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CSharpBackend.pm
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CSharpBackend.pm
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use 5.010;
use strict;
use warnings;
use utf8;
package CSharpBackend;
# Input: A Metamodel::Unit object
# Output: A CodeGenUnit object
# each StaticSub generates <some code> for the sub's body
# we also generate <some code> to build the runtime MOP (really, a thawer using
# CIL; a thaw using a custom format would be faster)
# StaticSub : SubInfo (handled partially in CodeGen itself)
# StaticSub : (opt) static pad, some static fields
# Stash : Dictionary<string,BValue>
# Class : DynMetaObject
# Class : (opt) HOW
# deliberately omitted for now: the run_once optimization & lazy static pad
# generation & indexification
our $unit;
our $nid = 0;
our @decls;
our @thaw;
our @cgs;
our %lpeers;
our %haslet;
our $classhow;
our $libmode;
sub gsym {
my ($type, $desc) = @_;
$desc =~ s/(\W)/"_" . ord($1)/eg;
my $base = 'G' . ($nid++) . $desc;
my $full = $unit->name . "." . $base . ':f,' . $type;
wantarray ? ($full, $base) : $full;
}
my $cl_ty = 'DynMetaObject';
my $si_ty = 'SubInfo';
sub run {
local $unit = shift;
local $libmode = $unit->name ne 'MAIN';
local %lpeers;
local $nid = 0;
local @thaw;
local @decls;
local @cgs;
local $classhow;
# 0s just set up variables
# 1s set up subs
# 2s set up objects
# 3s set up relationships
$unit->visit_local_stashes(\&stash2) unless $libmode; #XXX weird timing
$unit->visit_local_packages(\&pkg0);
$unit->visit_local_subs_preorder(\&sub0);
$unit->visit_local_subs_preorder(\&sub1);
my $mod = '';
$mod .= <<EOH ;
using Niecza;
using System;
using System.Collections.Generic;
public class ${\ $unit->name } {
EOH
$mod .= <<EOM unless $libmode ;
public static void Main() {
Kernel.RunLoop(new SubInfo("boot", BOOT));
}
EOM
unless ($libmode) {
$unit->visit_units_preorder(sub {
$_->visit_local_packages(\&pkg2);
$_->visit_local_subs_preorder(\&sub2);
$_->visit_local_packages(\&pkg3);
$_->visit_local_subs_preorder(\&sub3);
return if $_->bottom_ref;
my $s = $_->setting;
my $m = $_->mainline;
while ($s) {
my $su = $unit->get_unit($s);
push @thaw, CgOp::setindex("*resume_$s",
CgOp::getfield("lex", CgOp::callframe),
CgOp::newscalar(CgOp::rawsget($m->{peer}{ps})));
$s = $su->setting;
$m = $su->mainline;
}
push @thaw, CgOp::sink(CgOp::subcall(CgOp::rawsget($m->{peer}{ps})));
});
push @thaw, CgOp::return;
push @cgs, CodeGen->new(csname => 'BOOT', usednamed => 1,
ops => CgOp::prog(@thaw))->csharp;
}
for (@decls) {
/(?:.*?\.)?(.*):f,(.*)/;
$mod .= " public static $2 $1;\n";
}
$mod .= $_ for (@cgs);
$mod .= "}\n";
$unit->{mod} = $mod;
$unit;
}
sub stash2 {
my $p = $lpeers{$_} = gsym('IP6', join("_", @{ $_->path }));
push @decls, $p;
push @thaw, CgOp::rawsset($p, CgOp::fetch(CgOp::box(
CgOp::rawsget('Kernel.StashP'),
CgOp::rawnew('clr:Dictionary<string,BValue>'))));
if (@{ $_->path } == 1 && $_->path->[0] =~ /^(?:GLOBAL|PROCESS)$/) {
push @thaw, CgOp::rawsset('Kernel.' . ucfirst(lc($_->path->[0])) .
