Repository navigation
Expand file tree
/
Copy pathgenerate.py
More file actions
1202 lines (1036 loc) · 36.9 KB
/
Copy pathgenerate.py
File metadata and controls
1202 lines (1036 loc) · 36.9 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
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
#!/usr/bin/python
# /// script
# requires-python = ">=3.11"
# dependencies = []
#
# [tool.uv]
# exclude-newer = "P7D"
# ///
from __future__ import annotations
import re
from dataclasses import dataclass
from enum import Enum
from pathlib import Path
from subprocess import check_output
from typing import Any
import tomllib
# Types that require `crate::`. We can slowly remove these types as we move them to generate scripts.
types_requiring_crate_prefix = {
"IpyEscapeKind",
"ExprContext",
"Identifier",
"Number",
"BytesLiteralValue",
"StringLiteralValue",
"FStringValue",
"TStringValue",
"Arguments",
"CmpOp",
"Comprehension",
"DictItem",
"UnaryOp",
"BoolOp",
"Operator",
"Decorator",
"TypeParams",
"Parameters",
"ElifElseClause",
"WithItem",
"MatchCase",
"Alias",
"Singleton",
"PatternArguments",
"ConstantValue",
}
@dataclass
class VisitorInfo:
name: str
accepts_sequence: bool = False
# Map of AST node types to their corresponding visitor information.
# Only visitors that are different from the default `visit_*` method are included.
# These visitors either have a different name or accept a sequence of items.
type_to_visitor_function: dict[str, VisitorInfo] = {
"TypeParams": VisitorInfo("visit_type_params", True),
"Parameters": VisitorInfo("visit_parameters", True),
"Stmt": VisitorInfo("visit_body", True),
"Arguments": VisitorInfo("visit_arguments", True),
}
def rustfmt(code: str) -> str:
return check_output(["rustfmt", "--emit=stdout"], input=code, text=True)
def to_snake_case(node: str) -> str:
"""Converts CamelCase to snake_case"""
return re.sub("([A-Z])", r"_\1", node).lower().lstrip("_")
def write_rustdoc(out: list[str], doc: str) -> None:
for line in doc.split("\n"):
out.append(f"/// {line}")
# ------------------------------------------------------------------------------
# Read AST description
def load_ast(root: Path) -> Ast:
ast_path = root.joinpath("crates", "ruff_python_ast", "ast.toml")
with ast_path.open("rb") as ast_file:
ast = tomllib.load(ast_file)
return Ast(ast)
# ------------------------------------------------------------------------------
# Preprocess
@dataclass
class Ast:
"""
The parsed representation of the `ast.toml` file. Defines all of the Python
AST syntax nodes, and which groups (`Stmt`, `Expr`, etc.) they belong to.
"""
groups: list[Group]
ungrouped_nodes: list[Node]
all_nodes: list[Node]
def __init__(self, ast: dict[str, Any]) -> None:
self.groups = []
self.ungrouped_nodes = []
self.all_nodes = []
for group_name, group in ast.items():
group = Group(group_name, group)
self.all_nodes.extend(group.nodes)
if group_name == "ungrouped":
self.ungrouped_nodes = group.nodes
else:
self.groups.append(group)
@dataclass
class Group:
name: str
nodes: list[Node]
owned_enum_ty: str
add_suffix_to_is_methods: bool
anynode_is_label: str
doc: str | None
def __init__(self, group_name: str, group: dict[str, Any]) -> None:
self.name = group_name
self.owned_enum_ty = group_name
self.ref_enum_ty = group_name + "Ref"
self.add_suffix_to_is_methods = group.get("add_suffix_to_is_methods", False)
self.anynode_is_label = group.get("anynode_is_label", to_snake_case(group_name))
self.doc = group.get("doc")
self.nodes = [
Node(self, node_name, node) for node_name, node in group["nodes"].items()
]
@dataclass
class Node:
name: str
variant: str
ty: str
doc: str | None
fields: list[Field] | None
derives: list[str]
custom_debug: bool
custom_source_order: bool
custom_range: bool
source_order: list[str] | None
def __init__(self, group: Group, node_name: str, node: dict[str, Any]) -> None:
self.name = node_name
self.variant = node.get("variant", node_name.removeprefix(group.name))
self.ty = f"crate::{node_name}"
self.fields = None
fields = node.get("fields")
if fields is not None:
self.fields = [Field(f) for f in fields]
self.custom_debug = node.get("custom_debug", False)
self.custom_source_order = node.get("custom_source_order", False)
self.custom_range = node.get("custom_range", False)
self.derives = node.get("derives", [])
self.doc = node.get("doc")
self.source_order = node.get("source_order")
def fields_in_source_order(self) -> list[Field]:
if self.fields is None:
return []
if self.source_order is None:
return list(filter(lambda x: not x.skip_source_order(), self.fields))
fields = []
for field_name in self.source_order:
field = None
for field in self.fields:
if field.skip_source_order():
continue
if field.name == field_name:
field = field
break
fields.append(field)
return fields
@dataclass
class Field:
name: str
ty: str
_skip_visit: bool
is_annotation: bool
parsed_ty: FieldType
def __init__(self, field: dict[str, Any]) -> None:
self.name = field["name"]
self.ty = field["type"]
self.parsed_ty = FieldType(self.ty)
self._skip_visit = field.get("skip_visit", False)
self.is_annotation = field.get("is_annotation", False)
def skip_source_order(self) -> bool:
return self._skip_visit or self.parsed_ty.inner in [
"str",
"ExprContext",
"Name",
"u32",
"bool",
"Number",
"IpyEscapeKind",
]
# Extracts the type argument from a Rust type used in AST field syntax.
# Box<str> -> str
# Box<Expr> -> Expr
# If the type does not have a type argument, it will return the string.
# Does not support nested types
def extract_type_argument(rust_type_str: str) -> str:
open_bracket_index = rust_type_str.find("<")
if open_bracket_index == -1:
return rust_type_str
close_bracket_index = rust_type_str.rfind(">")
if close_bracket_index == -1 or close_bracket_index <= open_bracket_index:
raise ValueError(f"Brackets are not balanced for type {rust_type_str}")
inner_type = rust_type_str[open_bracket_index + 1 : close_bracket_index].strip()
inner_type = inner_type.replace("crate::", "")
return inner_type
class SequenceKind(Enum):
VEC = "vec"
BOXED_SLICE = "boxed_slice"
THIN_VEC = "thin_vec"
def split_sequence_type(rule: str) -> tuple[SequenceKind | None, str]:
if "&" in rule:
raise ValueError(f"`&T*` is unsupported; use `Box<[T]>`: {rule}")
if "*" in rule:
if rule.endswith("*") and rule.count("*") == 1:
return SequenceKind.VEC, rule[:-1]
raise ValueError(f"`*` must be at the end: {rule}")
for prefix, suffix, sequence_kind in (
("Vec<", ">", SequenceKind.VEC),
("ThinVec<", ">", SequenceKind.THIN_VEC),
("Box<[", "]>", SequenceKind.BOXED_SLICE),
):
if rule.startswith(prefix):
if not rule.endswith(suffix):
raise ValueError(f"Unclosed collection type: {rule}")
return sequence_kind, rule[len(prefix) : -len(suffix)]
return None, rule
@dataclass
class FieldType:
rule: str
name: str
inner: str
sequence_kind: SequenceKind | None = None
optional: bool = False
def __init__(self, rule: str) -> None:
self.rule = rule
self.optional = False
if "?" in rule:
if not rule.endswith("?") or rule.count("?") != 1:
raise ValueError(f"`?` must be at the end: {rule}")
self.optional = True
rule = rule[:-1]
self.sequence_kind, self.name = split_sequence_type(rule)
if self.optional and self.sequence_kind is not None and "<" not in rule:
raise ValueError(f"optional field cannot be sequence or slice: {self.rule}")
if self.sequence_kind is not None and (
not self.name or any(ch in self.name for ch in "?*&[]")
):
raise ValueError(f"Invalid collection element type: {rule}")
self.inner = extract_type_argument(self.name)
# ------------------------------------------------------------------------------
# Preamble
def write_preamble(out: list[str]) -> None:
out.append("""
// This is a generated file. Don't modify it by hand!
