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BOOTSTRAP.pm
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BOOTSTRAP.pm
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use Perl6::Metamodel;
use QRegex;
# Here we start to piece together the top of the object model hierarchy.
# We can't just declare these bits in CORE.setting with normal Perl 6
# syntax due to circularity issues. Note that we don't compose any of
# these - which is equivalent to a { ... } body.
#
# One particular circularity we break here is that you can't have
# inheritance in Perl 6 without traits, but that needs multiple
# dispatch, which can't function without some a type hierarchy in
# place. It also needs us to be able to declare a signature with
# parameters and a code objects with dispatchees, which in turn need
# attributes. So, we set up quite a few bits in here, though the aim
# is to keep it "lagom". :-)
# Bootstrapping Attribute class that we eventually replace with the real
# one.
my class BOOTSTRAPATTR {
has $!name;
has $!type;
has $!box_target;
has $!package;
method name() { $!name }
method type() { $!type }
method box_target() { $!box_target }
method package() { $!package }
method has_accessor() { 0 }
method has-accessor() { 0 }
method build() { }
method is_generic() { $!type.HOW.archetypes.generic }
method instantiate_generic($type_environment) {
my $ins := $!type.HOW.instantiate_generic($!type, $type_environment);
self.new(:name($!name), :box_target($!box_target), :type($ins))
}
method compose($obj) { }
}
# Stub all types.
my stub Mu metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Any metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Cool metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Attribute metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Scalar metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Proxy metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Signature metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Parameter metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Code metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Block metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Routine metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Sub metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Method metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Submethod metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Regex metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Str metaclass Perl6::Metamodel::ClassHOW { ... };
my knowhow bigint is repr('P6bigint') { }
my stub Int metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Num metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Parcel metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Iterable metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Iterator metaclass Perl6::Metamodel::ClassHOW { ... };
my stub ListIter metaclass Perl6::Metamodel::ClassHOW { ... };
my stub List metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Array metaclass Perl6::Metamodel::ClassHOW { ... };
my stub LoL metaclass Perl6::Metamodel::ClassHOW { ... };
my stub EnumMap metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Hash metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Capture metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Bool metaclass Perl6::Metamodel::ClassHOW { ... };
my stub ObjAt metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Stash metaclass Perl6::Metamodel::ClassHOW { ... };
my stub PROCESS metaclass Perl6::Metamodel::ModuleHOW { ... };
my stub Grammar metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Junction metaclass Perl6::Metamodel::ClassHOW { ... };
my stub Metamodel metaclass Perl6::Metamodel::PackageHOW { ... };
# We stick all the declarative bits inside of a BEGIN, so they get
# serialized.
BEGIN {
# Maps code objects to their static self, avoiding them being closures.
sub static($code) {
$code.get_lexinfo().get_static_code()
}
# class Mu { ... }
Mu.HOW.add_parrot_vtable_mapping(Mu, 'get_integer',
static(sub ($self) {
nqp::unbox_i($self.Int())
}));
Mu.HOW.add_parrot_vtable_mapping(Mu, 'get_number',
static(sub ($self) {
nqp::unbox_n($self.Num())
}));
Mu.HOW.add_parrot_vtable_mapping(Mu, 'get_string',
static(sub ($self) {
nqp::unbox_s($self.Str())
}));
Mu.HOW.add_parrot_vtable_mapping(Mu, 'defined',
static(sub ($self) { nqp::istrue($self.defined()) }));
Mu.HOW.compose_repr(Mu);
# class Any is Mu { ... }
Any.HOW.add_parent(Any, Mu);
Any.HOW.compose_repr(Any);
# class Cool is Any { ... }
Cool.HOW.add_parent(Cool, Any);
Cool.HOW.compose_repr(Cool);
# class Attribute {
# has str $!name;
# has int $!rw;
# has int $!has_accessor;
# has $!type;
# has $!container_descriptor;
# has $!auto_viv_container;
# has $!build_closure;
# has $!package;
# ... # Uncomposed
# }
Attribute.HOW.add_parent(Attribute, Any);
Attribute.HOW.add_attribute(Attribute, BOOTSTRAPATTR.new(:name<$!name>, :type(str), :package(Attribute)));
Attribute.HOW.add_attribute(Attribute, BOOTSTRAPATTR.new(:name<$!rw>, :type(int), :package(Attribute)));
Attribute.HOW.add_attribute(Attribute, BOOTSTRAPATTR.new(:name<$!ro>, :type(int), :package(Attribute)));
Attribute.HOW.add_attribute(Attribute, BOOTSTRAPATTR.new(:name<$!has_accessor>, :type(int), :package(Attribute)));
Attribute.HOW.add_attribute(Attribute, BOOTSTRAPATTR.new(:name<$!type>, :type(Mu), :package(Attribute)));
Attribute.HOW.add_attribute(Attribute, BOOTSTRAPATTR.new(:name<$!container_descriptor>, :type(Mu), :package(Attribute)));
Attribute.HOW.add_attribute(Attribute, BOOTSTRAPATTR.new(:name<$!auto_viv_container>, :type(Mu), :package(Attribute)));
Attribute.HOW.add_attribute(Attribute, BOOTSTRAPATTR.new(:name<$!build_closure>, :type(Mu), :package(Attribute)));
Attribute.HOW.add_attribute(Attribute, BOOTSTRAPATTR.new(:name<$!package>, :type(Mu), :package(Attribute)));
Attribute.HOW.add_attribute(Attribute, BOOTSTRAPATTR.new(:name<$!box_target>, :type(int), :package(Attribute)));