'O', CgOp::rawsget($p));
}
}
# xxx check for SAFE::
my %loopbacks = (
'MCallFrame', 'Kernel.CallFrameMO',
'MGatherIterator', 'RxFrame.GatherIteratorMO',
'MList', 'RxFrame.ListMO',
'MMatch', 'RxFrame.MatchMO',
'PStash', 'Kernel.StashP',
'PAny', 'Kernel.AnyP',
'PArray', 'Kernel.ArrayP',
'PEMPTY', 'RxFrame.EMPTYP',
'PHash', 'Kernel.HashP',
'PStr', 'Kernel.StrP',
);
sub pkg0 {
return unless $_->isa('Metamodel::Class');
my $p = $_->{peer}{mo} = gsym($cl_ty, $_->name);
my $whv = $_->{peer}{what_var} = gsym('Variable', $_->name . '_WHAT');
my $wh6 = $_->{peer}{what_ip6} = gsym('IP6', $_->name . '_WHAT');
push @decls, $p, $whv, $wh6;
}
sub pkg2 {
return unless $_->isa('Metamodel::Class');
my $p = $_->{peer}{mo};
my $whv = $_->{peer}{what_var};
my $wh6 = $_->{peer}{what_ip6};
if ($unit->is_true_setting && ($_->name eq 'Scalar' ||
$_->name eq 'Sub' || $_->name eq 'Stash')) {
push @thaw, CgOp::rawsset($p,
CgOp::rawsget("Kernel." . $_->name . "MO:f,$cl_ty"));
} else {
push @thaw, CgOp::rawsset($p, CgOp::rawnew("clr:$cl_ty",
CgOp::clr_string($_->name)));
for my $a (@{ $_->attributes }) {
push @thaw, CgOp::rawcall(CgOp::rawsget($p), 'AddAttribute',
CgOp::clr_string($a));
}
}
for my $s (@{ $_->superclasses }) {
push @thaw, CgOp::rawcall(CgOp::rawsget($p), 'AddSuperclass',
CgOp::rawsget($unit->deref($s)->{peer}{mo}));
}
push @thaw, CgOp::rawcall(CgOp::rawsget($p), 'Complete');
push @thaw, CgOp::rawsset($wh6, CgOp::rawnew('clr:DynObject', CgOp::rawsget($p)));
push @thaw, CgOp::setfield('slots', CgOp::cast('clr:DynObject', CgOp::rawsget($wh6)), CgOp::null('clr:object[]'));
push @thaw, CgOp::setfield('typeObject', CgOp::rawsget($p), CgOp::rawsget($wh6));
push @thaw, CgOp::rawsset($whv, CgOp::newscalar(CgOp::rawsget($wh6)));
push @thaw, CgOp::rawsset($loopbacks{'P' . $_->name}, CgOp::rawsget($wh6))
if $loopbacks{'P' . $_->name};
push @thaw, CgOp::rawsset($loopbacks{'M' . $_->name}, CgOp::rawsget($p))
if $loopbacks{'M' . $_->name};
$classhow = $wh6 if $_->name eq 'ClassHOW';
}
sub pkg3 {
return unless $_->isa('Metamodel::Class');
my $p = $_->{peer}{mo};
for my $m (@{ $_->methods }) {
push @thaw, CgOp::rawcall(CgOp::rawsget($p),
($m->private ? 'AddPrivateMethod' : 'AddMethod'),
CgOp::clr_string($m->name),
CgOp::rawsget($unit->deref($m->body)->{peer}{ps}));
}
for my $k (sort keys %{ $_->multi_regex_lists }) {
for my $b (@{ $_->multi_regex_lists->{$k} }) {
push @thaw, CgOp::rawcall(CgOp::rawsget($p), 'AddMultiRegex',
CgOp::clr_string($k),
CgOp::rawsget($unit->deref($b)->{peer}{ps}));
}
}
if ($classhow) {
push @thaw, CgOp::setfield('how', CgOp::rawsget($p), CgOp::fetch(
CgOp::box(CgOp::rawsget($classhow), CgOp::rawsget($p))));
}
}
sub enter_code {
my ($body) = @_;
my @code;
for my $ln (sort keys %{ $body->lexicals }) {
my $lx = $body->lexicals->{$ln};
next if $body->run_once && $body->spad_exists && !dynname($ln);
if ($lx->isa('Metamodel::Lexical::SubDef')) {
push @code, access_lex($body, $ln,
CgOp::newscalar(CgOp::rawscall('Kernel.MakeSub',
CgOp::rawsget($lx->body->{peer}{si}),
CgOp::callframe)));
} elsif ($lx->isa('Metamodel::Lexical::Simple')) {
my $frag;
next if $lx->noinit;
if ($lx->hash || $lx->list) {
# XXX should be SAFE::
my $imp = $_->find_lex($lx->hash ? 'Hash' : 'Array')->path;
my $var = $unit->deref($unit->get_stash(@$imp)->obj)
->{peer}{what_var};
$frag = CgOp::methodcall(CgOp::rawsget($var), 'new');
} else {
$frag = CgOp::newblankrwscalar;
}
push @code, access_lex($body, $ln, $frag);
}
}
novars:
if (defined $body->signature) {
push @code, $body->signature->binder($body);
}
@code;
}
sub access_lex {
my ($body, $name, $set_to) = @_;
if ($haslet{$name}) {
return CgOp::letvar($name, $set_to);
}
my $bp = $body;
my $order = 0;
my $lex;
while ($bp) {
$lex = $bp->lexicals->{$name};
if (!$lex) {
$bp = $bp->outer;
$order++;
} elsif ($lex->isa('Metamodel::Lexical::Alias')) {
$name = $lex->to;
} else {
last;
}
}
if (!defined($lex)) {
die "Internal error: failed to resolve lexical $name in " . $body->name;
}
if ($lex->isa('Metamodel::Lexical::SubDef') ||
$lex->isa('Metamodel::Lexical::Simple')) {
if ($bp->run_once && !dynname($name)) {
return $set_to ? CgOp::rawsset($lex->{peer}, $set_to) :
CgOp::rawsget($lex->{peer});
} elsif ((my $ix = $lex->{peer}) >= 0) {
return $set_to ?
