-
Notifications
You must be signed in to change notification settings - Fork 1
/
basic-base.peg
595 lines (529 loc) · 34.4 KB
/
basic-base.peg
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
#
# Basic Parser - TurboBasic XL compatible parsing and transformation tool.
# Copyright (C) 2015 Daniel Serpell
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>
#
# Full program
Program = UnicodeBOM? # Optional Unicode BOM
ProgramLine* # Zero or more lines
EndOfFile # End of file
# One program line, can be:
ProgramLine = !EndOfFile SPC
( EndOfLine # An empty line
| '$' SPC DirectiveLine # A parser directive
| ':' SPC StatementLine EndOfLine # A line with statements after a ':'
| LineNumber EndOfLine # A line-number alone
| LineNumber SPC StatementLine EndOfLine # A line-number and statements
| StatementLine EndOfLine # Only statements
| < ERROR > EndOfLine { print_error("input line", yytext); }
)
# One statement line, with multiple statements separated by ':'
StatementLine = Statement ( ':' SPC Statement
| <':'> SPC { print_error("statement", yytext); }
| < ERROR > { print_error("end of line/statement", yytext); }
)*
# One statement
Statement =
# Start with comments, *except* REM, as we try to support variable
# names starting with "rem".
t:RemExpr1 { add_stmt(STMT_REM,t); }
| t:RemExpr2 { add_stmt(STMT_REM_,t); }
# Special case: TIME$= is a statement, but has an '=' sign, so must
# test before testing variables.
| TIME_S t:StrExprErr { add_stmt(STMT_TIME_S,t); }
# Allows a space after TIME$, this makes parser less confusing.
| &{ testToken( 1, TOK_TIMEP ) } SPC '=' SPC t:StrExprErr
{ add_stmt(STMT_TIME_S,t); }
# Test variable assignment, this fails (and goes to the rest of
# statements if there is no '=' sign after the variable name.
| t:LetExprStr !THEN { add_stmt(STMT_LET_INV,t); }
| t:LetExprNum !THEN !FOR_TO { add_stmt(STMT_LET_INV,t); }
# Standard REM comments
| t:RemExpr3 { add_stmt(STMT_REM,t); }
# Follows the standard statements, listed here in alphabetical order
| BYE { add_stmt(STMT_BYE,0); }
| BPUT t:IONumExpr2 { add_stmt(STMT_BPUT,t); }
| BGET t:IONumExpr2 { add_stmt(STMT_BGET,t); }
| BLOAD t:StrExprErr { add_stmt(STMT_BLOAD,t); }
| BRUN t:StrExprErr { add_stmt(STMT_BRUN,t); }
| COLOR t:NumExprErr { add_stmt(STMT_COLOR,t); }
| CONT { add_stmt(STMT_CONT,0); }
| COM t:DimVarList { add_stmt(STMT_COM,t); }
| CLOSE t:IOChanErr { add_stmt(STMT_CLOSE,t); }
| CLOSE &{ parsingTurbo() } { add_stmt(STMT_CLOSE,0); }
| CLR { add_stmt(STMT_CLR,0); }
| CLS {t=0;} t:IOChanErr? { add_stmt(STMT_CLS,t); }
| CLOAD { add_stmt(STMT_CLOAD,0); }
| CIRCLE t:CircleExpr { add_stmt(STMT_CIRCLE,t); }
| CSAVE { add_stmt(STMT_CSAVE,0); }
| DATA < NotEOL* > { add_stmt(STMT_DATA,add_data_stmt(yytext, yyleng)); add_force_line(); }
| DEG { add_stmt(STMT_DEG,0); }
| DIM t:DimVarList { add_stmt(STMT_DIM,t); }
| DOS { add_stmt(STMT_DOS,0); }
| DRAWTO t:NumExpr2 { add_stmt(STMT_DRAWTO,t); }
| DPOKE t:NumExpr2 { add_stmt(STMT_DPOKE,t); }
| DO { add_stmt(STMT_DO,0); }