# Need new and accessor methods for Attribute in here for now.
Attribute.HOW.add_method(Attribute, 'new',
static(sub ($self, :$name!, :$type!, :$package!, :$has_accessor, *%other) {
my $attr := nqp::create($self);
nqp::bindattr_s($attr, Attribute, '$!name', $name);
nqp::bindattr($attr, Attribute, '$!type', $type);
nqp::bindattr_i($attr, Attribute, '$!has_accessor', $has_accessor);
nqp::bindattr($attr, Attribute, '$!package', $package);
if nqp::existskey(%other, 'container_descriptor') {
nqp::bindattr($attr, Attribute, '$!container_descriptor', %other<container_descriptor>);
if nqp::existskey(%other, 'auto_viv_container') {
nqp::bindattr($attr, Attribute, '$!auto_viv_container',
%other<auto_viv_container>);
}
}
else {
my $cd := Perl6::Metamodel::ContainerDescriptor.new(
:of($type), :rw(1), :name($name));
my $scalar := nqp::create(Scalar);
nqp::bindattr($scalar, Scalar, '$!descriptor', $cd);
nqp::bindattr($scalar, Scalar, '$!value', $type);
nqp::bindattr($attr, Attribute, '$!container_descriptor', $cd);
nqp::bindattr($attr, Attribute, '$!auto_viv_container', $scalar);
}
$attr
}));
Attribute.HOW.add_method(Attribute, 'name', static(sub ($self) {
nqp::getattr_s(nqp::decont($self),
Attribute, '$!name');
}));
Attribute.HOW.add_method(Attribute, 'type', static(sub ($self) {
nqp::getattr(nqp::decont($self),
Attribute, '$!type');
}));
Attribute.HOW.add_method(Attribute, 'container_descriptor', static(sub ($self) {
nqp::getattr(nqp::decont($self),
Attribute, '$!container_descriptor');
}));
Attribute.HOW.add_method(Attribute, 'auto_viv_container', static(sub ($self) {
nqp::getattr(nqp::decont($self),
Attribute, '$!auto_viv_container');
}));
Attribute.HOW.add_method(Attribute, 'has_accessor', static(sub ($self) {
pir::perl6_booleanize__PI(
nqp::getattr_i(nqp::decont($self),
Attribute, '$!has_accessor'));
}));
Attribute.HOW.add_method(Attribute, 'rw', static(sub ($self) {
pir::perl6_booleanize__PI(
nqp::getattr_i(nqp::decont($self),
Attribute, '$!rw'));
}));
Attribute.HOW.add_method(Attribute, 'set_rw', static(sub ($self) {
nqp::bindattr_i(nqp::decont($self),
Attribute, '$!rw', 1);
pir::perl6_booleanize__PI(1)
}));
Attribute.HOW.add_method(Attribute, 'set_readonly', static(sub ($self) {
nqp::bindattr_i(nqp::decont($self),
Attribute, '$!ro', 1);
pir::perl6_booleanize__PI(1)
}));
Attribute.HOW.add_method(Attribute, 'default_to_rw', static(sub ($self) {
my $dcself := nqp::decont($self);
unless nqp::getattr_i($dcself, Attribute, '$!ro') {
nqp::bindattr_i($dcself, Attribute, '$!rw', 1);
}
pir::perl6_booleanize__PI(1)
}));
Attribute.HOW.add_method(Attribute, 'set_build', static(sub ($self, $closure) {
pir::setattribute__0PPsP(nqp::decont($self),
Attribute, '$!build_closure', $closure);
}));
Attribute.HOW.add_method(Attribute, 'build', static(sub ($self) {
nqp::getattr(nqp::decont($self),
Attribute, '$!build_closure');
}));
Attribute.HOW.add_method(Attribute, 'set_box_target', static(sub ($self) {
nqp::bindattr_i(nqp::decont($self),
Attribute, '$!box_target', 1);
pir::perl6_booleanize__PI(1)
}));
Attribute.HOW.add_method(Attribute, 'box_target', static(sub ($self) {
nqp::getattr_i(nqp::decont($self),
Attribute, '$!box_target')
}));
Attribute.HOW.add_method(Attribute, 'is_generic', static(sub ($self) {
my $dcself := nqp::decont($self);
my $type := nqp::getattr(nqp::decont($dcself),
Attribute, '$!type');
my $package := nqp::getattr(nqp::decont($dcself),
Attribute, '$!package');
my $build := nqp::getattr(nqp::decont($dcself),
Attribute, '$!build_closure');
pir::perl6_booleanize__PI($type.HOW.archetypes.generic || $package.HOW.archetypes.generic || nqp::defined($build));
}));
Attribute.HOW.add_method(Attribute, 'instantiate_generic', static(sub ($self, $type_environment) {
my $dcself := nqp::decont($self);
my $type := nqp::getattr($dcself, Attribute, '$!type');
my $cd := nqp::getattr($dcself, Attribute, '$!container_descriptor');
my $pkg := nqp::getattr($dcself, Attribute, '$!package');
my $avc := nqp::getattr($dcself, Attribute, '$!auto_viv_container');
my $bc := nqp::getattr($dcself, Attribute, '$!build_closure');
my $ins := nqp::clone($dcself);
if $type.HOW.archetypes.generic {
nqp::bindattr($ins, Attribute, '$!type',
$type.HOW.instantiate_generic($type, $type_environment));
my $cd_ins := $cd.instantiate_generic($type_environment);
nqp::bindattr($ins, Attribute, '$!container_descriptor', $cd_ins);
my $avc_var := pir::perl6_var__PP($avc);
my $avc_copy := nqp::clone($avc_var);
my @avc_mro := $avc_var.HOW.mro($avc_var);
my $i := 0;
$i := $i + 1 while @avc_mro[$i].HOW.is_mixin(@avc_mro[$i]);
nqp::bindattr($ins, Attribute, '$!auto_viv_container',
pir::setattribute__0PPsP($avc_copy, @avc_mro[$i], '$!descriptor', $cd_ins));
}
if $pkg.HOW.archetypes.generic {
nqp::bindattr($ins, Attribute, '$!package',
$pkg.HOW.instantiate_generic($pkg, $type_environment));
}
if nqp::defined($bc) {
nqp::bindattr($ins, Attribute, '$!build_closure', $bc.clone());
}
$ins
}));
Attribute.HOW.compose_repr(Attribute);
