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World.pm
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World.pm
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use NQPHLL;
use QAST;
use Perl6::ModuleLoader;
# Binder constants.
# XXX Want constant syntax in NQP really.
my $SIG_ELEM_BIND_CAPTURE := 1;
my $SIG_ELEM_BIND_PRIVATE_ATTR := 2;
my $SIG_ELEM_BIND_PUBLIC_ATTR := 4;
my $SIG_ELEM_SLURPY_POS := 8;
my $SIG_ELEM_SLURPY_NAMED := 16;
my $SIG_ELEM_SLURPY_LOL := 32;
my $SIG_ELEM_INVOCANT := 64;
my $SIG_ELEM_MULTI_INVOCANT := 128;
my $SIG_ELEM_IS_RW := 256;
my $SIG_ELEM_IS_COPY := 512;
my $SIG_ELEM_IS_PARCEL := 1024;
my $SIG_ELEM_IS_OPTIONAL := 2048;
my $SIG_ELEM_ARRAY_SIGIL := 4096;
my $SIG_ELEM_HASH_SIGIL := 8192;
my $SIG_ELEM_DEFAULT_FROM_OUTER := 16384;
my $SIG_ELEM_IS_CAPTURE := 32768;
my $SIG_ELEM_UNDEFINED_ONLY := 65536;
my $SIG_ELEM_DEFINED_ONLY := 131072;
my $SIG_ELEM_METHOD_SLURPY_NAMED := 262144;
my $SIG_ELEM_NOMINAL_GENERIC := 524288;
my $SIG_ELEM_DEFAULT_IS_LITERAL := 1048576;
my $SIG_ELEM_NATIVE_INT_VALUE := 2097152;
my $SIG_ELEM_NATIVE_NUM_VALUE := 4194304;
my $SIG_ELEM_NATIVE_STR_VALUE := 8388608;
sub p6ize_recursive($x) {
if nqp::islist($x) {
my @copy := [];
for $x {
nqp::push(@copy, p6ize_recursive($_));
}
return pir::perl6ize_type__PP(@copy);
}
elsif nqp::ishash($x) {
my %copy := nqp::hash();
for $x {
%copy{$_.key} := p6ize_recursive($_.value);
}
return pir::perl6ize_type__PP(%copy).item;
}
pir::perl6ize_type__PP($x);
}
# This builds upon the HLL::World to add the specifics needed by Rakudo Perl 6.
class Perl6::World is HLL::World {
# The stack of lexical pads, actually as QAST::Block objects. The
# outermost frame is at the bottom, the latest frame is on top.
has @!BLOCKS;
# The stack of code objects; phasers get attached to the top one.
has @!CODES;
# Mapping of sub IDs to their proto code objects; used for fixing
# up in dynamic compilation.
has %!sub_id_to_code_object;
# Mapping of sub IDs to their static lexpad objects.
has %!sub_id_to_static_lexpad;
# Mapping of sub IDs to SC indexes of code stubs.
has %!sub_id_to_sc_idx;
# Array of stubs to check and the end of compilation.
has @!stub_check;
# Cached constants that we've built.
has %!const_cache;
# List of CHECK blocks to run.
has @!CHECKs;
method BUILD(*%adv) {
@!BLOCKS := [];
@!CODES := [];
@!stub_check := [];
@!CHECKs := [];
%!sub_id_to_code_object := {};
%!sub_id_to_static_lexpad := {};
%!sub_id_to_sc_idx := {};
%!const_cache := {};
}
# Creates a new lexical scope and puts it on top of the stack.
method push_lexpad($/) {
# Create pad, link to outer and add to stack.
my $pad := QAST::Block.new( QAST::Stmts.new(), :node($/) );
if +@!BLOCKS {
$pad<outer> := @!BLOCKS[+@!BLOCKS - 1];
}
@!BLOCKS[+@!BLOCKS] := $pad;
$pad
}
# Pops a lexical scope off the stack.
method pop_lexpad() {
@!BLOCKS.pop()
}
# Gets the top lexpad.
method cur_lexpad() {
@!BLOCKS[+@!BLOCKS - 1]
}
# Gets (and creates if needed) the static lexpad object for a QAST block.
method get_static_lexpad($pad) {
my $pad_id := $pad.cuid();
if nqp::existskey(%!sub_id_to_static_lexpad, $pad_id) {
return %!sub_id_to_static_lexpad{$pad_id};
