-
Notifications
You must be signed in to change notification settings - Fork 1
Expand file tree
/
Copy pathparser.py
More file actions
828 lines (662 loc) · 29.4 KB
/
parser.py
File metadata and controls
828 lines (662 loc) · 29.4 KB
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
"""
BlackRoad OS Language Parser
Transforms tokens into an Abstract Syntax Tree (AST)
"""
from typing import List, Optional, Union
from lexer import Token, TokenType, lex
from ast_nodes import *
class Parser:
"""Recursive descent parser for BlackRoad language"""
def __init__(self, tokens: List[Token]):
self.tokens = tokens
self.pos = 0
def current_token(self) -> Token:
"""Get current token"""
if self.pos >= len(self.tokens):
return self.tokens[-1] # EOF
return self.tokens[self.pos]
def peek_token(self, offset: int = 1) -> Token:
"""Look ahead at token"""
pos = self.pos + offset
if pos >= len(self.tokens):
return self.tokens[-1] # EOF
return self.tokens[pos]
def advance(self) -> Token:
"""Move to next token"""
token = self.current_token()
if token.type != TokenType.EOF:
self.pos += 1
return token
def expect(self, token_type: TokenType) -> Token:
"""Expect a specific token type"""
token = self.current_token()
if token.type != token_type:
raise SyntaxError(f"Expected {token_type.name}, got {token.type.name} at {token.line}:{token.column}")
return self.advance()
def match(self, *token_types: TokenType) -> bool:
"""Check if current token matches any of the given types"""
return self.current_token().type in token_types
def skip_newlines(self):
"""Skip NEWLINE tokens"""
while self.match(TokenType.NEWLINE):
self.advance()
# ========================================================================
# Program & Statements
# ========================================================================
def parse_program(self) -> Program:
"""Parse entire program"""
statements = []
self.skip_newlines()
while not self.match(TokenType.EOF):
stmt = self.parse_statement()
if stmt:
statements.append(stmt)
self.skip_newlines()
token = self.current_token()
return Program(statements, line=token.line, column=token.column)
def parse_statement(self) -> Optional[Statement]:
"""Parse a statement"""
self.skip_newlines()
# Module declaration
if self.match(TokenType.MODULE):
return self.parse_module_declaration()
# Import statement
if self.match(TokenType.IMPORT, TokenType.FROM):
return self.parse_import_statement()
# Function definition
if self.match(TokenType.FUN, TokenType.ASYNC):
return self.parse_function_definition()
# Type definition
if self.match(TokenType.TYPE):
return self.parse_type_definition()
# Space definition (3D)
if self.match(TokenType.SPACE):
return self.parse_space_definition()
# Variable declaration
if self.match(TokenType.LET, TokenType.VAR, TokenType.CONST):
return self.parse_variable_declaration()
# Control flow
if self.match(TokenType.IF):
return self.parse_if_statement()
if self.match(TokenType.MATCH):
return self.parse_match_statement()
if self.match(TokenType.FOR):
return self.parse_for_loop()
if self.match(TokenType.WHILE):
return self.parse_while_loop()
# Return, break, continue
if self.match(TokenType.RETURN):
return self.parse_return_statement()
if self.match(TokenType.BREAK):
token = self.advance()
return BreakStatement(line=token.line, column=token.column)
if self.match(TokenType.CONTINUE):
token = self.advance()
return ContinueStatement(line=token.line, column=token.column)
# Spawn (concurrency)
if self.match(TokenType.SPAWN):
return self.parse_spawn_statement()
# Export
if self.match(TokenType.EXPORT):
token = self.advance()
stmt = self.parse_statement()
return ExportStatement(stmt, line=token.line, column=token.column)
# Expression statement or assignment
return self.parse_expression_or_assignment()
def parse_module_declaration(self) -> ModuleDeclaration:
"""Parse module declaration: module math"""
token = self.expect(TokenType.MODULE)
name_token = self.expect(TokenType.IDENTIFIER)