# class Scalar is Any {
# has $!descriptor;
# has $!value;
# ...
# }
Scalar.HOW.add_parent(Scalar, Any);
Scalar.HOW.add_attribute(Scalar, BOOTSTRAPATTR.new(:name<$!descriptor>, :type(Mu), :package(Scalar)));
Scalar.HOW.add_attribute(Scalar, BOOTSTRAPATTR.new(:name<$!value>, :type(Mu), :package(Scalar)));
Scalar.HOW.add_attribute(Scalar, BOOTSTRAPATTR.new(:name<$!whence>, :type(Mu), :package(Scalar)));
Scalar.HOW.add_method(Scalar, 'is_generic', static(sub ($self) {
my $dcself := nqp::decont($self);
nqp::getattr($dcself, Scalar, '$!descriptor').is_generic()
}));
Scalar.HOW.add_method(Scalar, 'instantiate_generic', static(sub ($self, $type_environment) {
my $dcself := nqp::decont($self);
nqp::bindattr($dcself, Scalar, '$!descriptor',
nqp::getattr($dcself, Scalar, '$!descriptor').instantiate_generic(
$type_environment));
my $val := nqp::getattr($dcself, Scalar, '$!value');
if $val.HOW.archetypes.generic {
nqp::bindattr($dcself, Scalar, '$!value',
$val.HOW.instantiate_generic($val, $type_environment));
}
$self
}));
Scalar.HOW.compose_repr(Scalar);
# Scalar needs to be registered as a container type.
nqp::setcontspec(Scalar, Scalar, '$!value', nqp::null());
# class Proxy is Any {
# has &!FETCH;
# has &!STORE;
# method FETCH() { ... }
# method STORE(\$v) { ... }
# }
my $PROXY_FETCH;
Proxy.HOW.add_parent(Proxy, Any);
Proxy.HOW.add_attribute(Proxy, BOOTSTRAPATTR.new(:name<&!FETCH>, :type(Mu), :package(Proxy)));
Proxy.HOW.add_attribute(Proxy, BOOTSTRAPATTR.new(:name<&!STORE>, :type(Mu), :package(Proxy)));
Proxy.HOW.add_method(Proxy, 'FETCH', ($PROXY_FETCH := static(sub ($cont) {
nqp::decont(
nqp::getattr($cont, Proxy, '&!FETCH')(pir::perl6_var__PP($cont)))
})));
Proxy.HOW.add_method(Proxy, 'STORE', static(sub ($cont, $val) {
nqp::getattr($cont, Proxy, '&!STORE')(pir::perl6_var__PP($cont), $val)
}));
Proxy.HOW.add_method(Proxy, 'new', static(sub ($type, :$FETCH, :$STORE) {
my $cont := nqp::create(Proxy);
nqp::bindattr($cont, Proxy, '&!FETCH', $FETCH);
nqp::bindattr($cont, Proxy, '&!STORE', $STORE);
$cont
}));
Proxy.HOW.compose(Proxy);
nqp::setcontspec(Proxy, nqp::null(), '', $PROXY_FETCH);
Proxy.HOW.compose_repr(Proxy);
# Helper for creating a scalar attribute. Sets it up as a real Perl 6
# Attribute instance, complete with container desciptor and auto-viv
# container.
sub scalar_attr($name, $type, $package) {
my $cd := Perl6::Metamodel::ContainerDescriptor.new(
:of($type), :rw(1), :name($name));
my $scalar := nqp::create(Scalar);
nqp::bindattr($scalar, Scalar, '$!descriptor', $cd);
nqp::bindattr($scalar, Scalar, '$!value', $type);
return Attribute.new( :name($name), :type($type), :package($package),
:container_descriptor($cd), :auto_viv_container($scalar));
}
# class Signature {
# has $!params;
# has $!returns;
# has $!arity;
# has $!count;
# has $!code;
# ... # Uncomposed
# }
Signature.HOW.add_parent(Signature, Any);
Signature.HOW.add_attribute(Signature, BOOTSTRAPATTR.new(:name<$!params>, :type(Mu), :package(Signature)));
Signature.HOW.add_attribute(Signature, BOOTSTRAPATTR.new(:name<$!returns>, :type(Mu), :package(Signature)));
Signature.HOW.add_attribute(Signature, BOOTSTRAPATTR.new(:name<$!arity>, :type(Mu), :package(Signature)));
Signature.HOW.add_attribute(Signature, BOOTSTRAPATTR.new(:name<$!count>, :type(Mu), :package(Signature)));
Signature.HOW.add_attribute(Signature, BOOTSTRAPATTR.new(:name<$!code>, :type(Mu), :package(Signature)));
Signature.HOW.add_method(Signature, 'is_generic', static(sub ($self) {
# If any parameter is generic, so are we.
my @params := nqp::getattr($self, Signature, '$!params');
for @params {
my $is_generic := $_.is_generic();
if $is_generic { return $is_generic }
}
return pir::perl6_booleanize__PI(0);
}));
Signature.HOW.add_method(Signature, 'instantiate_generic', static(sub ($self, $type_environment) {
