-
-
Notifications
You must be signed in to change notification settings - Fork 373
/
Actions.pm
5977 lines (5461 loc) · 220 KB
/
Actions.pm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
use NQPP6QRegex;
use NQPP5QRegex;
use Perl6::Pod;
use Perl6::ConstantFolder;
use Perl6::Ops;
use QRegex;
use QAST;
role STDActions {
method quibble($/) {
make $<nibble>.ast;
}
}
class Perl6::Actions is HLL::Actions does STDActions {
our @MAX_PERL_VERSION;
our $FORBID_PIR;
our $STATEMENT_PRINT;
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;
$FORBID_PIR := 0;
$STATEMENT_PRINT := 0;
}
sub p6box_s($s) {
nqp::box_s($s, $*W.find_symbol(['Str']));
}
method ints_to_string($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));
}
}
# 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 $shape_ast.isa(QAST::Stmts) && +@($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> := $*W.find_symbol(['Any']);
}
}
%info
}
method deflongname($/) {
if $<colonpair> {
my $name := ~$<name>;
if $<colonpair>[0] {
$name := $name ~ ':';
}
if $<colonpair>[0]<identifier> {
$name := $name ~ ~$<colonpair>[0]<identifier>;
}
if $<colonpair>[0]<circumfix><nibble> -> $op_name {
$name := $name ~ '<' ~ $*W.colonpair_nibble_to_str($/, $op_name) ~ '>';
}
make $name;
}
else {
make $*W.disect_deflongname($/).name(
:dba("$*IN_DECL declaration"),
:decl<routine>,
);
}
}
# Turn $code into "for lines() { $code }"
sub wrap_option_n_code($/, $code) {
$code := make_topic_block_ref($code, copy => 1);
return QAST::Op.new(
:op<call>, :name<&eager>,
QAST::Op.new(:op<callmethod>, :name<map>,
QAST::Op.new( :op<call>, :name<&flat>,
QAST::Op.new(
:op<call>, :name<&flat>,
QAST::Op.new(
:name<&lines>,
:op<call>
)
)
),
$code
)
);
}
# Turn $code into "for lines() { $code; say $_ }"
# &wrap_option_n_code already does the C<for> loop, so we just add the
# C<say> call here
sub wrap_option_p_code($/, $code) {
return wrap_option_n_code($/,
QAST::Stmts.new(
$code,
QAST::Op.new(:name<&say>, :op<call>,
QAST::Var.new(:name<$_>)
)
)
);
}
method comp_unit($/) {
# Finish up code object for the mainline.
if $*DECLARAND {
$*W.attach_signature($*DECLARAND, $*W.create_signature(nqp::hash('parameters', [])));
$*W.finish_code_object($*DECLARAND, $*UNIT);
}
# Checks.
$*W.assert_stubs_defined($/);
# Get the block for the unit mainline code.
my $unit := $*UNIT;
my $mainline := QAST::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);
}
# 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 $global_install := QAST::VM.new(
pirop => 'set_hll_global vsP',
QAST::SVal.new( :value('GLOBAL') ),
QAST::WVal.new( :value($*GLOBALish) )
);
$*W.add_fixup_task(:deserialize_past($global_install), :fixup_past($global_install));
# 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;
$outer.node($/);
# 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 ));
# 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()),
# 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.
$outer
);
# Pass some extra bits along to the optimizer.
$compunit<UNIT> := $unit;
$compunit<GLOBALish> := $*GLOBALish;
$compunit<W> := $*W;
make $compunit;