}
# Create it a static lexpad object.
my $slp_type_obj := self.find_symbol(['StaticLexPad']);
my $slp := nqp::create($slp_type_obj);
nqp::bindattr($slp, $slp_type_obj, '%!static_values', nqp::hash());
nqp::bindattr($slp, $slp_type_obj, '%!flags', nqp::hash());
# Deserialization and fixup need to associate static lex pad with the
# low-level LexInfo.
self.add_object($slp);
my $fixup := QAST::Op.new(
:op('callmethod'), :name('set_static_lexpad'),
QAST::VM.new(
pir => ' .const "LexInfo" %r = "' ~ $pad.cuid() ~ '"'
),
QAST::WVal.new( :value($slp) ));
self.add_fixup_task(:deserialize_past($fixup), :fixup_past($fixup));
# Stash it under the QAST block unique ID.
%!sub_id_to_static_lexpad{$pad.cuid()} := $slp;
$slp
}
# Marks the current lexpad as being a signatured block.
method mark_cur_lexpad_signatured() {
@!BLOCKS[+@!BLOCKS - 1]<signatured> := 1;
}
# Finds the nearest signatured block and checks if it declares
# a certain symbol.
method nearest_signatured_block_declares($symbol) {
my $i := +@!BLOCKS;
while $i > 0 {
$i := $i - 1;
if @!BLOCKS[$i]<signatured> {
return +@!BLOCKS[$i].symbol($symbol);
}
}
}
# Pushes a stub on the "stubs to check" list.
method add_stub_to_check($stub) {
@!stub_check[+@!stub_check] := $stub;
}
# Checks for any stubs that weren't completed.
method assert_stubs_defined($/) {
my @incomplete;
for @!stub_check {
unless $_.HOW.is_composed($_) {
@incomplete.push($_.HOW.name($_));
}
}
if +@incomplete {
self.throw($/, 'X::Package::Stubbed', packages => @incomplete);
}
}
# Loads a setting.
method load_setting($/, $setting_name) {
# Do nothing for the NULL setting.
if $setting_name ne 'NULL' {
# Load it immediately, so the compile time info is available.
# Once it's loaded, set it as the outer context of the code
# being compiled.
my $setting := %*COMPILING<%?OPTIONS><outer_ctx>
:= Perl6::ModuleLoader.load_setting($setting_name);
# Add a fixup and deserialization task also.
my $fixup := QAST::Stmt.new(
self.perl6_module_loader_code(),
QAST::Op.new(
:op('callmethod'), :name('set_outer_ctx'),
QAST::BVal.new( :value($*UNIT_OUTER) ),
QAST::Op.new(
:op('callmethod'), :name('load_setting'),
QAST::VM.new(
pirop => 'get_hll_global Ps',
QAST::SVal.new( :value('ModuleLoader') )
),
QAST::SVal.new( :value($setting_name) )
)
)
);
self.add_load_dependency_task(:deserialize_past($fixup), :fixup_past($fixup));
return pir::getattribute__PPs($setting, 'lex_pad');
}
}
# Loads a module immediately, and also makes sure we load it
# during the deserialization.
method load_module($/, $module_name, $cur_GLOBALish) {
# Immediate loading.
my $line := HLL::Compiler.lineof($/.orig, $/.from);
my $module := Perl6::ModuleLoader.load_module($module_name, $cur_GLOBALish, :$line);
# During deserialization, ensure that we get this module loaded.
if self.is_precompilation_mode() {
self.add_load_dependency_task(:deserialize_past(QAST::Stmts.new(
self.perl6_module_loader_code(),
QAST::Op.new(
:op('callmethod'), :name('load_module'),
QAST::VM.new( pirop => 'get_hll_global Ps',
QAST::SVal.new( :value('ModuleLoader') ) ),
QAST::SVal.new( :value($module_name) ),
QAST::IVal.new(:value($line), :named('line'))
))));
}
return pir::getattribute__PPs($module, 'lex_pad');
}
# Uses the NQP module loader to load Perl6::ModuleLoader, which
# is a normal NQP module.
method perl6_module_loader_code() {
QAST::Stmt.new(
QAST::VM.new(
pirop => 'load_bytecode vs',
QAST::SVal.new( :value('ModuleLoader.pbc') )
),
QAST::Op.new(
:op('callmethod'), :name('load_module'),
QAST::Op.new(
:op('atkey'),
QAST::Op.new(
:op('atkey'),
QAST::VM.new( pirop => 'get_root_namespace P' ),
QAST::SVal.new( :value('nqp') )
),
QAST::SVal.new( :value('ModuleLoader') )
),
QAST::SVal.new( :value('Perl6::ModuleLoader') )
))
