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Actions.pm
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Actions.pm
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package Niecza::Actions;
use 5.010;
use strict;
use warnings;
use Op;
use RxOp;
use Body;
use Unit;
use Sig;
use Try::Tiny;
our $AUTOLOAD;
my %carped;
sub AUTOLOAD {
my ($cl, $M) = @_;
if ($AUTOLOAD =~ /^Niecza::Actions::(.*)__S_\d\d\d(.*)$/) {
my ($cat, $spec) = ($1, $2);
my $m = "${cat}__S_$spec";
my $a = "${cat}__S_ANY";
if ($cl->can($m) || !$cl->can($a)) {
return $cl->$m($M);
} else {
return $cl->$a($M, $spec);
}
}
$M->sorry("Action method $AUTOLOAD not yet implemented") unless $carped{$AUTOLOAD}++;
}
sub ws { }
sub vws { }
sub unv { }
sub begid { }
sub comment { }
sub comment__S_Sharp { }
sub spacey { }
sub unspacey { }
sub nofun { }
sub curlycheck { }
sub pod_comment { }
sub infixstopper { }
sub decint { my ($cl, $M) = @_;
$M->{_ast} = eval $M->Str; # XXX use a real string parser
}
sub integer { my ($cl, $M) = @_;
$M->{_ast} =
($M->{decint} // $M->{octint} // $M->{hexint} // $M->{binint})->{_ast};
}
sub number { my ($cl, $M) = @_;
my $child = $M->{integer} // $M->{dec_number} // $M->{rad_number};
$M->{_ast} = $child ? $child->{_ast} :
($M->Str eq 'NaN') ? (1e99999/1e99999) : (1e99999);
}
# Value :: Op
sub value { }
sub value__S_number { my ($cl, $M) = @_;
# TODO: Implement the rest of the numeric hierarchy once MMD exists
$M->{_ast} = Op::Num->new(value => $M->{number}{_ast});
}
sub value__S_quote { my ($cl, $M) = @_;
$M->{_ast} = $M->{quote}{_ast};
}
sub ident { my ($cl, $M) = @_;
$M->{_ast} = $M->Str;
}
sub identifier { my ($cl, $M) = @_;
$M->{_ast} = $M->Str;
}
# Either String Op
sub morename { my ($cl, $M) = @_;
$M->{_ast} = $M->{identifier} ? $M->{identifier}{_ast} : $M->{EXPR}{_ast};
}
# { dc: Bool, names: [Either String Op] }
sub name { my ($cl, $M) = @_;
my @names = map { $_->{_ast} } @{ $M->{morename} };
unshift @names, $M->{identifier}{_ast} if $M->{identifier};
$M->{_ast} = { dc => !($M->{identifier}), names => \@names };
}
sub longname {} # look at the children yourself
sub deflongname {}
sub mangle_longname { my ($cl, $M) = @_;
if ($M->{name}{_ast}{dc} || @{ $M->{name}{_ast}{names} } > 1) {
$M->sorry("Multipart names not yet supported");
return "";
}
my ($n) = @{ $M->{name}{_ast}{names} };
for my $cp (@{ $M->{colonpair} }) {
my $k = $cp->{k};
if (ref $cp->{v}) {
$n .= ":" . $cp->{k};
$n .= $cp->{v}{qpvalue} // do {
$M->sorry("Invalid colonpair used as name extension");
"";
