/
Attribute.pm
165 lines (154 loc) · 5.79 KB
/
Attribute.pm
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my class Attribute { # declared in BOOTSTRAP
# class Attribute is Any
# has str $!name;
# has int $!rw;
# has int $!has_accessor;
# has Mu $!type;
# has Mu $!container_descriptor;
# has Mu $!auto_viv_container;
# has Mu $!build_closure;
# has Mu $!package;
# has int $!inlined;
# has int $!positional_delegate;
# has int $!associative_delegate;
# has Mu $!why;
# has $!required;
# has Mu $!container_initializer;
method compose(Mu $package, :$compiler_services) {
# Generate accessor method, if we're meant to have one.
if self.has_accessor {
my str $name = nqp::unbox_s(self.name);
my $meth_name := nqp::substr($name, 2);
unless $package.^declares_method($meth_name) {
my $dcpkg := nqp::decont($package);
my $meth;
my int $attr_type = nqp::objprimspec($!type);
# Get the compiler to generate us an accessor when possible.
if $compiler_services.DEFINITE {
$meth := $compiler_services.generate_accessor($meth_name,
$dcpkg, $name, $!type, self.rw ?? 1 !! 0);
}
# No compiler services available, so do it as a closure.
elsif self.rw {
$meth := nqp::p6bool(nqp::iseq_i($attr_type, 0))
??
method (Mu:D \fles:) is raw {
nqp::getattr(nqp::decont(fles), $dcpkg, $name)
}
!!
nqp::p6bool(nqp::iseq_i($attr_type, 1))
??
method (Mu:D \fles:) is raw {
nqp::getattrref_i(nqp::decont(fles), $dcpkg, $name)
}
!!
nqp::p6bool(nqp::iseq_i($attr_type, 2))
??
method (Mu:D \fles:) is raw {
nqp::getattrref_n(nqp::decont(fles), $dcpkg, $name)
}
!!
method (Mu:D \fles:) is raw {
nqp::getattrref_s(nqp::decont(fles), $dcpkg, $name)
}
$meth.set_name($meth_name);
} else {
# ro accessor
$meth := nqp::p6bool(nqp::iseq_i($attr_type, 0))
??
method (Mu:D \fles:) {
nqp::getattr(nqp::decont(fles), $dcpkg, $name)
}
!!
nqp::p6bool(nqp::iseq_i($attr_type, 1))
??
method (Mu:D \fles:) {
nqp::p6box_i(
nqp::getattr_i(nqp::decont(fles), $dcpkg, $name)
);
}
!!
nqp::p6bool(nqp::iseq_i($attr_type, 2))
??
method (Mu:D \fles:) {
nqp::p6box_n(
nqp::getattr_n(nqp::decont(fles), $dcpkg, $name)
);
}
!!
method (Mu:D \fles:) {
nqp::p6box_s(
nqp::getattr_s(nqp::decont(fles), $dcpkg, $name)
);
}
$meth.set_name($meth_name);
}
$package.^add_method($meth_name, $meth);
}
}
# Apply any handles trait we may have.
self.apply_handles($package);
}
method apply_handles(Mu $pkg) {
# None by default.
}
method get_value(Mu $obj) {
nqp::if(
nqp::iseq_i((my int $t = nqp::objprimspec($!type)),0),
nqp::getattr(nqp::decont($obj),$!package,$!name),
nqp::if(
nqp::iseq_i($t,1),
nqp::p6box_i(nqp::getattr_i(nqp::decont($obj),$!package,$!name)),
nqp::if(
nqp::iseq_i($t,2),
nqp::p6box_n(nqp::getattr_n(nqp::decont($obj),
$!package,$!name)),
nqp::if(
nqp::iseq_i($t,3),
nqp::p6box_s(nqp::getattr_s(nqp::decont($obj),
$!package,$!name))
)
)
)
)
}
method set_value(Mu $obj, Mu \value) {
nqp::if(
nqp::iseq_i((my int $t = nqp::objprimspec($!type)),0),
nqp::bindattr(nqp::decont($obj),$!package,$!name,value),
nqp::if(
nqp::iseq_i($t,1),
nqp::p6box_i(nqp::bindattr_i(nqp::decont($obj),
$!package,$!name,value)),
nqp::if(
nqp::iseq_i($t,2),
nqp::p6box_n(nqp::bindattr_n(nqp::decont($obj),
$!package,$!name,value)),
nqp::if(
nqp::iseq_i($t,3),
nqp::p6box_s(nqp::bindattr_s(nqp::decont($obj),
$!package,$!name,value))
)
)
)
)
}
method container() is raw { nqp::ifnull($!auto_viv_container,Nil) }
method readonly() { !self.rw }
method package() { $!package }
method inlined() { $!inlined }
multi method Str(Attribute:D:) { self.name }
multi method gist(Attribute:D:) { self.type.^name ~ " " ~ self.name }
method WHY() {
if nqp::isnull($!why) {
nextsame
} else {
$!why.set_docee(self);
$!why
}
}
method set_why($why) {
$!why := $why;
}
}
# vim: ft=perl6 expandtab sw=4