->{isa});
    }

    if(exists $args->{does}){
        if(defined $tc){ # both isa and does supplied
            my $does_ok = do{
                local $@;
                eval{ "$tc"->does($args) };
            };
            if(!$does_ok){
                $class->throw_error("Cannot have both an isa option and a does option because '$tc' does not do '$args->{does}' on attribute ($name)");
            }
        }
        else {
            $tc = $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_does_type_constraint($args->{does});
        }
    }

    if($args->{coerce}){
        defined($tc)
            || $class->throw_error("You cannot have coercion without specifying a type constraint on attribute ($name)");

        $args->{weak_ref}
            && $class->throw_error("You cannot have a weak reference to a coerced value on attribute ($name)");
    }

    if ($args->{lazy_build}) {
        exists($args->{default})
            && $class->throw_error("You can not use lazy_build and default for the same attribute ($name)");

        $args->{lazy}      = 1;
        $args->{builder} ||= "_build_${name}";
        if ($name =~ /^_/) {
            $args->{clearer}   ||= "_clear${name}";
            $args->{predicate} ||= "_has${name}";
        }
        else {
            $args->{clearer}   ||= "clear_${name}";
            $args->{predicate} ||= "has_${name}";
        }
    }

    if ($args->{auto_deref}) {
        defined($tc)
            || $class->throw_error("You cannot auto-dereference without specifying a type constraint on attribute ($name)");

        ( $tc->is_a_type_of('ArrayRef') || $tc->is_a_type_of('HashRef') )
            || $class->throw_error("You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($name)");
    }

    if (exists $args->{trigger}) {
        ('CODE' eq ref $args->{trigger})
            || $class->throw_error("Trigger must be a CODE ref on attribute ($name)");
    }

    if ($args->{lazy}) {
        (exists $args->{default} || defined $args->{builder})
            || $class->throw_error("You cannot have lazy attribute ($name) without specifying a default value for it");
    }

    return;
}


package Mouse::Meta::TypeConstraint;

sub name    { $_[0]->{name}    }
sub parent  { $_[0]->{parent}  }
sub message { $_[0]->{message} }

sub type_parameter { $_[0]->{type_parameter} }
sub __is_parameterized { exists $_[0]->{type_parameter} }

sub _compiled_type_constraint{ $_[0]->{compiled_type_constraint} }

sub _compiled_type_coercion  { $_[0]->{_compiled_type_coercion}  }

sub has_coercion{ exists $_[0]->{_compiled_type_coercion} }


sub compile_type_constraint{
    my($self) = @_;

    # add parents first
    my @checks;
    for(my $parent = $self->{parent}; defined $parent; $parent = $parent->{parent}){
         if($parent->{hand_optimized_type_constraint}){
            unshift @checks, $parent->{hand_optimized_type_constraint};
            last; # a hand optimized constraint must include all the parents
        }
        elsif($parent->{constraint}){
            unshift @checks, $parent->{constraint};
        }
    }

    # then add child
    if($self->{constraint}){
        push @checks, $self->{constraint};
    }

    if($self->{type_constraints}){ # Union
        my @types = map{ $_->{compiled_type_constraint} } @{ $self->{type_constraints} };
        push @checks, sub{
            foreach my $c(@types){
                return 1 if $c->($_[0]);
            }
            return 0;
        };
    }

    if(@checks == 0){
        $self->{compiled_type_constraint} = \&Mouse::Util::TypeConstraints::Any;
    }
    else{
        $self->{compiled_type_constraint} =  sub{
            my(@args) = @_;
            local $_ = $args[0];
            foreach my $c(@checks){
                return undef if !$c->(@args);
            }
            return 1;
        };
    }
    return;
}

package Mouse::Object;


sub BUILDARGS {
    my $class = shift;

    if (scalar @_ == 1) {
        (ref($_[0]) eq 'HASH')
            || $class->meta->throw_error("Single parameters to new() must be a HASH ref");

        return {%{$_[0]}};
    }
    else {
        return {@_};
    }
}

sub new {
    my $class = shift;

    $class->meta->throw_error('Cannot call new() on an instance') if ref $class;

    my $args = $class->BUILDARGS(@_);

    my $meta = Mouse::Meta::Class->initialize($class);
    my $self = $meta->new_object($args);

    # BUILDALL
    if( $self->can('BUILD') ) {
        for my $class (reverse $meta->linearized_isa) {
            my $build = Mouse::Util::get_code_ref($class, 'BUILD')
                || next;