# Go through parameters, builidng new list. If any
# are generic, instantiate them. Otherwise leave them
# as they are.
my $ins := nqp::clone($self);
my @params := nqp::getattr($self, Signature, '$!params');
my @ins_params;
for @params {
if $_.is_generic() {
@ins_params.push($_.instantiate_generic($type_environment))
}
else {
@ins_params.push($_);
}
}
nqp::bindattr($ins, Signature, '$!params', @ins_params);
$ins
}));
Signature.HOW.add_method(Signature, 'set_returns', static(sub ($self, $type) {
nqp::bindattr(nqp::decont($self),
Signature, '$!returns', nqp::decont($type));
}));
Signature.HOW.add_method(Signature, 'has_returns', static(sub ($self) {
pir::perl6_booleanize__PI(
nqp::not_i(
nqp::isnull(
nqp::getattr(nqp::decont($self),
Signature, '$!returns')
)
)
);
}));
Signature.HOW.compose_repr(Signature);
# class Parameter {
# has str $!variable_name
# has $!named_names
# has $!type_captures
# has int $!flags
# has $!nominal_type
# has $!post_constraints
# has $!coerce_type
# has str $!coerce_method
# has $!sub_signature
# has $!default_value
# has $!container_descriptor;
# has $!attr_package;
# ... # Uncomposed
# }
Parameter.HOW.add_parent(Parameter, Any);
Parameter.HOW.add_attribute(Parameter, BOOTSTRAPATTR.new(:name<$!variable_name>, :type(str), :package(Parameter)));
Parameter.HOW.add_attribute(Parameter, BOOTSTRAPATTR.new(:name<$!named_names>, :type(Mu), :package(Parameter)));
Parameter.HOW.add_attribute(Parameter, BOOTSTRAPATTR.new(:name<$!type_captures>, :type(Mu), :package(Parameter)));
Parameter.HOW.add_attribute(Parameter, BOOTSTRAPATTR.new(:name<$!flags>, :type(int), :package(Parameter)));
Parameter.HOW.add_attribute(Parameter, BOOTSTRAPATTR.new(:name<$!nominal_type>, :type(Mu), :package(Parameter)));
Parameter.HOW.add_attribute(Parameter, BOOTSTRAPATTR.new(:name<$!post_constraints>, :type(Mu), :package(Parameter)));
Parameter.HOW.add_attribute(Parameter, BOOTSTRAPATTR.new(:name<$!coerce_type>, :type(Mu), :package(Parameter)));
Parameter.HOW.add_attribute(Parameter, BOOTSTRAPATTR.new(:name<$!coerce_method>, :type(str), :package(Parameter)));
Parameter.HOW.add_attribute(Parameter, BOOTSTRAPATTR.new(:name<$!sub_signature>, :type(Mu), :package(Parameter)));
Parameter.HOW.add_attribute(Parameter, BOOTSTRAPATTR.new(:name<$!default_value>, :type(Mu), :package(Parameter)));
Parameter.HOW.add_attribute(Parameter, BOOTSTRAPATTR.new(:name<$!container_descriptor>, :type(Mu), :package(Parameter)));
Parameter.HOW.add_attribute(Parameter, BOOTSTRAPATTR.new(:name<$!attr_package>, :type(Mu), :package(Parameter)));
Parameter.HOW.add_method(Parameter, 'is_generic', static(sub ($self) {
# If nonimnal type is generic, so are we.
my $type := nqp::getattr($self, Parameter, '$!nominal_type');
pir::perl6_booleanize__PI($type.HOW.archetypes.generic)
}));
Parameter.HOW.add_method(Parameter, 'instantiate_generic', static(sub ($self, $type_environment) {
# Clone with the type instantiated.
my $SIG_ELEM_NOMINAL_GENERIC := 524288;
my $ins := nqp::clone($self);
my $type := nqp::getattr($self, Parameter, '$!nominal_type');
my $cd := nqp::getattr($self, Parameter, '$!container_descriptor');
my $ins_type := $type.HOW.instantiate_generic($type, $type_environment);
my $ins_cd := nqp::isnull($cd) ?? $cd !! $cd.instantiate_generic($type_environment);
unless $ins_type.HOW.archetypes.generic {
my $flags := nqp::getattr_i($ins, Parameter, '$!flags');
if $flags +& $SIG_ELEM_NOMINAL_GENERIC {
nqp::bindattr_i($ins, Parameter, '$!flags',
$flags - $SIG_ELEM_NOMINAL_GENERIC)
}
}
nqp::bindattr($ins, Parameter, '$!nominal_type', $ins_type);
nqp::bindattr($ins, Parameter, '$!container_descriptor', $ins_cd);
$ins
}));
Parameter.HOW.add_method(Parameter, 'set_rw', static(sub ($self) {
my $SIG_ELEM_IS_RW := 256;
my $SIG_ELEM_IS_OPTIONAL := 2048;