// Run `crates/ruff_python_ast/generate.py` to re-generate the file.
use crate::name::Name;
use crate::visitor::source_order::SourceOrderVisitor;
""")
# ------------------------------------------------------------------------------
# Owned enum
def write_owned_enum(out: list[str], ast: Ast) -> None:
"""
Create an enum for each group that contains an owned copy of a syntax node.
```rust
pub enum TypeParam {
TypeVar(TypeParamTypeVar),
TypeVarTuple(TypeParamTypeVarTuple),
...
}
```
Also creates:
- `impl Ranged for TypeParam`
- `impl HasNodeIndex for TypeParam`
- `TypeParam::visit_source_order`
- `impl From<TypeParamTypeVar> for TypeParam`
- `impl Ranged for TypeParamTypeVar`
- `impl HasNodeIndex for TypeParamTypeVar`
- `fn TypeParam::is_type_var() -> bool`
If the `add_suffix_to_is_methods` group option is true, then the
`is_type_var` method will be named `is_type_var_type_param`.
"""
for group in ast.groups:
out.append("")
if group.doc is not None:
write_rustdoc(out, group.doc)
out.append("#[derive(Clone, Debug, PartialEq)]")
out.append('#[cfg_attr(feature = "get-size", derive(get_size2::GetSize))]')
out.append(f"pub enum {group.owned_enum_ty} {{")
for node in group.nodes:
out.append(f"{node.variant}({node.ty}),")
out.append("}")
for node in group.nodes:
out.append(f"""
impl From<{node.ty}> for {group.owned_enum_ty} {{
fn from(node: {node.ty}) -> Self {{
Self::{node.variant}(node)
}}
}}
""")
out.append(f"""
impl ruff_text_size::Ranged for {group.owned_enum_ty} {{
fn range(&self) -> ruff_text_size::TextRange {{
match self {{
""")
for node in group.nodes:
out.append(f"Self::{node.variant}(node) => node.range(),")
out.append("""
}
}
}
""")
out.append(f"""
impl crate::HasNodeIndex for {group.owned_enum_ty} {{
fn node_index(&self) -> &crate::AtomicNodeIndex {{
match self {{
""")
for node in group.nodes:
out.append(f"Self::{node.variant}(node) => node.node_index(),")
out.append("""
}
}
}
""")
out.append(
"#[allow(dead_code, clippy::match_wildcard_for_single_variants)]"
) # Not all is_methods are used
out.append(f"impl {group.name} {{")
for node in group.nodes:
is_name = to_snake_case(node.variant)
variant_name = node.variant
match_arm = f"Self::{variant_name}"
if group.add_suffix_to_is_methods:
is_name = to_snake_case(node.variant + group.name)
if len(group.nodes) > 1:
out.append(f"""
#[inline]
pub const fn is_{is_name}(&self) -> bool {{
matches!(self, {match_arm}(_))
}}
#[inline]
pub fn {is_name}(self) -> Option<{node.ty}> {{
match self {{
{match_arm}(val) => Some(val),
_ => None,
}}
}}
#[inline]
pub fn expect_{is_name}(self) -> {node.ty} {{
match self {{
{match_arm}(val) => val,
_ => panic!("called expect on {{self:?}}"),
}}
}}
#[inline]
pub fn as_{is_name}_mut(&mut self) -> Option<&mut {node.ty}> {{
match self {{
{match_arm}(val) => Some(val),
_ => None,
}}
}}
#[inline]
pub fn as_{is_name}(&self) -> Option<&{node.ty}> {{
match self {{
{match_arm}(val) => Some(val),
_ => None,
}}
}}
""")
elif len(group.nodes) == 1:
out.append(f"""
#[inline]
pub const fn is_{is_name}(&self) -> bool {{
matches!(self, {match_arm}(_))
}}
#[inline]
pub fn {is_name}(self) -> Option<{node.ty}> {{
match self {{
{match_arm}(val) => Some(val),
}}
}}
#[inline]
pub fn expect_{is_name}(self) -> {node.ty} {{
match self {{
{match_arm}(val) => val,
}}
}}
#[inline]
pub fn as_{is_name}_mut(&mut self) -> Option<&mut {node.ty}> {{
match self {{
{match_arm}(val) => Some(val),