            $self->$build($args);
        }
    }

    return $self;
}

sub DESTROY {
    my $self = shift;

    return unless $self->can('DEMOLISH'); # short circuit

    local $?;

    my $e = do{
        local $@;
        eval{

            # DEMOLISHALL

            # We cannot count on being able to retrieve a previously made
            # metaclass, _or_ being able to make a new one during global
            # destruction. However, we should still be able to use mro at
            # that time (at least tests suggest so ;)

            foreach my $class (@{ Mouse::Util::get_linear_isa(ref $self) }) {
                my $demolish = Mouse::Util::get_code_ref($class, 'DEMOLISH')
                    || next;

                $self->$demolish($Mouse::Util::in_global_destruction);
            }
        };
        $@;
    };

    no warnings 'misc';
    die $e if $e; # rethrow
}

sub BUILDALL {
    my $self = shift;

    # short circuit
    return unless $self->can('BUILD');

    for my $class (reverse $self->meta->linearized_isa) {
        my $build = Mouse::Util::get_code_ref($class, 'BUILD')
            || next;

        $self->$build(@_);
    }
    return;
}

sub DEMOLISHALL;
*DEMOLISHALL = \&DESTROY;

1;
__END__

=head1 NAME

Mouse::PurePerl - A Mouse guts in pure Perl

=head1 VERSION

This document describes Mouse version 0.50_03

=head1 SEE ALSO

L<Mouse::XS>

=cut
Commit	Line	Data
ccb38d0b	1	package Mouse::PurePerl;
ccb38d0b	2
a52cca04	3	require Mouse::Util;
a52cca04	4
6fffa617	5	package Mouse::Util;
df6dd016	6
	7	use strict;
	8	use warnings;
	9
	10	use warnings FATAL => 'redefine'; # to avoid to load Mouse::PurePerl
	11
	12	use B ();
	13
	14	sub is_class_loaded {
	15	my $class = shift;
	16
	17	return 0 if ref($class) \|\| !defined($class) \|\| !length($class);
	18
	19	# walk the symbol table tree to avoid autovififying
3bb9e54e	20	# \{${main::}{"Foo::"}{"Bar::"}} == \main::Foo::Bar::
df6dd016	21
	22	my $pack = \%::;
	23	foreach my $part (split('::', $class)) {
3bb9e54e	24	$part .= '::';
	25	return 0 if !exists $pack->{$part};
	26
	27	my $entry = \$pack->{$part};
df6dd016	28	return 0 if ref($entry) ne 'GLOB';
3bb9e54e	29	$pack = *{$entry}{HASH};
df6dd016	30	}
df6dd016	31
3bb9e54e	32	return 0 if !%{$pack};
3bb9e54e	33
df6dd016	34	# check for $VERSION or @ISA
	35	return 1 if exists $pack->{VERSION}
	36	&& defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} };
	37	return 1 if exists $pack->{ISA}
	38	&& defined *{$pack->{ISA}}{ARRAY} && @{ $pack->{ISA} } != 0;
	39
	40	# check for any method
	41	foreach my $name( keys %{$pack} ) {
	42	my $entry = \$pack->{$name};
	43	return 1 if ref($entry) ne 'GLOB' \|\| defined *{$entry}{CODE};
	44	}
	45
	46	# fail
	47	return 0;
	48	}
	49
	50
	51	# taken from Sub::Identify
	52	sub get_code_info {
	53	my ($coderef) = @_;
	54	ref($coderef) or return;
	55
	56	my $cv = B::svref_2object($coderef);
	57	$cv->isa('B::CV') or return;
	58
	59	my $gv = $cv->GV;
	60	$gv->isa('B::GV') or return;
	61
	62	return ($gv->STASH->NAME, $gv->NAME);
	63	}
	64
	65	sub get_code_package{
	66	my($coderef) = @_;
	67
	68	my $cv = B::svref_2object($coderef);
	69	$cv->isa('B::CV') or return '';
	70
	71	my $gv = $cv->GV;
	72	$gv->isa('B::GV') or return '';
	73
	74	return $gv->STASH->NAME;
	75	}
	76
7d96ae4d	77	sub get_code_ref{
	78	my($package, $name) = @_;
	79	no strict 'refs';
	80	no warnings 'once';
	81	use warnings FATAL => 'uninitialized';