| DIR {t=0;} t:StrExprErr? { add_stmt(STMT_DIR,t); }
| DELETE t:StrExprErr { add_stmt(STMT_DELETE,t); }
| DEL t:NumExpr2 { add_stmt(STMT_DEL,t); }
| DUMP {t=0;} t:StrExprErr? { add_stmt(STMT_DUMP,t); }
| DSOUND {t=0;} t:NumExpr4? { add_stmt(STMT_DSOUND,t); }
| ENTER t:StrExprErr { add_stmt(STMT_ENTER,t); }
| ELSE { add_stmt(STMT_ELSE,0); }
| ENDIF (
# In turbo mode, it is already an statement:
&{ parsingTurbo() } { add_stmt(STMT_ENDIF,0); }
| # In Atari BASIC mode, is the end of line after the IF/THEN:
&{ !parsingTurbo() } { add_stmt(STMT_ENDIF_INVISIBLE,0); add_force_line(); }
)
| EXIT {t=0;} t:NumExprErr? { add_stmt(STMT_EXIT,t); }
| EXEC t:LabelExecParList { add_stmt(STMT_EXEC_PAR,t); }
| EXEC t:Label { add_stmt(STMT_EXEC,t); }
| ENDPROC { add_stmt(STMT_ENDPROC,0); }
| END { add_stmt(STMT_END,0); }
| FOR t:ForStmtExpr { add_stmt(STMT_FOR,t); }
| FILLTO t:NumExpr2 { add_stmt(STMT_FILLTO,t); }
| FCOLOR t:NumExprErr { add_stmt(STMT_FCOLOR,t); }
| GOTO t:NumExprErr { add_stmt(STMT_GOTO,t); }
| GO_TO t:NumExprErr { add_stmt(STMT_GO_TO,t); }
| GOSUB t:NumExprErr { add_stmt(STMT_GOSUB,t); }
| GET t:GetExpr { add_stmt(STMT_GET,t); }
| GRAPHICS t:NumExprErr { add_stmt(STMT_GRAPHICS,t); }
| GO_S t:Label { add_stmt(STMT_GO_S,t); }
| INPUT t:InputExpr { add_stmt(STMT_INPUT,t); }
# We split the IF into three cases:
# 1- IF/THEN followed by a number, forcing a line-break.
| IF t:IfNumberExpr { add_stmt(STMT_IF_NUMBER,t); }
# Try to skip statements but keep any DATA, this is not
# easy because we should parse "valid" statements here.
( ':' SPC { disable_parsing(); }
StatementLine { enable_parsing(); }
)? { add_force_line(); }
# 2- IF/THEN followed by statements, adding an invisible ENDIF at
# the end of the statements and forcing a line-break.
| IF t:IfThenExpr { add_stmt(STMT_IF_THEN,t); }
StatementLine { add_stmt(STMT_ENDIF_INVISIBLE,0); add_force_line(); }
# 3- A multi-line IF - parsed as Turbo Basic:
| &{ parsingTurbo() }
IF t:NumExprErr { add_stmt(STMT_IF_MULTILINE,t); }
# 4- A multi-line IF - parsed as Atari BASIC:
| &{ !parsingTurbo() }
IF t:NumExprErr { add_stmt(STMT_IF_THEN,ex_bin(t,0,TOK_THEN)); }
| LIST { t=0; } t:ListExpr? { add_stmt(STMT_LIST,t); }
| LET t:LetExpr { add_stmt(STMT_LET,t); }
| LOAD t:StrExprErr { add_stmt(STMT_LOAD,t); }
| LOCATE t:LocateExpr { add_stmt(STMT_LOCATE,t); }
| LPRINT t:PrintExpr { add_stmt(STMT_LPRINT,t); }
| LOOP { add_stmt(STMT_LOOP,0); }
| LOCK t:StrExprErr { add_stmt(STMT_LOCK,t); }
| MOVE t:NumExpr3 { add_stmt(STMT_MOVE,t); }
| N_MOVE t:NumExpr3 { add_stmt(STMT_N_MOVE,t); }
| NEXT t:PVarNum { add_stmt(STMT_NEXT,t); }
| NEW { add_stmt(STMT_NEW,0); }
| NOTE t:IOVarNumExpr2 { add_stmt(STMT_NOTE,t); }
| OPEN t:OpenExpr { add_stmt(STMT_OPEN,t); }
| ON t:OnExpr { add_stmt(STMT_ON,t); }
| POINT t:IONumExpr2 { add_stmt(STMT_POINT,t); }
| POKE t:NumExpr2 { add_stmt(STMT_POKE,t); }
| PRINT t:PrintIoExpr { add_stmt(STMT_PRINT,t); }
| PRINT_ t:PrintIoExpr { add_stmt(STMT_PRINT_,t); }
| POP { add_stmt(STMT_POP,0); }
