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Actions.nqp
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Actions.nqp
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use NQPP6QRegex;
use NQPP5QRegex;
use Perl6::Pod;
use Perl6::Ops;
use QRegex;
use QAST;
my $wantwant := Mu;
my int $?BITS := nqp::isgt_i(nqp::add_i(2147483648, 1), 0) ?? 64 !! 32;
sub block_closure($code) {
my $closure := QAST::Op.new(
:op('callmethod'), :name('clone'),
$code
);
$closure := QAST::Op.new( :op('p6capturelex'), $closure);
$closure.annotate('past_block', $code.ann('past_block'));
$closure.annotate('code_object', $code.ann('code_object'));
$closure
}
sub wantall($ast, $by) {
my int $i := 0;
my int $e := $ast ?? +@($ast) !! 0;
while $i < $e { $ast[$i] := wanted($ast[$i], $by ~ ' wa'); $i := $i + 1 }
Nil;
}
sub WANTALL($ast, $by) {
my int $i := 0;
my int $e := $ast ?? +@($ast) !! 0;
while $i < $e { $ast[$i] := WANTED($ast[$i], $by ~ ' WA'); $i := $i + 1 }
Nil;
}
sub unwantall($ast, $by) {
my int $i := 0;
my int $e := $ast ?? +@($ast) !! 0;
while $i < $e { $ast[$i] := unwanted($ast[$i], $by ~ ' ua'); $i := $i + 1 }
Nil;
}
sub UNWANTALL($ast, $by) {
my int $i := 0;
my int $e := $ast ?? +@($ast) !! 0;
while $i < $e { $ast[$i] := UNWANTED($ast[$i], $by ~ ' ua'); $i := $i + 1 }
Nil;
}
# Note that these wanted/unwanted routines can return a different ast
# from the one passed, so always store the result back from where
# got it. (Like how wantall does it above.)
sub wanted($ast,$by) {
# $wantwant := nqp::getenvhash<RAKUDO_WANT> unless nqp::isconcrete($wantwant);
my $byby := $wantwant ?? $by ~ ' u' !! $by;
return $ast unless nqp::can($ast,'ann');
my $addr := nqp::where($ast);
return $ast if $ast.wanted; # already marked from here down
return $ast if $ast.sunk; # already marked from here down
note('wanted ' ~ $addr ~ ' by ' ~ $by ~ "\n" ~ $ast.dump) if $wantwant;
# if $ast.sunk {
# note("Oops, already sunk node is now wanted!?! \n" ~ $ast.dump);
# $ast.sunk(0);
# }
my $e := +@($ast) - 1;
$ast.annotate('BY',$byby) if $wantwant;
if nqp::istype($ast,QAST::Stmt) || nqp::istype($ast,QAST::Stmts) {
my $resultchild := $ast.resultchild // $e;
my int $i := 0;
while $i <= $e {
$ast[$i] := $i == $resultchild ?? wanted($ast[$i], $byby) !! unwanted($ast[$i], $byby);
++$i;
}
$ast.wanted(1);
}
elsif nqp::istype($ast,QAST::Block) {
my int $i := 1;
my $*WANTEDOUTERBLOCK := $ast;
while $i <= $e {
$ast[$i] := WANTED($ast[$i], $byby);
++$i;
}
$ast.wanted(1);
}
elsif nqp::istype($ast,QAST::Op) {
if $ast.op eq 'call' && (
!$ast.name ||
$ast.name eq '&infix:<,>' ||
$ast.name eq '&infix:<andthen>' ||
$ast.name eq '&infix:<orelse>' ||
$ast.name eq '&infix:<notandthen>' ||
$ast.name eq '&infix:<xx>') {
WANTALL($ast,$byby);
}
elsif $ast.op eq 'callmethod' {
WANTALL($ast,$byby);
}
elsif $ast.op eq 'p6capturelex' {
$ast.annotate('past_block', wanted($ast.ann('past_block'), $byby));
$ast.wanted(1);
}
elsif $ast.op eq 'call' ||
$ast.op eq 'callstatic' ||
$ast.op eq 'handle' ||
$ast.op eq 'locallifetime' ||
$ast.op eq 'p6typecheckrv' ||
$ast.op eq 'handlepayload' {
$ast[0] := WANTED($ast[0], $byby) if +@($ast);
$ast.wanted(1);
}
elsif $ast.op eq 'p6decontrv' {
$ast[1] := WANTED($ast[1], $byby) if +@($ast);
$ast.wanted(1);
}
elsif $ast.op eq 'while' ||
$ast.op eq 'until' ||
