/
yacc.py
955 lines (781 loc) · 24.3 KB
/
yacc.py
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
"""Parser for Promela, using Python Lex-Yacc (PLY).
References
==========
Holzmann G.J., The SPIN Model Checker,
Addison-Wesley, 2004, pp. 365--368
http://spinroot.com/spin/Man/Quick.html
"""
from __future__ import absolute_import
from __future__ import division
import logging
import os
import subprocess
import warnings
import ply.yacc
# inline
#
# import promela.ast as promela_ast
# from promela import lex
TABMODULE = 'promela.promela_parsetab'
logger = logging.getLogger(__name__)
class Parser(object):
"""Production rules for Promela parser."""
logger = logger
tabmodule = TABMODULE
start = 'program'
# http://spinroot.com/spin/Man/operators.html
# spin.y
# lowest to highest
precedence = (
('right', 'EQUALS'),
('left', 'TX2', 'RCV', 'R_RCV'),
('left', 'IMPLIES', 'EQUIV'),
('left', 'LOR'),
('left', 'LAND'),
('left', 'ALWAYS', 'EVENTUALLY'),
('left', 'UNTIL', 'WEAK_UNTIL', 'RELEASE'),
('right', 'NEXT'),
('left', 'OR'),
('left', 'XOR'),
('left', 'AND'),
('left', 'EQ', 'NE'),
('left', 'LT', 'LE', 'GT', 'GE'),
('left', 'LSHIFT', 'RSHIFT'),
('left', 'PLUS', 'MINUS'),
('left', 'TIMES', 'DIVIDE', 'MOD'),
('left', 'INCR', 'DECR'),
('right', 'LNOT', 'NOT', 'UMINUS', 'NEG'), # LNOT is also SND
('left', 'DOT'),
('left', 'LPAREN', 'RPAREN', 'LBRACKET', 'RBRACKET'))
def __init__(self, ast=None, lexer=None):
if ast is None:
import promela.ast as ast
if lexer is None:
from promela import lex
lexer = lex.Lexer()
self.lexer = lexer
self.ast = ast
self.tokens = self.lexer.tokens
self.build()
def build(self, tabmodule=None, outputdir='', write_tables=False,
debug=False, debuglog=None, errorlog=None):
"""Build parser using `ply.yacc`.
Default table module is `self.tabmodule`.
Module logger used as default debug logger.
Default error logger is that created by PLY.
"""
if tabmodule is None:
tabmodule = self.tabmodule
if debug and debuglog is None:
debuglog = self.logger
self.parser = ply.yacc.yacc(
method='LALR',
module=self,
start=self.start,
tabmodule=tabmodule,
outputdir=outputdir,
write_tables=write_tables,
debug=debug,
debuglog=debuglog,
errorlog=errorlog)
def parse(self, promela):
"""Parse string of Promela code."""
s = cpp(promela)
program = self.parser.parse(
s, lexer=self.lexer.lexer, debug=self.logger)
return program
def _iter(self, p):
if p[2] is not None:
p[1].append(p[2])
return p[1]
def _end(self, p):
if p[1] is None:
return list()
else:
return [p[1]]
# Top-level constructs
# ====================
def p_program(self, p):
"""program : units"""
p[0] = self.ast.Program(p[1])
def p_units_iter(self, p):
"""units : units unit"""
p[0] = self._iter(p)
def p_units_end(self, p):
"""units : unit"""
p[0] = self._end(p)
# TODO: events, c_fcts, ns, error
def p_unit_proc(self, p):
"""unit : proc
| init
| claim
| ltl
"""
p[0] = p[1]
def p_unit_decl(self, p):
"""unit : one_decl
| utype
"""
p[0] = p[1]
def p_unit_semi(self, p):
"""unit : semi"""
def p_proc(self, p):
("""proc : prefix_proctype NAME"""
""" LPAREN decl RPAREN"""
""" opt_priority opt_enabler"""
""" body
""")
inst = p[1]