| PUT t:PutExpr { add_stmt(STMT_PUT,t); }
| PLOT t:NumExpr2 { add_stmt(STMT_PLOT,t); }
| POSITION t:NumExpr2 { add_stmt(STMT_POSITION,t); }
| PAUSE t:NumExprErr { add_stmt(STMT_PAUSE,t); }
| PROC t:LabelProcVarList { add_stmt(STMT_PROC_VAR,t); }
| PROC t:Label { add_stmt(STMT_PROC,t); }
| PAINT t:NumExpr2 { add_stmt(STMT_PAINT,t); }
| RAD { add_stmt(STMT_RAD,0); }
| READ t:VariableList { add_stmt(STMT_READ,t); }
| RESTORE (t:LabelOrLNumExpr { add_stmt(STMT_RESTORE,t); } | { add_stmt(STMT_RESTORE,0); } )
| RETURN { add_stmt(STMT_RETURN,0); }
| RUN (t:StrExpr { add_stmt(STMT_RUN,t); } | { add_stmt(STMT_RUN,0); } )
| REPEAT { add_stmt(STMT_REPEAT,0); }
| RENAME t:StrExprErr { add_stmt(STMT_RENAME,t); }
| RENUM t:NumExpr3 { add_stmt(STMT_RENUM,t); }
| SAVE t:StrExprErr { add_stmt(STMT_SAVE,t); }
| STATUS t:StatusExpr { add_stmt(STMT_STATUS,t); }
| STOP { add_stmt(STMT_STOP,0); }
| SETCOLOR t:NumExpr3 { add_stmt(STMT_SETCOLOR,t); }
| SOUND t:NumExpr4 { add_stmt(STMT_SOUND,t); }
| SOUND &{ parsingTurbo() } { add_stmt(STMT_SOUND,0); }
| TRAP t:LabelOrLNumExpr { add_stmt(STMT_TRAP,t); }
| TRACE { add_stmt(STMT_TRACE,0); }
| TEXT t:TextExpr { add_stmt(STMT_TEXT,t); }
| UNTIL t:NumExprErr { add_stmt(STMT_UNTIL,t); }
| UNLOCK t:StrExprErr { add_stmt(STMT_UNLOCK,t); }
| WHILE t:NumExprErr { add_stmt(STMT_WHILE,t); }
| WEND { add_stmt(STMT_WEND,0); }
| XIO t:XioExpr { add_stmt(STMT_XIO,t); }
| F_F {t=0;} t:FlagExpr? { add_stmt(STMT_F_F,t); }
| F_L {t=0;} t:FlagExpr? { add_stmt(STMT_F_L,t); }
| F_B {t=0;} t:FlagExpr? { add_stmt(STMT_F_B,t); }
| P_PUT t:PutExpr { add_stmt(STMT_P_PUT,t); }
| P_GET t:GetExpr { add_stmt(STMT_P_GET,t); }
| LBL_S t:Label { add_stmt(STMT_LBL_S,t); }
# A basic ERROR- line, parsed for compatibility
| < BAS_ERROR ERROR > { add_stmt(STMT_BAS_ERROR, add_comment(yytext,yyleng,0)); print_error("statement", yytext); }
# And, if not any of the above, we declare a parsing error
| < ERROR > { add_stmt(STMT_BAS_ERROR, add_comment(yytext,yyleng,0)); print_error("statement", yytext); }
# Catches errors and skips to end of statement
ERROR = [^:\233\015\n\t ][^:\015\n\233]*
# Catches errors and skips to end of expression
ERROREXP = [^:\233\015\n\t ][^,:\015\n\233]*
# BPUT / BGET / POINT
IONumExpr2 = l:IOChanErr COMMA r:NumExpr2 { $$ = ex_bin(l,r,TOK_COMMA); }
# Assignments
LetExpr = LetExprStr | LetExprNum
LetExprStr = l:AssignVarStr EQ r:StrExprErr { $$ = ex_bin(l,r,TOK_S_ASGN); }
LetExprNum = l:AssignVarNum EQ r:NumExprErr { $$ = ex_bin(l,r,TOK_F_ASGN); }
# Expressions
NumExpr2 = l:NumExprErr COMMA r:NumExprErr { $$ = ex_bin(l,r,TOK_COMMA); }
| < ERROR > { print_error("2 numeric expressions", yytext); }
NumExpr3 = l:NumExpr2 COMMA r:NumExprErr { $$ = ex_bin(l,r,TOK_COMMA); }
| < ERROR > { print_error("3 numeric expressions", yytext); }
NumExpr4 = l:NumExpr3 COMMA r:NumExprErr { $$ = ex_bin(l,r,TOK_COMMA); }
| < ERROR > { print_error("4 numeric expressions", yytext); }
CircleExpr = l:NumExpr3 { $$ = l; }
(COMMA r:NumExprErr { $$ = ex_bin(l,r,TOK_COMMA); }
)?