}}
}}
#[inline]
pub fn as_{is_name}(&self) -> Option<&{node.ty}> {{
match self {{
{match_arm}(val) => Some(val),
}}
}}
""")
out.append("}")
for node in ast.all_nodes:
if node.custom_range:
continue
out.append(f"""
impl ruff_text_size::Ranged for {node.ty} {{
fn range(&self) -> ruff_text_size::TextRange {{
self.range
}}
}}
""")
for node in ast.all_nodes:
out.append(f"""
impl crate::HasNodeIndex for {node.ty} {{
fn node_index(&self) -> &crate::AtomicNodeIndex {{
&self.node_index
}}
}}
""")
for group in ast.groups:
out.append(f"""
impl {group.owned_enum_ty} {{
#[allow(unused)]
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: crate::visitor::source_order::SourceOrderVisitor<'a> + ?Sized,
{{
match self {{
""")
for node in group.nodes:
out.append(
f"{group.owned_enum_ty}::{node.variant}(node) => node.visit_source_order(visitor),"
)
out.append("""
}
}
}
""")
# ------------------------------------------------------------------------------
# Ref enum
def write_ref_enum(out: list[str], ast: Ast) -> None:
"""
Create an enum for each group that contains a reference to a syntax node.
```rust
pub enum TypeParamRef<'a> {
TypeVar(&'a TypeParamTypeVar),
TypeVarTuple(&'a TypeParamTypeVarTuple),
...
}
```
Also creates:
- `impl<'a> From<&'a TypeParam> for TypeParamRef<'a>`
- `impl<'a> From<&'a TypeParamTypeVar> for TypeParamRef<'a>`
- `impl Ranged for TypeParamRef<'_>`
- `impl HasNodeIndex for TypeParamRef<'_>`
- `fn TypeParamRef::is_type_var() -> bool`
The name of each variant can be customized via the `variant` node option. If
the `add_suffix_to_is_methods` group option is true, then the `is_type_var`
method will be named `is_type_var_type_param`.
"""
for group in ast.groups:
out.append("")
if group.doc is not None:
write_rustdoc(out, group.doc)
out.append("""#[derive(Clone, Copy, Debug, PartialEq, is_macro::Is)]""")
out.append('#[cfg_attr(feature = "get-size", derive(get_size2::GetSize))]')
out.append(f"""pub enum {group.ref_enum_ty}<'a> {{""")
for node in group.nodes:
if group.add_suffix_to_is_methods:
is_name = to_snake_case(node.variant + group.name)
out.append(f'#[is(name = "{is_name}")]')
out.append(f"""{node.variant}(&'a {node.ty}),""")
out.append("}")
out.append(f"""
impl<'a> From<&'a {group.owned_enum_ty}> for {group.ref_enum_ty}<'a> {{
fn from(node: &'a {group.owned_enum_ty}) -> Self {{
match node {{
""")
for node in group.nodes:
out.append(
f"{group.owned_enum_ty}::{node.variant}(node) => {group.ref_enum_ty}::{node.variant}(node),"
)
out.append("""
}
}
}
""")
for node in group.nodes:
out.append(f"""
impl<'a> From<&'a {node.ty}> for {group.ref_enum_ty}<'a> {{
fn from(node: &'a {node.ty}) -> Self {{
Self::{node.variant}(node)
}}
}}
""")
out.append(f"""
impl ruff_text_size::Ranged for {group.ref_enum_ty}<'_> {{
fn range(&self) -> ruff_text_size::TextRange {{
match self {{
""")
for node in group.nodes:
out.append(f"Self::{node.variant}(node) => node.range(),")
out.append("""
}
}
}
""")
out.append(f"""
impl crate::HasNodeIndex for {group.ref_enum_ty}<'_> {{
fn node_index(&self) -> &crate::AtomicNodeIndex {{
match self {{
""")
for node in group.nodes:
out.append(f"Self::{node.variant}(node) => node.node_index(),")
out.append("""
}
}
}
""")
# ------------------------------------------------------------------------------
# AnyNodeRef
def write_anynoderef(out: list[str], ast: Ast) -> None:
"""
Create the AnyNodeRef type.