}
# XXX Move to HLL::Actions after NQP gets QAST.
method CTXSAVE() {
QAST::Stmt.new(
QAST::Op.new(
:op('bind'),
QAST::Var.new( :name('ctxsave'), :scope('local'), :decl('var') ),
QAST::Var.new( :name('$*CTXSAVE'), :scope('contextual') )
),
QAST::Op.new(
:op('unless'),
QAST::Op.new(
:op('isnull'),
QAST::Var.new( :name('ctxsave'), :scope('local') )
),
QAST::Op.new(
:op('if'),
QAST::VM.new(
:pirop('can IPs'),
QAST::Var.new( :name('ctxsave'), :scope('local') ),
QAST::SVal.new( :value('ctxsave') )
),
QAST::Op.new(
:op('callmethod'), :name('ctxsave'),
QAST::Var.new( :name('ctxsave'), :scope('local')
)))))
}
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 $pod2text := QAST::Op.new(
:op<callmethod>, :name<render>, :node($/),
self.make_indirect_lookup([$renderer]),
QAST::Var.new(:name<$=pod>, :scope('lexical'), :node($/))
);
$block.push(
QAST::Op.new(
:op<call>, :node($/),
:name('&say'), $pod2text,
),
);
# TODO: We should print out $?USAGE too,
# once it's known at compile time
$block.push(
QAST::Op.new(
:op<call>, :node($/),
: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 $<pod_block>.ast;
}
method pod_configuration($/) {
make Perl6::Pod::make_config($/);
}
method pod_block:sym<delimited>($/) {
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 $past := QAST::Stmts.new( :node($/) );
if $<statement> {
for $<statement> {
my $ast := $_.ast;
if $ast {
if $ast<sink_past> {
$ast := QAST::Want.new($ast, 'v', $ast<sink_past>);
}
elsif $ast<bare_block> {
$ast := $ast<bare_block>;
}
else {
$ast := QAST::Stmt.new($ast, :returns($ast.returns)) if $ast ~~ QAST::Node;
}
$past.push( $ast );
}
}
}
if +$past.list < 1 {
$past.push(QAST::Var.new(:name('Nil'), :scope('lexical')));
}
else {
$past.returns($past[+@($past) - 1].returns);
}
make $past;
}
method semilist($/) {
my $past := QAST::Stmts.new( :node($/) );
if $<statement> {
for $<statement> { $past.push($_.ast) if $_.ast; }
}
unless +@($past) {
$past.push( QAST::Op.new( :op('call'), :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(QAST::Var.new(:name('Nil'), :scope('lexical')));
$past := $mc.ast;
}
if $ml {
my $cond := $ml<smexpr>.ast;
if ~$ml<sym> eq 'given' {
$past := QAST::Op.new(
:op('call'),
make_topic_block_ref($past),
$cond
);
}
elsif ~$ml<sym> eq 'for' {
unless $past<past_block> {
$past := make_topic_block_ref($past);
}
$past := QAST::Op.new(
:op<call>, :name<&eager>, :node($/),
QAST::Op.new(
:op<callmethod>, :name<map>, :node($/),
QAST::Op.new(:op('call'), :name('&infix:<,>'), $cond),
block_closure($past)
));
}
else {
$past := QAST::Op.new($cond, $past, :op(~$ml<sym>), :node($/) );
}
}
}
elsif $<statement_control> { $past := $<statement_control>.ast; }
else { $past := 0; }
if $STATEMENT_PRINT && $past {
$past := QAST::Stmts.new(:node($/),
QAST::Op.new(
:op<say>,
QAST::SVal.new(:value(~$/))
),
$past
);
}
make $past;
}
method xblock($/) {
make QAST::Op.new( $<EXPR>.ast, $<pblock>.ast, :op('if'), :node($/) );
}
method pblock($/) {
if $<blockoid><you_are_here> {
make $<blockoid>.ast;
}
else {
# Locate or build a set of parameters.
my %sig_info;
my @params;
my $block := $<blockoid>.ast;
if $block<placeholder_sig> && $<signature> {
$*W.throw($/, ['X', 'Signature', 'Placeholder'],
placeholder => $block<placeholder_sig>[0]<placeholder>,
);
}
elsif $block<placeholder_sig> {
@params := $block<placeholder_sig>;
%sig_info<parameters> := @params;
}
elsif $<signature> {
%sig_info := $<signature>.ast;
@params := %sig_info<parameters>;
}
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, '$_');
}
%sig_info<parameters> := @params;
}
# 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>, %sig_info, $block);
add_signature_binding_code($block, $signature, @params);
# Add a slot for a $*DISPATCHER, and a call to take one.
add_implicit_var($block, '$*DISPATCHER');
$block[0].unshift(QAST::Op.new(:op('p6takedisp')));
# We'll install PAST in current block so it gets capture_lex'd.
# Then evaluate to a reference to the block (non-closure - higher
# up stuff does that if it wants to).
($*W.cur_lexpad())[0].push(my $uninst := QAST::Stmts.new($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 $uninst := QAST::Stmts.new($block));
$*W.attach_signature($*DECLARAND, $*W.create_signature(nqp::hash('parameters', [])));
$*W.finish_code_object($*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;
if %*HANDLERS {
$past := QAST::Op.new( :op('handle'), $past );
for %*HANDLERS {
$past.push($_.key);
$past.push($_.value);
}
}
my $BLOCK := $*CURPAD;
$BLOCK.push($past);
$BLOCK.node($/);
$BLOCK<statementlist> := $<statementlist>.ast;
$BLOCK<handlers> := %*HANDLERS if %*HANDLERS;
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 )
!! QAST::Var.new(:name('Nil'), :scope('lexical'))
);
# 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.op('unless');
make $past;
}
method statement_control:sym<while>($/) {
my $past := xblock_immediate( $<xblock>.ast );
$past.op(~$<sym>);
make $past;
}
method statement_control:sym<repeat>($/) {
my $op := 'repeat_' ~ ~$<wu>;
my $past;
if $<xblock> {
$past := xblock_immediate( $<xblock>.ast );
$past.op($op);
}
else {
$past := QAST::Op.new( $<EXPR>.ast, pblock_immediate( $<pblock>.ast ),
:op($op), :node($/) );
}
make $past;
}
method statement_control:sym<for>($/) {
my $xblock := $<xblock>.ast;
my $past := QAST::Op.new(
:op<callmethod>, :name<map>, :node($/),
QAST::Op.new(:name('&infix:<,>'), :op('call'), $xblock[0]),
block_closure($xblock[1])
);
$past := QAST::Op.new( :name<&eager>, :op<call>, $past, :node($/) );
make $past;
}
method statement_control:sym<loop>($/) {
my $block := pblock_immediate($<block>.ast);
my $cond := $<e2> ?? $<e2>[0].ast !! QAST::Var.new(:name<True>, :scope<lexical>);
my $loop := QAST::Op.new( $cond, :op('while'), :node($/) );
$loop.push($block);
if $<e3> {
$loop.push($<e3>[0].ast);
}
if $<e1> {
$loop := QAST::Stmts.new( $<e1>[0].ast, $loop, :node($/) );
}
make $loop;
}
method statement_control:sym<need>($/) {
my $past := QAST::Var.new( :name('Nil'), :scope('lexical') );