IOChan = SHARP r:NumExprErr { $$ = ex_bin(0,r,TOK_SHARP); }
IOChanErr = IOChan
| < ERROREXP > { print_error("I/O channel (#)", yytext); $$ = 0; }
AnyExpr = NumExpr | StrExpr
VarNumComma = l:PVarNum (COMMA r:PVarNum { l = ex_comma(l,r); }
)* { $$ = l; }
NumComma = l:NumExprErr (COMMA r:NumExprErr { l = ex_comma(l,r); }
)* { $$ = l; }
LabelComma = l:Label (COMMA r:Label { l = ex_comma(l,r); }
)* { $$ = l; }
PrintExpr = {l=0;} l:AnyExpr?
( COMMA r:AnyExpr { l = ex_bin(l,r,TOK_COMMA); }
| SEMICOLON r:AnyExpr { l = ex_bin(l,r,TOK_SEMICOLON); }
| COMMA { l = ex_bin(l,0,TOK_COMMA); }
| SEMICOLON { l = ex_bin(l,0,TOK_SEMICOLON); }
)* { $$ = l; }
FlagExpr = MINUS { $$ = ex_bin(0,0,TOK_MINUS); }
| PLUS { $$ = ex_bin(0,0,TOK_PLUS); }
# FOR statement expression:
ForStmtExpr = l:PVarNum EQ r:NumExprErr { l = ex_bin(l,r,TOK_F_ASGN); }
FOR_TO r:NumExprErr { l = ex_bin(l,r,TOK_FOR_TO); }
(STEP r:NumExprErr { l = ex_bin(l,r,TOK_STEP); }
)? { $$ = l; }
# GET / %GET expressions:
GetExpr = l:IOChan COMMA r:VarNumComma { $$ = ex_comma(l, r); }
| &{ parsingTurbo() } VarNumComma
# PUT / %PUT expressions:
PutExpr = l:IOChan COMMA r:NumComma { $$ = ex_comma(l, r); }
| &{ parsingTurbo() } NumComma
| r:NumComma { $$ = ex_comma(ex_bin(0,add_number(16),TOK_SHARP), r); }
# XIO expression:
XioExpr = n1:NumExprErr COMMA n2:IOChanErr COMMA n3:NumExpr2 COMMA n4:StrExprErr
{ $$ = ex_comma(ex_comma(ex_comma(n1,n2),n3),n4); }
# STATUS expression
StatusExpr = l:IOChanErr COMMA r:PVarNum { $$ = ex_comma(l,r); }
# PRINT and ? expressions:
PrintIoExpr = l:IOChan
( COMMA r:PrintExpr { l = ex_bin(l,r, TOK_COMMA); }
| SEMICOLON r:PrintExpr { l = ex_bin(l,r, TOK_SEMICOLON); }
)? { $$ = l; }
| PrintExpr
# INPUT expressions:
InputExpr = l:IOChan COMMA r:VariableList { $$ = ex_comma(l,r); }
| l:IOChan SEMICOLON r:VariableList { $$ = ex_bin(l,r,TOK_SEMICOLON); }
| &{ parsingTurbo() } l:StringData
( COMMA r:VariableList { $$ = ex_comma(l,r); }
| SEMICOLON r:VariableList { $$ = ex_bin(l,r,TOK_SEMICOLON); }
)
| VariableList
# IF / THEN number
IfNumberExpr = l:NumExprErr THEN r:Number { $$ = ex_bin(l,r,TOK_THEN); }
# IF / THEN statement
IfThenExpr = l:NumExprErr THEN { $$ = ex_bin(l,0,TOK_THEN); }
# LIST expression:
ListExpr = l:StrExpr
( COMMA r:NumExpr { l = ex_comma(l,r); }
( COMMA r:NumExpr { l = ex_comma(l,r); } )? )?