}
# Imports symbols from the specified package into the current lexical scope.
method import($/, $package, $source_package_name) {
# We'll do this in two passes, since at the start of CORE.setting we import
# StaticLexPad, which of course we need to use when importing. Since we still
# keep the authoritative copy of stuff from the compiler's view in QAST::Block's
# .symbol(...) hash we get away with this for now.
my %stash := $package.WHO;
my $target := self.cur_lexpad();
# First pass: QAST::Block symbol table installation. Also detect any
# outright conflicts, and handle any situations where we need to merge.
my %to_install;
my @clash;
for %stash {
if $target.symbol($_.key) {
# XXX TODO: Merge handling.
nqp::push(@clash, $_.key);
}
else {
$target.symbol($_.key, :scope('lexical'), :value($_.value));
$target[0].push(QAST::Var.new( :scope('lexical'), :name($_.key), :decl('var') ));
%to_install{$_.key} := $_.value;
}
}
if +@clash {
self.throw($/, 'X::Import::Redeclaration',
symbols => @clash,
source-package-name => $source_package_name,
);
}
# Second pass: stick everything we still need to install in the
# actual static lexpad.
my $slp := self.get_static_lexpad($target);
for %to_install {
$slp.add_static_value($_.key, $_.value, 0, 0);
my $categorical := match($_.key, /^ '&' (\w+) ':<' (.+) '>' $/);
if $categorical {
$/.CURSOR.add_categorical(~$categorical[0], ~$categorical[1],
~$categorical[0] ~ ':sym<' ~$categorical[1] ~ '>',
$_.key, $_.value);
}
}
1;
}
# Installs something package-y in the right place, creating the nested
# pacakges as needed.
method install_package($/, @name_orig, $scope, $pkgdecl, $package, $outer, $symbol) {
if $scope eq 'anon' { return 1 }
my @parts := nqp::clone(@name_orig);
my $name := @parts.pop();
my $create_scope := $scope;
my $cur_pkg := $package;
my $cur_lex := $outer;
# Can only install packages as our or my scope.
unless $create_scope eq 'my' || $create_scope eq 'our' {
self.throw($/, 'X::Declaration::Scope',
scope => $*SCOPE,
declaration => $pkgdecl,
);
}
# If we have a multi-part name, see if we know the opening
# chunk already. If so, use it for that part of the name.
if +@parts {
try {
$cur_pkg := $*W.find_symbol([@parts[0]]);
$cur_lex := 0;
$create_scope := 'our';
@parts.shift();
}
}
# Chase down the name, creating stub packages as needed.
while +@parts {
my $part := @parts.shift;
if nqp::existskey($cur_pkg.WHO, $part) {
$cur_pkg := ($cur_pkg.WHO){$part};
}
else {
my $new_pkg := self.pkg_create_mo($/, %*HOW<package>, :name($part));
self.pkg_compose($new_pkg);
if $create_scope eq 'my' || $cur_lex {
self.install_lexical_symbol($cur_lex, $part, $new_pkg);
}
if $create_scope eq 'our' {
self.install_package_symbol($cur_pkg, $part, $new_pkg);
}
$cur_pkg := $new_pkg;
$create_scope := 'our';
$cur_lex := 0;
}
}
# Install final part of the symbol.
if $create_scope eq 'my' || $cur_lex {
self.install_lexical_symbol($cur_lex, $name, $symbol);
}
if $create_scope eq 'our' {
if nqp::existskey($cur_pkg.WHO, $name) {
self.steal_WHO($symbol, ($cur_pkg.WHO){$name});
}
self.install_package_symbol($cur_pkg, $name, $symbol);
}
1;
}
# If we declare class A::B { }, then class A { }, then A.WHO must be the
# .WHO we already created for the stub package A.
method steal_WHO($thief, $victim) {
nqp::setwho($thief, $victim.WHO);
}
# Installs a lexical symbol. Takes a QAST::Block object, name and
# the object to install. Does an immediate installation in the
# compile-time block symbol table, and ensures that the installation
# gets fixed up at runtime too.
method install_lexical_symbol($block, $name, $obj, :$clone) {
# Install the object directly as a block symbol.
unless $block.symbol($name) {
$block[0].push(QAST::Var.new( :scope('lexical'), :name($name), :decl('var') ));
}
$block.symbol($name, :scope('lexical'), :value($obj));