CgOp->new(op => [ rtpadputi => $order, $ix ],
zyg => [ $set_to ]) :
CgOp->new(op => [ rtpadgeti => 'Variable', $order, $ix ]);
} else {
return $set_to ?
CgOp->new(op => [ rtpadput => $order, $name ],
zyg => [ $set_to ]) :
CgOp->new(op => [ rtpadget => 'Variable', $order, $name ]);
}
} elsif ($lex->isa('Metamodel::Lexical::Stash')) {
die "cannot rebind stashes" if $set_to;
my $ref = $unit->get_stash(@{ $lex->path })->obj;
my $obj = $ref && $unit->deref($ref);
return $obj->{peer} ? CgOp::rawsget($obj->{peer}{what_var}) :
CgOp::null('var');
} elsif ($lex->isa('Metamodel::Lexical::Common')) {
return $set_to ?
CgOp::bset(CgOp::rawsget($lex->{peer}), $set_to) :
CgOp::bget(CgOp::rawsget($lex->{peer}));
} elsif ($lex->isa('Metamodel::Lexical::SubImport')) {
die "cannot rebind imported subs" if $set_to;
return CgOp::newscalar(CgOp::rawsget($unit->deref($lex->ref)->{peer}{ps}));
} else {
die "unhandled $lex";
}
}
sub resolve_lex {
my ($body, $op) = @_;
my ($opc, $arg, @rest) = @{ $op->op };
if ($opc eq 'scopelex') {
my $nn = access_lex($body, $arg, $op->zyg->[0]);
#XXX
%$op = %$nn;
bless $op, ref($nn);
resolve_lex($body, $_) for @{ $op->zyg };
} elsif ($opc eq 'let') {
local $haslet{$arg} = 1;
resolve_lex($body, $_) for @{ $op->zyg };
} else {
resolve_lex($body, $_) for @{ $op->zyg };
}
}
sub codegen_sub {
my @enter = enter_code($_);
my $ops;
# TODO: Bind a return value here to catch non-ro sub use
if ($_->gather_hack) {
$ops = CgOp::prog(@enter, CgOp::sink($_->code->cgop($_)),
CgOp::rawscall('Kernel.Take', CgOp::scopedlex('EMPTY')));
} elsif ($_->returnable && defined($_->signature)) {
$ops = CgOp::prog(@enter,
CgOp::return(CgOp::span("rstart", "rend",
$_->code->cgop($_))),
CgOp::ehspan(4, undef, 0, "rstart", "rend", "rend"));
} else {
$ops = CgOp::prog(@enter, CgOp::return($_->code->cgop($_)));
}
local %haslet;
resolve_lex($_, $ops);
CodeGen->new(csname => $_->{peer}{cbase}, ops => $ops,
usednamed => $_->{peer}{uname}, minlets => $_->{peer}{nlexn});
}
sub dynname { $_[0] =~ /^.?[*?]/ }
# lumped under a sub are all the static-y lexicals
# protopads and proto-sub-instances need to exist early because methods, in
# particular, bind to them
# note: preorder
sub sub0 {
my $node = ($_->{peer} = {});
push @decls, ($node->{si} = gsym($si_ty, $_->name));
push @decls, ($node->{ps} = gsym('IP6', $_->name . 'PS'))
if !$_->outer || $_->outer->spad_exists;
push @decls, ($node->{pp} = gsym('Frame', $_->name . 'PP'))
if $_->spad_exists;
@$node{'cref','cbase'} = gsym('DynBlockDelegate', $_->name . 'C');
my ($nlexn, $uname) = (0,0);
for my $ln (sort keys %{ $_->lexicals }) {
my $lx = $_->lexicals->{$ln};
if ($lx->isa('Metamodel::Lexical::Common')) {
my $bv = $lx->{peer} = gsym('BValue', $lx->name);
push @decls, $bv;
}
if ($lx->isa('Metamodel::Lexical::SubDef') ||
$lx->isa('Metamodel::Lexical::Simple')) {
if (dynname($ln)) {
$lx->{peer} = -1;
$uname = 1;
} elsif ($_->run_once) {
push @decls, ($lx->{peer} = gsym('Variable', $ln));