{ $$ = l; }
| l:NumExpr COMMA r:NumExprErr { $$ = ex_comma(l,r); }
| NumExprErr
# LOCATE expression:
LocateExpr = l:NumExpr2 COMMA r:PVarNum { $$ = ex_comma(l,r); }
# Used in NOTE
IOVarNumExpr2 = n1:IOChanErr COMMA n2:PVarNum COMMA n3:PVarNum { $$ = ex_comma(ex_comma(n1,n2),n3); }
# OPEN expression:
OpenExpr = n1:IOChanErr COMMA n2:NumExprErr COMMA n3:NumExprErr COMMA n4:StrExprErr
{ $$ = ex_comma(ex_comma(ex_comma(n1,n2),n3),n4); }
# ON GOTO/GOSUB/GO#/EXEC
OnExpr = l:NumExprErr
( ON_GOTO r:NumComma { $$ = ex_bin(l,r,TOK_ON_GOTO); }
| ON_GOSUB r:NumComma { $$ = ex_bin(l,r,TOK_ON_GOSUB); }
| ON_GOSHARP r:LabelComma { $$ = ex_bin(l,r,TOK_ON_GOSHARP); }
| ON_EXEC r:LabelComma { $$ = ex_bin(l,r,TOK_ON_EXEC); }
| < ERROR > { print_error("on goto/gosub/go#/exec", yytext); $$ = l; }
)
# Used on RESTORE and TRAP:
LabelOrLNumExpr = SHARP r:Label { $$ = ex_bin(0,r,TOK_SHARP); }
| NumExprErr
# Used on TEXT
TextExpr = l:NumExpr2 COMMA r:AnyExpr { $$ = ex_comma(l,r); }
# Parse PROC with parameters: PROC label, var1, var2$(size), varN; local1, local2, localN
ProcVar = PVarNum
| l:PDimVarStr r:ConstNum R_PRN { $$ = ex_bin(l,r,TOK_DS_L_PRN); }
| < ERROR > { print_error("proc argument", yytext); $$ = l; }
ProcVariableList = l:ProcVar (COMMA r:ProcVar { l = ex_comma(l,r); }
)* { $$ = l; }
ProcVarList = COMMA? SEMICOLON r:ProcVariableList { $$ = ex_bin(0,r,TOK_SEMICOLON); }
| COMMA l:ProcVariableList
( SEMICOLON r:ProcVariableList
| { r = 0; }
)? { $$ = ex_bin(l,r,TOK_SEMICOLON); }
LabelProcVarList = l:Label r:ProcVarList { $$ = ex_comma(l,r); }
# Parse EXEC with parameters: EXEC label, param1, param2, paramN
ExecParExpr = r:NumExpr { $$ = ex_bin(0,r,TOK_F_ASGN); }
| r:StrExpr { $$ = ex_bin(0,r,TOK_S_ASGN); }
AnyExprList = l:ExecParExpr ( COMMA r:ExecParExpr { l = ex_comma(l,r); }
)* { $$ = l; }
LabelExecParList = l:Label COMMA r:AnyExprList { $$ = ex_comma(l,r); }
# Used in INPUT or READ, needs a list of numeric or string variables.
VariableList = l:PVarNumStr (COMMA r:PVarNumStr { l = ex_comma(l,r); }
)* { $$ = l; }
| < ERROR > { print_error("numeric or string variable", yytext); $$ = 0; }
PVarNumStr = PVarNum
| PVarStr
AssignVarNum = l:PVarArray r:ArrayAccess { $$ = ex_bin(l,r,TOK_A_L_PRN); }
| PVarNum
AssignVarStr = l:PVarStr ( L_PRN r:ArrayAccess { l = ex_bin(l,r,TOK_S_L_PRN); }
)? { $$ = l; }
ArrayAccess = l:NumExprErr ( COMMA r:NumExprErr { l = ex_bin(l,r,TOK_A_COMMA); }
)? R_PRN { $$ = l; }
DimVarList = l:DimVar (COMMA r:DimVar { l = ex_comma(l,r); }
)* { $$ = l; }
DimVar = l:PDimVarArray r:ArrayAccess { $$ = ex_bin(l,r,TOK_D_L_PRN); }
| l:PDimVarStr r:NumExpr R_PRN { $$ = ex_bin(l,r,TOK_DS_L_PRN); }
| < ERROREXP > { print_error("DIM string/array", yytext); $$ = 0; }
# Variables
Label = < Identifier > SPC { $$ = add_ident(yytext, vtLabel); }
PVarStr = < Identifier > '$' SPC { $$ = add_ident(yytext, vtString); }
PVarNum = < Identifier > ![$(] SPC { $$ = add_ident(yytext, vtFloat); }
PVarArray = < Identifier > L_PRN SPC { $$ = add_ident(yytext, vtArray); }