}
} else {
# STD seems to think term:name is term:sym<name>. Needs speccy
# clarification.
$M->sorry("Boolean colonpairs as name extensions NYI");
}
}
$n;
}
sub desigilname { my ($cl, $M) = @_;
if ($M->{variable}) {
$M->sorry("Truncated contextualizer syntax NYI");
return;
}
$M->{_ast} = $cl->mangle_longname($M->{longname});
}
sub stopper { }
# quote :: Op
sub quote {}
sub quote__S_Double_Double { my ($cl, $M) = @_;
$M->{_ast} = $M->{nibble}{_ast};
}
sub quote__S_Single_Single { my ($cl, $M) = @_;
$M->{_ast} = $M->{nibble}{_ast};
}
sub quote__S_qq { my ($cl, $M) = @_;
$M->{_ast} = $M->{quibble}{_ast};
}
sub quote__S_q { my ($cl, $M) = @_;
$M->{_ast} = $M->{quibble}{_ast};
}
sub quote__S_Q { my ($cl, $M) = @_;
$M->{_ast} = $M->{quibble}{nibble}{_ast};
}
sub quote__S_Slash_Slash { my ($cl, $M) = @_;
$M->{_ast} = $M->{nibble}{_ast};
}
# :: RxOp
sub atom { my ($cl, $M) = @_;
if ($M->{metachar}) {
$M->{_ast} = $M->{metachar}{_ast};
} else {
$M->{_ast} = RxOp::String->new(text => $M->Str);
}
}
sub quantified_atom { my ($cl, $M) = @_; # :: RxOp
my $atom = $M->{atom}{_ast};
my $ns = $M->{normspace}[0];
my $q = $M->{quantifier}[0] ? $M->{quantifier}[0]{_ast} : undef;
if (!$q) {
$M->{_ast} = $atom;
} elsif ($q->{simple}) {
$M->{_ast} = RxOp::Quantifier->new(type => $q->{simple},
zyg => [$atom]);
} else {
$M->sorry("Unhandled quantifier " . $M->{quantifier}[0]->Str);
}
}
# :: Context hash interpreted by quantified_atom
sub quantifier {}
sub quantifier__S_Star { my ($cl, $M) = @_;
$M->{_ast} = { simple => '*' };
}
sub quantifier__S_Plus { my ($cl, $M) = @_;
$M->{_ast} = { simple => '+' };
}
sub quantifier__S_Question { my ($cl, $M) = @_;
$M->{_ast} = { simple => '?' };
}
sub quantmod { my ($cl, $M) = @_;
if ($M->Str ne '') {
$M->sorry('Quantmods NYI');
return;
}
}
sub quant_atom_list { my ($cl, $M) = @_;
$M->{_ast} = RxOp::Sequence->new(zyg =>
[ map { $_->{_ast} } @{ $M->{quantified_atom} } ]);
}
sub nibbler { my ($cl, $M) = @_;
if ($M->isa('STD::Regex')) {
my $slot = $cl->gensym;
$M->{_ast} = Op::Regex->new(name => $cl->gensym, rxop => $M->{EXPR}{_ast});
} elsif ($M->isa('Niecza::Grammar::CgOp')) {
# XXX We don't interpret the code, so we can't tell if it's actually
# using variables, but still, it probably is.
for my $k (keys %$::CURLEX) {
$::CURLEX->{$k}{used} = 1 if $k =~ /^[\@\%\&\$]\w/;
}
$M->{_ast} = Op::CgOp->new(op => $M->{cgexp}{_ast});
} else {
# garden variety nibbler
my $str = "";
for my $n (@{ $M->{nibbles} }) {
if ($n->isa('Str')) {
$str .= $n->{TEXT};
} else {
$M->sorry("Non-literal contents of strings NYI");
}
}
$M->{_ast} = Op::StringLiteral->new(text => $str);
}
}
sub circumfix { }
sub circumfix__S_Lt_Gt { my ($cl, $M) = @_;
my $sl = $M->{nibble}{_ast};
if (!$sl->isa('Op::StringLiteral') || ($sl->text =~ /\S\s\S/)) {
$M->sorry("Word splitting NYI");
return;
}
my ($t) = $sl->text =~ /^\s*(.*?)\s*$/;
$M->{_ast} = Op::StringLiteral->new(text => $t);
$M->{qpvalue} = '<' . $t . '>';
}
sub circumfix__S_LtLt_GtGt { goto &circumfix__S_Lt_Gt }
sub circumfix__S_Paren_Thesis { my ($cl, $M) = @_;
$M->{_ast} = Op::StatementList->new(children =>
[ map { $_ ? ($_->paren) : () } @{ $M->{semilist}{_ast} } ]);
}
sub circumfix__S_Cur_Ly { my ($cl, $M) = @_;
$M->{_ast} = $cl->block_to_immediate('bare', $M->{pblock}{_ast});
}
sub infixish { my ($cl, $M) = @_;
$M->sorry("Metaoperators NYI") if $M->{infix_postfix_meta_operator}[0];
$M->sorry("Adverbs NYI") if $M->{colonpair};
}
sub INFIX { my ($cl, $M) = @_;
my ($l,$s,$r) = ($M->{left}{_ast}, $M->{infix}{sym}, $M->{right}{_ast});
if ($s eq ':=') { #XXX macro
$M->{_ast} = Op::Bind->new(lhs => $l, rhs => $r, readonly => 0);
return;
}
if ($s eq ',') {
#XXX STD bug causes , in setting to be parsed as left assoc
my @r;
push @r, ($l->isa('Op::CallSub') && $l->splittable_parcel) ?