# Add a clone if needed.
if $clone {
$block[0].push(QAST::Op.new(
:op('bind'),
QAST::Var.new( :name($name), :scope('lexical') ),
QAST::Op.new(
:op('callmethod'), :name('clone'),
QAST::Var.new( :name($name), :scope('lexical') )
)));
}
# Add to static lexpad.
my $slp := self.get_static_lexpad($block);
$slp.add_static_value(~$name, $obj, 0, 0);
1;
}
# Installs a lexical symbol. Takes a QAST::Block object, name and
# the type of container to install.
method install_lexical_container($block, $name, %cont_info, $descriptor, :$state) {
# Add to block, if needed. Note that it doesn't really have
# a compile time value.
my $var;
unless $block.symbol($name) {
$var := QAST::Var.new( :scope('lexical'), :name($name),
:decl('var'), :returns(%cont_info<bind_constraint>) );
$block[0].push($var);
}
$block.symbol($name, :scope('lexical'), :type(%cont_info<bind_constraint>), :descriptor($descriptor));
# If it's a native type, we're done - no container
# as we inline natives straight into registers. Do
# need to take care of initial value though.
my $prim := pir::repr_get_primitive_type_spec__IP($descriptor.of);
if $prim {
if $state { nqp::die("Natively typed state variables not yet implemented") }
if $var {
if $prim == 1 {
$block[0].push(QAST::Op.new( :op('bind'),
QAST::Var.new( :scope('lexical'), :name($name) ),
QAST::IVal.new( :value(0) ) ))
}
elsif $prim == 2 {
$block[0].push(QAST::Op.new( :op('bind'),
QAST::Var.new( :scope('lexical'), :name($name) ),
QAST::VM.new(
:pirop('set__Ns'), QAST::SVal.new( :value('NaN')
))));
}
elsif $prim == 3 {
$block[0].push(QAST::Op.new( :op('bind'),
QAST::Var.new( :scope('lexical'), :name($name) ),
QAST::SVal.new( :value('') ) ))
}
}
return 1;
}
# Build container.
my $cont := nqp::create(%cont_info<container_type>);
nqp::bindattr($cont, %cont_info<container_base>, '$!descriptor', $descriptor);
if nqp::existskey(%cont_info, 'default_value') {
nqp::bindattr($cont, %cont_info<container_base>, '$!value',
%cont_info<default_value>);
}
$block.symbol($name, :value($cont));
# Add container to static lexpad.
my $slp := self.get_static_lexpad($block);
$slp.add_static_value(~$name, $cont, 1, ($state ?? 1 !! 0));
1;
}
# Builds PAST that constructs a container.
method build_container_past(%cont_info, $descriptor) {
# Create container and set descriptor.
my $tmp := QAST::Node.unique('cont');
my $cont_code := QAST::Stmts.new(
:resultchild(0),
QAST::Op.new(
:op('bind'),
QAST::Var.new( :name($tmp), :scope('local'), :decl('var') ),
QAST::Op.new(
:op('create'),
QAST::WVal.new( :value(%cont_info<container_type>) ))),
QAST::Op.new(
:op('bindattr'),
QAST::Var.new( :name($tmp), :scope('local') ),
QAST::WVal.new( :value(%cont_info<container_base>) ),
QAST::SVal.new( :value('$!descriptor') ),
QAST::WVal.new( :value($descriptor) )));
# Default contents, if applicable (note, slurpy param as we can't
# use definedness here, as it's a type object we'd be checking).
if nqp::existskey(%cont_info, 'default_value') {
$cont_code.push(QAST::Op.new(
:op('bindattr'),
QAST::Var.new( :name($tmp), :scope('local') ),
QAST::WVal.new( :value(%cont_info<container_base>) ),
QAST::SVal.new( :value('$!value') ),
QAST::WVal.new( :value(%cont_info<default_value>) )));
}
$cont_code
}
# Hunts through scopes to find the type of a lexical.
method find_lexical_container_type($name) {
my int $i := +@!BLOCKS;
while $i > 0 {
$i := $i - 1;
my %sym := @!BLOCKS[$i].symbol($name);
if +%sym {
if nqp::existskey(%sym, 'type') {
return %sym<type>;
}
else {
$i := 0;
}
}
}
nqp::die("Could not find container descriptor for $name");
}
# Installs a symbol into the package.
method install_package_symbol($package, $name, $obj) {
($package.WHO){$name} := $obj;
1;