$ast.op eq 'repeat_while' ||
$ast.op eq 'repeat_until' {
my $repeat := nqp::eqat($ast.op,'repeat',0);
my $while := nqp::index($ast.op,'while',0) >= 0;
# we always have a body
my $cond := WANTED($ast[0],$byby);
my $body := WANTED($ast[1],$byby);
my $block := Perl6::Actions::make_thunk_ref($body, $body.node);
my $past := QAST::Op.new(:op<callmethod>, :name<from-loop>, :node($body.node),
QAST::WVal.new( :value($*W.find_symbol(['Seq']))),
block_closure($block) );
# conditional (if not always true (or if repeat))
if $repeat || !$cond.has_compile_time_value || !$cond.compile_time_value == $while {
$cond := QAST::Op.new( :op<callmethod>, :name<not>, $cond ) unless $while;
$block := Perl6::Actions::make_thunk_ref($cond, nqp::can($cond,'node') ?? $cond.node !! $body.node);
$past.push( block_closure($block) );
}
# 3rd part of loop, if any
if +@($ast) > 2 {
$block := Perl6::Actions::make_thunk_ref($ast[2], $ast[2].node);
$block.annotate('outer',$*WANTEDOUTERBLOCK) if $*WANTEDOUTERBLOCK;
$past.push( UNWANTED(block_closure($block),$byby) )
}
if $repeat {
my $wval := QAST::WVal.new( :value($*W.find_symbol(['True'])) );
$wval.named('repeat');
$past.push($wval);
}
$ast := $past;
$ast.wanted(1);
}
elsif $ast.op eq 'if' ||
$ast.op eq 'unless' ||
$ast.op eq 'with' ||
$ast.op eq 'without' {
$ast[1] := WANTED($ast[1], $byby);
$ast[2] := WANTED($ast[2], $byby) if +@($ast) > 2 && nqp::istype($ast[2],QAST::Node);
$ast.wanted(1);
}
}
elsif nqp::istype($ast,QAST::Want) {
$ast.wanted(1);
my $node := $ast[0];
if nqp::istype($node,QAST::Op) {
if $node.op eq 'call' && (!$node.name || $node.name eq '&infix:<xx>') {
$node := $node[0];
if nqp::istype($node,QAST::Op) && $node.op eq 'p6capturelex' {
$node.annotate('past_block', WANTED($node.ann('past_block'), $byby));
}
}
elsif $node.op eq 'call' {
$ast[0] := WANTED($node,$byby);
}
elsif $node.op eq 'callstatic' || $node.op eq 'hllize' {
$node[0] := WANTED($node[0], $byby);
}
elsif $node.op eq 'p6for' || $node.op eq 'p6forstmt' {
$node := $node[1];
if nqp::istype($node,QAST::Op) && $node.op eq 'p6capturelex' {
$node.annotate('past_block', WANTED($node.ann('past_block'), $byby));
}
}
elsif $node.op eq 'while' ||
$node.op eq 'until' ||
$node.op eq 'repeat_while' ||
$node.op eq 'repeat_until' {
return WANTED($node,$byby) if !$*COMPILING_CORE_SETTING;
$node[1] := WANTED($node[1], $byby);
$node.wanted(1);
}
elsif $node.op eq 'if' ||
$node.op eq 'unless' ||
$node.op eq 'with' ||
$node.op eq 'without' {
$node[1] := WANTED($node[1], $byby);
$node[2] := WANTED($node[2], $byby) if +@($node) > 2 && nqp::istype($node[2],QAST::Node);
$node.wanted(1);
}
}
}
$ast;
}
sub WANTED($ast, $by) {
if nqp::istype($ast, QAST::Node) {
$ast := wanted($ast, $by ~ ' W');
$ast.wanted(1); # force in case it's just a thunk
}
else {
note("Non ast passed to WANTED: " ~ $ast.HOW.name($ast));
}
$ast;
}
my %nosink := nqp::hash('sink',1,'push',1,'append',1,'unshift',1,'prepend',1,'splice',1);
sub unwanted($ast, $by) {
my $byby := $by ~ ' u';
return $ast unless nqp::can($ast,'ann');
my $addr := nqp::where($ast);
return $ast if $ast.sunk;
return $ast if $ast.wanted; # probably a loose thunk just stashed somewhere random
$ast.annotate('BY',$byby) if $wantwant;
my $e := +@($ast) - 1;
note('unwanted ' ~ $addr ~ ' by ' ~ $by ~ "\n" ~ $ast.dump) if $wantwant;