@{ $l->positionals } : ($l);
push @r, ($r->isa('Op::CallSub') && $r->splittable_parcel) ?
@{ $r->positionals } : ($r);
$M->{_ast} = Op::CallSub->new(
invocant => Op::Lexical->new(name => '&infix:<,>'),
positionals => \@r, splittable_parcel => 1);
return;
}
$M->{_ast} = Op::CallSub->new(
invocant => Op::Lexical->new(name => "&infix:<$s>"),
positionals => [ $l, $r ]);
if ($s eq '=' && $l->isa('Op::Lexical') && $l->state_decl) {
# Assignments (and assign metaops, but we don't do that yet) to has
# and state declarators are rewritten into an appropriate phaser
my $cv = $cl->gensym;
$cl->add_decl(Decl::StateVar->new(backing => $cl->gensym, slot => $cv));
$M->{_ast} = Op::StatementList->new(children => [
Op::Start->new(condvar => $cv, body => $M->{_ast}),
Op::Lexical->new(name => $l->name)]);
}
}
sub CHAIN { my ($cl, $M) = @_;
if (@{ $M->{chain} } != 3) {
$M->sorry('Chaining not yet implemented');
return;
}
$M->{_ast} = Op::CallSub->new(
invocant => Op::Lexical->new(name => '&infix:<' . $M->{chain}[1]{sym} . '>'),
positionals => [ $M->{chain}[0]{_ast}, $M->{chain}[2]{_ast} ]);
}
my %loose2tight = (
'&&' => '&&', '||' => '||', '//' => '//', 'andthen' => 'andthen',
'orelse' => '//', 'and' => '&&', 'or' => '||',
);
sub LIST { my ($cl, $M) = @_;
# STD guarantees that all elements of delims have the same sym
# the last item may have an ast of undef due to nulltermish
my $op = $M->{delims}[0]{sym};
my @pos = grep { defined } map { $_->{_ast} } @{ $M->{list} };
if ($loose2tight{$op}) {
$M->{_ast} = Op::ShortCircuit->new(kind => $loose2tight{$op},
args => \@pos);
} else {
$M->{_ast} = Op::CallSub->new(
invocant => Op::Lexical->new(name => "&infix:<$op>"),
positionals => \@pos,
splittable_parcel => ($op eq ','));
}
}
sub POSTFIX { my ($cl, $M) = @_;
my $op = $M->{_ast};
if ($op->{postfix}) {
$M->{_ast} = Op::CallSub->new(
invocant => Op::Lexical->new(name => "&postfix:<" . $op->{postfix} . ">"),
positionals => [ $M->{arg}{_ast} ]);
} elsif ($op->{name} && $op->{name} =~ /^(?:HOW|WHAT)$/) {
if ($op->{args}) {
$M->sorry("Interrogative operator " . $op->{name} .