```rust
pub enum AnyNodeRef<'a> {
...
TypeParamTypeVar(&'a TypeParamTypeVar),
TypeParamTypeVarTuple(&'a TypeParamTypeVarTuple),
...
}
```
Also creates:
- `impl<'a> From<&'a TypeParam> for AnyNodeRef<'a>`
- `impl<'a> From<TypeParamRef<'a>> for AnyNodeRef<'a>`
- `impl<'a> From<&'a TypeParamTypeVarTuple> for AnyNodeRef<'a>`
- `impl Ranged for AnyNodeRef<'_>`
- `impl HasNodeIndex for AnyNodeRef<'_>`
- `fn AnyNodeRef::as_ptr(&self) -> std::ptr::NonNull<()>`
- `fn AnyNodeRef::visit_source_order(self, visitor &mut impl SourceOrderVisitor)`
"""
out.append("""
/// A flattened enumeration of all AST nodes.
#[derive(Copy, Clone, Debug, is_macro::Is, PartialEq)]
#[cfg_attr(feature = "get-size", derive(get_size2::GetSize))]
pub enum AnyNodeRef<'a> {
""")
for node in ast.all_nodes:
out.append(f"""{node.name}(&'a {node.ty}),""")
out.append("""
}
""")
for group in ast.groups:
out.append(f"""
impl<'a> From<&'a {group.owned_enum_ty}> for AnyNodeRef<'a> {{
fn from(node: &'a {group.owned_enum_ty}) -> AnyNodeRef<'a> {{
match node {{
""")
for node in group.nodes:
out.append(
f"{group.owned_enum_ty}::{node.variant}(node) => AnyNodeRef::{node.name}(node),"
)
out.append("""
}
}
}
""")
out.append(f"""
impl<'a> From<{group.ref_enum_ty}<'a>> for AnyNodeRef<'a> {{
fn from(node: {group.ref_enum_ty}<'a>) -> AnyNodeRef<'a> {{
match node {{
""")
for node in group.nodes:
out.append(
f"{group.ref_enum_ty}::{node.variant}(node) => AnyNodeRef::{node.name}(node),"
)
out.append("""
}
}
}
""")
# `as_*` methods to convert from `AnyNodeRef` to e.g. `ExprRef`
out.append(f"""
impl<'a> AnyNodeRef<'a> {{
pub fn as_{to_snake_case(group.ref_enum_ty)}(self) -> Option<{group.ref_enum_ty}<'a>> {{
match self {{
""")
for node in group.nodes:
out.append(
f"Self::{node.name}(node) => Some({group.ref_enum_ty}::{node.variant}(node)),"
)
out.append("""
_ => None,
}
}
}
""")
for node in ast.all_nodes:
out.append(f"""
impl<'a> From<&'a {node.ty}> for AnyNodeRef<'a> {{
fn from(node: &'a {node.ty}) -> AnyNodeRef<'a> {{
AnyNodeRef::{node.name}(node)
}}
}}
""")
out.append("""
impl ruff_text_size::Ranged for AnyNodeRef<'_> {
fn range(&self) -> ruff_text_size::TextRange {
match self {
""")
for node in ast.all_nodes:
out.append(f"""AnyNodeRef::{node.name}(node) => node.range(),""")
out.append("""
}
}
}
""")
out.append("""
impl crate::HasNodeIndex for AnyNodeRef<'_> {
fn node_index(&self) -> &crate::AtomicNodeIndex {
match self {
""")
for node in ast.all_nodes:
out.append(f"""AnyNodeRef::{node.name}(node) => node.node_index(),""")
out.append("""
}
}
}
""")
out.append("""
impl AnyNodeRef<'_> {
pub fn as_ptr(&self) -> std::ptr::NonNull<()> {