my $dcself := nqp::decont($self);
my $flags := nqp::getattr_i($dcself, Parameter, '$!flags');
if $flags +& $SIG_ELEM_IS_OPTIONAL {
nqp::die("Cannot use 'is rw' on an optional parameter");
}
my $cd := nqp::getattr($dcself, Parameter, '$!container_descriptor');
if $cd { $cd.set_rw(1) }
nqp::bindattr_i($dcself, Parameter, '$!flags', $flags + $SIG_ELEM_IS_RW);
$dcself
}));
Parameter.HOW.add_method(Parameter, 'set_copy', static(sub ($self) {
my $SIG_ELEM_IS_COPY := 512;
my $dcself := nqp::decont($self);
my $cd := nqp::getattr($dcself, Parameter, '$!container_descriptor');
if $cd { $cd.set_rw(1) }
nqp::bindattr_i($dcself, Parameter, '$!flags',
nqp::getattr_i($dcself, Parameter, '$!flags') + $SIG_ELEM_IS_COPY);
$dcself
}));
Parameter.HOW.add_method(Parameter, 'set_required', static(sub ($self) {
my $SIG_ELEM_IS_OPTIONAL := 2048;
my $dcself := nqp::decont($self);
my $flags := nqp::getattr_i($dcself, Parameter, '$!flags');
if $flags +& $SIG_ELEM_IS_OPTIONAL {
nqp::bindattr_i($dcself, Parameter, '$!flags',
$flags - $SIG_ELEM_IS_OPTIONAL);
}
$dcself
}));
Parameter.HOW.add_method(Parameter, 'set_parcel', static(sub ($self) {
my $SIG_ELEM_IS_PARCEL := 1024;
my $dcself := nqp::decont($self);
my $flags := nqp::getattr_i($dcself, Parameter, '$!flags');
unless $flags +& $SIG_ELEM_IS_PARCEL {
nqp::bindattr_i($dcself, Parameter, '$!flags',
$flags + $SIG_ELEM_IS_PARCEL);
}
$dcself
}));
Parameter.HOW.add_method(Parameter, 'set_coercion', static(sub ($self, $type) {
my $dcself := nqp::decont($self);
nqp::bindattr_s($dcself, Parameter, '$!coerce_method', $type.HOW.name($type));
nqp::bindattr($dcself, Parameter, '$!coerce_type', $type);
$dcself
}));
Parameter.HOW.compose_repr(Parameter);
# class Code {
# has $!do; # Low level code object
# has $!signature; # Signature object
# ... # Uncomposed
# }
Code.HOW.add_parent(Code, Any);
Code.HOW.add_attribute(Code, BOOTSTRAPATTR.new(:name<$!do>, :type(Mu), :package(Code)));
Code.HOW.add_attribute(Code, BOOTSTRAPATTR.new(:name<$!signature>, :type(Mu), :package(Code)));
# Need clone in here, plus generics instantiation.
Code.HOW.add_method(Code, 'clone', static(sub ($self) {
my $dcself := nqp::decont($self);
my $cloned := nqp::clone($dcself);
nqp::bindattr($cloned, Code, '$!do',
pir::perl6_associate_sub_code_object__0PP(
nqp::clone(nqp::getattr($dcself, Code, '$!do')),
$cloned));
Q:PIR {
$P0 = find_lex '$dcself'
$P1 = find_lex 'Code'
$P0 = getattribute $P0, $P1, '$!do'
$P1 = getprop 'CLONE_CALLBACK', $P0
if null $P1 goto no_callback
$P2 = find_lex '$cloned'
$P1($P0, $P2)
no_callback:
};
$cloned
}));
Code.HOW.add_method(Code, 'is_generic', static(sub ($self) {
# Delegate to signature, since it contains all the type info.
my $dc_self := nqp::decont($self);
nqp::getattr($dc_self, Code, '$!signature').is_generic()
}));
Code.HOW.add_method(Code, 'instantiate_generic', static(sub ($self, $type_environment) {
# Clone the code object, then instantiate the generic signature. Also
# need to clone dispatchees list.
my $dcself := nqp::decont($self);
my $ins := $self.clone();
if nqp::defined(nqp::getattr($dcself, Routine, '$!dispatchees')) {
nqp::bindattr($ins, Routine, '$!dispatchees',
nqp::clone(nqp::getattr($dcself, Routine, '$!dispatchees')));
}
my $sig := nqp::getattr($dcself, Code, '$!signature');
nqp::bindattr($ins, Code, '$!signature',
$sig.instantiate_generic($type_environment));
$ins
}));
Code.HOW.add_method(Code, 'name', static(sub ($self) {
nqp::getcodename(nqp::getattr(nqp::decont($self),
Code, '$!do'))
}));
Code.HOW.add_method(Code, 'set_name', static(sub ($self, $name) {
nqp::setcodename(
nqp::getattr(nqp::decont($self), Code, '$!do'),
$name)
}));
Code.HOW.add_method(Code, 'id', static(sub ($self) {
nqp::where(nqp::getattr(nqp::decont($self),
Code, '$!do'))
}));
Code.HOW.compose_repr(Code);