" does not take arguments");
return;
}
$M->{_ast} = Op::Interrogative->new(
receiver => $M->{arg}{_ast},
name => $op->{name});
} elsif ($op->{metamethod}) {
$M->{_ast} = Op::CallMetaMethod->new(
receiver => $M->{arg}{_ast},
name => $op->{metamethod},
positionals => $op->{args} // []);
} elsif ($op->{name}) {
$M->{_ast} = Op::CallMethod->new(
receiver => $M->{arg}{_ast},
name => $op->{name},
positionals => $op->{args} // []);
} elsif ($op->{postcall}) {
if (@{ $op->{postcall} } > 1) {
$M->sorry("Slicels NYI");
return;
}
$M->{_ast} = Op::CallSub->new(
invocant => $M->{arg}{_ast},
positionals => ($op->{postcall}[0] // []));
} else {
$M->sorry("Unhandled postop type");
}
}
sub PREFIX { my ($cl, $M) = @_;
$M->{_ast} = Op::CallSub->new(
invocant => Op::Lexical->new(name => '&prefix:<' . $M->{sym} . '>'),
positionals => [ $M->{arg}{_ast} ]);
}
# infix et al just parse the operator itself
sub infix { }
sub infix__S_ANY { }
sub prefix { }
sub prefix__S_ANY { }
sub postfix { }
sub postfix__S_ANY { }
sub postcircumfix { }
sub postcircumfix__S_Paren_Thesis { my ($cl, $M) = @_;
$M->{_ast} = { postcall => $M->{semiarglist}{_ast} };
}
sub postop { my ($cl, $M) = @_;
$M->{_ast} = $M->{postcircumfix} ? $M->{postcircumfix}{_ast} :
{ postfix => $M->{sym} };
}
sub POST { my ($cl, $M) = @_;
$M->{_ast} = $M->{dotty}{_ast} if $M->{dotty};
$M->{_ast} = $M->{privop}{_ast} if $M->{privop};
$M->{_ast} = $M->{postop}{_ast} if $M->{postop};
}
sub PRE { }
sub methodop { my ($cl, $M) = @_;
my %r;
$r{name} = $cl->mangle_longname($M->{longname}) if $M->{longname};
$r{quote} = $M->{quote}{_ast} if $M->{quote};
$r{ref} = $M->{variable}{_ast}{term} if $M->{variable};
$r{args} = $M->{args}[0]{_ast}[0] if $M->{args}[0];
$r{args} = $M->{arglist}[0]{_ast} if $M->{arglist}[0];
$M->{_ast} = \%r;
}
sub dottyop { my ($cl, $M) = @_;
if ($M->{colonpair}) {
$M->sorry("Colonpair dotties NYI");
return;
}
$M->{_ast} = $M->{methodop}{_ast} if $M->{methodop};
$M->{_ast} = { postfix => $M->{postop}{_ast} } if $M->{postop};
}
sub privop { my ($cl, $M) = @_;
$M->{_ast} = { %{ $M->{methodop}{_ast} }, private => 1 };
}
sub dotty { }
sub dotty__S_Dot { my ($cl, $M) = @_;
$M->{_ast} = $M->{dottyop}{_ast};
}
sub dotty__S_DotStar { my ($cl, $M) = @_;
if ($M->{sym} eq '.^' && $M->{dottyop}{_ast}{name}) {
$M->{_ast} = { metamethod => $M->{dottyop}{_ast}{name},
args => $M->{dottyop}{_ast}{args} };
} else {
$M->sorry('NYI dottyop form ' . $M->{sym});
}
}
sub coloncircumfix { my ($cl, $M) = @_;
$M->{_ast} = $M->{circumfix}{_ast};
$M->{qpvalue} = $M->{circumfix}{qpvalue};
}
sub colonpair { }
# term :: Op
sub term { }
sub term__S_value { my ($cl, $M) = @_;
$M->{_ast} = $M->{value}{_ast};
}
sub term__S_identifier { my ($cl, $M) = @_;
my $id = $M->{identifier}{_ast};
my $sal = $M->{args}{_ast} // []; # TODO: support zero-D slicels
if (@$sal > 1) {
$M->sorry("Slicel lists are NYI");
return;
}
if ($M->is_name($M->{identifier}->Str)) {
$M->{_ast} = Op::Lexical->new(name => $id);
return;
}
my $args = $sal->[0] // [];
$M->{_ast} = Op::CallSub->new(
invocant => Op::Lexical->new(name => '&' . $id),
positionals => $args);
}
sub term__S_self { my ($cl, $M) = @_;
$M->{_ast} = Op::Lexical->new(name => 'self');
}
sub term__S_circumfix { my ($cl, $M) = @_;
$M->{_ast} = $M->{circumfix}{_ast};
}
sub term__S_scope_declarator { my ($cl, $M) = @_;
$M->{_ast} = $M->{scope_declarator}{_ast};
}
sub term__S_multi_declarator { my ($cl, $M) = @_;