return ModuleDeclaration(name_token.value, line=token.line, column=token.column)
def parse_import_statement(self) -> ImportStatement:
"""Parse import statement"""
token = self.current_token()
if self.match(TokenType.FROM):
# from math import factorial, fibonacci
self.advance()
module_token = self.expect(TokenType.IDENTIFIER)
self.expect(TokenType.IMPORT)
items = []
items.append(self.expect(TokenType.IDENTIFIER).value)
while self.match(TokenType.COMMA):
self.advance()
items.append(self.expect(TokenType.IDENTIFIER).value)
return ImportStatement(module_token.value, None, items, line=token.line, column=token.column)
else:
# import math or import http as network
self.expect(TokenType.IMPORT)
module_token = self.expect(TokenType.IDENTIFIER)
alias = None
if self.match(TokenType.IDENTIFIER) and self.current_token().value == 'as':
self.advance()
alias = self.expect(TokenType.IDENTIFIER).value
return ImportStatement(module_token.value, alias, None, line=token.line, column=token.column)
def parse_variable_declaration(self) -> VariableDeclaration:
"""Parse variable declaration: let x: int = 42"""
token = self.current_token()
is_const = self.match(TokenType.CONST)
is_mutable = self.match(TokenType.VAR)
self.advance() # let, var, or const
name_token = self.expect(TokenType.IDENTIFIER)
name = name_token.value
# Optional type annotation
type_annotation = None
if self.match(TokenType.COLON):
self.advance()
type_annotation = self.parse_type()
# Optional initializer
initializer = None
if self.match(TokenType.ASSIGN):
self.advance()
initializer = self.parse_expression()
return VariableDeclaration(
name, type_annotation, initializer,
is_mutable, is_const,
line=token.line, column=token.column
)
def parse_function_definition(self) -> FunctionDefinition:
"""Parse function definition"""
token = self.current_token()
is_async = False
if self.match(TokenType.ASYNC):
is_async = True
self.advance()
self.expect(TokenType.FUN)
name_token = self.expect(TokenType.IDENTIFIER)
name = name_token.value
# Parameters
self.expect(TokenType.LPAREN)
parameters = self.parse_parameters()
self.expect(TokenType.RPAREN)
# Return type
return_type = None
if self.match(TokenType.ARROW):
self.advance()
return_type = self.parse_type()
# Body
self.expect(TokenType.COLON)
self.skip_newlines()
self.expect(TokenType.INDENT)
body = self.parse_block()
self.expect(TokenType.DEDENT)
return FunctionDefinition(
name, parameters, return_type, body, is_async, False,
line=token.line, column=token.column
)
def parse_parameters(self) -> List[Parameter]:
"""Parse function parameters"""
parameters = []
if self.match(TokenType.RPAREN):
return parameters
while True:
param_token = self.current_token()
# Check for variadic parameter
is_variadic = False
if self.match(TokenType.TRIPLE_DOT):
is_variadic = True
self.advance()
name = self.expect(TokenType.IDENTIFIER).value
# Optional type annotation
type_annotation = None
if self.match(TokenType.COLON):
self.advance()
type_annotation = self.parse_type()
# Optional default value
default_value = None
if self.match(TokenType.ASSIGN):
self.advance()
default_value = self.parse_expression()
parameters.append(Parameter(
name, type_annotation, default_value, is_variadic,
line=param_token.line, column=param_token.column
))
if not self.match(TokenType.COMMA):
break
self.advance()
return parameters
def parse_block(self) -> List[Statement]:
"""Parse a block of statements"""
statements = []
self.skip_newlines()
while not self.match(TokenType.DEDENT, TokenType.EOF):
stmt = self.parse_statement()
if stmt:
statements.append(stmt)
self.skip_newlines()
return statements
def parse_if_statement(self) -> IfStatement:
"""Parse if statement"""
token = self.expect(TokenType.IF)
condition = self.parse_expression()
self.expect(TokenType.COLON)
self.skip_newlines()
self.expect(TokenType.INDENT)
then_block = self.parse_block()
self.expect(TokenType.DEDENT)
self.skip_newlines()
# Elif blocks
elif_blocks = []
while self.match(TokenType.ELIF):