name = p[2]
args = p[4]
priority = p[6]
enabler = p[7]
body = p[8]
p[0] = self.ast.Proctype(
name, body, args=args, priority=priority,
provided=enabler, **inst)
# instantiator
def p_inst(self, p):
"""prefix_proctype : ACTIVE opt_index proctype"""
d = p[3]
if p[2] is None:
n_active = self.ast.Integer('1')
else:
n_active = p[2]
d['active'] = n_active
p[0] = d
def p_inactive_proctype(self, p):
"""prefix_proctype : proctype"""
p[0] = p[1]
def p_opt_index(self, p):
"""opt_index : LBRACKET expr RBRACKET
| LBRACKET NAME RBRACKET
"""
p[0] = p[2]
def p_opt_index_empty(self, p):
"""opt_index : empty"""
def p_init(self, p):
"""init : INIT opt_priority body"""
p[0] = self.ast.Init(name='init', body=p[3], priority=p[2])
def p_claim(self, p):
"""claim : CLAIM optname body"""
name = p[2] if p[2] else 'never'
p[0] = self.ast.NeverClaim(name=name, body=p[3])
# user-defined type
def p_utype(self, p):
"""utype : TYPEDEF NAME LBRACE decl_lst RBRACE"""
seq = self.ast.Sequence(p[4])
p[0] = self.ast.TypeDef(p[2], seq)
def p_ltl(self, p):
"""ltl : LTL LBRACE expr RBRACE"""
p[0] = self.ast.LTL(p[3])
# Declarations
# ============
def p_decl(self, p):
"""decl : decl_lst"""
p[0] = self.ast.Sequence(p[1])
def p_decl_empty(self, p):
"""decl : empty"""
def p_decl_lst_iter(self, p):
"""decl_lst : one_decl SEMI decl_lst"""
p[0] = [p[1]] + p[3]
def p_decl_lst_end(self, p):
"""decl_lst : one_decl"""
p[0] = [p[1]]
def p_one_decl_visible(self, p):
"""one_decl : vis typename var_list
| vis NAME var_list
"""
visible = p[1]
typ = p[2]
var_list = p[3]
p[0] = self.one_decl(typ, var_list, visible)
def p_one_decl(self, p):
"""one_decl : typename var_list
| NAME var_list
"""
typ = p[1]
var_list = p[2]
p[0] = self.one_decl(typ, var_list)
def one_decl(self, typ, var_list, visible=None):
c = list()
for d in var_list:
v = self.ast.VarDef(vartype=typ, visible=visible, **d)
c.append(v)
return self.ast.Sequence(c)
# message type declaration
def p_one_decl_mtype_vis(self, p):
"""one_decl : vis MTYPE asgn LBRACE name_list RBRACE"""
p[0] = self.ast.MessageType(p[5], visible=p[1])
def p_one_decl_mtype(self, p):
"""one_decl : MTYPE asgn LBRACE name_list RBRACE"""
p[0] = self.ast.MessageType(p[3])
def p_name_list_iter(self, p):
"""name_list : name_list COMMA NAME"""
p[1].append(p[3])
p[0] = p[1]
def p_name_list_end(self, p):
"""name_list : NAME"""
p[0] = [p[1]]
def p_var_list_iter(self, p):
"""var_list : ivar COMMA var_list"""
p[0] = [p[1]] + p[3]
def p_var_list_end(self, p):
"""var_list : ivar"""
p[0] = [p[1]]
# TODO: vardcl asgn LBRACE c_list RBRACE
# ivar = initialized variable
def p_ivar(self, p):
"""ivar : vardcl"""
p[0] = p[1]
def p_ivar_asgn(self, p):
"""ivar : vardcl asgn expr"""
expr = self.ast.Expression(p[3])
p[1]['initval'] = expr
p[0] = p[1]
def p_vardcl(self, p):
"""vardcl : NAME"""
p[0] = {'name': p[1]}
# p.403, SPIN manual
def p_vardcl_unsigned(self, p):
"""vardcl : NAME COLON const"""
p[0] = {'name': p[1], 'bitwidth': p[3]}
def p_vardcl_array(self, p):
"""vardcl : NAME LBRACKET const_expr RBRACKET"""
p[0] = {'name': p[1], 'length': p[3]}
def p_vardcl_chan(self, p):
"""vardcl : vardcl EQUALS ch_init"""