$M->{_ast} = $M->{multi_declarator}{_ast};
}
sub term__S_package_declarator { my ($cl, $M) = @_;
$M->{_ast} = $M->{package_declarator}{_ast};
}
sub term__S_routine_declarator { my ($cl, $M) = @_;
$M->{_ast} = $M->{routine_declarator}{_ast};
}
sub term__S_regex_declarator { my ($cl, $M) = @_;
$M->{_ast} = $M->{regex_declarator}{_ast};
}
sub term__S_type_declarator { my ($cl, $M) = @_;
$M->{_ast} = $M->{type_declarator}{_ast};
}
sub term__S_dotty { my ($cl, $M) = @_;
$M->{_ast} = $M->{dotty}{_ast};
}
sub term__S_capterm { my ($cl, $M) = @_;
$M->{_ast} = $M->{capterm}{_ast};
}
sub term__S_sigterm { my ($cl, $M) = @_;
$M->{_ast} = $M->{sigterm}{_ast};
}
sub term__S_statement_prefix { my ($cl, $M) = @_;
$M->{_ast} = $M->{statement_prefix}{_ast};
}
sub term__S_variable { my ($cl, $M) = @_;
$M->{_ast} = $M->{variable}{_ast}{term};
}
sub term__S_DotDotDot { my ($cl, $M) = @_;
$M->{_ast} = Op::Yada->new(kind => '...');
}
sub term__S_BangBangBang { my ($cl, $M) = @_;
$M->{_ast} = Op::Yada->new(kind => '!!!');
}
sub term__S_QuestionQuestionQuestion { my ($cl, $M) = @_;
$M->{_ast} = Op::Yada->new(kind => '???');
}
sub variable { my ($cl, $M) = @_;
my $sigil = $M->{sigil} ? $M->{sigil}->Str : substr($M->Str, 0, 1);
my $twigil = $M->{twigil}[0] ? $M->{twigil}[0]{sym} : '';
if (!$M->{desigilname}) {
$M->sorry("Non-simple variables NYI");
return;
}
my $sl = $sigil . $twigil . $M->{desigilname}{_ast};
given ($twigil) {
when ('!') {
$M->{_ast} = {
term => Op::GetSlot->new(name => $M->{desigilname}{_ast},
object => Op::Lexical->new(name => 'self')),
};
}
when ('') {
$M->{_ast} = {
term => Op::Lexical->new(name => $sl),
decl_slot => $sl,
};
}
default {
$M->sorry("Unhandled twigil $twigil");
}
}
}
sub param_sep {}
# :: Sig::Target
sub param_var { my ($cl, $M) = @_;
if ($M->{signature}) {
$M->sorry('Sub-signatures NYI');
return;
}
my $twigil = $M->{twigil}[0] ? $M->{twigil}[0]->Str : '';
my $sigil = $M->{sigil}->Str;
if ($twigil || ($sigil ne '$' && $sigil ne '@')) {
$M->sorry('Non bare scalar targets NYI');
return;
}
$M->{_ast} = Sig::Target->new(list => ($sigil eq '@'), slot =>
$M->{name}[0] ? ($sigil . $M->{name}[0]->Str) : undef);
}
# :: Sig::Parameter
sub parameter { my ($cl, $M) = @_;
if (@{ $M->{type_constraint} } > 0) {
$M->sorry('Parameter type constraints NYI');
return;
}
if (@{ $M->{trait} } > 0) {
$M->sorry('Parameter traits NYI');
return;
}
if (@{ $M->{post_constraint} } > 0) {
$M->sorry('Parameter post constraints NYI');
return;
}
if ($M->{default_value}[0]) {
$M->sorry('Default values NYI');
return;
}
if ($M->{named_param}) {
$M->sorry('Named parameters NYI');
return;
}
if ($M->{quant} ne '*' && ($M->{quant} ne '' || $M->{kind} ne '!')) {
$M->sorry('Exotic parameters NYI');
return;
}
$M->{_ast} = Sig::Parameter->new(target => $M->{param_var}{_ast},
slurpy => ($M->{quant} eq '*'));
}
# signatures exist in several syntactic contexts so just make an object for now
sub signature { my ($cl, $M) = @_;
if ($M->{type_constraint}[0]) {
$M->sorry("Return type constraints NYI");
return;
}
if ($M->{param_var}) {
$M->sorry('\| signatures NYI');
return;
}
for (@{ $M->{param_sep} }) {
if ($_->Str !~ /,/) {
$M->sorry('Parameter separator ' . $_->Str . ' NYI');
return;
}
}
$M->{_ast} = Sig->new(params =>
[map { $_->{_ast} } @{ $M->{parameter} }]);
}
sub multisig { my ($cl, $M) = @_;
if (@{ $M->{signature} } != 1) {
$M->sorry("Multiple signatures NYI");
return;
}
