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# You may distribute under the terms of either the GNU General Public License
# or the Artistic License (the same terms as Perl itself)
#
# (C) Paul Evans, 2012-2024 -- leonerd@leonerd.org.uk
use v5.26;
use warnings;
use Object::Pad 0.800;
package Tangence::Struct 0.33;
class Tangence::Struct :isa(Tangence::Meta::Struct);
use Carp;
use meta 0.004;
no warnings 'meta::experimental';
use Tangence::Type;
use Tangence::Meta::Field;
=head1 NAME
C<Tangence::Struct> - server implementation of a C<Tangence> struct
=head1 DESCRIPTION
This module is a component of L<Tangence::Server>. It is not intended for
end-user use directly.
=cut
our %STRUCTS_BY_NAME;
our %STRUCTS_BY_PERLNAME;
sub make ( $class, %args )
{
my $name = $args{name};
return $STRUCTS_BY_NAME{$name} //= $class->new( %args );
}
sub declare ( $class, $perlname, %args )
{
( my $name = $perlname ) =~ s{::}{.}g;
$name = $args{name} if $args{name};
my @fields;
for( $_ = 0; $_ < @{$args{fields}}; $_ += 2 ) {
push @fields, Tangence::Meta::Field->new(
name => $args{fields}[$_],
type => Tangence::Type->make_from_sig( $args{fields}[$_+1] ),
);
}
my $self = $class->make( name => $name );
$self->_set_perlname( $perlname );
$self->define(
fields => \@fields,
);
$STRUCTS_BY_PERLNAME{$perlname} = $self;
return $self;
}
sub declare_builtin
{
my $class = shift;
my $self = $class->declare( @_ );
$Tangence::Stream::ALWAYS_PEER_HASSTRUCT{$self->perlname} = [ $self, my $structid = ++$Tangence::Struct::BUILTIN_STRUCTIDS ];
$Tangence::Stream::BUILTIN_ID2STRUCT{$structid} = $self;
return $self;
}
sub define
{
my $self = shift;
$self->SUPER::define( @_ );
my $class = $self->perlname;
my $classmeta = meta::package->get( $class );
my @fieldnames = map { $_->name } $self->fields;
# Now construct the actual perl package
my %subs = (
new => sub ( $class, %args ) {
exists $args{$_} or croak "$class is missing $_" for @fieldnames;
bless [ @args{@fieldnames} ], $class;
},
);
$subs{$fieldnames[$_]} = do { my $i = $_; sub { shift->[$i] } } for 0 .. $#fieldnames;
foreach my $name ( keys %subs ) {
next if $classmeta->try_get_symbol( '&' . $name );
$classmeta->add_symbol( '&' . $name => $subs{$name} );
}
}
sub for_name ( $class, $name )
{
return $STRUCTS_BY_NAME{$name} // croak "Unknown Tangence::Struct for '$name'";
}
sub for_perlname ( $class, $perlname )
{
return $STRUCTS_BY_PERLNAME{$perlname} // croak "Unknown Tangence::Struct for '$perlname'";
}
field $perlname :writer(_set_perlname);
method perlname
{
return $perlname if defined $perlname;
( $perlname = $self->name ) =~ s{\.}{::}g; # s///rg in 5.14
return $perlname;
}
Tangence::Struct->declare_builtin(
"Tangence::Struct::Class",
name => "Tangence.Class",
fields => [
methods => "dict(any)",
events => "dict(any)",
properties => "dict(any)",
superclasses => "list(str)",
],
);
Tangence::Struct->declare_builtin(
"Tangence::Struct::Method",
name => "Tangence.Method",
fields => [
arguments => "list(str)",
returns => "str",
],
);
Tangence::Struct->declare_builtin(
"Tangence::Struct::Event",
name => "Tangence.Event",
fields => [
arguments => "list(str)",
],
);
Tangence::Struct->declare_builtin(
"Tangence::Struct::Property",
name => "Tangence.Property",
fields => [
dimension => "int",
type => "str",
smashed => "bool",
],
);
=head1 AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
=cut
0x55AA;
|