for $<version> {
# XXX TODO: Version checks.
}
make $past;
}
method statement_control:sym<import>($/) {
my $past := QAST::Var.new( :name('Nil'), :scope('lexical') );
make $past;
}
method statement_control:sym<use>($/) {
my $past := QAST::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 $*SCOPE := 'my';
declare_variable($/, QAST::Stmts.new(), '$', '*', 'FATAL', []);
$past := QAST::Op.new(
:op('p6store'), :node($/),
QAST::Var.new( :name('$*FATAL'), :scope('lexical') ),
QAST::Op.new( :op('p6bool'), QAST::IVal.new( :value(1) ) )
);
}
elsif ~$<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 $past := QAST::Stmts.new(:node($/));
my $name_past := $<module_name>
?? QAST::SVal.new(:value($<module_name><longname><name>.Str))
!! $<EXPR>[0].ast;
$past.push(QAST::Op.new(
:op('callmethod'), :name('load_module'),
QAST::VM.new( pirop => 'get_hll_global Ps',
QAST::SVal.new( :value('ModuleLoader') ) ),
$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 $import_past := QAST::Op.new(:node($/), :op<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);
}
$past.push(QAST::Var.new( :name('Nil'), :scope('lexical') ));
make $past;
}
method statement_control:sym<given>($/) {
my $past := $<xblock>.ast;
$past.push($past.shift); # swap [0] and [1] elements
$past.op('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 := QAST::Op.new( :op('callmethod'), :name('ACCEPTS'),
$sm_exp,
QAST::Var.new( :name('$_'), :scope('lexical') )
);
# 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 QAST::Op.new( :op('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 nqp::existskey(%*HANDLERS, 'CATCH') {
$*W.throw($/, ['X', 'Phaser', 'Multiple'], block => 'CATCH');
}
my $block := $<block>.ast;
set_block_handler($/, $block, 'CATCH');
make QAST::Var.new( :name('Nil'), :scope('lexical') );
}
method statement_control:sym<CONTROL>($/) {
if nqp::existskey(%*HANDLERS, 'CONTROL') {
$*W.throw($/, ['X', 'Phaser', 'Multiple'], block => 'CONTROL');
}
my $block := $<block>.ast;
set_block_handler($/, $block, 'CONTROL');
make QAST::Var.new( :name('Nil'), :scope('lexical') );
}
method statement_prefix:sym<BEGIN>($/) { 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<DOC>($/) {
$*W.add_phaser($/, ~$<phase>, ($<blorst>.ast)<code_object>)
if %*COMPILING<%?OPTIONS><doc>;
}
method statement_prefix:sym<do>($/) {
make QAST::Op.new( :op('call'), $<blorst>.ast );
}
method statement_prefix:sym<gather>($/) {
my $past := block_closure($<blorst>.ast);
make QAST::Op.new( :op('call'), :name('&GATHER'), $past );
}
method statement_prefix:sym<sink>($/) {
my $blast := QAST::Op.new( :op('call'), $<blorst>.ast );
make QAST::Stmts.new(
QAST::Op.new( :name('&eager'), :op('call'), $blast ),
QAST::Var.new( :name('Nil'), :scope('lexical')),
:node($/)
);
}
method statement_prefix:sym<try>($/) {
my $block := $<blorst>.ast;
my $past;
if $block<past_block><handlers> && $block<past_block><handlers><CATCH> {
# we already have a CATCH block, nothing to do here
$past := QAST::Op.new( :op('call'), $block );
} else {
$block := QAST::Op.new(:op<call>, $block); # XXX should be immediate
$past := QAST::Op.new(
:op('handle'),
# Success path puts Any into $! and evaluates to the block.