$M->{_ast} = $M->{signature}[0]{_ast};
}
sub cgopname { my ($cl, $M) = @_;
$M->{_ast} = $M->Str;
}
sub cgexp { }
sub cgexp__S_name { my ($cl, $M) = @_;
$M->{_ast} = $M->{cgopname}{_ast};
}
sub cgexp__S_decint { my ($cl, $M) = @_;
$M->{_ast} = $M->{decint}{_ast};
}
sub cgexp__S_quote { my ($cl, $M) = @_;
if (!$M->{quote}{_ast}->isa('Op::StringLiteral')) {
$M->sorry("Strings used in CgOp code must be compile time constants");
}
$M->{_ast} = $M->{quote}{_ast}->text;
}
my %opshortcut = (
'@', [ 'fetch' ],
'l', [ 'scopedlex' ],
'w', [ 'wrap' ],
'ns', [ 'newscalar' ],
'nsw', [ 'newrwscalar' ],
'==', [ 'compare', '==' ], '!=', [ 'compare', '!=' ],
'>=', [ 'compare', '>=' ], '<=', [ 'compare', '<=' ],
'<', [ 'compare', '<' ], '>', [ 'compare', '>' ],
'+', [ 'arith', '+' ], '-', [ 'arith', '-' ],
'*', [ 'arith', '*' ], '/', [ 'arith', '/' ],
);
sub cgexp__S_op { my ($cl, $M) = @_;
no strict 'refs';
my $l = $M->{cgopname}{_ast};
my ($op, @p) = @{ $opshortcut{$l} // [ $l ] };
$M->{_ast} = &{"CgOp::$op"}(@p, map { $_->{_ast} } @{ $M->{cgexp} });
}
sub apostrophe {}
sub quibble {}
sub tribble {}
sub babble {}
sub quotepair {}
sub add_decl {
my ($cl, @decls) = @_;
push @{ $::CURLEX->{'!decls'} //= [] }, @decls;
}
# We can't do much at blockoid reduce time because the context is unknown.
# Roles and subs need somewhat different code gen
sub blockoid { my ($cl, $M) = @_;
# XXX horrible cheat, but my data structures aren't up to the task of
# $::UNIT being a class body &c.
if ($M->Str eq '{YOU_ARE_HERE}') {
$cl->add_decl(Decl::RunMainline->new);
$M->{_ast} = Op::CallSub->new(
invocant => Op::Lexical->new(name => '!mainline'));
} else {
$M->{_ast} = $M->{statementlist}{_ast};
}
}
sub sigil {}
sub sigil__S_Amp {}
sub sigil__S_Dollar {}
sub sigil__S_At {}
sub sigil__S_Percent {}
sub twigil {}
sub twigil__S_Equal {}
sub twigil__S_Bang {}
sub twigil__S_Dot {}
sub twigil__S_Tilde {}
sub twigil__S_Star {}
sub twigil__S_Question {}
sub twigil__S_Caret {}
sub twigil__S_Colon {}
sub terminator {}
sub terminator__S_Thesis {}
sub terminator__S_Semi {}
sub terminator__S_Ket {}
sub terminator__S_Ly {}
sub terminator__S_then {}
sub terminator__S_again {}
sub terminator__S_repeat {}
sub terminator__S_while {}
sub terminator__S_else {}
sub stdstopper {}
sub unitstopper {}
sub eat_terminator {}
sub scoped { my ($cl, $M) = @_;
$M->{_ast} = ($M->{declarator} // $M->{regex_declarator} //
$M->{package_declarator} // $M->{multi_declarator})->{_ast};
}
# :: Op (but adds decls)
sub declarator { my ($cl, $M) = @_;
if ($M->{signature}) {
$M->sorry("Signature declarations NYI");
return;
}
$M->{_ast} = $M->{variable_declarator} ? $M->{variable_declarator}{_ast} :
$M->{routine_declarator} ? $M->{routine_declarator}{_ast} :
$M->{regex_declarator} ? $M->{regex_declarator}{_ast} :
$M->{type_declarator}{_ast};
}
sub scope_declarator { my ($cl, $M) = @_;
$M->{_ast} = $M->{scoped}{_ast};
}
sub scope_declarator__S_my {}
sub scope_declarator__S_our {}
sub scope_declarator__S_augment {}
sub scope_declarator__S_supercede {}
sub scope_declarator__S_has {}
sub scope_declarator__S_state {}
sub scope_declarator__S_anon {}
sub variable_declarator { my ($cl, $M) = @_;
if ($M->{trait}[0] || $M->{post_constraint}[0] || $M->{shape}[0]) {
$M->sorry("Traits, postconstraints, and shapes on variable declarators NYI");
return;
}
my $name = $M->{variable}{_ast}{decl_slot};
my $slot = $name;
if (!$slot) {