}
# Creates a parameter object.
method create_parameter(%param_info) {
# Create parameter object now.
my $par_type := self.find_symbol(['Parameter']);
my $parameter := nqp::create($par_type);
self.add_object($parameter);
# Calculate flags.
my int $flags := 0;
if %param_info<optional> {
$flags := $flags + $SIG_ELEM_IS_OPTIONAL;
}
if %param_info<is_invocant> {
$flags := $flags + $SIG_ELEM_INVOCANT;
}
if %param_info<is_multi_invocant> {
$flags := $flags + $SIG_ELEM_MULTI_INVOCANT;
}
if %param_info<is_rw> {
$flags := $flags + $SIG_ELEM_IS_RW;
}
if %param_info<is_copy> {
$flags := $flags + $SIG_ELEM_IS_COPY;
}
if %param_info<is_parcel> {
$flags := $flags + $SIG_ELEM_IS_PARCEL;
}
if %param_info<is_capture> {
$flags := $flags + $SIG_ELEM_IS_CAPTURE;
}
if %param_info<undefined_only> {
$flags := $flags + $SIG_ELEM_UNDEFINED_ONLY;
}
if %param_info<defined_only> {
$flags := $flags + $SIG_ELEM_DEFINED_ONLY;
}
if %param_info<pos_slurpy> {
$flags := $flags + $SIG_ELEM_SLURPY_POS;
}
if %param_info<named_slurpy> {
$flags := $flags + $SIG_ELEM_SLURPY_NAMED;
}
if %param_info<is_method_named_slurpy> {
$flags := $flags + $SIG_ELEM_METHOD_SLURPY_NAMED;
}
if %param_info<pos_lol> {
$flags := $flags + $SIG_ELEM_SLURPY_LOL;
}
if %param_info<bind_attr> {
$flags := $flags + $SIG_ELEM_BIND_PRIVATE_ATTR;
}
if %param_info<bind_accessor> {
$flags := $flags + $SIG_ELEM_BIND_PUBLIC_ATTR;
}
if %param_info<sigil> eq '@' {
$flags := $flags + $SIG_ELEM_ARRAY_SIGIL;
}
elsif %param_info<sigil> eq '%' {
$flags := $flags + $SIG_ELEM_HASH_SIGIL;
}
if %param_info<default_from_outer> {
$flags := $flags + $SIG_ELEM_DEFAULT_FROM_OUTER;
}
if %param_info<nominal_generic> {
$flags := $flags + $SIG_ELEM_NOMINAL_GENERIC;
}
if %param_info<default_is_literal> {
$flags := $flags + $SIG_ELEM_DEFAULT_IS_LITERAL;
}
my $primspec := pir::repr_get_primitive_type_spec__IP(%param_info<nominal_type>);
if $primspec == 1 {
$flags := $flags + $SIG_ELEM_NATIVE_INT_VALUE;
}
elsif $primspec == 2 {
$flags := $flags + $SIG_ELEM_NATIVE_NUM_VALUE;
}
elsif $primspec == 3 {
$flags := $flags + $SIG_ELEM_NATIVE_STR_VALUE;
}
# Populate it.
if nqp::existskey(%param_info, 'variable_name') {
nqp::bindattr_s($parameter, $par_type, '$!variable_name', %param_info<variable_name>);
}
nqp::bindattr($parameter, $par_type, '$!nominal_type', %param_info<nominal_type>);
nqp::bindattr_i($parameter, $par_type, '$!flags', $flags);
if %param_info<named_names> {
my @names := %param_info<named_names>;
nqp::bindattr($parameter, $par_type, '$!named_names', @names);
}
if %param_info<type_captures> {
my @type_names := %param_info<type_captures>;
nqp::bindattr($parameter, $par_type, '$!type_captures', @type_names);
}
if %param_info<post_constraints> {
nqp::bindattr($parameter, $par_type, '$!post_constraints',
%param_info<post_constraints>);
}
if nqp::existskey(%param_info, 'default_value') {
nqp::bindattr($parameter, $par_type, '$!default_value', %param_info<default_value>);
}
if nqp::existskey(%param_info, 'container_descriptor') {
nqp::bindattr($parameter, $par_type, '$!container_descriptor', %param_info<container_descriptor>);
}
if nqp::existskey(%param_info, 'attr_package') {
nqp::bindattr($parameter, $par_type, '$!attr_package', %param_info<attr_package>);
}
if nqp::existskey(%param_info, 'sub_signature') {
nqp::bindattr($parameter, $par_type, '$!sub_signature', %param_info<sub_signature>);
