Created
March 7, 2011 00:31
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knowhow RubyClassHOW { | |
has $!parent; | |
has $!parent_set; | |
has $!name; | |
has %!methods; | |
has %!attributes; | |
method new(:$name) { | |
my $obj := pir::repr_instance_of__PP(self); | |
$obj.BUILD(:name($name)); | |
$obj | |
} | |
method BUILD(:$name) { | |
$!name := $name; | |
$!parent_set := 0; | |
} | |
method new_type(:$name = '<anon>', :$repr = 'P6opaque') { | |
my $metaclass := self.new(:name($name)); | |
pir::repr_type_object_for__PPs($metaclass, $repr); | |
} | |
method add_method($obj, $name, $code_obj) { | |
if %!methods{$name} { | |
pir::die("This class already has a method named " ~ $name); | |
} | |
%!methods{$name} := $code_obj; | |
} | |
method add_attribute($obj, $meta_attr) { | |
my $name := $meta_attr.name; | |
if %!attributes{$name} { | |
pir::die("This class already has an attribute named " ~ $name); | |
} | |
%!attributes{$name} := $meta_attr; | |
} | |
method compose($obj) { | |
if !$!parent_set && $!name ne 'RubyObject' { | |
$!parent := RubyObject; | |
$!parent_set := 1; | |
} | |
# Compose attributes. | |
for self.attributes($obj, :local<0> ) { $_.compose($obj) } | |
$obj; | |
} | |
method methods($obj, :$local!) { | |
my @meths; | |
for %!methods { | |
@meths.push($_.value); | |
} | |
return @meths | |
} | |
method method_table($obj) { | |
return %!methods; | |
} | |
method name() { | |
return $!name | |
} | |
method attributes($obj, :$local!) { | |
my @attrs; | |
for %!attributes { | |
@attrs.push($_.value); | |
} | |
return @attrs | |
} | |
method add_parent($obj, $parent) { | |
if $!parent_set { | |
pir::die("RubyClassHOW does not support multiple inheritance."); | |
} | |
$!parent := $parent; | |
$!parent_set := 1; | |
} | |
method parents($obj, :$local) { | |
my @parents := []; | |
if $!parent_set { | |
if $local { | |
@parents.unshift($!parent); | |
} | |
else { | |
@parents := $!parent.HOW.parents($obj); | |
@parents.unshift($!parent); | |
} | |
} | |
@parents.unshift($obj.WHAT) unless $local; | |
return @parents; | |
} | |
## | |
## Dispatchy | |
## | |
method find_method($obj, $name) { | |
my @mro := $obj.HOW.parents($obj); | |
for @mro { | |
my %meths := $_.HOW.method_table($obj); | |
my $found := %meths{$name}; | |
if pir::defined($found) { | |
return $found; | |
} | |
} | |
pir::null__P() | |
} | |
} | |
#class Cow | |
# def speak | |
# puts "mooo" | |
# end | |
#end | |
# | |
#c = Cow.new | |
#c.speak | |
# ------------ | |
my $t := RubyClassHOW.new_type(:name('RubyObject')); | |
my $h := $t.HOW; | |
my $new := method (*%attrs) { | |
my $i := pir::repr_instance_of__PP(self); | |
for $i.HOW.parents($i) -> $cl { | |
$i.build-magic($cl, |%attrs); | |
} | |
return $i; | |
}; | |
$h.add_method($t, 'new', $new); | |
my $bm := method ($type, *%attrs) { | |
for $type.HOW.attributes($type, :local) { | |
my $name := $_.name; | |
my $key := pir::substr__ssi($name, 2); | |
if pir::exists(%attrs, $key) { | |
pir::setattribute__vPPsP(self, $type, $name, %attrs{$key}); | |
} | |
} | |
return self; | |
}; | |
$h.add_method($t, 'build-magic', $bm); | |
pir::set_hll_global__vSP('RubyObject', $t); | |
$h.compose(t); | |
# ------------- | |
$t := RubyClassHOW.new_type(:name('Cow')); | |
$h := $t.HOW; | |
$h.add_attribute($t, NQPAttribute.new(:name('$!noise'))); | |
my $speak := method ($self:) { say(pir::getattribute__ppps($self, Cow, '$!noise')); } | |
$h.add_method($t, 'speak', $speak); | |
$h.compose($t); | |
pir::set_hll_global__vSP('Cow', $t); | |
# ------------- | |
my $c := Cow.new(:noise("mooooooo")); | |
$c.speak; |
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