/usr/lib/x86_64-linux-gnu/perl5/5.22/Mouse/Meta/Method/Accessor.pm is in libmouse-perl 2.4.5-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 | package Mouse::Meta::Method::Accessor;
use Mouse::Util qw(:meta); # enables strict and warnings
use constant _MOUSE_DEBUG => $ENV{MOUSE_DEBUG} ? 1 : 0;
sub _inline_slot{
my(undef, $self_var, $attr_name) = @_;
return sprintf '%s->{q{%s}}', $self_var, $attr_name;
}
sub _generate_accessor_any{
my($method_class, $type, $attribute, $class) = @_;
my $name = $attribute->name;
my $default = $attribute->default;
my $constraint = $attribute->type_constraint;
my $builder = $attribute->builder;
my $trigger = $attribute->trigger;
my $is_weak = $attribute->is_weak_ref;
my $should_deref = $attribute->should_auto_deref;
my $should_coerce = (defined($constraint)
&& $constraint->has_coercion
&& $attribute->should_coerce);
my $compiled_type_constraint = defined($constraint)
? $constraint->_compiled_type_constraint
: undef;
my $self = '$_[0]';
my $slot = $method_class->_inline_slot($self, $name);;
my $accessor = sprintf(qq{package %s;\n#line 1 "%s-accessor for %s (%s)"\n}, $class->name, $type, $name, __FILE__)
. "sub {\n";
if ($type eq 'rw' || $type eq 'wo') {
if($type eq 'rw'){
$accessor .=
'if (scalar(@_) >= 2) {' . "\n";
}
else{ # writer
$accessor .=
'if(@_ < 2){ Carp::confess("Not enough arguments for the writer of $name") }'.
'{' . "\n";
}
my $value = '$_[1]';
if (defined $constraint) {
if ($should_coerce) {
$accessor .=
"\n".
'my $val = $constraint->coerce('.$value.');';
$value = '$val';
}
$accessor .=
"\n".
'$compiled_type_constraint->('.$value.') or
$attribute->_throw_type_constraint_error('.$value.', $constraint);' . "\n";
}
# if there's nothing left to do for the attribute we can return during
# this setter
$accessor .= 'return ' if !$is_weak && !$trigger && !$should_deref;
$accessor .= "my \@old_value = exists $slot ? $slot : ();\n" if $trigger;
$accessor .= "$slot = $value;\n";
if ($is_weak) {
$accessor .= "Scalar::Util::weaken($slot) if ref $slot;\n";
}
if ($trigger) {
$accessor .= '$trigger->('.$self.', '.$value.', @old_value);' . "\n";
}
$accessor .= "}\n";
}
elsif($type eq 'ro') {
$accessor .= 'Carp::confess("Cannot assign a value to a read-only accessor of $name") if scalar(@_) >= 2;' . "\n";
}
else{
$class->throw_error("Unknown accessor type '$type'");
}
if ($attribute->is_lazy and $type ne 'wo') {
my $value;
if (defined $builder){
$value = "$self->\$builder()";
}
elsif (ref($default) eq 'CODE'){
$value = "$self->\$default()";
}
else{
$value = '$default';
}
$accessor .= "els" if $type eq 'rw';
$accessor .= "if(!exists $slot){\n";
if($should_coerce){
$accessor .= "$slot = \$constraint->coerce($value)";
}
elsif(defined $constraint){
$accessor .= "my \$tmp = $value;\n";
$accessor .= "\$compiled_type_constraint->(\$tmp)";
$accessor .= " || \$attribute->_throw_type_constraint_error(\$tmp, \$constraint);\n";
$accessor .= "$slot = \$tmp;\n";
}
else{
$accessor .= "$slot = $value;\n";
}
if ($is_weak) {
$accessor .= "Scalar::Util::weaken($slot) if ref $slot;\n";
}
$accessor .= "}\n";
}
if ($should_deref) {
if ($constraint->is_a_type_of('ArrayRef')) {
$accessor .= "return \@{ $slot || [] } if wantarray;\n";
}
elsif($constraint->is_a_type_of('HashRef')){
$accessor .= "return \%{ $slot || {} } if wantarray;\n";
}
else{
$class->throw_error("Can not auto de-reference the type constraint " . $constraint->name);
}
}
$accessor .= "return $slot;\n}\n";
warn $accessor if _MOUSE_DEBUG;
my $code;
my $e = do{
local $@;
$code = eval $accessor;
$@;
};
die $e if $e;
return $code;
}
sub _generate_accessor{
#my($self, $attribute, $metaclass) = @_;
my $self = shift;
return $self->_generate_accessor_any(rw => @_);
}
sub _generate_reader {
#my($self, $attribute, $metaclass) = @_;
my $self = shift;
return $self->_generate_accessor_any(ro => @_);
}
sub _generate_writer {
#my($self, $attribute, $metaclass) = @_;
my $self = shift;
return $self->_generate_accessor_any(wo => @_);
}
sub _generate_predicate {
#my($self, $attribute, $metaclass) = @_;
my(undef, $attribute) = @_;
my $slot = $attribute->name;
return sub{
return exists $_[0]->{$slot};
};
}
sub _generate_clearer {
#my($self, $attribute, $metaclass) = @_;
my(undef, $attribute) = @_;
my $slot = $attribute->name;
return sub{
delete $_[0]->{$slot};
};
}
1;
__END__
=head1 NAME
Mouse::Meta::Method::Accessor - A Mouse method generator for accessors
=head1 VERSION
This document describes Mouse version v2.4.5
=head1 SEE ALSO
L<Moose::Meta::Method::Accessor>
=cut
|