	82	return *{$package . '::' . $name}{CODE};
	83	}
	84
e3540312	85	sub generate_isa_predicate_for {
1d5ecd5f	86	my($for_class, $name) = @_;
1d5ecd5f	87
f48920c1	88	my $predicate = sub{ Scalar::Util::blessed($_[0]) && $_[0]->isa($for_class) };
1d5ecd5f	89
	90	if(defined $name){
	91	no strict 'refs';
	92	*{ caller() . '::' . $name } = $predicate;
	93	return;
	94	}
	95
	96	return $predicate;
	97	}
	98
ebe91068	99	sub generate_can_predicate_for {
	100	my($methods_ref, $name) = @_;
	101
	102	my @methods = @{$methods_ref};
	103
	104	my $predicate = sub{
	105	my($instance) = @_;
	106	if(Scalar::Util::blessed($instance)){
	107	foreach my $method(@methods){
	108	if(!$instance->can($method)){
	109	return 0;
	110	}
	111	}
	112	return 1;
	113	}
	114	return 0;
	115	};
	116
	117	if(defined $name){
	118	no strict 'refs';
	119	*{ caller() . '::' . $name } = $predicate;
	120	return;
	121	}
	122
	123	return $predicate;
	124	}
1d5ecd5f	125
6fffa617	126	package Mouse::Util::TypeConstraints;
f48920c1	127
	128	use Scalar::Util qw(blessed looks_like_number openhandle);
	129
7d96ae4d	130	sub Any { 1 }
7d96ae4d	131	sub Item { 1 }
7d96ae4d	132
	133	sub Bool { $_[0] ? $_[0] eq '1' : 1 }
	134	sub Undef { !defined($_[0]) }
	135	sub Defined { defined($_[0]) }
	136	sub Value { defined($_[0]) && !ref($_[0]) }
	137	sub Num { !ref($_[0]) && looks_like_number($_[0]) }
	138	sub Int { defined($_[0]) && !ref($_[0]) && $_[0] =~ /^-?[0-9]+$/ }
9848d3e1	139	sub Str {
	140	my($value) = @_;
	141	return defined($value) && ref(\$value) eq 'SCALAR';
	142	}
7d96ae4d	143
7d96ae4d	144	sub Ref { ref($_[0]) }
9848d3e1	145	sub ScalarRef {
	146	my($value) = @_;
	147	return ref($value) eq 'SCALAR'
	148	}
7d96ae4d	149	sub ArrayRef { ref($_[0]) eq 'ARRAY' }
	150	sub HashRef { ref($_[0]) eq 'HASH' }
	151	sub CodeRef { ref($_[0]) eq 'CODE' }
	152	sub RegexpRef { ref($_[0]) eq 'Regexp' }
	153	sub GlobRef { ref($_[0]) eq 'GLOB' }
	154
	155	sub FileHandle {
9848d3e1	156	return openhandle($_[0]) \|\| (blessed($_[0]) && $_[0]->isa("IO::Handle"))
7d96ae4d	157	}
	158
	159	sub Object { blessed($_[0]) && blessed($_[0]) ne 'Regexp' }
	160
	161	sub ClassName { Mouse::Util::is_class_loaded($_[0]) }
	162	sub RoleName { (Mouse::Util::class_of($_[0]) \|\| return 0)->isa('Mouse::Meta::Role') }
	163
619338ac	164	sub _parameterize_ArrayRef_for {
	165	my($type_parameter) = @_;
	166	my $check = $type_parameter->_compiled_type_constraint;
	167
	168	return sub {
	169	foreach my $value (@{$_}) {
	170	return undef unless $check->($value);
	171	}
	172	return 1;
	173	}
	174	}
	175
	176	sub _parameterize_HashRef_for {
	177	my($type_parameter) = @_;
	178	my $check = $type_parameter->_compiled_type_constraint;
	179
	180	return sub {
	181	foreach my $value(values %{$_}){
	182	return undef unless $check->($value);
	183	}
	184	return 1;
	185	};
	186	}
	187
	188	# 'Maybe' type accepts 'Any', so it requires parameters
	189	sub _parameterize_Maybe_for {
	190	my($type_parameter) = @_;
	191	my $check = $type_parameter->_compiled_type_constraint;
	192
	193	return sub{
	194	return !defined($_) \|\| $check->($_);
	195	};
	196	};
	197
	198
7d96ae4d	199
6fffa617	200	package Mouse::Meta::Module;
43165725	201
926404f2	202	sub name { $_[0]->{package} }
	203
	204	sub _method_map { $_[0]->{methods} }
c5f6ad05	205	sub _attribute_map{ $_[0]->{attributes} }
43165725	206
2591e962	207	sub namespace{
	208	my $name = $_[0]->{package};
	209	no strict 'refs';
	210	return \%{ $name . '::' };
	211	}
	212
