/
Actions.pm
5431 lines (4948 loc) · 202 KB
/
Actions.pm
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use NQPP6QRegex;
use Perl6::Pod;
use Perl6::ConstantFolder;
use QRegex;
use PASTRegex; # For PAST
INIT {
# Add our custom nqp:: opcodes.
PAST::Node.map_add('nqp',
p6box_i => 'perl6_box_int__Pi',
p6box_n => 'perl6_box_num__Pn',
p6box_s => 'perl6_box_str__Ps',
p6bool => 'perl6_booleanize__Pi',
p6bigint => 'perl6_box_bigint__Pn',
p6parcel => 'perl6_parcel_from_rpa__PPP',
p6listiter => 'perl6_iter_from_rpa__PPP',
p6list => 'perl6_list_from_rpa__PPPP',
p6decont => 'perl6_decontainerize__PP',
p6recont_ro => 'perl6_recontainerize_to_ro__PP',
attrinited => 'repr_is_attr_initialized__IPPs',
callerid => 'perl6_callerid__I',
# islist => 'perl6_is_list__IP',
ishash => 'perl6_is_hash__IP',
lcm_i => 'lcm__Iii',
gcd_i => 'gcd__Iii',
sqrt_n => 'sqrt__NN',
find_method => 'find_method__PPs',
create => 'repr_instance_of__PP',
exit => 'exit__vi',
want => nqp::hash('WHAT', PAST::Want),
);
}
class Perl6::Actions is HLL::Actions {
our @MAX_PERL_VERSION;
our $FORBID_PIR;
our $STATEMENT_PRINT;
INIT {
# Tell PAST::Var how to encode Perl6Str and Str values
my %valflags :=
Q:PIR { %r = get_hll_global ['PAST';'Compiler'], '%valflags' };
%valflags<Perl6Str> := 'e';
%valflags<Str> := 'e';
# If, e.g., we support Perl up to v6.1.2, set
# @MAX_PERL_VERSION to [6, 1, 2].
@MAX_PERL_VERSION[0] := 6;
$FORBID_PIR := 0;
$STATEMENT_PRINT := 0;
}
sub p6box_s($s) {
nqp::box_s($s, $*W.find_symbol(['Str']));
}
method ints_to_string($ints) {
if pir::does($ints, 'array') {
my $result := '';
for $ints {
$result := $result ~ nqp::chr(nqp::unbox_i($_.ast));
}
$result;
} else {
nqp::chr(nqp::unbox_i($ints.ast));
}
}
# TODO: inline string_to_bigint?
my sub string_to_bigint($src, $base) {
my $res := nqp::radix_I($base, ~$src, 0, 2, $*W.find_symbol(['Int']));
$src.CURSOR.panic("'$src' is not a valid number")
unless nqp::iseq_i(nqp::unbox_i(nqp::atkey($res, 2)), nqp::chars($src));
nqp::atkey($res, 0);
}
sub xblock_immediate($xblock) {
$xblock[1] := pblock_immediate($xblock[1]);
$xblock;
}
sub pblock_immediate($pblock) {
block_immediate($pblock<uninstall_if_immediately_used>.shift);
}
our sub block_immediate($block) {
$block.blocktype('immediate');
$block;