self.advance()
elif_condition = self.parse_expression()
self.expect(TokenType.COLON)
self.skip_newlines()
self.expect(TokenType.INDENT)
elif_block = self.parse_block()
self.expect(TokenType.DEDENT)
self.skip_newlines()
elif_blocks.append((elif_condition, elif_block))
# Else block
else_block = None
if self.match(TokenType.ELSE):
self.advance()
self.expect(TokenType.COLON)
self.skip_newlines()
self.expect(TokenType.INDENT)
else_block = self.parse_block()
self.expect(TokenType.DEDENT)
return IfStatement(condition, then_block, elif_blocks, else_block, line=token.line, column=token.column)
def parse_for_loop(self) -> ForLoop:
"""Parse for loop"""
token = self.expect(TokenType.FOR)
variable = self.expect(TokenType.IDENTIFIER).value
# Check for 'in' keyword
if not (self.match(TokenType.IDENTIFIER) and self.current_token().value == 'in'):
raise SyntaxError(f"Expected 'in' in for loop at {self.current_token().line}:{self.current_token().column}")
self.advance()
iterable = self.parse_expression()
self.expect(TokenType.COLON)
self.skip_newlines()
self.expect(TokenType.INDENT)
body = self.parse_block()
self.expect(TokenType.DEDENT)
return ForLoop(variable, iterable, body, line=token.line, column=token.column)
def parse_while_loop(self) -> WhileLoop:
"""Parse while loop"""
token = self.expect(TokenType.WHILE)
condition = self.parse_expression()
self.expect(TokenType.COLON)
self.skip_newlines()
self.expect(TokenType.INDENT)
body = self.parse_block()
self.expect(TokenType.DEDENT)
return WhileLoop(condition, body, line=token.line, column=token.column)
def parse_return_statement(self) -> ReturnStatement:
"""Parse return statement"""
token = self.expect(TokenType.RETURN)
value = None
if not self.match(TokenType.NEWLINE, TokenType.EOF, TokenType.DEDENT):
value = self.parse_expression()
return ReturnStatement(value, line=token.line, column=token.column)
def parse_expression_or_assignment(self) -> Union[ExpressionStatement, Assignment, CompoundAssignment]:
"""Parse expression statement or assignment"""
expr = self.parse_expression()
# Check for assignment
if self.match(TokenType.ASSIGN):
token = self.advance()
value = self.parse_expression()
return Assignment(expr, value, line=token.line, column=token.column)
# Check for compound assignment
if self.match(TokenType.PLUS_ASSIGN, TokenType.MINUS_ASSIGN,
TokenType.STAR_ASSIGN, TokenType.SLASH_ASSIGN):
token = self.advance()
value = self.parse_expression()
return CompoundAssignment(expr, token.value, value, line=token.line, column=token.column)
return ExpressionStatement(expr, line=expr.line, column=expr.column)
# ========================================================================
# Type Parsing
# ========================================================================
def parse_type(self) -> TypeNode:
"""Parse type annotation"""
token = self.current_token()
# Primitive types
if self.match(TokenType.INT, TokenType.FLOAT_TYPE, TokenType.STRING_TYPE,
TokenType.BOOL_TYPE, TokenType.BYTE, TokenType.CHAR,
TokenType.COLOR_TYPE, TokenType.ANY):
name = self.advance().value
return PrimitiveType(name, line=token.line, column=token.column)
# Vector types
if self.match(TokenType.VEC2):
self.advance()
return VectorType(2, line=token.line, column=token.column)
if self.match(TokenType.VEC3):
self.advance()
return VectorType(3, line=token.line, column=token.column)
if self.match(TokenType.VEC4):
self.advance()
return VectorType(4, line=token.line, column=token.column)
# Collection types
if self.match(TokenType.LIST):
self.advance()
self.expect(TokenType.LBRACKET)
element_type = self.parse_type()
self.expect(TokenType.RBRACKET)
return ListType(element_type, line=token.line, column=token.column)
if self.match(TokenType.DICT):
self.advance()
self.expect(TokenType.LBRACKET)
key_type = self.parse_type()
self.expect(TokenType.COMMA)
value_type = self.parse_type()
self.expect(TokenType.RBRACKET)
return DictType(key_type, value_type, line=token.line, column=token.column)