if nqp::istype($ast,QAST::Stmt) || nqp::istype($ast,QAST::Stmts) {
# Unwant all kids, not just last one, so we recurse into blocks and such,
# don't just rely on the optimizer to default to void.
my int $i := 0;
while $i <= $e {
$ast[$i] := unwanted($ast[$i], $byby);
++$i;
}
$ast.sunk(1);
$ast.push(QAST::WVal.new( :value($*W.find_symbol(['True'])) ))
if $e >= 0 && nqp::istype($ast[$e],QAST::Op) && $ast[$e].op eq 'bind';
}
elsif nqp::istype($ast,QAST::Block) {
my int $i := 1;
my $*WANTEDOUTERBLOCK := $ast;
while $i <= $e {
$ast[$i] := UNWANTED($ast[$i], $byby);
++$i;
}
$ast.sunk(1);
}
elsif nqp::istype($ast,QAST::Op) {
if $ast.op eq 'call' {
if $ast.name eq '&infix:<,>' || $ast.name eq '&infix:<xx>' {
UNWANTALL($ast,$byby);
}
elsif $ast.name eq '&term:<now>' {
$ast.node.worry("Useless use of 'now' in sink context");
}
else {
$ast[0] := UNWANTED($ast[0], $byby) if +@($ast);
}
$ast.sunk(1);
}
elsif $ast.op eq 'p6capturelex' {
$ast.annotate('past_block', unwanted($ast.ann('past_block'), $byby));
$ast.sunk(1);
}
elsif $ast.op eq 'callstatic' ||
$ast.op eq 'handle' ||
$ast.op eq 'locallifetime' ||
$ast.op eq 'p6typecheckrv' ||
$ast.op eq 'handlepayload' ||
$ast.op eq 'ifnull' {
$ast[0] := UNWANTED($ast[0], $byby) if +@($ast);
$ast.sunk(1);
}
elsif $ast.op eq 'hllize' {
my $node := $ast[0];
if $node.op eq 'callmethod' && !$ast.nosink {
if !$node.nosink && !$*COMPILING_CORE_SETTING && !%nosink{$node.name} {
$ast.sunk(1);
$ast := QAST::Op.new(:op<callmethod>, :name<sink>, $ast);
$ast.sunk(1);
return $ast;
}
}
$ast.sunk(1);
}
elsif $ast.op eq 'callmethod' {
if !$ast.nosink && !$*COMPILING_CORE_SETTING && !%nosink{$ast.name} {
$ast.sunk(1);
$ast := QAST::Op.new(:op<callmethod>, :name<sink>, $ast);
$ast.sunk(1);
return $ast;
}
$ast[0] := UNWANTED($ast[0], $byby) if +@($ast);
$ast.sunk(1);
}
elsif $ast.op eq 'p6decontrv' {
$ast[1] := UNWANTED($ast[1], $byby) if +@($ast);
$ast.sunk(1);