3e44140b	213	sub add_method {
	214	my($self, $name, $code) = @_;
	215
	216	if(!defined $name){
	217	$self->throw_error('You must pass a defined name');
	218	}
	219	if(!defined $code){
	220	$self->throw_error('You must pass a defined code');
	221	}
	222
	223	if(ref($code) ne 'CODE'){
	224	$code = \&{$code}; # coerce
	225	}
	226
	227	$self->{methods}->{$name} = $code; # Moose stores meta object here.
	228
	229	my $pkg = $self->name;
	230	no strict 'refs';
	231	no warnings 'redefine', 'once';
	232	*{ $pkg . '::' . $name } = $code;
	233	return;
	234	}
	235
6fffa617	236	package Mouse::Meta::Class;
43165725	237
e058b279	238	sub method_metaclass { $_[0]->{method_metaclass} \|\| 'Mouse::Meta::Method' }
	239	sub attribute_metaclass { $_[0]->{attribute_metaclass} \|\| 'Mouse::Meta::Attribute' }
	240
	241	sub constructor_class { $_[0]->{constructor_class} \|\| 'Mouse::Meta::Method::Constructor' }
	242	sub destructor_class { $_[0]->{destructor_class} \|\| 'Mouse::Meta::Method::Destructor' }
4e7e3250	243
43165725	244	sub is_anon_class{
	245	return exists $_[0]->{anon_serial_id};
	246	}
	247
	248	sub roles { $_[0]->{roles} }
	249
cccb83de	250	sub linearized_isa { @{ get_linear_isa($_[0]->{package}) } }
cccb83de	251
da4432f3	252	sub get_all_attributes {
da4432f3	253	my($self) = @_;
047d7af0	254	my %attrs = map { %{ $self->initialize($_)->{attributes} } } reverse $self->linearized_isa;
da4432f3	255	return values %attrs;
	256	}
	257
ba153b33	258	sub new_object {
	259	my $self = shift;
	260	my %args = (@_ == 1 ? %{$_[0]} : @_);
	261
	262	my $object = bless {}, $self->name;
	263
	264	$self->_initialize_object($object, \%args);
	265	return $object;
	266	}
	267
4e7e3250	268	sub _initialize_object{
	269	my($self, $object, $args, $ignore_triggers) = @_;
	270
	271	my @triggers_queue;
	272
	273	foreach my $attribute ($self->get_all_attributes) {
	274	my $init_arg = $attribute->init_arg;
	275	my $slot = $attribute->name;
	276
	277	if (defined($init_arg) && exists($args->{$init_arg})) {
	278	$object->{$slot} = $attribute->_coerce_and_verify($args->{$init_arg}, $object);
	279
	280	weaken($object->{$slot})
	281	if ref($object->{$slot}) && $attribute->is_weak_ref;
	282
	283	if ($attribute->has_trigger) {
	284	push @triggers_queue, [ $attribute->trigger, $object->{$slot} ];
	285	}
	286	}
	287	else { # no init arg
	288	if ($attribute->has_default \|\| $attribute->has_builder) {
	289	if (!$attribute->is_lazy) {
	290	my $default = $attribute->default;
	291	my $builder = $attribute->builder;
	292	my $value = $builder ? $object->$builder()
	293	: ref($default) eq 'CODE' ? $object->$default()
	294	: $default;
	295
	296	$object->{$slot} = $attribute->_coerce_and_verify($value, $object);
	297
	298	weaken($object->{$slot})
	299	if ref($object->{$slot}) && $attribute->is_weak_ref;
	300	}
	301	}
	302	elsif($attribute->is_required) {
	303	$self->throw_error("Attribute (".$attribute->name.") is required");
	304	}
	305	}
	306	}
	307
	308	if(!$ignore_triggers){
	309	foreach my $trigger_and_value(@triggers_queue){
	310	my($trigger, $value) = @{$trigger_and_value};
	311	$trigger->($object, $value);
	312	}
	313	}
	314
	315	if($self->is_anon_class){
	316	$object->{__METACLASS__} = $self;
	317	}
	318
	319	return;
	320	}
	321
80efe911	322	sub is_immutable { $_[0]->{is_immutable} }
4e7e3250	323
e128626c	324	sub __strict_constructor{ $_[0]->{strict_constructor} }
e128626c	325
6fffa617	326	package Mouse::Meta::Role;
43165725	327