$M->sorry("Cannot apply a declarator to a non-simple variable");
return;
}
my $scope = $::SCOPE // 'my';
if ($scope eq 'augment' || $scope eq 'supercede') {
$M->sorry("Illogical scope $scope for simple variable");
return;
}
if ($scope eq 'has' || $scope eq 'our') {
$M->sorry("Unsupported scope $scope for simple variable");
return;
}
if ($scope eq 'anon') {
$slot = $cl->gensym;
}
if ($scope eq 'state') {
$cl->add_decl(Decl::StateVar->new(backing => $cl->gensym,
slot => $slot, list => scalar ($M->{variable}->Str =~ /^\@/)));
$M->{_ast} = Op::Lexical->new(name => $slot, state_decl => 1);
} else {
$M->{_ast} = Op::Lexical->new(name => $slot, declaring => 1,
list => scalar ($M->{variable}->Str =~ /^\@/));
}
}
sub type_declarator {}
sub type_declarator__S_constant { my ($cl, $M) = @_;
my $scope = $::SCOPE // 'my';
if (!$M->{identifier} && !$M->{variable}) {
$M->sorry("Anonymous constants NYI"); #wtf?
return;
}
my $slot = ($M->{identifier} // $M->{variable})->Str;
# This is a cheat. Constants should be, well, constant, and we should be
# using the phaser rewrite mechanism to get the initializer here. XXX
# terms need to use a context hash.
$M->{_ast} = Op::Lexical->new(name => $slot, declaring => 1);
}
sub package_declarator {}
sub package_declarator__S_class { my ($cl, $M) = @_;
$M->{_ast} = $M->{package_def}{_ast};
}
sub package_declarator__S_grammar { my ($cl, $M) = @_;
$M->{_ast} = $M->{package_def}{_ast};
}
sub package_declarator__S_package { my ($cl, $M) = @_;
$M->{_ast} = $M->{package_def}{_ast};
}
sub package_declarator__S_module { my ($cl, $M) = @_;
$M->{_ast} = $M->{package_def}{_ast};
}
sub package_declarator__S_knowhow { my ($cl, $M) = @_;
$M->{_ast} = $M->{package_def}{_ast};
}
sub package_declarator__S_role { my ($cl, $M) = @_;
$M->{_ast} = $M->{package_def}{_ast};
}
sub package_declarator__S_slang { my ($cl, $M) = @_;
$M->{_ast} = $M->{package_def}{_ast};
}
sub package_declarator__S_also { my ($cl, $M) = @_;
$cl->add_decl(map { $_->{_ast} } @{ $M->{trait} });
}
sub termish {}
sub nulltermish { my ($cl, $M) = @_; # for 1,2,3,
# XXX this is insane
$M->{term}{_ast} = $M->{term}{term}{_ast} if $M->{term};
}
sub EXPR {}
sub arglist { my ($cl, $M) = @_;
$M->sorry("Invocant handling is NYI") if $::INVOCANT_IS;
my $x = $M->{EXPR}{_ast};
if (!defined $x) {
$M->{_ast} = [];
} elsif ($x && $x->isa('Op::CallSub') && $x->splittable_parcel) {
$M->{_ast} = $x->positionals;
} else {
$M->{_ast} = [$x];
}
}
sub semiarglist { my ($cl, $M) = @_;
$M->{_ast} = [ map { $_->{_ast} } @{ $M->{arglist} } ];
}
sub args { my ($cl, $M) = @_;
if ($M->{moreargs} || $M->{semiarglist} && $M->{arglist}[0]) {
$M->sorry("Interaction between semiargs and args is not understood");
return;
}
$M->{_ast} = $M->{semiarglist} ? $M->{semiarglist}{_ast} :
$M->{arglist}[0] ? [ $M->{arglist}[0]{_ast} ] : undef;
}
sub statement { my ($cl, $M) = @_;
if ($M->{label} || $M->{statement_mod_cond}[0] || $M->{statement_mod_loop}[0]) {
$M->sorry("Control is NYI");
return;
}
$M->{_ast} = $M->{statement_control} ? $M->{statement_control}{_ast} :
$M->{EXPR} ? $M->{EXPR}{_ast} : undef;
}
sub statementlist { my ($cl, $M) = @_;
$M->{_ast} = Op::StatementList->new(children =>
[ grep { defined $_ } map { $_->{_ast} } @{ $M->{statement} } ]);
}
sub semilist { my ($cl, $M) = @_;
$M->{_ast} = [ map { $_->{_ast} } @{ $M->{statement} } ];
}
sub statement_control { }
sub statement_control__S_if { my ($cl, $M) = @_;
my $else = $M->{else}[0] ?