}
elsif $ast.op eq 'while' ||
$ast.op eq 'until' ||
$ast.op eq 'repeat_while' ||
$ast.op eq 'repeat_until' {
# Do we need to force loop to produce return values for internal reasons?
if !$*COMPILING_CORE_SETTING && $ast[1].ann('WANTMEPLEASE') {
$ast := QAST::Op.new(:op<callmethod>, :name<sink>, WANTED($ast, $byby));
$ast.sunk(1);
return $ast;
}
$ast[1] := UNWANTED($ast[1], $byby);
$ast.sunk(1);
}
elsif $ast.op eq 'if' ||
$ast.op eq 'unless' ||
$ast.op eq 'with' ||
$ast.op eq 'without' {
$ast[1] := UNWANTED($ast[1], $byby);
$ast[2] := UNWANTED($ast[2], $byby) if +@($ast) > 2 && nqp::istype($ast[2],QAST::Node);
$ast.sunk(1);
}
elsif $ast.op eq 'bind' {
$ast.sunk(1);
}
}
elsif nqp::istype($ast,QAST::Want) {
$ast.sunk(1);
my $node := $ast[0];
if nqp::istype($node,QAST::WVal) {
$node.sunk(1);
$ast[2].sunk(1);
}
elsif nqp::istype($node,QAST::Op) {
if $node.op eq 'call' {
$node.sunk(1);
if !$node.name {
my $node0 := $node[0];
unwanted($node0, $byby);
if nqp::istype($node0,QAST::Op) && $node0.op eq 'call' && nqp::eqat($node0.name, '&META', 0) {
my $op := $node.node.Str;
my $t := nqp::index($op,' ');
$op := nqp::substr($op, 0, $t) if $t > 0;
my $purity := 0;
if $node0[0].ann('is_pure') {
$purity := 1;
}
else {
my $subname := $node0[0].name;
my $subfun := try $*W.find_symbol([$subname]);
if $subfun {
if nqp::index($node0.name, 'ASSIGN') < 0 && nqp::can($subfun, 'IS_PURE') && $subfun.IS_PURE {
$purity := 1;
}
}
else {
$purity := 1; # "can't happen" except in setting, so assume will be pure
}
}
$node.node.PRECURSOR.worry("Useless use of $op in sink context") if $purity;
}
}
else {
my $infix := $node.node<infix>;
if $infix {
my $sym := $infix<sym>;
if $sym eq ',' || $sym eq 'xx' { unwantall($node, $byby) }
elsif $sym eq '...' ||
$sym eq '...^' ||
$sym eq '…' ||
$sym eq '…^'
{
$node.annotate('useless', $sym);
$node.node.worry("Useless use of $sym in sink context");
}
}
elsif $node.name eq '&term:<now>' {
$node.annotate('useless', "'now'");
$node.node.worry("Useless use of 'now' in sink context");
}
}
}
elsif $node.op eq 'hllize' {
$ast[0] := UNWANTED($node,$byby);
}
elsif $node.op eq 'callmethod' {
if !$node.nosink && !%nosink{$node.name} {
$ast := QAST::Op.new(:op<callmethod>, :name<sink>, unwanted($node, $byby));
$ast.sunk(1);
return $ast;
}
$node.sunk(1);
}
elsif $node.op eq 'p6for' || $node.op eq 'p6forstmt' {
$node := $node[1];
if nqp::istype($node,QAST::Op) && $node.op eq 'p6capturelex' {
$node.annotate('past_block', UNWANTED($node.ann('past_block'), $byby));
}
}
elsif $node.op eq 'while' || $node.op eq 'until' {
if !$*COMPILING_CORE_SETTING && $node[1].ann('WANTMEPLEASE') {
$ast := QAST::Op.new(:op<callmethod>, :name<sink>, WANTED($node, $byby));
$ast.sunk(1);
return $ast;
}
$node[1] := UNWANTED($node[1], $byby);
$node.sunk(1);
}
elsif $node.op eq 'if' || $node.op eq 'unless' || $node.op eq 'with' || $node.op eq 'without' {
for 1,2 {
if +@($node) > $_ && nqp::istype($node[$_],QAST::Node) {
if nqp::istype($node[$_],QAST::Op) && $node[$_].op eq 'bind' {
$node[$_] := QAST::Stmts.new(
$node[$_],
QAST::WVal.new( :value($*W.find_symbol(['True']))));
}
$node[$_] := UNWANTED($node[$_], $byby);
}
}
$node.sunk(1);
}
elsif $node.op eq 'callmethod' && $node.name eq 'new' {
$node.sunk(1);
}
}
}
$ast;
}
sub UNWANTED($ast, $by) {
if nqp::istype($ast, QAST::Node) {