# Need to actually run the code block. Also need this available before we finish
# up the stub.
Code.HOW.add_parrot_vtable_mapping(Code, 'invoke', nqp::null());
Code.HOW.add_parrot_vtable_handler_mapping(Code, 'invoke', '$!do');
# class Block is Code { ... }
Block.HOW.add_parent(Block, Code);
Block.HOW.add_attribute(Block, BOOTSTRAPATTR.new(:name<$!state_vars>, :type(Mu), :package(Block)));
Block.HOW.add_attribute(Block, BOOTSTRAPATTR.new(:name<$!phasers>, :type(Mu), :package(Block)));
Block.HOW.add_method(Block, 'clone', static(sub ($self) {
my $dcself := nqp::decont($self);
my $cloned := nqp::clone($dcself);
nqp::bindattr($cloned, Code, '$!do',
pir::perl6_associate_sub_code_object__0PP(
nqp::clone(nqp::getattr($dcself, Code, '$!do')),
$cloned));
Q:PIR {
$P0 = find_lex '$dcself'
$P1 = find_lex 'Code'
$P0 = getattribute $P0, $P1, '$!do'
$P1 = getprop 'CLONE_CALLBACK', $P0
if null $P1 goto no_callback
$P2 = find_lex '$cloned'
$P1($P0, $P2)
no_callback:
};
nqp::bindattr($cloned, Block, '$!state_vars', nqp::null());
$cloned
}));
Block.HOW.compose_repr(Block);
# class Routine is Block { ... }
Routine.HOW.add_parent(Routine, Block);
Routine.HOW.add_attribute(Routine, BOOTSTRAPATTR.new(:name<$!dispatchees>, :type(Mu), :package(Routine)));
Routine.HOW.add_attribute(Routine, BOOTSTRAPATTR.new(:name<$!dispatcher_cache>, :type(Mu), :package(Routine)));
Routine.HOW.add_attribute(Routine, BOOTSTRAPATTR.new(:name<$!dispatcher>, :type(Mu), :package(Routine)));
Routine.HOW.add_attribute(Routine, BOOTSTRAPATTR.new(:name<$!rw>, :type(int), :package(Routine)));
Routine.HOW.add_attribute(Routine, BOOTSTRAPATTR.new(:name<$!inline_info>, :type(Mu), :package(Routine)));
Routine.HOW.add_attribute(Routine, BOOTSTRAPATTR.new(:name<$!yada>, :type(int), :package(Routine)));
Routine.HOW.add_attribute(Routine, BOOTSTRAPATTR.new(:name<$!package>, :type(Mu), :package(Routine)));
Routine.HOW.add_attribute(Routine, BOOTSTRAPATTR.new(:name<$!onlystar>, :type(int), :package(Routine)));
Routine.HOW.add_attribute(Routine, BOOTSTRAPATTR.new(:name<$!dispatch_order>, :type(Mu), :package(Routine)));
Routine.HOW.add_attribute(Routine, BOOTSTRAPATTR.new(:name<$!dispatch_cache>, :type(Mu), :package(Routine)));
Routine.HOW.add_method(Routine, 'is_dispatcher', static(sub ($self) {
my $dc_self := nqp::decont($self);
my $disp_list := nqp::getattr($dc_self, Routine, '$!dispatchees');
pir::perl6_booleanize__PI(nqp::defined($disp_list));
}));
Routine.HOW.add_method(Routine, 'add_dispatchee', static(sub ($self, $dispatchee) {
my $dc_self := nqp::decont($self);
my $disp_list := nqp::getattr($dc_self, Routine, '$!dispatchees');
if nqp::defined($disp_list) {
$disp_list.push($dispatchee);
nqp::bindattr(nqp::decont($dispatchee),
Routine, '$!dispatcher', $dc_self);
nqp::scwbdisable();
nqp::bindattr($dc_self, Routine, '$!dispatch_order', nqp::null());
nqp::bindattr($dc_self, Routine, '$!dispatch_cache', nqp::null());
nqp::bindattr($dc_self, Routine, '$!dispatcher_cache', nqp::null());
nqp::scwbenable();
$dc_self
}
else {
nqp::die("Cannot add a dispatchee to a non-dispatcher code object");
}
}));
Routine.HOW.add_method(Routine, 'derive_dispatcher', static(sub ($self) {
my $clone := $self.clone();
nqp::bindattr($clone, Routine, '$!dispatchees',
nqp::clone(nqp::getattr($self, Routine, '$!dispatchees')));
$clone
}));
Routine.HOW.add_method(Routine, 'dispatcher', static(sub ($self) {
nqp::getattr(nqp::decont($self),
Routine, '$!dispatcher')
}));
Routine.HOW.add_method(Routine, 'dispatchees', static(sub ($self) {
nqp::getattr(nqp::decont($self),
Routine, '$!dispatchees')
}));
Routine.HOW.add_method(Routine, '!sort_dispatchees_internal', static(sub ($self) {
my int $SLURPY_ARITY := nqp::bitshiftl_i(1, 30);
my int $EDGE_REMOVAL_TODO := -1;
my int $EDGE_REMOVED := -2;
my int $DEFCON_NONE := 0;
my int $DEFCON_DEFINED := 1;
my int $DEFCON_UNDEFINED := 2;
my int $DEFCON_MASK := $DEFCON_DEFINED +| $DEFCON_UNDEFINED;
my int $TYPE_NATIVE_INT := 4;
my int $TYPE_NATIVE_NUM := 8;
my int $TYPE_NATIVE_STR := 16;
my int $TYPE_NATIVE_MASK := $TYPE_NATIVE_INT +| $TYPE_NATIVE_NUM +| $TYPE_NATIVE_STR;
my int $SIG_ELEM_SLURPY_POS := 8;
my int $SIG_ELEM_SLURPY_NAMED := 16;
my int $SIG_ELEM_MULTI_INVOCANT := 128;
my int $SIG_ELEM_IS_OPTIONAL := 2048;
my int $SIG_ELEM_IS_CAPTURE := 32768;
my int $SIG_ELEM_UNDEFINED_ONLY := 65536;
my int $SIG_ELEM_DEFINED_ONLY := 131072;
my int $SIG_ELEM_NOMINAL_GENERIC := 524288;
my int $SIG_ELEM_NATIVE_INT_VALUE := 2097152;
my int $SIG_ELEM_NATIVE_NUM_VALUE := 4194304;
my int $SIG_ELEM_NATIVE_STR_VALUE := 8388608;
# Takes two candidates and determines if the first one is narrower than the
# second. Returns a true value if they are.
sub is_narrower(%a, %b) {
# Work out how many parameters to compare, factoring in slurpiness
# and optionals.
my int $types_to_check;
if %a<num_types> == %b<num_types> {
$types_to_check := %a<num_types>;
}
elsif %a<min_arity> == %b<min_arity> {
$types_to_check := %a<num_types> > %b<num_types>
?? %b<num_types>
!! %a<num_types>;
}
elsif %a<max_arity> != $SLURPY_ARITY && %b<max_arity> == $SLURPY_ARITY {
return 1;
}
else {
return 0;
}
# Analyse each parameter in the two candidates.
my int $i := 0;
my int $narrower := 0;
my int $tied := 0;
while $i < $types_to_check {
my $type_obj_a := %a<types>[$i];
my $type_obj_b := %b<types>[$i];
if nqp::eqaddr($type_obj_a, $type_obj_b) {
# Same type; narrower if first has constraints and other doesn't;
# tied if neither has constraints or both have constraints. */
if %a<constraints>[$i] && !%b<constraints>[$i] {
$narrower++;
}
elsif (!%a<constraints>[$i] && !%b<constraints>[$i])
|| (%a<constraints>[$i] && %b<constraints>[$i]) {
$tied++;
}
}
elsif (%a<type_flags>[$i] +& $TYPE_NATIVE_MASK)