}
# Given a sigil and the the value type specified, works out the
# container type (what should we instantiate and bind into the
# attribute/lexpad), bind constraint (what could we bind to this
# slot later), and if specified a constraint on the inner value
# and a default value.
sub container_type_info($/, $sigil, @value_type, $shape?) {
my %info;
if $sigil eq '@' {
%info<container_base> := $*W.find_symbol(['Array']);
%info<bind_constraint> := $*W.find_symbol(['Positional']);
if @value_type {
%info<container_type> := $*W.parameterize_type_with_args(
%info<container_base>, [@value_type[0]], nqp::hash());
%info<bind_constraint> := $*W.parameterize_type_with_args(
%info<bind_constraint>, [@value_type[0]], nqp::hash());
%info<value_type> := @value_type[0];
}
else {
%info<container_type> := %info<container_base>;
%info<value_type> := $*W.find_symbol(['Mu']);
}
if $shape {
$*W.throw($/, 'X::Comp::NYI', feature => 'Shaped arrays');
}
}
elsif $sigil eq '%' {
%info<container_base> := $*W.find_symbol(['Hash']);
%info<bind_constraint> := $*W.find_symbol(['Associative']);
if $shape {
@value_type[0] := $*W.find_symbol(['Mu']) unless +@value_type;
my $shape_ast := $shape[0].ast;
if $shape_ast.isa(PAST::Stmts) && +@($shape_ast) == 1 && $shape_ast[0]<has_compile_time_value> {
@value_type[1] := $shape_ast[0]<compile_time_value>;
}
else {
nqp::die("Invalid hash shape; type expected");
}
}
if @value_type {
%info<container_type> := $*W.parameterize_type_with_args(
%info<container_base>, @value_type, nqp::hash());
%info<bind_constraint> := $*W.parameterize_type_with_args(
%info<bind_constraint>, @value_type, nqp::hash());
%info<value_type> := @value_type[0];
}
else {
%info<container_type> := %info<container_base>;
%info<value_type> := $*W.find_symbol(['Mu']);
}
}
elsif $sigil eq '&' {
%info<container_base> := $*W.find_symbol(['Scalar']);
%info<container_type> := %info<container_base>;
%info<bind_constraint> := $*W.find_symbol(['Callable']);
if @value_type {
%info<bind_constraint> := $*W.parameterize_type_with_args(
%info<bind_constraint>, [@value_type[0]], nqp::hash());
}
%info<value_type> := %info<bind_constraint>;
%info<default_value> := $*W.find_symbol(['Any']);
}
else {
%info<container_base> := $*W.find_symbol(['Scalar']);
%info<container_type> := %info<container_base>;
if @value_type {
%info<bind_constraint> := @value_type[0];
%info<value_type> := @value_type[0];
%info<default_value> := @value_type[0];
}
else {
%info<bind_constraint> := $*W.find_symbol(['Mu']);
%info<value_type> := $*W.find_symbol(['Mu']);
%info<default_value> := $*W.find_symbol(['Any']);
}
}
%info
}
method deflongname($/) {
make $<colonpair>
?? ~$<name> ~ ':<' ~ ~$<colonpair>[0]<circumfix><quote_EXPR><quote_delimited><quote_atom>[0] ~ '>'
!! ~$<name>;
}
# Turn $code into "for lines() { $code }"
sub wrap_option_n_code($/, $code) {
$code := make_topic_block_ref($code, copy => 1);
return PAST::Op.new(:name<&eager>,
PAST::Op.new(:pasttype<callmethod>, :name<map>,
PAST::Op.new( :name<&flat>,
PAST::Op.new(:name<&flat>,
PAST::Op.new(
:name<&lines>,
:pasttype<call>
)
)
),
$code
)
);
}
# Turn $code into "for lines() { $code; say $_ }"
# &wrap_option_n_code already does the C<for> loop, so we just add the
# C<say> call here
sub wrap_option_p_code($/, $code) {
return wrap_option_n_code($/,
PAST::Stmts.new(
$code,
PAST::Op.new(:name<&say>, :pasttype<call>,
PAST::Var.new(:name<$_>)
)
)
);
}
method comp_unit($/, $key?) {
our $?RAKUDO_HLL;
# Finish up code object for the mainline.
if $*DECLARAND {
$*W.attach_signature($*DECLARAND, $*W.create_signature([]));
$*W.finish_code_object($*DECLARAND, $*UNIT);
}
# Checks.
$*W.assert_stubs_defined($/);
# Get the block for the unit mainline code.
my $unit := $*UNIT;
my $mainline := PAST::Stmts.new(
$*POD_PAST,
$<statementlist>.ast,
);
if %*COMPILING<%?OPTIONS><p> { # also covers the -np case, like Perl 5
$mainline := wrap_option_p_code($/, $mainline);
}
elsif %*COMPILING<%?OPTIONS><n> {
$mainline := wrap_option_n_code($/, $mainline);
}
# Unit needs to have a load-init holding the deserialization or
# fixup code for this compilation unit.
$unit.loadinit().push($*W.to_past());