if self.match(TokenType.SET):
self.advance()
self.expect(TokenType.LBRACKET)
element_type = self.parse_type()
self.expect(TokenType.RBRACKET)
return SetType(element_type, line=token.line, column=token.column)
# Custom type
if self.match(TokenType.IDENTIFIER):
name = self.advance().value
return CustomType(name, line=token.line, column=token.column)
raise SyntaxError(f"Expected type at {token.line}:{token.column}")
# ========================================================================
# Expression Parsing (Operator Precedence)
# ========================================================================
def parse_expression(self) -> Expression:
"""Parse expression (top level - lowest precedence)"""
return self.parse_or_expression()
def parse_or_expression(self) -> Expression:
"""Parse logical OR expression"""
left = self.parse_and_expression()
while self.match(TokenType.OR):
op_token = self.advance()
right = self.parse_and_expression()
left = BinaryOp(left, 'or', right, line=op_token.line, column=op_token.column)
return left
def parse_and_expression(self) -> Expression:
"""Parse logical AND expression"""
left = self.parse_not_expression()
while self.match(TokenType.AND):
op_token = self.advance()
right = self.parse_not_expression()
left = BinaryOp(left, 'and', right, line=op_token.line, column=op_token.column)
return left
def parse_not_expression(self) -> Expression:
"""Parse logical NOT expression"""
if self.match(TokenType.NOT):
op_token = self.advance()
operand = self.parse_not_expression()
return UnaryOp('not', operand, line=op_token.line, column=op_token.column)
return self.parse_comparison_expression()
def parse_comparison_expression(self) -> Expression:
"""Parse comparison expression"""
left = self.parse_additive_expression()
while self.match(TokenType.EQ, TokenType.NE, TokenType.LT,
TokenType.GT, TokenType.LE, TokenType.GE):
op_token = self.advance()
right = self.parse_additive_expression()
left = BinaryOp(left, op_token.value, right, line=op_token.line, column=op_token.column)
return left
def parse_additive_expression(self) -> Expression:
"""Parse addition/subtraction expression"""
left = self.parse_multiplicative_expression()
while self.match(TokenType.PLUS, TokenType.MINUS):
op_token = self.advance()
right = self.parse_multiplicative_expression()
left = BinaryOp(left, op_token.value, right, line=op_token.line, column=op_token.column)
return left
def parse_multiplicative_expression(self) -> Expression:
"""Parse multiplication/division expression"""
left = self.parse_power_expression()
while self.match(TokenType.STAR, TokenType.SLASH, TokenType.PERCENT):
op_token = self.advance()
right = self.parse_power_expression()
left = BinaryOp(left, op_token.value, right, line=op_token.line, column=op_token.column)
return left
def parse_power_expression(self) -> Expression:
"""Parse exponentiation (right-associative)"""
base = self.parse_unary_expression()
if self.match(TokenType.POWER):
op_token = self.advance()
exponent = self.parse_power_expression() # right-associative
return BinaryOp(base, op_token.value, exponent, line=op_token.line, column=op_token.column)
return base
def parse_unary_expression(self) -> Expression:
"""Parse unary expression"""
if self.match(TokenType.MINUS, TokenType.PLUS):
op_token = self.advance()
operand = self.parse_unary_expression()
return UnaryOp(op_token.value, operand, line=op_token.line, column=op_token.column)
# Await expression
if self.match(TokenType.AWAIT):
op_token = self.advance()
operand = self.parse_unary_expression()
return AwaitExpression(operand, line=op_token.line, column=op_token.column)
return self.parse_postfix_expression()
def parse_postfix_expression(self) -> Expression:
"""Parse postfix expression (function call, member access, indexing)"""
expr = self.parse_primary_expression()
while True:
# Function call
if self.match(TokenType.LPAREN):
token = self.advance()
arguments = self.parse_arguments()
self.expect(TokenType.RPAREN)