e058b279	328	sub method_metaclass{ $_[0]->{method_metaclass} \|\| 'Mouse::Meta::Role::Method' }
e058b279	329
43165725	330	sub is_anon_role{
	331	return exists $_[0]->{anon_serial_id};
	332	}
	333
	334	sub get_roles { $_[0]->{roles} }
	335
6fffa617	336	package Mouse::Meta::Attribute;
43165725	337
e058b279	338	require Mouse::Meta::Method::Accessor;
	339
	340	sub accessor_metaclass{ $_[0]->{accessor_metaclass} \|\| 'Mouse::Meta::Method::Accessor' }
43165725	341
	342	# readers
	343
	344	sub name { $_[0]->{name} }
	345	sub associated_class { $_[0]->{associated_class} }
	346
	347	sub accessor { $_[0]->{accessor} }
	348	sub reader { $_[0]->{reader} }
	349	sub writer { $_[0]->{writer} }
	350	sub predicate { $_[0]->{predicate} }
	351	sub clearer { $_[0]->{clearer} }
	352	sub handles { $_[0]->{handles} }
	353
	354	sub _is_metadata { $_[0]->{is} }
	355	sub is_required { $_[0]->{required} }
	356	sub default { $_[0]->{default} }
	357	sub is_lazy { $_[0]->{lazy} }
	358	sub is_lazy_build { $_[0]->{lazy_build} }
	359	sub is_weak_ref { $_[0]->{weak_ref} }
	360	sub init_arg { $_[0]->{init_arg} }
	361	sub type_constraint { $_[0]->{type_constraint} }
	362
	363	sub trigger { $_[0]->{trigger} }
	364	sub builder { $_[0]->{builder} }
	365	sub should_auto_deref { $_[0]->{auto_deref} }
	366	sub should_coerce { $_[0]->{coerce} }
	367
d899d3e7	368	sub documentation { $_[0]->{documentation} }
d899d3e7	369
43165725	370	# predicates
	371
	372	sub has_accessor { exists $_[0]->{accessor} }
	373	sub has_reader { exists $_[0]->{reader} }
	374	sub has_writer { exists $_[0]->{writer} }
	375	sub has_predicate { exists $_[0]->{predicate} }
	376	sub has_clearer { exists $_[0]->{clearer} }
	377	sub has_handles { exists $_[0]->{handles} }
	378
	379	sub has_default { exists $_[0]->{default} }
	380	sub has_type_constraint { exists $_[0]->{type_constraint} }
	381	sub has_trigger { exists $_[0]->{trigger} }
	382	sub has_builder { exists $_[0]->{builder} }
	383
d899d3e7	384	sub has_documentation { exists $_[0]->{documentation} }
d899d3e7	385
ba1f50a2	386	sub _process_options{
	387	my($class, $name, $args) = @_;
	388
	389	# taken from Class::MOP::Attribute::new
	390
	391	defined($name)
	392	or $class->throw_error('You must provide a name for the attribute');
	393
	394	if(!exists $args->{init_arg}){
	395	$args->{init_arg} = $name;
	396	}
	397
	398	# 'required' requires eigher 'init_arg', 'builder', or 'default'
	399	my $can_be_required = defined( $args->{init_arg} );
	400
	401	if(exists $args->{builder}){
	402	# XXX:
	403	# Moose refuses a CODE ref builder, but Mouse doesn't for backward compatibility
	404	# This feature will be changed in a future. (gfx)
	405	$class->throw_error('builder must be a defined scalar value which is a method name')
	406	#if ref $args->{builder} \|\| !defined $args->{builder};
	407	if !defined $args->{builder};
	408
	409	$can_be_required++;
	410	}
	411	elsif(exists $args->{default}){
	412	if(ref $args->{default} && ref($args->{default}) ne 'CODE'){
	413	$class->throw_error("References are not allowed as default values, you must "
	414	. "wrap the default of '$name' in a CODE reference (ex: sub { [] } and not [])");
	415	}
	416	$can_be_required++;
	417	}
	418
	419	if( $args->{required} && !$can_be_required ) {
	420	$class->throw_error("You cannot have a required attribute ($name) without a default, builder, or an init_arg");
	421	}
	422
	423	# taken from Mouse::Meta::Attribute->new and ->_process_args