PDimVarArray = < Identifier > L_PRN SPC { $$ = add_ident(yytext, vtArray); }
PDimVarStr = < Identifier > '$' SPC L_PRN SPC { $$ = add_ident(yytext, vtString); }
# Defs
StringDef = '@' < Identifier > '$' { $$ = add_strdef_val(yytext); } SPC
NumericDef = '@' < Identifier > !'$' { $$ = add_numdef_val(yytext); } SPC
# Those constructs produce errors if not matched
NumExprErr = NumExpr
| < ERROREXP > { print_error("numeric expression", yytext); $$ = 0; }
StrExprErr = StrExpr
| < ERROREXP > { print_error("string expression", yytext); $$ = 0; }
# String expressions
StrExpr = STRP r:ParNumExpr { $$ = ex_bin(0,r,TOK_STRP); }
| CHRP r:ParNumExpr { $$ = ex_bin(0,r,TOK_CHRP); }
| HEXP r:ParNumExpr { $$ = ex_bin(0,r,TOK_HEXP); }
| INKEYP { $$ = ex_bin(0,0,TOK_INKEYP); }
| TIMEP { $$ = ex_bin(0,0,TOK_TIMEP); }
| StringData
| StringDef
| AssignVarStr
# Any type of string
StringData = ( ConstString
| ExtendedString ) { $$ = add_string(); }
# Constant string, enclosed in ""
ConstString = '"' < StrContent? ( '"' '"' StrContent? )* > { push_string_const(yytext, yyleng); } '"' SPC
StrContent = [^"]+
# Extended string, enclosed in [" "]
ExtStringStart = '[' '"'
ExtStringEnd = '"' ']'
ExtendedString = ExtStringStart < (!ExtStringEnd . )* >
(
ExtStringEnd { push_extended_string(yytext, yyleng); }
| EndOfFile { print_error("end of extended string (\"])", yytext); }
)
# Numeric Expressions
NumExpr = l:AndExpr (
OR r:AndExpr { l = ex_bin(l,r,TOK_OR); }
)* { $$ = l; }
AndExpr = l:CompExpr (
AND r:CompExpr { l = ex_bin(l,r,TOK_AND); }
)* { $$ = l; }
CompExpr =
l:NotExpr (
LEQ r:NotExpr { l = ex_bin(l,r,TOK_N_LEQ); }
| NEQ r:NotExpr { l = ex_bin(l,r,TOK_N_NEQ); }
| GEQ r:NotExpr { l = ex_bin(l,r,TOK_N_GEQ); }
| LE r:NotExpr { l = ex_bin(l,r,TOK_N_LE); }
| GE r:NotExpr { l = ex_bin(l,r,TOK_N_GE); }
| EQ r:NotExpr { l = ex_bin(l,r,TOK_N_EQ); }
)* { $$ = l; }
NotExpr = NOT r:NotExpr { $$ = ex_bin(0,r,TOK_NOT); }
| AddExpr
AddExpr = l:MultExpr (
PLUS r:MultExpr { l = ex_bin(l,r,TOK_PLUS); }
| MINUS r:MultExpr { l = ex_bin(l,r,TOK_MINUS); }
)* { $$ = l; }
MultExpr = l:BitExpr (
STAR r:BitExpr { l = ex_bin(l,r,TOK_STAR); }
| SLASH r:BitExpr { l = ex_bin(l,r,TOK_SLASH); }
| DIV r:BitExpr { l = ex_bin(l,r,TOK_DIV); }
| MOD r:BitExpr { l = ex_bin(l,r,TOK_MOD); }
)* { $$ = l; }
BitExpr = l:PowExpr (
ANDPER r:PowExpr { l = ex_bin(l,r,TOK_ANDPER); }
| EXCLAM r:PowExpr { l = ex_bin(l,r,TOK_EXCLAM); }
| EXOR r:PowExpr { l = ex_bin(l,r,TOK_EXOR); }
)* { $$ = l; }
PowExpr = l:NegExpr (
CARET r:NegExpr { l = ex_bin(l,r,TOK_CARET); }
)* { $$ = l; }
NegExpr = MINUS r:NegExpr { $$ = ex_bin(0,r,TOK_UMINUS); }
| PLUS r:NegExpr { $$ = ex_bin(0,r,TOK_UPLUS); }
| UnitExpr
UnitExpr = ConstNum
| StrCompExpr
| L_PRN r:NumExpr R_PRN { $$ = ex_bin(0,r,TOK_L_PRN); }
| USR r:ParUsrExpr { $$ = ex_bin(0,r,TOK_USR); }
| ASC r:ParStrExpr { $$ = ex_bin(0,r,TOK_ASC); }
| VAL r:ParStrExpr { $$ = ex_bin(0,r,TOK_VAL); }
| LEN r:ParStrExpr { $$ = ex_bin(0,r,TOK_LEN); }
| ADR r:ParStrExpr { $$ = ex_bin(0,r,TOK_ADR); }