expr = FunctionCall(expr, arguments, line=token.line, column=token.column)
# Member access
elif self.match(TokenType.DOT):
token = self.advance()
member = self.expect(TokenType.IDENTIFIER).value
expr = MemberAccess(expr, member, line=token.line, column=token.column)
# Index access
elif self.match(TokenType.LBRACKET):
token = self.advance()
index = self.parse_expression()
self.expect(TokenType.RBRACKET)
expr = IndexAccess(expr, index, line=token.line, column=token.column)
else:
break
return expr
def parse_arguments(self) -> List[Expression]:
"""Parse function call arguments"""
arguments = []
if self.match(TokenType.RPAREN):
return arguments
while True:
arguments.append(self.parse_expression())
if not self.match(TokenType.COMMA):
break
self.advance()
return arguments
def parse_primary_expression(self) -> Expression:
"""Parse primary expression (literals, identifiers, parenthesized)"""
token = self.current_token()
# Integer literal
if self.match(TokenType.INTEGER):
self.advance()
return IntegerLiteral(token.value, line=token.line, column=token.column)
# Float literal
if self.match(TokenType.FLOAT):
self.advance()
return FloatLiteral(token.value, line=token.line, column=token.column)
# String literal
if self.match(TokenType.STRING):
self.advance()
return StringLiteral(token.value, line=token.line, column=token.column)
# Boolean literal
if self.match(TokenType.BOOLEAN):
self.advance()
return BooleanLiteral(token.value, line=token.line, column=token.column)
# Color literal
if self.match(TokenType.COLOR):
self.advance()
return ColorLiteral(token.value, line=token.line, column=token.column)
# Vector constructor: vec3(1, 2, 3)
if self.match(TokenType.VEC2, TokenType.VEC3, TokenType.VEC4):
vec_token = self.advance()
dimension = {'vec2': 2, 'vec3': 3, 'vec4': 4}[vec_token.value]
self.expect(TokenType.LPAREN)
components = []
while not self.match(TokenType.RPAREN):
components.append(self.parse_expression())
if self.match(TokenType.COMMA):
self.advance()
self.expect(TokenType.RPAREN)
return VectorLiteral(dimension, components, line=vec_token.line, column=vec_token.column)
# List literal: [1, 2, 3]
if self.match(TokenType.LBRACKET):
self.advance()
elements = []
while not self.match(TokenType.RBRACKET):
elements.append(self.parse_expression())
if self.match(TokenType.COMMA):
self.advance()
self.expect(TokenType.RBRACKET)
return ListLiteral(elements, line=token.line, column=token.column)
# Dict literal: {key: value} or Set literal: {1, 2, 3}
if self.match(TokenType.LBRACE):
self.advance()
# Empty dict
if self.match(TokenType.RBRACE):
self.advance()
return DictLiteral([], line=token.line, column=token.column)
# Check first element
first_expr = self.parse_expression()
# Dictionary (has colon)
if self.match(TokenType.COLON):
self.advance()
first_value = self.parse_expression()
pairs = [(first_expr, first_value)]
while self.match(TokenType.COMMA):
self.advance()
key = self.parse_expression()
self.expect(TokenType.COLON)
value = self.parse_expression()
pairs.append((key, value))
self.expect(TokenType.RBRACE)
return DictLiteral(pairs, line=token.line, column=token.column)
# Set (no colon)
else:
elements = [first_expr]
while self.match(TokenType.COMMA):
self.advance()
elements.append(self.parse_expression())
self.expect(TokenType.RBRACE)
return SetLiteral(elements, line=token.line, column=token.column)
# Parenthesized expression or tuple: (expr) or (1, 2, 3)
if self.match(TokenType.LPAREN):
self.advance()
# Empty tuple
if self.match(TokenType.RPAREN):
self.advance()
return TupleLiteral([], line=token.line, column=token.column)
first_expr = self.parse_expression()
# Tuple (has comma)
if self.match(TokenType.COMMA):
elements = [first_expr]
while self.match(TokenType.COMMA):
self.advance()
if not self.match(TokenType.RPAREN):
elements.append(self.parse_expression())
self.expect(TokenType.RPAREN)
return TupleLiteral(elements, line=token.line, column=token.column)
# Just parenthesized expression
self.expect(TokenType.RPAREN)