	424
	425	if(exists $args->{is}){
	426	my $is = $args->{is};
	427
	428	if($is eq 'ro'){
	429	$args->{reader} \|\|= $name;
	430	}
	431	elsif($is eq 'rw'){
	432	if(exists $args->{writer}){
	433	$args->{reader} \|\|= $name;
	434	}
	435	else{
	436	$args->{accessor} \|\|= $name;
	437	}
	438	}
	439	elsif($is eq 'bare'){
	440	# do nothing, but don't complain (later) about missing methods
	441	}
	442	else{
	443	$is = 'undef' if !defined $is;
	444	$class->throw_error("I do not understand this option (is => $is) on attribute ($name)");
	445	}
	446	}
	447
	448	my $tc;
	449	if(exists $args->{isa}){
d503a4f3	450	$tc = $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($args->{isa});
ba1f50a2	451	}
d503a4f3	452
	453	if(exists $args->{does}){
	454	if(defined $tc){ # both isa and does supplied
	455	my $does_ok = do{
	456	local $@;
	457	eval{ "$tc"->does($args) };
	458	};
	459	if(!$does_ok){
	460	$class->throw_error("Cannot have both an isa option and a does option because '$tc' does not do '$args->{does}' on attribute ($name)");
	461	}
	462	}
	463	else {
	464	$tc = $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_does_type_constraint($args->{does});
	465	}
ba1f50a2	466	}
ba1f50a2	467
	468	if($args->{coerce}){
	469	defined($tc)
	470	\|\| $class->throw_error("You cannot have coercion without specifying a type constraint on attribute ($name)");
	471
	472	$args->{weak_ref}
	473	&& $class->throw_error("You cannot have a weak reference to a coerced value on attribute ($name)");
	474	}
	475
	476	if ($args->{lazy_build}) {
	477	exists($args->{default})
	478	&& $class->throw_error("You can not use lazy_build and default for the same attribute ($name)");
	479
	480	$args->{lazy} = 1;
	481	$args->{builder} \|\|= "_build_${name}";
	482	if ($name =~ /^_/) {
	483	$args->{clearer} \|\|= "_clear${name}";
	484	$args->{predicate} \|\|= "_has${name}";
	485	}
	486	else {
	487	$args->{clearer} \|\|= "clear_${name}";
	488	$args->{predicate} \|\|= "has_${name}";
	489	}
	490	}
	491
	492	if ($args->{auto_deref}) {
	493	defined($tc)
	494	\|\| $class->throw_error("You cannot auto-dereference without specifying a type constraint on attribute ($name)");
	495
	496	( $tc->is_a_type_of('ArrayRef') \|\| $tc->is_a_type_of('HashRef') )
	497	\|\| $class->throw_error("You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($name)");
	498	}
	499
	500	if (exists $args->{trigger}) {
	501	('CODE' eq ref $args->{trigger})
	502	\|\| $class->throw_error("Trigger must be a CODE ref on attribute ($name)");
	503	}
	504
	505	if ($args->{lazy}) {
	506	(exists $args->{default} \|\| defined $args->{builder})
	507	\|\| $class->throw_error("You cannot have lazy attribute ($name) without specifying a default value for it");
	508	}
	509
	510	return;
	511	}
	512
	513
6fffa617	514	package Mouse::Meta::TypeConstraint;
43165725	515
	516	sub name { $_[0]->{name} }
	517	sub parent { $_[0]->{parent} }
	518	sub message { $_[0]->{message} }
	519
fc83f4cf	520	sub type_parameter { $_[0]->{type_parameter} }
	521	sub __is_parameterized { exists $_[0]->{type_parameter} }
	522
43165725	523	sub _compiled_type_constraint{ $_[0]->{compiled_type_constraint} }
43165725	524
93540011	525	sub _compiled_type_coercion { $_[0]->{_compiled_type_coercion} }
df6dd016	526
93540011	527	sub has_coercion{ exists $_[0]->{_compiled_type_coercion} }
df6dd016	528
f790c46b	529
	530	sub compile_type_constraint{
	531	my($self) = @_;
	532
	533	# add parents first
	534	my @checks;