# 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).
$unit.loadinit().push(PAST::Op.new(
:pasttype('bind_6model'),
PAST::Var.new( :name('GLOBAL'), :namespace([]), :scope('package') ),
$*W.get_ref($*GLOBALish)
));
# Mainline should have fresh lexicals.
$*W.get_static_lexpad($unit).set_fresh_magicals();
# Get the block for the entire compilation unit.
my $outer := $*UNIT_OUTER;
$outer.node($/);
# Set HLL and load the needed libraries.
$outer.hll('perl6');
$*W.add_libs($unit);
# If the unit defines &MAIN, add a &MAIN_HELPER.
if $unit.symbol('&MAIN') {
$mainline := PAST::Op.new(
:pasttype('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.
# We force a return here, because we have other :load/:init blocks
# that have to be done at the end of the unit, and we don't want them
# executed by the mainline.
$outer.push(
PAST::Op.new(
:pirop('return'),
PAST::Op.new( :pasttype<call>, $unit )
)
);
# If this unit is loaded via load_bytecode, we want it to automatically
# execute the mainline code above after all other initializations have
# occurred.
$outer.push(
PAST::Block.new(
:pirflags(':load'), :lexical(0), :namespace(''),
PAST::Op.new(
:pasttype('call'),
PAST::Val.new( :value($outer) ),
)
)
);
# Pass some extra bits along to the optimizer.
$outer<UNIT> := $unit;
$outer<GLOBALish> := $*GLOBALish;
$outer<W> := $*W;
make $outer;
}
method install_doc_phaser($/) {
# Add a default DOC INIT phaser
my $doc := %*COMPILING<%?OPTIONS><doc>;
if $doc {
my $block := $*W.push_lexpad($/);
my $renderer := "Pod::To::$doc";
my $module := $*W.load_module($/, $renderer, $*GLOBALish);
my $pod2text := PAST::Op.new(
:pasttype<callmethod>, :name<render>, :node($/),
self.make_indirect_lookup([$renderer]),
PAST::Var.new(:name<$=pod>, :node($/))
);
$block.push(
PAST::Op.new(
:pasttype<call>, :node($/),
:name('&say'), $pod2text,
),
);
# TODO: We should print out $?USAGE too,
# once it's known at compile time
$block.push(
PAST::Op.new(
:pasttype<call>, :node($/),
:name('&exit'),
),
);
$*W.pop_lexpad();
$*W.add_phaser(
$/, 'INIT', $*W.create_simple_code_object($block, 'Block')
);
}
}
method pod_content_toplevel($/) {
my $child := $<pod_block>.ast;
# make sure we don't push the same thing twice
if $child {
my $id := $/.from ~ "," ~ ~$/.to;
if !$*POD_BLOCKS_SEEN{$id} {
$*POD_BLOCKS.push($child);
$*POD_BLOCKS_SEEN{$id} := 1;
}
}
make $child;
}
method pod_content:sym<block>($/) {
make $<pod_block>.ast;
}
method pod_block:sym<delimited>($/) {
make Perl6::Pod::any_block($/);
}
method pod_block:sym<delimited_raw>($/) {
make Perl6::Pod::raw_block($/);
}
method pod_block:sym<delimited_table>($/) {
make Perl6::Pod::table($/);
}
method pod_block:sym<paragraph>($/) {
make Perl6::Pod::any_block($/);
}
method pod_block:sym<paragraph_raw>($/) {
make Perl6::Pod::raw_block($/);
}
method pod_block:sym<paragraph_table>($/) {
make Perl6::Pod::table($/);
}
method pod_block:sym<abbreviated>($/) {
make Perl6::Pod::any_block($/);
}
method pod_block:sym<abbreviated_raw>($/) {
make Perl6::Pod::raw_block($/);
}
method pod_block:sym<abbreviated_table>($/) {
make Perl6::Pod::table($/);
}
method pod_block:sym<end>($/) {
}
method pod_content:sym<config>($/) {
make Perl6::Pod::config($/);
}
method pod_content:sym<text>($/) {
my @ret := [];
for $<pod_textcontent> {
@ret.push($_.ast);
}
my $past := Perl6::Pod::serialize_array(@ret);
make $past<compile_time_value>;
}
method pod_textcontent:sym<regular>($/) {
my @t := Perl6::Pod::merge_twines($<pod_string>);
my $twine := Perl6::Pod::serialize_array(@t)<compile_time_value>;
make Perl6::Pod::serialize_object(
'Pod::Block::Para', :content($twine)
)<compile_time_value>
}
method pod_textcontent:sym<code>($/) {
my $s := $<spaces>.Str;
my $t := subst($<text>.Str, /\n$s/, "\n", :global);
$t := subst($t, /\n$/, ''); # chomp!
