/usr/share/perl5/Method/Generate/Constructor.pm is in libmoo-perl 1.004002-1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 | package Method::Generate::Constructor;
use strictures 1;
use Sub::Quote;
use base qw(Moo::Object);
use Sub::Defer;
use B 'perlstring';
use Moo::_Utils qw(_getstash);
sub register_attribute_specs {
my ($self, @new_specs) = @_;
my $specs = $self->{attribute_specs}||={};
while (my ($name, $new_spec) = splice @new_specs, 0, 2) {
if ($name =~ s/^\+//) {
die "has '+${name}' given but no ${name} attribute already exists"
unless my $old_spec = $specs->{$name};
foreach my $key (keys %$old_spec) {
if (!exists $new_spec->{$key}) {
$new_spec->{$key} = $old_spec->{$key}
unless $key eq 'handles';
}
elsif ($key eq 'moosify') {
$new_spec->{$key} = [
map { ref $_ eq 'ARRAY' ? @$_ : $_ }
($old_spec->{$key}, $new_spec->{$key})
];
}
}
}
if (exists $new_spec->{init_arg} && !defined $new_spec->{init_arg}
&& $new_spec->{required}) {
die "${name} attribute can't be required with init_arg => undef";
}
$new_spec->{index} = scalar keys %$specs
unless defined $new_spec->{index};
$specs->{$name} = $new_spec;
}
$self;
}
sub all_attribute_specs {
$_[0]->{attribute_specs}
}
sub accessor_generator {
$_[0]->{accessor_generator}
}
sub construction_string {
my ($self) = @_;
$self->{construction_string}
||= $self->_build_construction_string;
}
sub buildall_generator {
require Method::Generate::BuildAll;
Method::Generate::BuildAll->new;
}
sub _build_construction_string {
my ($self) = @_;
my $builder = $self->{construction_builder};
$builder ? $self->$builder
: 'bless('
.$self->accessor_generator->default_construction_string
.', $class);'
}
sub install_delayed {
my ($self) = @_;
my $package = $self->{package};
defer_sub "${package}::new" => sub {
unquote_sub $self->generate_method(
$package, 'new', $self->{attribute_specs}, { no_install => 1 }
)
};
$self;
}
sub generate_method {
my ($self, $into, $name, $spec, $quote_opts) = @_;
foreach my $no_init (grep !exists($spec->{$_}{init_arg}), keys %$spec) {
$spec->{$no_init}{init_arg} = $no_init;
}
local $self->{captures} = {};
my $body = ' my $class = shift;'."\n"
.' $class = ref($class) if ref($class);'."\n";
$body .= $self->_handle_subconstructor($into, $name);
my $into_buildargs = $into->can('BUILDARGS');
if ( $into_buildargs && $into_buildargs != \&Moo::Object::BUILDARGS ) {
$body .= $self->_generate_args_via_buildargs;
} else {
$body .= $self->_generate_args;
}
$body .= $self->_check_required($spec);
$body .= ' my $new = '.$self->construction_string.";\n";
$body .= $self->_assign_new($spec);
if ($into->can('BUILD')) {
$body .= $self->buildall_generator->buildall_body_for(
$into, '$new', '$args'
);
}
$body .= ' return $new;'."\n";
if ($into->can('DEMOLISH')) {
require Method::Generate::DemolishAll;
Method::Generate::DemolishAll->new->generate_method($into);
}
quote_sub
"${into}::${name}" => $body,
$self->{captures}, $quote_opts||{}
;
}
sub _handle_subconstructor {
my ($self, $into, $name) = @_;
if (my $gen = $self->{subconstructor_handler}) {
' if ($class ne '.perlstring($into).') {'."\n".
$gen.
' }'."\n";
} else {
''
}
}
sub _cap_call {
my ($self, $code, $captures) = @_;
@{$self->{captures}}{keys %$captures} = values %$captures if $captures;
$code;
}
sub _generate_args_via_buildargs {
my ($self) = @_;
q{ my $args = $class->BUILDARGS(@_);}."\n"
.q{ die "BUILDARGS did not return a hashref" unless ref($args) eq 'HASH';}
."\n";
}
# inlined from Moo::Object - update that first.
sub _generate_args {
my ($self) = @_;
return <<'_EOA';
my $args;
if ( scalar @_ == 1 ) {
unless ( defined $_[0] && ref $_[0] eq 'HASH' ) {
die "Single parameters to new() must be a HASH ref"
." data => ". $_[0] ."\n";
}
$args = { %{ $_[0] } };
}
elsif ( @_ % 2 ) {
die "The new() method for $class expects a hash reference or a key/value list."
. " You passed an odd number of arguments\n";
}
else {
$args = {@_};
}
_EOA
}
sub _assign_new {
my ($self, $spec) = @_;
my $ag = $self->accessor_generator;
my %test;
NAME: foreach my $name (sort keys %$spec) {
my $attr_spec = $spec->{$name};
next NAME unless defined($attr_spec->{init_arg})
or $ag->has_eager_default($name, $attr_spec);
$test{$name} = $attr_spec->{init_arg};
}
join '', map {
my $arg_key = perlstring($test{$_});
my $test = "exists \$args->{$arg_key}";
my $source = "\$args->{$arg_key}";
my $attr_spec = $spec->{$_};
$self->_cap_call($ag->generate_populate_set(
'$new', $_, $attr_spec, $source, $test, $test{$_},
));
} sort keys %test;
}
sub _check_required {
my ($self, $spec) = @_;
my @required_init =
map $spec->{$_}{init_arg},
grep {
my %s = %{$spec->{$_}}; # ignore required if default or builder set
$s{required} and not($s{builder} or $s{default})
} sort keys %$spec;
return '' unless @required_init;
' if (my @missing = grep !exists $args->{$_}, qw('
.join(' ',@required_init).')) {'."\n"
.q{ die "Missing required arguments: ".join(', ', sort @missing);}."\n"
." }\n";
}
use Moo;
Moo->_constructor_maker_for(__PACKAGE__)->register_attribute_specs(
attribute_specs => {
is => 'ro',
reader => 'all_attribute_specs',
},
accessor_generator => { is => 'ro' },
construction_string => { is => 'lazy' },
construction_builder => { is => 'lazy' },
subconstructor_handler => { is => 'ro' },
package => { is => 'ro' },
);
1;
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