$ast := unwanted($ast, $by ~ ' U');
$ast.sunk(1);
}
else {
note("Non ast passed to UNWANTED: " ~ $ast.HOW.name($ast));
}
$ast;
}
register_op_desugar('p6callmethodhow', -> $qast {
$qast := $qast.shallow_clone();
my $inv := $qast.shift;
my $tmp := QAST::Node.unique('how_invocant');
$qast.op('callmethod');
$qast.unshift(QAST::Var.new( :name($tmp), :scope('local') ));
$qast.unshift(QAST::Op.new(
:op('how'),
QAST::Var.new( :name($tmp), :scope('local') )
));
QAST::Stmts.new(
QAST::Op.new(
:op('bind'),
QAST::Var.new( :name($tmp), :scope('local'), :decl('var') ),
$inv
),
QAST::Op.new( :op('hllize'), $qast )
)
});
register_op_desugar('p6fatalize', -> $qast {
my $tmp := QAST::Node.unique('fatalizee');
QAST::Stmts.new(
:resultchild(0),
QAST::Op.new(
:op('bind'),
QAST::Var.new( :name($tmp), :scope('local'), :decl('var') ),
$qast[0]
),
QAST::Op.new(
:op('if'),
QAST::Op.new(
:op('istype'),
QAST::Var.new( :name($tmp), :scope('local') ),
$qast[1],
),
QAST::Op.new(
:op('callmethod'), :name('sink'),
QAST::Var.new( :name($tmp), :scope('local') )
)
))
});
register_op_desugar('p6for', -> $qast {
my $cond := $qast[0];
my $block := $qast[1];
my $label := $qast[2];
my $for-list-name := QAST::Node.unique('for-list');
my $iscont := QAST::Op.new(:op('iscont'), QAST::Var.new( :name($for-list-name), :scope('local') ));
$iscont.named('item');
my $call := QAST::Op.new(
:op<callmethod>, :name<map>, :node($qast),
QAST::Var.new( :name($for-list-name), :scope('local') ),
$block,
$iscont,
);
if $label {
$call.push($label);
}
my $bind := QAST::Op.new(
:op('bind'),
QAST::Var.new( :name($for-list-name), :scope('local'), :decl('var') ),
$cond,
);
QAST::Stmts.new(
$bind,
QAST::Op.new( :op<callmethod>, :name($qast.sunk ?? 'sink' !! 'eager'), $call )
);
});
register_op_desugar('p6forstmt', -> $qast {
my $for-target-name := QAST::Node.unique('for_target');
my $for-target := QAST::Op.new(
:op('bind'),
QAST::Var.new( :name($for-target-name), :scope('local'), :decl('var') ),
$qast[0]
);
my $iterator-name := QAST::Node.unique('for_iterator');
my $iterator := QAST::Op.new(
:op('bind'),
QAST::Var.new( :name($iterator-name), :scope('local'), :decl('var') ),
QAST::Op.new(
:op('callmethod'), :name('iterator'),
QAST::Op.new(
:op('if'),
QAST::Op.new(
:op('iscont'),
QAST::Var.new( :name($for-target-name), :scope('local') )
),
QAST::Op.new(
:op('callstatic'), :name('&infix:<,>'),
QAST::Var.new( :name($for-target-name), :scope('local') )
),
QAST::Var.new( :name($for-target-name), :scope('local') )
)));
my $iteration-end-name := QAST::Node.unique('for_iterationend');
my $iteration-end := QAST::Op.new(
:op('bind'),
QAST::Var.new( :name($iteration-end-name), :scope('local'), :decl('var') ),
QAST::WVal.new( :value($qast.ann('IterationEnd')) )
);
my $block-name := QAST::Node.unique('for_block');
my $block := QAST::Op.new(
:op('bind'),
QAST::Var.new( :name($block-name), :scope('local'), :decl('var') ),
$qast[1]
);
my $iter-val-name := QAST::Node.unique('for_iterval');
my $loop := QAST::Op.new(
:op('until'),
QAST::Op.new(
:op('eqaddr'),
QAST::Op.new(
:op('decont'),
QAST::Op.new(
:op('bind'),
QAST::Var.new( :name($iter-val-name), :scope('local'), :decl('var') ),
QAST::Op.new(
:op('callmethod'), :name('pull-one'),
QAST::Var.new( :name($iterator-name), :scope('local') )
)
)
),