my $past := Perl6::Pod::serialize_object(
'Pod::Block::Code',
:content(Perl6::Pod::serialize_aos([$t])<compile_time_value>),
);
make $past<compile_time_value>;
}
method pod_formatting_code($/) {
if ~$<code> eq 'V' {
make ~$<content>;
} else {
my @content := [];
for $<pod_string_character> {
@content.push($_.ast)
}
my @t := Perl6::Pod::build_pod_string(@content);
my $past := Perl6::Pod::serialize_object(
'Pod::FormattingCode',
:type(
$*W.add_string_constant(~$<code>)<compile_time_value>
),
:content(
Perl6::Pod::serialize_array(@t)<compile_time_value>
)
);
make $past<compile_time_value>;
}
}
method pod_string($/) {
my @content := [];
for $<pod_string_character> {
@content.push($_.ast)
}
make Perl6::Pod::build_pod_string(@content);
}
method pod_string_character($/) {
if $<pod_formatting_code> {
make $<pod_formatting_code>.ast
} else {
make ~$<char>;
}
}
method table_row($/) {
make ~$/
}
method unitstart($/) {
# Use SET_BLOCK_OUTER_CTX (inherited from HLL::Actions)
# to set dynamic outer lexical context and namespace details
# for the compilation unit.
self.SET_BLOCK_OUTER_CTX($*UNIT_OUTER);
}
method statementlist($/) {
my $past := PAST::Stmts.new( :node($/) );
if $<statement> {
for $<statement> {
my $ast := $_.ast;
if $ast {
if $ast<sink_past> {
$ast := PAST::Want.new($ast, 'v', $ast<sink_past>);
}
elsif $ast<bare_block> {
$ast := $ast<bare_block>;
}
$ast := PAST::Stmt.new($ast, :type($ast.type)) if $ast ~~ PAST::Node;
$past.push( $ast );
}
}
}
if +$past.list < 1 {
$past.push(PAST::Var.new(:name('Nil'), :scope('lexical_6model')));
}
else {
$past.type($past[+@($past) - 1].type);
}
make $past;
}
method semilist($/) {
my $past := PAST::Stmts.new( :node($/) );
if $<statement> {
for $<statement> { $past.push($_.ast); }
}
else {
$past.push( PAST::Op.new( :name('&infix:<,>') ) );
}
make $past;
}
method statement($/, $key?) {
my $past;
if $<EXPR> {
my $mc := $<statement_mod_cond>[0];
my $ml := $<statement_mod_loop>[0];
$past := $<EXPR>.ast;
if $mc {
$mc.ast.push($past);
$mc.ast.push(PAST::Var.new(:name('Nil'), :scope('lexical_6model')));
$past := $mc.ast;
}
if $ml {
my $cond := $ml<smexpr>.ast;
if ~$ml<sym> eq 'given' {
$past := PAST::Op.new(
:pasttype('call'),
make_topic_block_ref($past),
$cond
);
}
elsif ~$ml<sym> eq 'for' {
unless $past<past_block> {
$past := make_topic_block_ref($past);
}
$past := PAST::Op.new(
:name<&eager>, :node($/),
PAST::Op.new(
:pasttype<callmethod>, :name<map>, :node($/),
PAST::Op.new(:name('&infix:<,>'), $cond),
block_closure($past)
));
}
else {
$past := PAST::Op.new($cond, $past, :pasttype(~$ml<sym>), :node($/) );
}
}
}
elsif $<statement_control> { $past := $<statement_control>.ast; }
else { $past := 0; }
if $STATEMENT_PRINT && $past {
$past := PAST::Stmts.new(:node($/),
PAST::Op.new(
:pirop<say__vs>,
PAST::Val.new(:value(~$/))
),
$past
);
}
make $past;
}
method xblock($/) {
make PAST::Op.new( $<EXPR>.ast, $<pblock>.ast, :pasttype('if'), :node($/) );
}
method pblock($/) {
if $<blockoid><you_are_here> {
make $<blockoid>.ast;