return first_expr
# Range: 0..10
if self.match(TokenType.INTEGER):
start = IntegerLiteral(token.value, line=token.line, column=token.column)
self.advance()
if self.match(TokenType.DOUBLE_DOT):
self.advance()
end_token = self.expect(TokenType.INTEGER)
end = IntegerLiteral(end_token.value, line=end_token.line, column=end_token.column)
return RangeExpression(start, end, line=token.line, column=token.column)
return start
# Identifier
if self.match(TokenType.IDENTIFIER):
self.advance()
return Identifier(token.value, line=token.line, column=token.column)
raise SyntaxError(f"Unexpected token {token.type.name} at {token.line}:{token.column}")
# ========================================================================
# 3D/Spatial Parsing
# ========================================================================
def parse_space_definition(self) -> SpaceDefinition:
"""Parse 3D space definition"""
token = self.expect(TokenType.SPACE)
name = self.expect(TokenType.IDENTIFIER).value
self.expect(TokenType.COLON)
self.skip_newlines()
self.expect(TokenType.INDENT)
objects = []
while not self.match(TokenType.DEDENT, TokenType.EOF):
self.skip_newlines()
if self.match(TokenType.CUBE, TokenType.SPHERE, TokenType.PLANE,
TokenType.LIGHT, TokenType.CAMERA):
objects.append(self.parse_3d_object())
else:
break
self.expect(TokenType.DEDENT)
return SpaceDefinition(name, objects, line=token.line, column=token.column)
def parse_3d_object(self) -> Object3D:
"""Parse 3D object"""
token = self.current_token()
obj_type = self.advance().type
name = self.expect(TokenType.IDENTIFIER).value
self.expect(TokenType.COLON)
self.skip_newlines()
self.expect(TokenType.INDENT)
properties = []
while not self.match(TokenType.DEDENT, TokenType.EOF):
self.skip_newlines()
# Accept identifiers or type keywords as property names
if self.match(TokenType.IDENTIFIER, TokenType.COLOR_TYPE, TokenType.INT,
TokenType.FLOAT_TYPE, TokenType.STRING_TYPE, TokenType.BOOL_TYPE,
TokenType.VEC2, TokenType.VEC3, TokenType.VEC4):
prop_name_token = self.advance()
prop_name = prop_name_token.value
self.expect(TokenType.COLON)
prop_value = self.parse_expression()
properties.append(Property3D(prop_name, prop_value, line=prop_name_token.line, column=prop_name_token.column))
self.skip_newlines()
else:
break
self.expect(TokenType.DEDENT)
# Create appropriate object type
if obj_type == TokenType.CUBE:
return CubeObject(name, properties, line=token.line, column=token.column)
elif obj_type == TokenType.SPHERE:
return SphereObject(name, properties, line=token.line, column=token.column)
elif obj_type == TokenType.PLANE:
return PlaneObject(name, properties, line=token.line, column=token.column)
elif obj_type == TokenType.LIGHT:
return LightObject(name, properties, line=token.line, column=token.column)
elif obj_type == TokenType.CAMERA:
return CameraObject(name, properties, line=token.line, column=token.column)
# Stubs for other complex features
def parse_type_definition(self) -> TypeDefinition:
"""Parse type definition (stub)"""
# TODO: Implement full type definition parsing
pass
def parse_match_statement(self) -> MatchStatement:
"""Parse match statement (stub)"""
# TODO: Implement match statement parsing
pass
def parse_spawn_statement(self) -> SpawnStatement:
"""Parse spawn statement (stub)"""
# TODO: Implement spawn statement parsing
pass
def parse(source: str, filename: str = "<stdin>") -> Program:
"""Convenience function to parse source code"""
tokens = lex(source, filename)
parser = Parser(tokens)
return parser.parse_program()
# Example usage
if __name__ == "__main__":
test_code = '''
let x: int = 42
let name = "BlackRoad"
fun greet(name: string) -> string:
return "Hello, {name}!"
space MyScene:
cube Box1:
position: vec3(0, 0, 0)
color: #FF1D6C
'''
ast = parse(test_code)
print("AST generated successfully!")
print(f"Program has {len(ast.statements)} statements")
for i, stmt in enumerate(ast.statements):
print(f"{i+1}. {stmt.__class__.__name__}")