p[1].update(p[3])
p[0] = p[1]
def p_typename(self, p):
"""typename : BIT
| BOOL
| BYTE
| CHAN
| INT
| PID
| SHORT
| UNSIGNED
| MTYPE
"""
p[0] = p[1]
def p_ch_init(self, p):
("""ch_init : LBRACKET const_expr RBRACKET """
""" OF LBRACE typ_list RBRACE""")
p[0] = {'length': p[2], 'msg_types': p[6]}
def p_typ_list_iter(self, p):
"""typ_list : typ_list COMMA basetype"""
p[1].append(p[3])
p[0] = p[1]
def p_typ_list_end(self, p):
"""typ_list : basetype"""
p[0] = [p[1]]
# TODO: | UNAME | error
def p_basetype(self, p):
"""basetype : typename"""
p[0] = p[1]
# References
# ==========
def p_varref(self, p):
"""varref : cmpnd"""
p[0] = p[1]
def p_cmpnd_iter(self, p):
"""cmpnd : cmpnd PERIOD cmpnd %prec DOT"""
p[0] = self.ast.VarRef(extension=p[3], **p[1])
def p_cmpnd_end(self, p):
"""cmpnd : pfld"""
p[0] = self.ast.VarRef(**p[1])
# pfld = prefix field
def p_pfld_indexed(self, p):
"""pfld : NAME LBRACKET expr RBRACKET"""
p[0] = {'name': p[1], 'index': p[3]}
def p_pfld(self, p):
"""pfld : NAME"""
p[0] = {'name': p[1]}
# Attributes
# ==========
def p_opt_priority(self, p):
"""opt_priority : PRIORITY number"""
p[0] = p[2]
def p_opt_priority_empty(self, p):
"""opt_priority : empty"""
def p_opt_enabler(self, p):
"""opt_enabler : PROVIDED LPAREN expr RPAREN"""
p[0] = p[3]
def p_opt_enabler_empty(self, p):
"""opt_enabler : empty"""
def p_body(self, p):
"""body : LBRACE sequence os RBRACE"""
p[0] = p[2]
# Sequence
# ========
def p_sequence(self, p):
"""sequence : sequence msemi step"""
p[1].append(p[3])
p[0] = p[1]
def p_sequence_ending_with_atomic(self, p):
"""sequence : seq_block step"""
p[1].append(p[2])
p[0] = p[1]
def p_sequence_single(self, p):
"""sequence : step"""
p[0] = self.ast.Sequence([p[1]])
def p_seq_block(self, p):
"""seq_block : sequence msemi atomic
| sequence msemi dstep
"""
p[1].append(p[3])
p[0] = p[1]
def p_seq_block_iter(self, p):
"""seq_block : seq_block atomic
| seq_block dstep
"""
p[1].append(p[2])
p[0] = p[1]
def p_seq_block_single(self, p):
"""seq_block : atomic
| dstep
"""
p[0] = [p[1]]
# TODO: XU vref_lst
def p_step_1(self, p):
"""step : one_decl
| stmnt
"""
p[0] = p[1]
def p_step_labeled(self, p):
"""step : NAME COLON one_decl"""
raise Exception(
'label preceding declaration: {s}'.format(s=p[3]))
def p_step_3(self, p):
"""step : NAME COLON XR
| NAME COLON XS
"""
raise Exception(
'label preceding xr/xs claim')
def p_step_4(self, p):
"""step : stmnt UNLESS stmnt"""
p[0] = (p[1], 'unless', p[3])
self.logger.warning('UNLESS not interpreted yet')
# Statement
# =========
def p_stmnt(self, p):
"""stmnt : special
| statement
"""
p[0] = p[1]
# Stmnt in spin.y
def p_statement_asgn(self, p):
"""statement : varref asgn full_expr"""
p[0] = self.ast.Assignment(var=p[1], value=p[3])
def p_statement_incr(self, p):
"""statement : varref INCR"""
one = self.ast.Integer('1')
expr = self.ast.Expression(self.ast.Binary('+', p[1], one))
p[0] = self.ast.Assignment(p[1], expr)
def p_statement_decr(self, p):
"""statement : varref DECR"""
one = self.ast.Integer('1')
expr = self.ast.Expression(self.ast.Binary('-', p[1], one))
p[0] = self.ast.Assignment(p[1], expr)
def p_statement_assert(self, p):