}
else {
# Locate or build a set of parameters.
my @params;
my $block := $<blockoid>.ast;
if $block<placeholder_sig> && $<signature> {
$*W.throw($/, ['X', 'Signature', 'Placeholder']);
}
elsif $block<placeholder_sig> {
@params := $block<placeholder_sig>;
}
elsif $<signature> {
@params := $<signature>.ast;
}
else {
unless $block.symbol('$_') {
if $*IMPLICIT {
@params.push(hash(
:variable_name('$_'), :optional(1),
:nominal_type($*W.find_symbol(['Mu'])),
:default_from_outer(1), :is_parcel(1),
));
}
add_implicit_var($block, '$_');
}
}
# Create signature object and set up binding.
if $<lambda> eq '<->' {
for @params { $_<is_rw> := 1 }
}
set_default_parameter_type(@params, 'Mu');
my $signature := create_signature_object($<signature>, @params, $block);
add_signature_binding_code($block, $signature, @params);
# Add a slot for a $*DISPATCHER, and a call to take one.
add_implicit_var($block, '$*DISPATCHER');
$block[0].unshift(PAST::Op.new(:pirop('perl6_take_dispatcher v')));
# We'll install PAST in current block so it gets capture_lex'd.
# Then evaluate to a reference to the block (non-closure - higher
# up stuff does that if it wants to).
($*W.cur_lexpad())[0].push(my $uninst := PAST::Stmts.new($block));
$*W.attach_signature($*DECLARAND, $signature);
$*W.finish_code_object($*DECLARAND, $block);
my $ref := reference_to_code_object($*DECLARAND, $block);
$ref<uninstall_if_immediately_used> := $uninst;
make $ref;
}
}
method block($/) {
my $block := $<blockoid>.ast;
if $block<placeholder_sig> {
my $name := $block<placeholder_sig>[0]<variable_name>;
unless $name eq '%_' || $name eq '@_' {
$name := nqp::concat_s(nqp::substr($name, 0, 1),
nqp::concat_s('^', nqp::substr($name, 1)));
}
$*W.throw( $/, ['X', 'Placeholder', 'Block'],
placeholder => $name,
);
}
($*W.cur_lexpad())[0].push(my $uninst := PAST::Stmts.new($block));
$*W.attach_signature($*DECLARAND, $*W.create_signature([]));
$*W.finish_code_object($*DECLARAND, $block);
my $ref := reference_to_code_object($*DECLARAND, $block);
$ref<uninstall_if_immediately_used> := $uninst;
make $ref;
}
method blockoid($/) {
if $<statementlist> {
my $past := $<statementlist>.ast;
my $BLOCK := $*CURPAD;
$BLOCK.push($past);
$BLOCK.node($/);
make $BLOCK;
}
else {
if $*HAS_YOU_ARE_HERE {
$/.CURSOR.panic('{YOU_ARE_HERE} may only appear once in a setting');
}
$*HAS_YOU_ARE_HERE := 1;
make $<you_are_here>.ast;
}
}
method you_are_here($/) {
make self.CTXSAVE();
}
method newpad($/) {
my $new_block := $*W.cur_lexpad();
$new_block<IN_DECL> := $*IN_DECL;
}
method finishpad($/) {
# Generate the $_, $/, and $! lexicals if they aren't already
# declared. We don't actually give them a value, but rather the
# Perl6LexPad will generate containers (and maybe fill them with
# the outer's value) on demand.
my $BLOCK := $*W.cur_lexpad();
my $type := $BLOCK<IN_DECL>;
my $is_routine := $type eq 'sub' || $type eq 'method' ||
$type eq 'submethod' || $type eq 'mainline';