| ATN r:ParNumExpr { $$ = ex_bin(0,r,TOK_ATN); }
| COS r:ParNumExpr { $$ = ex_bin(0,r,TOK_COS); }
| PEEK r:ParNumExpr { $$ = ex_bin(0,r,TOK_PEEK); }
| SIN r:ParNumExpr { $$ = ex_bin(0,r,TOK_SIN); }
| RND r:ParNumExpr { $$ = ex_bin(0,r,TOK_RND); }
| RND_S { $$ = ex_bin(0,0,TOK_RND_S); }
| FRE r:ParNumExpr { $$ = ex_bin(0,r,TOK_FRE); }
| EXP r:ParNumExpr { $$ = ex_bin(0,r,TOK_EXP); }
| LOG r:ParNumExpr { $$ = ex_bin(0,r,TOK_LOG); }
| CLOG r:ParNumExpr { $$ = ex_bin(0,r,TOK_CLOG); }
| SQR r:ParNumExpr { $$ = ex_bin(0,r,TOK_SQR); }
| SGN r:ParNumExpr { $$ = ex_bin(0,r,TOK_SGN); }
| ABS r:ParNumExpr { $$ = ex_bin(0,r,TOK_ABS); }
| INT r:ParNumExpr { $$ = ex_bin(0,r,TOK_INT); }
| PADDLE r:ParNumExpr { $$ = ex_bin(0,r,TOK_PADDLE); }
| STICK r:ParNumExpr { $$ = ex_bin(0,r,TOK_STICK); }
| PTRIG r:ParNumExpr { $$ = ex_bin(0,r,TOK_PTRIG); }
| STRIG r:ParNumExpr { $$ = ex_bin(0,r,TOK_STRIG); }
| DPEEK r:ParNumExpr { $$ = ex_bin(0,r,TOK_DPEEK); }
| INSTR r:ParInstrExpr { $$ = ex_bin(0,r,TOK_INSTR); }
| DEC r:ParStrExpr { $$ = ex_bin(0,r,TOK_DEC); }
| FRAC r:ParNumExpr { $$ = ex_bin(0,r,TOK_FRAC); }
| RAND r:ParNumExpr { $$ = ex_bin(0,r,TOK_RAND); }
| TRUNC r:ParNumExpr { $$ = ex_bin(0,r,TOK_TRUNC); }
| UINSTR r:ParInstrExpr { $$ = ex_bin(0,r,TOK_UINSTR); }
| TIME !'$' { $$ = ex_bin(0,0,TOK_TIME); }
| ERR { $$ = ex_bin(0,0,TOK_ERR); }
| ERL { $$ = ex_bin(0,0,TOK_ERL); }
| AssignVarNum
# Compile time constant numeric expression - note that we could support more
# values with optimization ON
ConstNum = Number
| NumericDef
| &{ parsingTurbo() } (
PER_0 { $$ = ex_bin(0,0,TOK_PER_0); }
| PER_1 { $$ = ex_bin(0,0,TOK_PER_1); }
| PER_2 { $$ = ex_bin(0,0,TOK_PER_2); }
| PER_3 { $$ = ex_bin(0,0,TOK_PER_3); }
)
| &{ !parsingTurbo() } (
PER_0 { $$ = add_number(0); }
| PER_1 { $$ = add_number(1); }
| PER_2 { $$ = add_number(2); }
| PER_3 { $$ = add_number(3); }
)
# String comparisons is a type of numeric expresion
StrCompExpr = l:StrExpr (
LEQ r:StrExprErr { $$ = ex_bin(l,r,TOK_S_LEQ); }
| NEQ r:StrExprErr { $$ = ex_bin(l,r,TOK_S_NEQ); }
| GEQ r:StrExprErr { $$ = ex_bin(l,r,TOK_S_GEQ); }
| LE r:StrExprErr { $$ = ex_bin(l,r,TOK_S_LE); }
| GE r:StrExprErr { $$ = ex_bin(l,r,TOK_S_GE); }
| EQ r:StrExprErr { $$ = ex_bin(l,r,TOK_S_EQ); }
)
# Parameters to an USR function, one or more numeric expressions in parenthesis
NumAComma = l:NumExprErr (COMMA r:NumExprErr { l = ex_bin(l,r,TOK_A_COMMA); }
)* { $$ = l; }
ParUsrExpr = L_PRN ( l:NumAComma R_PRN { $$ = l; }
| < ERROREXP > { print_error("numeric (,numeric) expressions", yytext); $$ = 0; }
)
# Parameters to functions with one numeric expression in parenthesis
ParNumExpr = L_PRN ( l:NumExpr R_PRN { $$ = l; }
| < ERROREXP > { print_error("numeric expression in parenthesis", yytext); $$ = 0; }
)
# Parameters to INSTR/UINSTR functions, two string expressions and optionally one numeric
# expression, all in parenthesis
ParInstrExpr = L_PRN
( l:StrExpr COMMA r:StrExpr { l = ex_bin(l,r,TOK_A_COMMA); }
( COMMA r:NumExpr { l = ex_bin(l,r,TOK_A_COMMA); } )?