"""statement : ASSERT full_expr"""
p[0] = self.ast.Assert(p[2])
def p_statement_fifo_receive(self, p):
"""statement : varref RCV rargs"""
p[0] = self.ast.Receive(p[1], p[3])
def p_statement_copy_fifo_receive(self, p):
"""statement : varref RCV LT rargs GT"""
p[0] = self.ast.Receive(p[1], p[4])
def p_statement_random_receive(self, p):
"""statement : varref R_RCV rargs"""
p[0] = self.ast.Receive(p[1], p[3])
def p_statement_copy_random_receive(self, p):
"""statement : varref R_RCV LT rargs GT"""
p[0] = self.ast.Receive(p[1], p[4])
def p_statement_tx2(self, p):
"""statement : varref TX2 margs"""
p[0] = self.ast.Send(p[1], p[3])
def p_statement_full_expr(self, p):
"""statement : full_expr"""
p[0] = p[1]
def p_statement_else(self, p):
"""statement : ELSE"""
p[0] = self.ast.Else()
def p_statement_atomic(self, p):
"""statement : atomic"""
p[0] = p[1]
def p_atomic(self, p):
"""atomic : ATOMIC LBRACE sequence os RBRACE"""
s = p[3]
s.context = 'atomic'
p[0] = s
def p_statement_dstep(self, p):
"""statement : dstep"""
p[0] = p[1]
def p_dstep(self, p):
"""dstep : D_STEP LBRACE sequence os RBRACE"""
s = p[3]
s.context = 'd_step'
p[0] = s
def p_statement_braces(self, p):
"""statement : LBRACE sequence os RBRACE"""
p[0] = p[2]
# the stmt of line 696 in spin.y collects the inline ?
def p_statement_call(self, p):
"""statement : NAME LPAREN args RPAREN"""
# NAME = INAME = inline
c = self.ast.Inline(p[1], p[3])
p[0] = self.ast.Sequence([c])
def p_statement_assgn_call(self, p):
"""statement : varref asgn NAME LPAREN args RPAREN statement"""
inline = self.ast.Inline(p[3], p[5])
p[0] = self.ast.Assignment(p[1], inline)
def p_statement_return(self, p):
"""statement : RETURN full_expr"""
p[0] = self.ast.Return(p[2])
def p_printf(self, p):
"""statement : PRINT LPAREN STRING prargs RPAREN"""
p[0] = self.ast.Printf(p[3], p[4])
# yet unimplemented for statement:
# SET_P l_par two_args r_par
# PRINTM l_par varref r_par
# PRINTM l_par CONST r_par
# ccode
# Special
# =======
def p_special(self, p):
"""special : varref RCV"""
p[0] = self.ast.Receive(p[1])
def p_varref_lnot(self, p):
"""special : varref LNOT margs"""
raise NotImplementedError
def p_break(self, p):
"""special : BREAK"""
p[0] = self.ast.Break()
def p_goto(self, p):
"""special : GOTO NAME"""
p[0] = self.ast.Goto(p[2])
def p_labeled_stmt(self, p):
"""special : NAME COLON stmnt"""
p[0] = self.ast.Label(p[1], p[3])
def p_labeled(self, p):
"""special : NAME COLON"""
p[0] = self.ast.Label(
p[1],
self.ast.Expression(self.ast.Bool('true')))
def p_special_if(self, p):
"""special : IF options FI"""
p[0] = self.ast.Options('if', p[2])
def p_special_do(self, p):
"""special : DO options OD"""
p[0] = self.ast.Options('do', p[2])
def p_options_end(self, p):
"""options : option"""
p[0] = [p[1]]
def p_options_iter(self, p):
"""options : options option"""
p[1].append(p[2])
p[0] = p[1]
def p_option(self, p):
"""option : COLONS sequence os"""
s = p[2]
s.is_option = True
p[0] = s
# Expressions
# ===========
def p_full_expr(self, p):
"""full_expr : expr
| pexpr
"""
p[0] = self.ast.Expression(p[1])
# probe expr = no negation allowed (positive)
def p_pexpr(self, p):