for ($is_routine ?? <$_ $/ $!> !! ['$_']) {
# Generate the lexical variable except if...
# (1) the block already has one, or
# (2) the variable is '$_' and $*IMPLICIT is set
# (this case gets handled by getsig)
unless $BLOCK.symbol($_) || ($_ eq '$_' && $*IMPLICIT) {
add_implicit_var($BLOCK, $_);
}
}
}
## Statement control
method statement_control:sym<if>($/) {
my $count := +$<xblock> - 1;
my $past := xblock_immediate( $<xblock>[$count].ast );
# push the else block if any, otherwise 'if' returns C<Nil> (per S04)
$past.push( $<else>
?? pblock_immediate( $<else>[0].ast )
!! PAST::Var.new(:name('Nil'), :scope('lexical_6model'))
);
# build if/then/elsif structure
while $count > 0 {
$count--;
my $else := $past;
$past := xblock_immediate( $<xblock>[$count].ast );
$past.push($else);
}
make $past;
}
method statement_control:sym<unless>($/) {
my $past := xblock_immediate( $<xblock>.ast );
$past.pasttype('unless');
make $past;
}
method statement_control:sym<while>($/) {
my $past := xblock_immediate( $<xblock>.ast );
$past.pasttype(~$<sym>);
make $past;
}
method statement_control:sym<repeat>($/) {
my $pasttype := 'repeat_' ~ ~$<wu>;
my $past;
if $<xblock> {
$past := xblock_immediate( $<xblock>.ast );
$past.pasttype($pasttype);
}
else {
$past := PAST::Op.new( $<EXPR>.ast, pblock_immediate( $<pblock>.ast ),
:pasttype($pasttype), :node($/) );
}
make $past;
}
method statement_control:sym<for>($/) {
my $xblock := $<xblock>.ast;
my $past := PAST::Op.new(
:pasttype<callmethod>, :name<map>, :node($/),
PAST::Op.new(:name('&infix:<,>'), $xblock[0]),
block_closure($xblock[1])
);
$past := PAST::Op.new( :name<&eager>, $past, :node($/) );
make $past;
}
method statement_control:sym<loop>($/) {
my $block := pblock_immediate($<block>.ast);
my $cond := $<e2> ?? $<e2>[0].ast !! PAST::Var.new(:name<True>, :scope<lexical_6model>);
my $loop := PAST::Op.new( $cond, $block, :pasttype('while'), :node($/) );
if $<e3> {
$loop.push( $<e3>[0].ast );
}
if $<e1> {
$loop := PAST::Stmts.new( $<e1>[0].ast, $loop, :node($/) );
}
make $loop;
}
method statement_control:sym<need>($/) {
my $past := PAST::Var.new( :name('Nil'), :scope('lexical') );
for $<version> {
# XXX TODO: Version checks.
}
make $past;
}
method statement_control:sym<import>($/) {
my $past := PAST::Var.new( :name('Nil'), :scope('lexical') );
make $past;
}
method statement_control:sym<use>($/) {
my $past := PAST::Var.new( :name('Nil'), :scope('lexical') );
if $<version> {
# TODO: replace this by code that doesn't always die with
# a useless error message
# my $i := -1;
# for $<version><vnum> {
# ++$i;
# if $_ ne '*' && $_ < @MAX_PERL_VERSION[$i] {
# last;
# } elsif $_ > @MAX_PERL_VERSION[$i] {
# my $mpv := nqp::join('.', @MAX_PERL_VERSION);
# $/.CURSOR.panic("Perl $<version> required--this is only v$mpv")
# }
# }
} elsif $<module_name> {
if ~$<module_name> eq 'fatal' {
my $*SCOPE := 'my';
declare_variable($/, PAST::Stmts.new(), '$', '*', 'FATAL', []);
$past := PAST::Op.new(
:pirop('perl6_container_store__0PP'), :node($/),
PAST::Var.new( :name('$*FATAL'), :scope('lexical_6model') ),
PAST::Op.new( :pirop('perl6_booleanize PI'), 1 )
);
}
elsif ~$<module_name> eq 'FORBID_PIR' {
$FORBID_PIR := 1;
}
elsif ~$<module_name> eq 'Devel::Trace' {
$STATEMENT_PRINT := 1;
