/usr/share/perl5/MouseX/NativeTraits/MethodProvider/Counter.pm is in libmousex-nativetraits-perl 1.09-2.
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 | package MouseX::NativeTraits::MethodProvider::Counter;
use Mouse;
extends qw(MouseX::NativeTraits::MethodProvider);
sub generate_reset {
my($self) = @_;
my $attr = $self->attr;
my $writer = $self->writer;
my $builder;
my $default;
if($attr->has_builder){
$builder = $attr->builder;
}
else {
$default = $attr->default;
if(ref $default){
$builder = $default;
}
}
if(ref $builder){
return sub {
my($instance) = @_;
if(@_ != 1) {
$self->argument_error('reset', 1, 1, scalar @_);
}
$writer->($instance, $instance->$builder());
};
}
else{
return sub {
my($instance) = @_;
if(@_ != 1) {
$self->argument_error('reset', 1, 1, scalar @_);
}
$writer->($instance, $default);
};
}
}
sub generate_set{
my($self) = @_;
my $writer = $self->writer;
return sub {
if(@_ != 2) {
$self->argument_error('set', 2, 2, scalar @_);
}
$writer->( $_[0], $_[1] )
};
}
sub generate_inc {
my($self) = @_;
my $reader = $self->reader;
my $writer = $self->writer;
my $constraint = $self->attr->type_constraint;
my $name = $self->attr->name;
my $optimized_inc = ( $constraint->name eq 'Int'
&& !$self->attr->trigger );
return sub {
my($instance, $value) = @_;
if(@_ == 1){
if($optimized_inc) {
return ++$instance->{$name};
}
else {
$value = 1;
}
}
elsif(@_ == 2){
$constraint->assert_valid($value);
}
else {
$self->argument_error('inc', 1, 2, scalar @_);
}
$instance->$writer($instance->$reader() + $value);
};
}
sub generate_dec {
my($self) = @_;
my $reader = $self->reader;
my $writer = $self->writer;
my $constraint = $self->attr->type_constraint;
return sub {
my($instance, $value) = @_;
if(@_ == 1){
$value = 1;
}
elsif(@_ == 2){
$constraint->assert_valid($value);
}
else {
$self->argument_error('dec', 1, 2, scalar @_);
}
$writer->($instance, $reader->($instance) - $value);
};
}
no Mouse;
__PACKAGE__->meta->make_immutable();
__END__
=head1 NAME
MouseX::NativeTraits::MethodProvider::Counter - Provides methods for Counter
=head1 DESCRIPTION
This class provides method generators for the C<Counter> trait.
See L<Mouse::Meta::Attribute::Custom::Trait::Counter> for details.
=head1 METHOD GENERATORS
=over 4
=item generate_reset
=item generate_set
=item generate_inc
=item generate_dec
=back
=head1 SEE ALSO
L<MouseX::NativeTraits>
=cut
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