"""pexpr : probe
| LPAREN pexpr RPAREN
| pexpr LAND pexpr
| pexpr LAND expr
| expr LAND pexpr
| pexpr LOR pexpr
| pexpr LOR expr
| expr LOR pexpr
"""
p[0] = 'pexpr'
def p_probe(self, p):
"""probe : FULL LPAREN varref RPAREN
| NFULL LPAREN varref RPAREN
| EMPTY LPAREN varref RPAREN
| NEMPTY LPAREN varref RPAREN
"""
p[0] = 'probe'
def p_expr_paren(self, p):
"""expr : LPAREN expr RPAREN"""
p[0] = p[2]
def p_expr_arithmetic(self, p):
"""expr : expr PLUS expr
| expr MINUS expr
| expr TIMES expr
| expr DIVIDE expr
| expr MOD expr
"""
p[0] = self.ast.Binary(p[2], p[1], p[3])
def p_expr_not(self, p):
"""expr : NOT expr
| MINUS expr %prec UMINUS
| LNOT expr %prec NEG
"""
p[0] = self.ast.Unary(p[1], p[2])
def p_expr_logical(self, p):
"""expr : expr AND expr
| expr OR expr
| expr XOR expr
| expr LAND expr
| expr LOR expr
"""
p[0] = self.ast.Binary(p[2], p[1], p[3])
# TODO: cexpr
def p_expr_shift(self, p):
"""expr : expr LSHIFT expr
| expr RSHIFT expr
"""
p[0] = p[1]
def p_expr_const_varref(self, p):
"""expr : const
| varref
"""
p[0] = p[1]
def p_expr_varref(self, p):
"""expr : varref RCV LBRACKET rargs RBRACKET
| varref R_RCV LBRACKET rargs RBRACKET
"""
p[0] = p[1]
warnings.warn('not implemented')
def p_expr_other(self, p):
"""expr : LPAREN expr ARROW expr COLON expr RPAREN
| LEN LPAREN varref RPAREN
| ENABLED LPAREN expr RPAREN
| GET_P LPAREN expr RPAREN
"""
p[0] = p[1]
warnings.warn('"{s}" not implemented'.format(s=p[1]))
def p_expr_run(self, p):
"""expr : RUN aname LPAREN args RPAREN opt_priority"""
p[0] = self.ast.Run(p[2], p[4], p[6])
def p_expr_other_2(self, p):
"""expr : TIMEOUT
| NONPROGRESS
| PC_VAL LPAREN expr RPAREN
"""
raise NotImplementedError()
def p_expr_remote_ref_proctype_pc(self, p):
"""expr : NAME AT NAME
"""
p[0] = self.ast.RemoteRef(p[1], p[3])
def p_expr_remote_ref_pid_pc(self, p):
"""expr : NAME LBRACKET expr RBRACKET AT NAME"""
p[0] = self.ast.RemoteRef(p[1], p[6], pid=p[3])
def p_expr_remote_ref_var(self, p):
"""expr : NAME LBRACKET expr RBRACKET COLON pfld"""
# | NAME COLON pfld %prec DOT2
raise NotImplementedError()
def p_expr_comparator(self, p):
"""expr : expr EQ expr
| expr NE expr
| expr LT expr
| expr LE expr
| expr GT expr
| expr GE expr
"""
p[0] = self.ast.Binary(p[2], p[1], p[3])
def p_binary_ltl_expr(self, p):
"""expr : expr UNTIL expr
| expr WEAK_UNTIL expr
| expr RELEASE expr
| expr IMPLIES expr
| expr EQUIV expr
"""
p[0] = self.ast.Binary(p[2], p[1], p[3])
def p_unary_ltl_expr(self, p):
"""expr : NEXT expr
| ALWAYS expr
| EVENTUALLY expr
"""
p[0] = self.ast.Unary(p[1], p[2])
# Constants
# =========
def p_const_expr_const(self, p):
"""const_expr : const"""
p[0] = p[1]
def p_const_expr_unary(self, p):
"""const_expr : MINUS const_expr %prec UMINUS"""
p[0] = self.ast.Unary(p[1], p[2])
def p_const_expr_binary(self, p):
"""const_expr : const_expr PLUS const_expr
| const_expr MINUS const_expr
| const_expr TIMES const_expr
| const_expr DIVIDE const_expr
| const_expr MOD const_expr
"""
p[0] = self.ast.Binary(p[2], p[1], p[3])
def p_const_expr_paren(self, p):
"""const_expr : LPAREN const_expr RPAREN"""
p[0] = p[2]