}
}
make $past;
}
method statement_control:sym<require>($/) {
my $past := PAST::Stmts.new(:node($/));
my $name_past := $<module_name>
?? PAST::Val.new(:value($<module_name><longname><name>.Str))
!! $<EXPR>[0].ast;
$past.push(PAST::Op.new(
:pasttype('callmethod'), :name('load_module'),
PAST::Var.new( :name('ModuleLoader'), :namespace([]), :scope('package') ),
$name_past, $*W.symbol_lookup(['GLOBAL'], $/)
));
if $<module_name> && $<EXPR> {
my $p6_arglist := $*W.compile_time_evaluate($/, $<EXPR>[0].ast).list.eager;
my $arglist := nqp::getattr($p6_arglist, $*W.find_symbol(['List']), '$!items');
my $lexpad := $*W.cur_lexpad();
my $*SCOPE := 'my';
my $import_past := PAST::Op.new(:node($/), :pasttype<call>,
:name<&REQUIRE_IMPORT>,
$name_past);
for $arglist {
my $symbol := nqp::unbox_s($_.Str());
$*W.throw($/, ['X', 'Redeclaration'], :$symbol)
if $lexpad.symbol($symbol);
declare_variable($/, $past,
nqp::substr($symbol, 0, 1), '', nqp::substr($symbol, 1),
[]);
$import_past.push($*W.add_string_constant($symbol));
}
$past.push($import_past);
}
make $past;
}
method statement_control:sym<given>($/) {
my $past := $<xblock>.ast;
$past.push($past.shift); # swap [0] and [1] elements
$past.pasttype('call');
make $past;
}
method statement_control:sym<when>($/) {
# Get hold of the smartmatch expression and the block.
my $xblock := $<xblock>.ast;
my $sm_exp := $xblock.shift;
my $pblock := $xblock.shift;
# Handle the smart-match.
my $match_past := PAST::Op.new( :pasttype('callmethod'), :name('ACCEPTS'),
$sm_exp,
PAST::Var.new( :name('$_'), :scope('lexical_6model') )
);
# Use the smartmatch result as the condition for running the block,
# and ensure continue/succeed handlers are in place and that a
# succeed happens after the block.
$pblock := pblock_immediate($pblock);
make PAST::Op.new( :pasttype('if'), :node( $/ ),
$match_past, when_handler_helper($pblock)
);
}
method statement_control:sym<default>($/) {
# We always execute this, so just need the block, however we also
# want to make sure we succeed after running it.
make when_handler_helper($<block>.ast);
}
method statement_control:sym<CATCH>($/) {
if has_block_handler($*W.cur_lexpad(), 'CONTROL', :except(1)) {
$*W.throw($/, ['X', 'Phaser', 'Multiple'], block => 'CATCH');
}
my $block := $<block>.ast;
push_block_handler($/, $*W.cur_lexpad(), $block, 'CONTROL', :except(1));
make PAST::Var.new( :name('Nil'), :scope('lexical') );
}
method statement_control:sym<CONTROL>($/) {
if has_block_handler($*W.cur_lexpad(), 'CONTROL') {
$*W.throw($/, ['X', 'Phaser', 'Multiple'], block => 'CONTROL');
}
my $block := $<block>.ast;
push_block_handler($/, $*W.cur_lexpad(), $block, 'CONTROL');
make PAST::Var.new( :name('Nil'), :scope('lexical') );
}
method statement_prefix:sym<BEGIN>($/) { make $*W.add_phaser($/, 'BEGIN', ($<blorst>.ast)<code_object>); }
method statement_prefix:sym<CHECK>($/) { make $*W.add_phaser($/, 'CHECK', ($<blorst>.ast)<code_object>); }
method statement_prefix:sym<INIT>($/) { make $*W.add_phaser($/, 'INIT', ($<blorst>.ast)<code_object>); }
method statement_prefix:sym<START>($/) { make $*W.add_phaser($/, 'START', ($<blorst>.ast)<code_object>); }
method statement_prefix:sym<ENTER>($/) { make $*W.add_phaser($/, 'ENTER', ($<blorst>.ast)<code_object>); }