QAST::Var.new( :name($iteration-end-name), :scope('local') )
),
QAST::Op.new(
:op('call'),
QAST::Var.new( :name($block-name), :scope('local') ),
QAST::Var.new( :name($iter-val-name), :scope('local') )
));
if $qast[2] {
$loop.push($qast[2]);
}
QAST::Stmts.new(
$for-target,
$iterator,
$iteration-end,
$block,
$loop,
QAST::WVal.new( :value($qast.ann('Nil')) )
)
});
sub can-use-p6forstmt($block) {
my $past_block := $block.ann('past_block');
my $count := $past_block.ann('count');
return 0 unless nqp::isconcrete($count) && $count == 1;
my $code := $block.ann('code_object');
my $block_type := $*W.find_symbol(['Block'], :setting-only);
return 1 unless nqp::istype($code, $block_type);
my $p := nqp::getattr($code, $block_type, '$!phasers');
nqp::isnull($p) ||
!(nqp::existskey($p, 'FIRST') || nqp::existskey($p, 'LAST') || nqp::existskey($p, 'NEXT'))
}
sub monkey_see_no_eval($/) {
my $msne := $*LANG.pragma('MONKEY-SEE-NO-EVAL');
nqp::defined($msne)
?? $msne # prevails if defined, can be either 1 or 0
!! $*COMPILING_CORE_SETTING ||
try { $*W.find_symbol(['&MONKEY-SEE-NO-EVAL'])() } ||
nqp::getenvhash<RAKUDO_MONKEY_BUSINESS>;
}
role STDActions {
method quibble($/) {
make $<nibble>.ast;
}
method trim_heredoc($/, $doc, $stop, $origast) {
$origast.pop();
$origast.pop();
my str $ws := $stop.MATCH<ws>.Str;
my int $actualchars := nqp::chars($ws);
my int $indent := -$actualchars;
my int $tabstop := $*W.find_symbol(['$?TABSTOP']);
my int $checkidx := 0;
while $checkidx < $actualchars {
if nqp::eqat($ws, "\t", $checkidx) {
$indent := $indent - ($tabstop - 1);
}
$checkidx := $checkidx + 1;
}
my $docast := $doc.MATCH.ast;
if $docast.has_compile_time_value {
my $dedented := nqp::unbox_s($docast.compile_time_value.indent($indent));
$origast.push($*W.add_string_constant($dedented));
}
else {
# we need to remove spaces from the beginnings of only textual lines,
# so we have to track after each concatenation if the spaces at the
# beginning of our chunk belong to a fresh line or come after an
# interpolation or something
my $in-fresh-line := 1;
sub descend($node) {
if nqp::istype($node, QAST::Want) {
if +@($node) == 3 && $node[1] eq "Ss" {
my $strval := $node[0].compile_time_value;
if !$in-fresh-line {
if $strval ~~ /\n/ {
my $strbox := nqp::box_s(nqp::x(" ", -$indent) ~ nqp::unbox_s($strval), $*W.find_symbol(["Str"]));
$strval := nqp::unbox_s($strbox.indent($indent));
$in-fresh-line := 1;
return $*W.add_string_constant($strval);
}
} else {
$strval := nqp::unbox_s($strval.indent($indent));
return $*W.add_string_constant($strval);
}
}
} elsif nqp::istype($node, QAST::Op) && $node.op eq 'call' && $node.name eq '&infix:<~>' {
my @results;
# since we have the $in-fresh-line state, we need to traverse
# and replace the child nodes in order
for @($node) {
nqp::push(@results, descend($node.shift))
}
for @results {
nqp::push($node, $_)
}
return $node;
}
$in-fresh-line := 0;
return $node
}
$origast.push(descend($docast))
}
CONTROL {
if nqp::getextype($_) == nqp::const::CONTROL_WARN {
$/.worry(nqp::getmessage($_));
nqp::resume($_);
}
nqp::rethrow($_);
}
$origast;
}
}
class Perl6::Actions is HLL::Actions does STDActions {
our @MAX_PERL_VERSION;
# Could add to this based on signatures.
our %commatrap := nqp::hash(
'&categorize', 1,
'&classify', 1,
'&first', 2,
'&grep', 2,
'&map', 1,
'&reduce', 1,
'&sort', 1,
);