}
# Return created parameter.
$parameter
}
# Creates a signature object from a set of parameters.
method create_signature(%signature_info) {
# Create signature object now.
my $sig_type := self.find_symbol(['Signature']);
my $signature := nqp::create($sig_type);
my @parameters := %signature_info<parameters>;
self.add_object($signature);
# Set parameters.
nqp::bindattr($signature, $sig_type, '$!params', @parameters);
if nqp::existskey(%signature_info, 'returns') {
nqp::bindattr($signature, $sig_type, '$!returns', %signature_info<returns>);
}
# Return created signature.
$signature
}
method compile_time_evaluate($/, $ast) {
return $ast.compile_time_value if $ast.has_compile_time_value;
my $thunk := self.create_thunk($/, $ast);
$thunk();
}
# Turn a QAST tree into a code object, to be called immediately.
method create_thunk($/, $to_thunk) {
my $block := self.push_lexpad($/);
$block.push($to_thunk);
self.pop_lexpad();
self.create_simple_code_object($block, 'Code');
}
# Creates a simple code object with an empty signature
method create_simple_code_object($block, $type) {
self.cur_lexpad()[0].push($block);
my $sig := self.create_signature(nqp::hash('parameters', []));
return self.create_code_object($block, $type, $sig);
}
# Creates a code object of the specified type, attached the passed signature
# object and sets up dynamic compilation thunk.
method create_code_object($code_past, $type, $signature, $is_dispatcher = 0, :$yada) {
my $code := self.stub_code_object($type);
self.attach_signature($code, $signature);
self.finish_code_object($code, $code_past, $is_dispatcher, :yada($yada));
$code
}
method create_lazy($/, $code) {
my $type := self.find_symbol(['LazyScalar']);
my $container := $type.new($code);
self.add_object($container);
QAST::WVal.new( :value($container) )
}
# Stubs a code object of the specified type.
method stub_code_object($type) {
my $type_obj := self.find_symbol([$type]);
my $code := nqp::create($type_obj);
@!CODES[+@!CODES] := $code;
self.add_object($code);
$code
}
# Attaches a signature to a code object, and gives the
# signature its backlink to the code object.
method attach_signature($code, $signature) {
my $code_type := self.find_symbol(['Code']);
my $sig_type := self.find_symbol(['Signature']);
nqp::bindattr($code, $code_type, '$!signature', $signature);
nqp::bindattr($signature, $sig_type, '$!code', $code);
}
# Takes a code object and the QAST::Block for its body.
method finish_code_object($code, $code_past, $is_dispatcher = 0, :$yada) {
my $fixups := QAST::Stmts.new();
my $des := QAST::Stmts.new();
# Remove it from the code objects stack.
@!CODES.pop();
# Handle any phasers.
self.add_phasers_handling_code($code, $code_past);
# Locate various interesting symbols.
my $code_type := self.find_symbol(['Code']);
my $routine_type := self.find_symbol(['Routine']);
my $slp_type := self.find_symbol(['StaticLexPad']);
# Attach code object to QAST node.
$code_past<code_object> := $code;
# Stash it under the QAST block unique ID.
%!sub_id_to_code_object{$code_past.cuid()} := $code;
# For now, install stub that will dynamically compile the code if
# we ever try to run it during compilation.
my $precomp;
my $compiler_thunk := {
# Fix up GLOBAL.
my $rns := pir::get_root_namespace__P();
my $p6_pns := $rns{'perl6'};
$p6_pns{'GLOBAL'} := $*GLOBALish;
# Compile the block.
$precomp := self.compile_in_context($code_past, $code_type, $slp_type);
# Also compile the candidates if this is a proto.
if $is_dispatcher {
for nqp::getattr($code, $routine_type, '$!dispatchees') {
my $stub := nqp::getattr($_, $code_type, '$!do');
my $past := pir::getprop__PsP('PAST_BLOCK', $stub);
if $past {
self.compile_in_context($past, $code_type, $slp_type);
}
}
}
};
my $stub := pir::nqp_fresh_stub__PP(sub (*@pos, *%named) {
unless $precomp {
$compiler_thunk();
}
$precomp(|@pos, |%named);
});
pir::setprop__vPsP($stub, 'COMPILER_THUNK', $compiler_thunk);
pir::set__vPS($stub, $code_past.name);
nqp::bindattr($code, $code_type, '$!do', $stub);