} else {
$lx->{peer} = ($nlexn++);
}
}
}
@$node{'nlexn', 'uname'} = ($nlexn, $uname);
}
sub sub1 {
my $node = $_->{peer};
my $si = $node->{si};
my $cg = codegen_sub($_);
$node->{sictor} = [ $cg->subinfo_ctor_args(
($_->outer ? CgOp::rawsget($_->outer->{peer}{si}) :
CgOp::null('clr:SubInfo')),
($_->ltm ? RxOp::lad2cgop($_->ltm) : CgOp::null('clr:LAD'))) ];
push @cgs, $cg->csharp;
}
sub sub2 {
my $node = $_->{peer};
my $si = $node->{si};
push @thaw, CgOp::rawsset($si, CgOp::rawnew("clr:$si_ty", @{ $node->{sictor} }));
if ($_->class ne 'Sub') {
my $cl = $unit->deref($unit->get_stash(@{ $_->find_lex_pkg($_->class) })->obj);
push @thaw, CgOp::setfield('mo', CgOp::rawsget($si), CgOp::rawsget($cl->{peer}{mo}));
}
my $pp = $node->{pp};
if ($pp) {
push @thaw, CgOp::rawsset($pp, CgOp::rawnew('clr:Frame',
CgOp::null('clr:Frame'), (!$_->outer ? CgOp::null('clr:Frame') :
CgOp::rawsget($_->outer->{peer}{pp})),
CgOp::rawsget($si)));
if ($node->{uname}) {
push @thaw, CgOp::setfield('lex', CgOp::rawsget($pp),
CgOp::rawnew('clr:Dictionary<string,object>'));
}
if ($node->{nlexn} > 4) {
push @thaw, CgOp::setfield('lexn', CgOp::rawsget($pp),
CgOp::rawnewzarr('clr:object', CgOp::int($node->{nlexn} - 4)));
}
}
my $ps = $node->{ps};
if ($ps) {
push @thaw, CgOp::rawsset($ps, CgOp::rawscall('Kernel.MakeSub',
CgOp::rawsget($si), !$_->outer ? CgOp::null('clr:Frame') :
CgOp::rawsget($_->outer->{peer}{pp})));
}
}
# use for SubDef / Simple only
sub protolset {
my ($body, $lname, $lex, $frag) = @_;
if ($body->run_once && !dynname($lname)) {
push @thaw, CgOp::rawsset($lex->{peer}, $frag);
} elsif ((my $ix = $lex->{peer}) >= 4) {
push @thaw, CgOp::setindex(CgOp::int($ix - 4),
CgOp::getfield('lexn', CgOp::rawsget($body->{peer}{pp})),
$frag);
} elsif ($ix >= 0) {
push @thaw, CgOp::setfield("lex$ix",
CgOp::rawsget($body->{peer}{pp}), $frag);
} else {
push @thaw, CgOp::setindex($lname,
CgOp::getfield('lex', CgOp::rawsget($body->{peer}{pp})),
$frag);
}
}
sub sub3 {
for my $ln (sort keys %{ $_->lexicals }) {
my $lx = $_->lexicals->{$ln};
my $frag;
if ($lx->isa('Metamodel::Lexical::Common')) {
my $stash = $unit->get_stash(@{ $lx->path });
if (!$lpeers{$stash}) {
Carp::confess("Peer for " . join("::", @{ $stash->path }) . " has gone missing!");
}
push @thaw, CgOp::rawsset($lx->{peer},
CgOp::rawscall('Kernel.PackageLookup',
CgOp::rawsget($lpeers{$stash}),
CgOp::clr_string($lx->name)));
} elsif ($lx->isa('Metamodel::Lexical::SubDef')) {
next unless $_->spad_exists;
protolset($_, $ln, $lx,
CgOp::newscalar(CgOp::rawsget($lx->body->{peer}{ps})));
} elsif ($lx->isa('Metamodel::Lexical::Simple')) {
next unless $_->spad_exists;
if ($lx->hash || $lx->list) {
# XXX should be SAFE::
my $imp = $_->find_lex($lx->hash ? 'Hash' : 'Array')->path;
my $var = $unit->deref($unit->get_stash($$imp)->obj)
->{peer}{what_var};
$frag = CgOp::methodcall(CgOp::rawsget($var), 'new');
} else {
$frag = CgOp::newblankrwscalar;
}
protolset($_, $ln, $lx, $frag);
}
}
}