INIT {
# If, e.g., we support Perl up to v6.1.2, set
# @MAX_PERL_VERSION to [6, 1, 2].
@MAX_PERL_VERSION[0] := 6;
}
sub sink($past) {
QAST::Want.new(
$past,
'v', QAST::Op.new( :op('p6sink'), $past )
)
}
my %sinkable := nqp::hash(
'call', 1,
'callmethod', 1,
'if', 1,
'while', 1,
'unless', 1,
'until', 1,
'repeat_until', 1,
'repeat_while', 1,
'handle', 1,
'hllize', 1,
);
sub autosink($past) {
nqp::istype($past, QAST::Op) && %sinkable{$past.op} && $*statement_level && !$past.nosink
?? sink($past)
!! $past;
}
method ints_to_string($ints) {
if nqp::islist($ints) {
my $result := '';
for $ints {
$result := $result ~ nqp::chr(nqp::unbox_i($_.ast));
}
$result;
} else {
nqp::chr(nqp::unbox_i($ints.ast));
}
}
sub string_to_int($src, int $base, int $chars) {
my $res := nqp::radix($base, ~$src, 0, 2);
$src.panic("'$src' is not a valid number")
unless nqp::iseq_i(nqp::atpos($res, 2), $chars);
nqp::box_i(nqp::atpos($res, 0), $*W.find_symbol(['Int']));
}
sub string_to_bigint($src, int $base, int $chars) {
my $res := nqp::radix_I($base, ~$src, 0, 2, $*W.find_symbol(['Int']));
$src.panic("'$src' is not a valid number")
unless nqp::iseq_i(nqp::unbox_i(nqp::atpos($res, 2)), $chars);
nqp::atpos($res, 0);
}
sub xblock_immediate_with($xblock) {
$xblock[1] := pblock_immediate_with($xblock[1]);
$xblock;
}
sub xblock_immediate($xblock) {
$xblock[1] := pblock_immediate($xblock[1]);
$xblock;
}
sub pblock_immediate_with($pblock) {
my $pb := block_immediate($pblock.ann('uninstall_if_immediately_used').shift);
$pb.arity(1); # gotta force this, or Block node gets optimized away
$pb;
}
sub pblock_immediate($pblock) {
block_immediate($pblock.ann('uninstall_if_immediately_used').shift);
}
our sub block_immediate($block) {
$block.blocktype('immediate');
$block;
}
method deflongname($/) {
if $<colonpair> {
my $name := ~$<name>;
for $<colonpair> {
my $key := $_<identifier> || '';
if $_<coloncircumfix> -> $cf {
if $cf<circumfix> -> $op_name {
$name := $name ~ $*W.canonicalize_pair($key, $*W.colonpair_nibble_to_str(
$/, $op_name<nibble> // $op_name<semilist> // $op_name<pblock>));
}
else {
$name := $name ~ ':' ~ $key;
}
}
else {
$name := $name ~ ':' ~ $key;
}
}
make $name;
}
else {
make $*W.dissect_deflongname($/).name(
:dba("$*IN_DECL declaration"),
:decl<routine>,
);
}
}
method deftermnow($/) {
# 'my \foo' style declaration
if $*SCOPE ne 'my' {
$*W.throw($/, 'X::Comp::NYI',
feature => "$*SCOPE scoped term definitions (only 'my' is supported at the moment)");
}
my $name := $<defterm>.ast;
my $cur_lexpad := $*W.cur_lexpad;
if $cur_lexpad.symbol($name) {
$*W.throw($/, ['X', 'Redeclaration'], symbol => $name);
}
if $*OFTYPE {
my $type := $*OFTYPE.ast;
$cur_lexpad[0].push(QAST::Var.new( :$name, :scope('lexical'),
:decl('var'), :returns($type) ));
$cur_lexpad.symbol($name, :$type, :scope<lexical>);
}
else {
$cur_lexpad[0].push(QAST::Var.new(:$name, :scope('lexical'), :decl('var')));
$cur_lexpad.symbol($name, :scope('lexical'));
}
make $<defterm>.ast;
}
method defterm($/) {
my $name := ~$<identifier>;
if $<colonpair> {
for $<colonpair> {
my $key := $_<identifier> || '';
if $_<coloncircumfix> -> $cf {
if $cf<circumfix> -> $op_name {
$name := $name ~ $*W.canonicalize_pair($key, $*W.colonpair_nibble_to_str($/, $op_name<nibble>));
}
else {
$name := $name ~ ':' ~ $key;
}
}
else {
$name := $name ~ ':' ~ $key;
}
}
}
make $name;
}
# Turn $code into "for lines() { $code }"
sub wrap_option_n_code($/, $code) {
$code := make_topic_block_ref($/, $code, copy => 1);
my $past := QAST::Op.new(:op<callmethod>, :name<map>,
QAST::Op.new(:op<call>, :name<&lines>),
QAST::Op.new(:op<p6capturelex>, $code)
);
$past := QAST::Want.new(
QAST::Op.new( :op<callmethod>, :name<sink>, $past ),
'v', QAST::Op.new( :op<callmethod>, :name<sink>, $past )
);
}
# Turn $code into "for lines() { $code; say $_ }"
# &wrap_option_n_code already does the C<for> loop, so we just add the
# C<say> call here
sub wrap_option_p_code($/, $code) {
wrap_option_n_code($/,
QAST::Stmts.new(
$code,
QAST::Op.new(:name<&say>, :op<call>,
QAST::Var.new(:name<$_>, :scope<lexical>)
)
)
)
}
method comp_unit($/) {
# Finish up code object for the mainline.
if $*DECLARAND {
$*W.attach_signature($*DECLARAND, $*W.create_signature(
nqp::hash('parameter_objects', [])));
$*W.finish_code_object($*DECLARAND, $*UNIT);
$*W.add_phasers_handling_code($*DECLARAND, $*UNIT);