# Tag it as a static code ref and add it to the root code refs set.
pir::setprop__vPsP($stub, 'STATIC_CODE_REF', $stub);
pir::setprop__vPsP($stub, 'COMPILER_STUB', $stub);
my $code_ref_idx := self.add_root_code_ref($stub, $code_past);
%!sub_id_to_sc_idx{$code_past.cuid()} := $code_ref_idx;
# If we clone the stub, need to mark it as a dynamic compilation
# boundary.
if self.is_precompilation_mode() {
my $clone_handler := sub ($orig, $clone) {
my $do := nqp::getattr($clone, $code_type, '$!do');
pir::setprop__vPsP($do, 'COMPILER_STUB', $do);
pir::setprop__0PsP($do, 'CLONE_CALLBACK', $clone_handler);
};
pir::setprop__0PsP($stub, 'CLONE_CALLBACK', $clone_handler);
}
# Fixup will install the real thing, unless we're in a role, in
# which case pre-comp will have sorted it out.
unless $*PKGDECL eq 'role' {
unless self.is_precompilation_mode() {
$fixups.push(QAST::Stmts.new(
self.set_attribute($code, $code_type, '$!do', QAST::BVal.new( :value($code_past) )),
QAST::VM.new(
:pirop('perl6_associate_sub_code_object vPP'),
QAST::BVal.new( :value($code_past) ),
QAST::WVal.new( :value($code) )
)));
# If we clone the stub, then we must remember to do a fixup
# of it also.
pir::setprop__0PsP($stub, 'CLONE_CALLBACK', sub ($orig, $clone) {
my $tmp := $fixups.unique('tmp_block_fixup');
self.add_object($clone);
$fixups.push(QAST::Stmt.new(
QAST::Op.new(
:op('bind'),
QAST::Var.new( :name($tmp), :scope('local'), :decl('var') ),
QAST::Op.new( :op('clone'), QAST::BVal.new( :value($code_past) ) )
),
self.set_attribute($clone, $code_type, '$!do',
QAST::Var.new( :name($tmp), :scope('local') )),
QAST::Op.new(
:op('p6assoccode'),
QAST::Var.new( :name($tmp), :scope('local') ),
QAST::WVal.new( :value($clone) )
)));
});
}
# Attach the QAST block to the stub.
pir::setprop__0PsP($stub, 'PAST_BLOCK', $code_past);
}
# If this is a dispatcher, install dispatchee list that we can
# add the candidates too.
if $is_dispatcher {
nqp::bindattr($code, $routine_type, '$!dispatchees', []);
}
# Set yada flag if needed.
if $yada {
nqp::bindattr_i($code, $routine_type, '$!yada', 1);
}
# Deserialization also needs to give the Parrot sub its backlink.
if self.is_precompilation_mode() {
$des.push(QAST::VM.new(
:pirop('perl6_associate_sub_code_object vPP'),
QAST::BVal.new( :value($code_past) ),
QAST::WVal.new( :value($code) )));
}
# If it's a routine, flag that it needs fresh magicals.
# Also store the namespace, which makes backtraces nicer.
if nqp::istype($code, $routine_type) {
self.get_static_lexpad($code_past).set_fresh_magicals();
nqp::bindattr($code, $routine_type, '$!package', $*PACKAGE);
}
self.add_fixup_task(:deserialize_past($des), :fixup_past($fixups));
$code;
}
method add_quasi_fixups($quasi_ast, $block) {
$quasi_ast := pir::nqp_decontainerize__PP($quasi_ast);
self.add_object($quasi_ast);
unless $quasi_ast.is_quasi_ast {
return "";
}
my $fixups := QAST::Op.new(:name<set_outer_ctx>, :op<callmethod>,
QAST::BVal.new(:value($block)),
QAST::Op.new(
:op<p6getouterctx>,
QAST::Var.new(
:scope<attribute>,
:name<$!quasi_context>,
QAST::WVal.new( :value($quasi_ast) ),
QAST::WVal.new( :value(self.find_symbol(['AST'])) )
)
)
);
self.add_fixup_task(:fixup_past($fixups), :deserialize_past($fixups));