&& !(%b<type_flags>[$i] +& $TYPE_NATIVE_MASK) {
# Narrower because natives always are.
$narrower++;
}
elsif (%b<type_flags>[$i] +& $TYPE_NATIVE_MASK)
&& !(%a<type_flags>[$i] +& $TYPE_NATIVE_MASK) {
# Wider; skip over here so we don't go counting this as tied in
# the next branch.
}
else {
if nqp::istype($type_obj_a, $type_obj_b) {
# Narrower - note it and we're done.
$narrower++;
}
else {
# Make sure it's tied, rather than the other way around.
unless nqp::istype($type_obj_b, $type_obj_a) {
$tied++;
}
}
}
$i++;
}
# If one is narrower than the other from current analysis, we're done.
if $narrower >= 1 && $narrower + $tied == $types_to_check {
return 1;
}
# If they aren't tied, we're also done.
elsif $tied != $types_to_check {
return 0;
}
# Otherwise, we see if one has a slurpy and the other not. A lack of
# slurpiness makes the candidate narrower.
if %a<max_arity> != $SLURPY_ARITY && %b<max_arity> == $SLURPY_ARITY {
return 1;
}
# Also narrower if the first needs a bind check and the second doesn't, if
# we wouldn't deem the other one narrower than this one int terms of
# slurpyness. Otherwise, they're tied.
return !(%b<max_arity> != $SLURPY_ARITY && %a<max_arity> == $SLURPY_ARITY)
&& (%a<bind_check> && !%b<bind_check>);
}
my $dcself := nqp::decont($self);
my @candidates := nqp::getattr($dcself, Routine, '$!dispatchees');
# Create a node for each candidate in the graph.
my @graph;
for @candidates -> $candidate {
# Get hold of signature.
my $sig := nqp::getattr($candidate, Code, '$!signature');
my @params := nqp::getattr($sig, Signature, '$!params');
# Create it an entry.
my %info := nqp::hash(
'sub', $candidate,
'signature', $sig,
'types', [],
'type_flags', nqp::list_i(),
'constraints', [],
'min_arity', 0,
'max_arity', 0,
'num_types', 0,
);
my int $significant_param := 0;
for @params -> $param {
# If it's a required named (and not slurpy) don't need its type info
# but we will need a bindability check during the dispatch for it.
my int $flags := nqp::getattr_i($param, Parameter, '$!flags');
my $named_names := nqp::getattr($param, Parameter, '$!named_names');
unless nqp::isnull($named_names) {
if !($flags +& $SIG_ELEM_IS_OPTIONAL) {
if nqp::elems($named_names) == 1 {
%info<req_named> := nqp::atpos_s($named_names, 0);
}
}
%info<bind_check> := 1;
next;
}
# If it's got a sub-signature, also need a bind check.
unless nqp::isnull(nqp::getattr($param, Parameter, '$!sub_signature')) {
%info<bind_check> := 1;
}
# If it's named slurpy, we're done, also we don't need a bind
# check on account of nameds since we take them all.
if $flags +& $SIG_ELEM_SLURPY_NAMED {
last;
}
# Otherwise, positional or slurpy and contributes to arity.
if $flags +& $SIG_ELEM_SLURPY_POS || $flags +& $SIG_ELEM_IS_CAPTURE {
%info<max_arity> := $SLURPY_ARITY;
last;
}
elsif $flags +& $SIG_ELEM_IS_OPTIONAL {
%info<max_arity>++;
}
else {
%info<max_arity>++;
%info<min_arity>++;
}
# Record type info for this parameter.
if $flags +& $SIG_ELEM_NOMINAL_GENERIC {
%info<bind_check> := 1;
%info<types>[$significant_param] := Any;
}
else {
%info<types>[$significant_param] :=
nqp::getattr($param, Parameter, '$!nominal_type');
}
unless nqp::isnull(nqp::getattr($param, Parameter, '$!post_constraints')) {
%info<constraints>[$significant_param] := 1;
%info<bind_check> := 1;
}
if $flags +& $SIG_ELEM_MULTI_INVOCANT {
%info<num_types>++;
}
if $flags +& $SIG_ELEM_DEFINED_ONLY {
nqp::bindpos_i(%info<type_flags>, $significant_param, $DEFCON_DEFINED);
}
elsif $flags +& $SIG_ELEM_UNDEFINED_ONLY {
nqp::bindpos_i(%info<type_flags>, $significant_param, $DEFCON_UNDEFINED);
}
if $flags +& $SIG_ELEM_NATIVE_INT_VALUE {
nqp::bindpos_i(%info<type_flags>, $significant_param,
$TYPE_NATIVE_INT + nqp::atpos_i(%info<type_flags>, $significant_param));
}
elsif $flags +& $SIG_ELEM_NATIVE_NUM_VALUE {
nqp::bindpos_i(%info<type_flags>, $significant_param,
$TYPE_NATIVE_NUM + nqp::atpos_i(%info<type_flags>, $significant_param));
}
elsif $flags +& $SIG_ELEM_NATIVE_STR_VALUE {
nqp::bindpos_i(%info<type_flags>, $significant_param,
$TYPE_NATIVE_STR + nqp::atpos_i(%info<type_flags>, $significant_param));
}
$significant_param++;