}
# Checks.
$*W.assert_stubs_defined($/);
$*W.sort_protos();
# Get the block for the unit mainline code.
my $unit := $*UNIT;
my $mainline := QAST::Stmts.new(
$*POD_PAST,
statementlist_with_handlers($/)
);
# Errors/warnings in sinking pass should ignore highwater mark.
$/.'!clear_highwater'();
unless $*NEED_RESULT {
# Evaluate last statement in sink context, by pushing another
# statement after it, unless we need the result.
unwantall($mainline, 'comp_unit');
$mainline.push(QAST::WVal.new( :value($*W.find_symbol(['Nil'])) ));
}
fatalize($mainline) if $*FATAL;
# Emit any worries. Note that unwanting $mainline can produce worries.
if @*WORRIES {
stderr().print($*W.group_exception().gist());
}
if %*COMPILING<%?OPTIONS><p> { # also covers the -np case, like Perl 5
$mainline[1] := QAST::Stmt.new(wrap_option_p_code($/, $mainline[1]));
}
elsif %*COMPILING<%?OPTIONS><n> {
$mainline[1] := QAST::Stmt.new(wrap_option_n_code($/, $mainline[1]));
}
# We'll install our view of GLOBAL as the main one; any other
# compilation unit that is using this one will then replace it
# with its view later (or be in a position to restore it).
my $global_install := QAST::Op.new(
:op('bindcurhllsym'),
QAST::SVal.new( :value('GLOBAL') ),
QAST::WVal.new( :value($*GLOBALish) )
);
$*W.add_fixup_task(:deserialize_ast($global_install), :fixup_ast($global_install));
# Get the block for the entire compilation unit.
my $outer := $*UNIT_OUTER;
$outer.node($/);
$*UNIT_OUTER.unshift(QAST::Var.new( :name('__args__'), :scope('local'), :decl('param'), :slurpy(1) ));
$unit.name('<unit>');
$outer.name('<unit-outer>');
# Load the needed libraries.
$*W.add_libs($unit);
# If the unit defines &MAIN, and this is in the mainline,
# add a &MAIN_HELPER.
if !$*W.is_precompilation_mode && +(@*MODULES // []) == 0 && $unit.symbol('&MAIN') {
$mainline := QAST::Op.new(
:op('call'),
:name('&MAIN_HELPER'),
$mainline,
);
}
# If our caller wants to know the mainline ctx, provide it here.
# (CTXSAVE is inherited from HLL::Actions.) Don't do this when
# there was an explicit {YOU_ARE_HERE}.
unless $*HAS_YOU_ARE_HERE {
$unit.push( self.CTXSAVE() );
}
# Add the mainline code to the unit.
$unit.push($mainline);
# Executing the compilation unit causes the mainline to be executed.
$outer.push(QAST::Op.new( :op<call>, $unit ));
# Do not want closure semantics on this outermost scope.
$unit.blocktype('declaration_static');
# Wrap everything in a QAST::CompUnit.
my $compunit := QAST::CompUnit.new(
:hll('perl6'),
# Serialization related bits.
:sc($*W.sc()),
:code_ref_blocks($*W.code_ref_blocks()),
:compilation_mode($*W.is_precompilation_mode()),
:pre_deserialize($*W.load_dependency_tasks()),
:post_deserialize($*W.fixup_tasks()),
:is_nested($*W.is_nested()),
:repo_conflict_resolver(QAST::Op.new(
:op('callmethod'), :name('resolve_repossession_conflicts'),
QAST::WVal.new( :value($*W.find_symbol(['CompUnit', 'RepositoryRegistry'])) )
)),
# If this unit is loaded as a module, we want it to automatically
# execute the mainline code above after all other initializations
# have occurred.
:load(QAST::Op.new(
:op('call'),
QAST::BVal.new( :value($outer) ),
)),
# Finally, the outer block, which in turn contains all of the
# other program elements.