}
# Adds any extra code needing for handling phasers.
method add_phasers_handling_code($code, $code_past) {
my $block_type := self.find_symbol(['Block']);
if nqp::istype($code, $block_type) {
sub run_phasers_code($type) {
QAST::Op.new(
:op('for'),
QAST::Op.new(
:op('atkey'),
QAST::Var.new(
:scope('attribute'), :name('$!phasers'),
QAST::WVal.new( :value($code) ),
QAST::WVal.new( :value($block_type) )
),
QAST::SVal.new( :value($type) )
),
QAST::Block.new(
:blocktype('immediate'),
QAST::Op.new(
:op('call'),
QAST::Var.new( :scope('lexical'), :name('$_'), :decl('param') )
)))
}
my %phasers := nqp::getattr($code, $block_type, '$!phasers');
if nqp::existskey(%phasers, 'PRE') {
$code_past[0].push(QAST::Op.new( :op('p6setpre') ));
$code_past[0].push(run_phasers_code('PRE'));
$code_past[0].push(QAST::Op.new( :op('p6clearpre') ));
}
if nqp::existskey(%phasers, 'FIRST') {
$code_past[0].push(QAST::Op.new(
:op('if'),
QAST::Op.new( :op('p6takefirstflag') ),
run_phasers_code('FIRST')));
}
if nqp::existskey(%phasers, 'ENTER') {
$code_past[0].push(run_phasers_code('ENTER'));
}
if nqp::existskey(%phasers, '!LEAVE-ORDER') || nqp::existskey(%phasers, 'POST') {
$code_past[+@($code_past) - 1] := QAST::Op.new(
:op('p6return'),
$code_past[+@($code_past) - 1]);
}
}
}
# Gives the current block what's needed for "let"/"temp" support.
method give_cur_block_let($/) {
my $block := self.cur_lexpad();
unless $block.symbol('!LET-RESTORE') {
self.setup_let_or_temp($/, '!LET-RESTORE', 'UNDO');
}
}
method give_cur_block_temp($/) {
my $block := self.cur_lexpad();
unless $block.symbol('!TEMP-RESTORE') {
self.setup_let_or_temp($/, '!TEMP-RESTORE', 'LEAVE');
}
}
method setup_let_or_temp($/, $value_stash, $phaser) {
# Add variable to current block.
my $block := self.cur_lexpad();
$block[0].push(QAST::Op.new(
:op('bind'),
QAST::Var.new( :name($value_stash), :scope('lexical'), :decl('var') ),
QAST::Op.new( :op('list') )));
$block.symbol($value_stash, :scope('lexical'));
# Create a phaser block that will do the restoration.
my $phaser_block := self.push_lexpad($/);
self.pop_lexpad();
$phaser_block.push(QAST::Op.new(
:op('while'),
QAST::Var.new( :name($value_stash), :scope('lexical') ),
QAST::Op.new(
:op('p6store'),
QAST::Op.new(
:op('shift'),
QAST::Var.new( :name($value_stash), :scope('lexical') )
),
QAST::Op.new(
:op('shift'),
QAST::Var.new( :name($value_stash), :scope('lexical') )
))));
# Add as phaser.
$block[0].push($phaser_block);
self.add_phaser($/, $phaser,
self.create_code_object($phaser_block, 'Code', self.create_signature(nqp::hash('parameters', []))));
}
# Adds a multi candidate to a proto/dispatch.
method add_dispatchee_to_proto($proto, $candidate) {
$proto.add_dispatchee($candidate);
}
# Derives a proto to get a dispatch.
method derive_dispatcher($proto) {
# Immediately do so and add to SC.
my $derived := $proto.derive_dispatcher();
self.add_object($derived);
return $derived;
}
# Creates a new container descriptor and adds it to the SC.
method create_container_descriptor($of, $rw, $name) {
my $cd_type := self.find_symbol(['ContainerDescriptor']);
my $cd := pir::perl6_create_container_descriptor__PPPis($cd_type, $of, $rw, $name);
self.add_object($cd);
$cd
}
# Helper to make PAST for setting an attribute to a value. Value should
# be a PAST tree.
method set_attribute($obj, $class, $name, $value_past) {
QAST::Op.new(
:op('bind'),
QAST::Var.new(
:name($name), :scope('attribute'),
QAST::WVal.new( :value($obj) ),
QAST::WVal.new( :value($class) )
),
$value_past
)
}
# Wraps a value in a scalar container
method scalar_wrap($obj) {
my $scalar_type := self.find_symbol(['Scalar']);
my $scalar := nqp::create($scalar_type);
self.add_object($scalar);
nqp::bindattr($scalar, $scalar_type, '$!value', $obj);
$scalar;
}
# Takes a QAST::Block and compiles it for running during "compile time".
# We need to do this for BEGIN but also for things that get called in
# the compilation process, like user defined traits.
method compile_in_context($past, $code_type, $slp_type) {
# Ensure that we have the appropriate op libs loaded and correct