method statement_prefix:sym<FIRST>($/) { make $*W.add_phaser($/, 'FIRST', ($<blorst>.ast)<code_object>); }
method statement_prefix:sym<END>($/) { make $*W.add_phaser($/, 'END', ($<blorst>.ast)<code_object>); }
method statement_prefix:sym<LEAVE>($/) { make $*W.add_phaser($/, 'LEAVE', ($<blorst>.ast)<code_object>); }
method statement_prefix:sym<KEEP>($/) { make $*W.add_phaser($/, 'KEEP', ($<blorst>.ast)<code_object>); }
method statement_prefix:sym<UNDO>($/) { make $*W.add_phaser($/, 'UNDO', ($<blorst>.ast)<code_object>); }
method statement_prefix:sym<NEXT>($/) { make $*W.add_phaser($/, 'NEXT', ($<blorst>.ast)<code_object>); }
method statement_prefix:sym<LAST>($/) { make $*W.add_phaser($/, 'LAST', ($<blorst>.ast)<code_object>); }
method statement_prefix:sym<PRE>($/) { make $*W.add_phaser($/, 'PRE', ($<blorst>.ast)<code_object>, ($<blorst>.ast)<past_block>); }
method statement_prefix:sym<POST>($/) { make $*W.add_phaser($/, 'POST', ($<blorst>.ast)<code_object>, ($<blorst>.ast)<past_block>); }
method statement_prefix:sym<LAZY>($/) {
make $*W.create_lazy($/, $<blorst>.ast()<code_object>);
}
method statement_prefix:sym<DOC>($/) {
$*W.add_phaser($/, ~$<phase>, ($<blorst>.ast)<code_object>)
if %*COMPILING<%?OPTIONS><doc>;
}
method statement_prefix:sym<do>($/) {
make PAST::Op.new( :pasttype('call'), $<blorst>.ast );
}
method statement_prefix:sym<gather>($/) {
my $past := block_closure($<blorst>.ast);
make PAST::Op.new( :pasttype('call'), :name('&GATHER'), $past );
}
method statement_prefix:sym<sink>($/) {
my $blast := PAST::Op.new( $<blorst>.ast );
make PAST::Stmts.new(
PAST::Op.new( :name('&eager'), $blast ),
PAST::Var.new( :name('Nil'), :scope('lexical')),
:node($/)
);
}
method statement_prefix:sym<try>($/) {
my $block := $<blorst>.ast;
my $past;
if has_block_handler($block<past_block>, 'CONTROL', :except(1)) {
# we already have a CATCH block, nothing to do here
$past := PAST::Op.new( :pasttype('call'), $block );
} else {
$block := PAST::Op.new(:pasttype<call>, $block); # XXX should be immediate
$past := PAST::Op.new( :pasttype('try'), :handle_types_except('CONTROL'), $block );
# On failure, capture the exception object into $!.
$past.push(
PAST::Op.new(:pirop('perl6_container_store__0PP'),
PAST::Var.new(:name<$!>, :scope<lexical_6model>),
PAST::Op.new(:name<&EXCEPTION>, :pasttype<call>,
PAST::Op.new(:inline(" .get_results (%r)\n \$P0 = null\n perl6_invoke_catchhandler \$P0, %r")))));
# Otherwise, put Mu into $!.
$past.push(
PAST::Op.new(:pirop('perl6_container_store__0PP'),
PAST::Var.new( :name<$!>, :scope<lexical_6model> ),
PAST::Var.new( :name<Mu>, :scope<lexical_6model> )));
}
make $past;
}
method blorst($/) {
make $<block> ?? $<block>.ast !! make_thunk_ref($<statement>.ast, $/);
}
# Statement modifiers
method modifier_expr($/) { make $<EXPR>.ast; }
method statement_mod_cond:sym<if>($/) {
make PAST::Op.new( :pasttype<if>, $<modifier_expr>.ast, :node($/) );
}
method statement_mod_cond:sym<unless>($/) {
make PAST::Op.new( :pasttype<unless>, $<modifier_expr>.ast, :node($/) );
}
method statement_mod_cond:sym<when>($/) {
make PAST::Op.new( :pasttype<if>,
PAST::Op.new( :name('ACCEPTS'), :pasttype('callmethod'),
$<modifier_expr>.ast,
PAST::Var.new( :name('$_') ) ),
:node($/)
);
}