	535	for(my $parent = $self->{parent}; defined $parent; $parent = $parent->{parent}){
	536	if($parent->{hand_optimized_type_constraint}){
	537	unshift @checks, $parent->{hand_optimized_type_constraint};
	538	last; # a hand optimized constraint must include all the parents
	539	}
	540	elsif($parent->{constraint}){
	541	unshift @checks, $parent->{constraint};
	542	}
	543	}
	544
	545	# then add child
	546	if($self->{constraint}){
	547	push @checks, $self->{constraint};
	548	}
	549
	550	if($self->{type_constraints}){ # Union
	551	my @types = map{ $_->{compiled_type_constraint} } @{ $self->{type_constraints} };
	552	push @checks, sub{
	553	foreach my $c(@types){
	554	return 1 if $c->($_[0]);
	555	}
	556	return 0;
	557	};
	558	}
	559
	560	if(@checks == 0){
	561	$self->{compiled_type_constraint} = \&Mouse::Util::TypeConstraints::Any;
	562	}
	563	else{
	564	$self->{compiled_type_constraint} = sub{
	565	my(@args) = @_;
	566	local $_ = $args[0];
	567	foreach my $c(@checks){
	568	return undef if !$c->(@args);
	569	}
	570	return 1;
	571	};
	572	}
	573	return;
	574	}
	575
6fffa617	576	package Mouse::Object;
aa2d2e2c	577
	578
	579	sub BUILDARGS {
	580	my $class = shift;
f790c46b	581
aa2d2e2c	582	if (scalar @_ == 1) {
	583	(ref($_[0]) eq 'HASH')
	584	\|\| $class->meta->throw_error("Single parameters to new() must be a HASH ref");
	585
	586	return {%{$_[0]}};
	587	}
	588	else {
	589	return {@_};
	590	}
	591	}
f790c46b	592
af04626d	593	sub new {
	594	my $class = shift;
	595
	596	$class->meta->throw_error('Cannot call new() on an instance') if ref $class;
	597
	598	my $args = $class->BUILDARGS(@_);
	599
	600	my $meta = Mouse::Meta::Class->initialize($class);
	601	my $self = $meta->new_object($args);
	602
	603	# BUILDALL
	604	if( $self->can('BUILD') ) {
	605	for my $class (reverse $meta->linearized_isa) {
	606	my $build = Mouse::Util::get_code_ref($class, 'BUILD')
	607	\|\| next;
	608
	609	$self->$build($args);
	610	}
	611	}
	612
	613	return $self;
	614	}
	615
a5c683f6	616	sub DESTROY {
	617	my $self = shift;
	618
	619	return unless $self->can('DEMOLISH'); # short circuit
	620
	621	local $?;
	622
	623	my $e = do{
	624	local $@;
	625	eval{
	626
	627	# DEMOLISHALL
	628
	629	# We cannot count on being able to retrieve a previously made
	630	# metaclass, _or_ being able to make a new one during global
	631	# destruction. However, we should still be able to use mro at
	632	# that time (at least tests suggest so ;)
	633
	634	foreach my $class (@{ Mouse::Util::get_linear_isa(ref $self) }) {
	635	my $demolish = Mouse::Util::get_code_ref($class, 'DEMOLISH')
	636	\|\| next;
	637
6514735e	638	$self->$demolish($Mouse::Util::in_global_destruction);
a5c683f6	639	}
	640	};
	641	$@;
	642	};
	643
	644	no warnings 'misc';
	645	die $e if $e; # rethrow
	646	}
	647
adb5eb76	648	sub BUILDALL {
	649	my $self = shift;
	650
	651	# short circuit
	652	return unless $self->can('BUILD');
	653
	654	for my $class (reverse $self->meta->linearized_isa) {
	655	my $build = Mouse::Util::get_code_ref($class, 'BUILD')
	656	\|\| next;
	657
	658	$self->$build(@_);
	659	}
	660	return;
	661	}
	662
	663	sub DEMOLISHALL;
	664	*DEMOLISHALL = \&DESTROY;
	665
df6dd016	666	1;
df6dd016	667	__END__
ccb38d0b	668
	669	=head1 NAME
	670
	671	Mouse::PurePerl - A Mouse guts in pure Perl
	672
	673	=head1 VERSION
	674
4bc73e47	675	This document describes Mouse version 0.50_03
ccb38d0b	676
	677	=head1 SEE ALSO
	678
	679	L<Mouse::XS>
	680
	681	=cut