$cl->block_to_immediate('cond', $M->{else}[0]{_ast}) : undef;
my @elsif;
for (reverse @{ $M->{elsif} }) {
$else = Op::Conditional->new(check => $_->{_ast}[0],
true => $cl->block_to_immediate('cond', $_->{_ast}[1]),
false => $else);
}
$M->{_ast} = Op::Conditional->new(check => $M->{xblock}{_ast}[0],
true => $cl->block_to_immediate('cond', $M->{xblock}{_ast}[1]),
false => $else);
}
sub statement_control__S_while { my ($cl, $M) = @_;
$M->{_ast} = Op::WhileLoop->new(check => $M->{xblock}{_ast}[0],
body => $cl->block_to_immediate('loop',$M->{xblock}{_ast}[1]),
until => 0, once => 0);
}
sub statement_control__S_until { my ($cl, $M) = @_;
$M->{_ast} = Op::WhileLoop->new(check => $M->{xblock}{_ast}[0],
body => $cl->block_to_immediate('loop', $M->{xblock}{_ast}[1]),
until => 1, once => 0);
}
# All package defs have a couple things in common - a special-ish block,
# with a special decl, and some nice runtimey code
sub package_def { my ($cl, $M) = @_;
my $scope = $::SCOPE;
if (!$M->{longname}[0]) {
$scope = 'anon';
}
if ($::SCOPE ne 'anon' && $::SCOPE ne 'my') {
$M->sorry('Non-lexical package definitions are not yet supported');
return;
}
my $name = $M->{longname}[0] ?
$cl->mangle_longname($M->{longname}[0]) : 'ANON';
my $outer = $cl->get_outer($::CURLEX);
my $outervar = $::SCOPE eq 'my' ? $name : $cl->gensym;
my $optype = 'Op::' . ucfirst($::PKGDECL) . 'Def';
my $decltype = 'Decl::' . ucfirst($::PKGDECL);
my $blocktype = $::PKGDECL;
my $bodyvar = $cl->gensym;
unshift @{ $::CURLEX->{'!decls'} //= [] },
map { $_->{_ast} } @{ $M->{trait} };
if (!$M->{decl}{stub}) {
my $stmts = $M->{statementlist} // $M->{blockoid};
my $cbody = $cl->sl_to_block($blocktype, $stmts->{_ast},
name => $name);
my $cdecl = $decltype->new(
name => $name,
var => $outervar,
bodyvar => $bodyvar,
body => $cbody);
$M->{_ast} = $optype->new(decl => $cdecl);
} else {
$M->{_ast} = $optype->new(decl => $decltype->new(
name => $name,
var => $outervar,
stub => 1));
}
}
sub trait_mod {}
sub trait_mod__S_is { my ($cl, $M) = @_;
my $trait = $M->{longname}->Str;
if (!$M->is_name($trait)) {
$M->sorry('Non-superclass is traits NYI');
return;
}
if ($M->{circumfix}[0]) {
$M->sorry('Superclasses cannot have parameters');
return;
}
$M->{_ast} = Decl::Super->new(name => $trait);
}