}
# Add it to graph node, and initialize list of edges.
nqp::push(@graph, nqp::hash(
'info', %info,
'edges', [],
'edges_in', 0,
'edges_out', 0
));
}
# Now analyze type narrowness of the candidates relative to each other
# and create the edges.
my int $i := 0;
my int $j;
my int $n := nqp::elems(@candidates);
while $i < $n {
$j := 0;
while $j < $n {
unless $i == $j {
if is_narrower(@graph[$i]<info>, @graph[$j]<info>) {
@graph[$i]<edges>[@graph[$i]<edges_out>] := @graph[$j];
@graph[$i]<edges_out>++;
@graph[$j]<edges_in>++;
}
}
$j++;
}
$i++;
}
# Perform the topological sort.
my int $candidates_to_sort := nqp::elems(@candidates);
my @result;
while $candidates_to_sort > 0 {
my int $rem_results := nqp::elems(@result);
# Find any nodes that have no incoming edges and add them to
# results.
$i := 0;
while $i < $n {
if @graph[$i]<edges_in> == 0 {
# Add to results.
nqp::push(@result, @graph[$i]<info>);
$candidates_to_sort--;
@graph[$i]<edges_in> := $EDGE_REMOVAL_TODO;
}
$i++;
}
if $rem_results == nqp::elems(@result) {
nqp::die("Circularity detected in multi sub types");
}
# Now we need to decrement edges in counts for things that had
# edges from candidates we added here.
$i := 0;
while $i < $n {
if @graph[$i]<edges_in> == $EDGE_REMOVAL_TODO {
$j := 0;
while $j < @graph[$i]<edges_out> {
@graph[$i]<edges>[$j]<edges_in>--;
$j++;
}
@graph[$i]<edges_in> := $EDGE_REMOVED;
}
$i++;
}
# This is end of a tied group, so leave a gap.
nqp::push(@result, Mu);
}
# Add final null sentinel.
nqp::push(@result, Mu);
@result
}));
Routine.HOW.add_method(Routine, 'sort_dispatchees', static(sub ($self) {
my $dcself := nqp::decont($self);
unless nqp::isnull(nqp::getattr($dcself, Routine, '$!dispatch_order')) {
nqp::bindattr($dcself, Routine, '$!dispatch_order',
$self.'!sort_dispatchees_internal'());
}
}));
Routine.HOW.add_method(Routine, 'find_best_dispatchee', static(sub ($self, $capture, int $many = 0) {
my int $DEFCON_DEFINED := 1;
my int $DEFCON_UNDEFINED := 2;
my int $DEFCON_MASK := $DEFCON_DEFINED +| $DEFCON_UNDEFINED;
my int $TYPE_NATIVE_INT := 4;
my int $TYPE_NATIVE_NUM := 8;
my int $TYPE_NATIVE_STR := 16;
my int $TYPE_NATIVE_MASK := $TYPE_NATIVE_INT +| $TYPE_NATIVE_NUM +| $TYPE_NATIVE_STR;
my int $BIND_VAL_OBJ := 0;
my int $BIND_VAL_INT := 1;
my int $BIND_VAL_NUM := 2;
my int $BIND_VAL_STR := 3;
# Count arguments.
my int $num_args := nqp::captureposelems($capture);
# Get list and number of candidates, triggering a sort if there are none.
my $dcself := nqp::decont($self);
my @candidates := nqp::getattr($dcself, Routine, '$!dispatch_order');
if nqp::isnull(@candidates) {
nqp::scwbdisable();
@candidates := $dcself.'!sort_dispatchees_internal'();
nqp::bindattr($dcself, Routine, '$!dispatch_order', @candidates);
nqp::scwbenable();
}
my $num_candidates := nqp::elems(@candidates);
# Iterate over the candidates and collect best ones; terminate
# when we see two type objects (indicating end).
my int $cur_idx := 0;
my $cur_candidate;
my int $type_check_count;
my int $type_mismatch;
my int $i;
my int $pure_type_result := 1;
my $many_res := $many ?? [] !! Mu;
my @possibles;
my int $done := 0;
until $done {
$cur_candidate := nqp::atpos(@candidates, $cur_idx);
if nqp::isconcrete($cur_candidate) {
# Check if it's admissable by arity.
unless $num_args < nqp::atkey($cur_candidate, 'min_arity')
|| $num_args > nqp::atkey($cur_candidate, 'max_arity') {
# Arity OK; now check if it's admissable by type.
$type_check_count := nqp::atkey($cur_candidate, 'num_types') > $num_args
?? $num_args
!! nqp::atkey($cur_candidate, 'num_types');
$type_mismatch := 0;
$i := 0;
while $i < $type_check_count && !$type_mismatch {
my $type_obj := nqp::atpos(nqp::atkey($cur_candidate, 'types'), $i);
my $type_flags := nqp::atpos_i(nqp::atkey($cur_candidate, 'type_flags'), $i);
my int $got_prim := nqp::captureposprimspec($capture, $i);
if $type_flags +& $TYPE_NATIVE_MASK {
# Looking for a natively typed value. Did we get one?
if $got_prim == $BIND_VAL_OBJ {
# Object; won't do.
$type_mismatch := 1;
}
elsif (($type_flags +& $TYPE_NATIVE_INT) && $got_prim != $BIND_VAL_INT) ||
(($type_flags +& $TYPE_NATIVE_NUM) && $got_prim != $BIND_VAL_NUM) ||
(($type_flags +& $TYPE_NATIVE_STR) && $got_prim != $BIND_VAL_STR) {
# Mismatch.
$type_mismatch := 1;
}
}
else {
my $param;
if $got_prim == $BIND_VAL_OBJ {
$param := pir::perl6ize_type__PP(
nqp::captureposarg($capture, $i));
}