def p_const(self, p):
"""const : boolean
| number
"""
# lex maps `skip` to `TRUE`
p[0] = p[1]
def p_bool(self, p):
"""boolean : TRUE
| FALSE
"""
p[0] = self.ast.Bool(p[1])
def p_number(self, p):
"""number : INTEGER"""
p[0] = self.ast.Integer(p[1])
# Auxiliary
# =========
def p_two_args(self, p):
"""two_args : expr COMMA expr"""
def p_args(self, p):
"""args : arg"""
p[0] = p[1]
def p_prargs(self, p):
"""prargs : COMMA arg"""
p[0] = p[2]
def p_prargs_empty(self, p):
"""prargs : empty"""
def p_args_empty(self, p):
"""args : empty"""
def p_margs(self, p):
"""margs : arg
| expr LPAREN arg RPAREN
"""
def p_arg(self, p):
"""arg : expr
| expr COMMA arg
"""
p[0] = 'arg'
# TODO: CONST, MINUS CONST %prec UMIN
def p_rarg(self, p):
"""rarg : varref
| EVAL LPAREN expr RPAREN
"""
p[0] = 'rarg'
def p_rargs(self, p):
"""rargs : rarg
| rarg COMMA rargs
| rarg LPAREN rargs RPAREN
| LPAREN rargs RPAREN
"""
def p_proctype(self, p):
"""proctype : PROCTYPE
| D_PROCTYPE
"""
if p[1] == 'proctype':
p[0] = dict(d_proc=False)
else:
p[0] = dict(d_proc=True)
# PNAME
def p_aname(self, p):
"""aname : NAME"""
p[0] = p[1]
# optional name
def p_optname(self, p):
"""optname : NAME"""
p[0] = p[1]
def p_optname_empty(self, p):
"""optname : empty"""
# optional semi
def p_os(self, p):
"""os : empty
| semi
"""
p[0] = ';'
# multi-semi
def p_msemi(self, p):
"""msemi : semi
| msemi semi
"""
p[0] = ';'
def p_semi(self, p):
"""semi : SEMI
| ARROW
"""
p[0] = ';'
def p_asgn(self, p):
"""asgn : EQUALS
| empty
"""
p[0] = None
def p_visible(self, p):
"""vis : HIDDEN
| SHOW
| ISLOCAL
"""
p[0] = {'visible': p[1]}
def p_empty(self, p):
"""empty : """
def p_error(self, p):
raise Exception('syntax error at: {p}'.format(p=p))
def cpp(s):
"""Call the C{C} preprocessor with input C{s}."""
try:
p = subprocess.Popen(['cpp', '-E', '-x', 'c'],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
universal_newlines=True)
except OSError as e:
if e.errno == os.errno.ENOENT:
raise Exception('C preprocessor (cpp) not found in path.')
else:
raise
logger.debug('cpp input:\n' + s)
stdout, stderr = p.communicate(s)
logger.debug('cpp returned: {c}'.format(c=p.returncode))
logger.debug('cpp stdout:\n {out}'.format(out=stdout))
return stdout
def rebuild_table(parser, tabmodule):
# log details to file
h = logging.FileHandler('log.txt', mode='w')
debuglog = logging.getLogger()
debuglog.addHandler(h)
debuglog.setLevel('DEBUG')
import os
outputdir = './'
# rm table files to force rebuild to get debug output
tablepy = tabmodule + '.py'
tablepyc = tabmodule + '.pyc'
try:
os.remove(tablepy)
except:
print('no "{t}" found'.format(t=tablepy))
try:
os.remove(tablepyc)
except:
print('no "{t}" found'.format(t=tablepyc))
parser.build(tabmodule, outputdir=outputdir,
write_tables=True, debug=True,
debuglog=debuglog)
if __name__ == '__main__':
rebuild_table(Parser(), TABMODULE.split('.')[-1])
# TODO
#
# expr << expr
# expr >> expr
# (expr -> expr : expr)
# run func(args) priority
# len(varref)
# enabled(expr)
# get_p(expr)
# var ? [rargs]
# var ?? [rargs]
# timeout
# nonprogress
# pc_val(expr)
# name[expr] @ name
# name[expr] : pfld
# name @ name
# name : pfld