R_PRN { $$ = l; }
| < ERROREXP > { print_error("string, string (,numeric) expressions", yytext); }
)
# Parameters to functions with one string expression in parenthesis
ParStrExpr = L_PRN l:StrExprErr R_PRN { $$ = l; }
# Spacing...
SPC = [ \t]*
EndOfLine = ( '\n' | '\233' | "\r\n" | '\r' | EndOfFile ) { inc_file_line(); }
NotEOL = [^\n\233\r]
EndOfFile = !.
UnicodeBOM = "\357\273\277"
# Line Numbers - accept any floating point number and check later for validity
LineNumber =( < '-'? [0-9]+ ( '.' [0-9]+ )? NumExp? > SPC
| < '-'? '.' [0-9]+ NumExp? > SPC ) { add_linenum( strtod(yytext,0) ); }
# Identifiers (labels / variables)
IdentifierInit = [a-zA-Z_]
IdentifierChar = [a-zA-Z0-9_]
Identifier = IdentifierInit IdentifierChar*
# Numbers
Number = HexNumber { $$ = parsingTurbo() ? add_hex_number( strtol(yytext,0,16) ) : add_number( strtol(yytext,0,16) ); }
| DecNumber { $$ = add_number( strtod(yytext,0) ); }
HexNumber = '$' < [a-fA-F0-9]+ > SPC
IntNumber = < [0-9]+ > SPC
DecNumber = < '-'? [0-9]+ ( '.' [0-9]* )? NumExp? > SPC
| < '-'? '.' [0-9]+ NumExp? > SPC
# The exponent of a floating point number
NumExp = ( 'e' | 'E' ) ( '+' | '-' )? [0-9] [0-9]?
# Parse REMs
RemExpr1 = l:RemStmt1 < NotEOL* > { $$ = add_comment(yytext, yyleng, l); }
RemExpr2 = l:RemStmt2 < NotEOL* > { $$ = add_comment(yytext, yyleng, l); }
RemExpr3 = l:RemStmt3 < NotEOL* > { $$ = add_comment(yytext, yyleng, l); }
RemStmt1 = < REM_C SPC > { $$ = add_comment(yytext, yyleng, 0); }
RemStmt2 = < REM_ SPC > { $$ = add_comment(yytext, yyleng, 0); }
RemStmt3 = < REM SPC > { $$ = add_comment(yytext, yyleng, 0); }
# Parse special REMs
REM_C = "'" SPC
# Simple TOKENS
COMMA = ',' SPC
SEMICOLON = ';' SPC
SHARP = '#' SPC
LEQ = '<=' SPC
NEQ = '<>' SPC
GEQ = '>=' SPC
LE = '<' SPC
GE = '>' SPC
EQ = '=' SPC
CARET = '^' SPC
STAR = '*' SPC
PLUS = '+' SPC
MINUS = '-' SPC
SLASH = '/' SPC
L_PRN = '(' SPC
R_PRN = ')' SPC
ANDPER = &{ parsingTurbo() } '&' SPC
EXCLAM = &{ parsingTurbo() } '!' SPC
PER_0 = '%0' SPC
PER_1 = '%1' SPC
PER_2 = '%2' SPC
PER_3 = '%3' SPC