match self {
""")
for node in ast.all_nodes:
out.append(
f"AnyNodeRef::{node.name}(node) => std::ptr::NonNull::from(*node).cast(),"
)
out.append("""
}
}
}
""")
out.append("""
impl<'a> AnyNodeRef<'a> {
pub fn visit_source_order<'b, V>(self, visitor: &mut V)
where
V: crate::visitor::source_order::SourceOrderVisitor<'b> + ?Sized,
'a: 'b,
{
match self {
""")
for node in ast.all_nodes:
out.append(
f"AnyNodeRef::{node.name}(node) => node.visit_source_order(visitor),"
)
out.append("""
}
}
}
""")
for group in ast.groups:
out.append(f"""
impl AnyNodeRef<'_> {{
pub const fn is_{group.anynode_is_label}(self) -> bool {{
matches!(self,
""")
for i, node in enumerate(group.nodes):
if i > 0:
out.append("|")
out.append(f"""AnyNodeRef::{node.name}(_)""")
out.append("""
)
}
}
""")
# ------------------------------------------------------------------------------
# AnyRootNodeRef
def write_root_anynoderef(out: list[str], ast: Ast) -> None:
"""
Create the AnyRootNodeRef type.
```rust
pub enum AnyRootNodeRef<'a> {
...
TypeParam(&'a TypeParam),
...
}
```
Also creates:
- `impl<'a> From<&'a TypeParam> for AnyRootNodeRef<'a>`
- `impl<'a> TryFrom<AnyRootNodeRef<'a>> for &'a TypeParam`
- `impl<'a> TryFrom<AnyRootNodeRef<'a>> for &'a TypeParamVarTuple`
- `impl Ranged for AnyRootNodeRef<'_>`
- `impl HasNodeIndex for AnyRootNodeRef<'_>`
- `fn AnyRootNodeRef::visit_source_order(self, visitor &mut impl SourceOrderVisitor)`
"""
root_nodes = [(group.name, group.owned_enum_ty) for group in ast.groups]
root_nodes.extend((node.name, node.ty) for node in ast.ungrouped_nodes)
out.append("""
/// An enumeration of all AST nodes.
///
/// Unlike `AnyNodeRef`, this type does not flatten nested enums, so its variants only
/// consist of the "root" AST node types. This is useful as it exposes references to the
/// original enums, not just references to their inner values.
///
/// For example, `AnyRootNodeRef::Mod` contains a reference to the `Mod` enum, while
/// `AnyNodeRef` has top-level `AnyNodeRef::ModModule` and `AnyNodeRef::ModExpression`
/// variants.
#[derive(Copy, Clone, Debug, PartialEq)]
#[cfg_attr(feature = "get-size", derive(get_size2::GetSize))]
pub enum AnyRootNodeRef<'a> {
""")
for name, ty in root_nodes:
out.append(f"""{name}(&'a {ty}),""")
out.append("""
}
""")
out.append("""
/// The unflattened enum or struct type stored by an [`AnyRootNodeRef`].
///
/// Unlike [`NodeKind`], this does not distinguish variants of root enums such as [`Stmt`]
/// and [`Expr`].
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
#[cfg_attr(feature = "get-size", derive(get_size2::GetSize))]
#[repr(u8)]
pub enum RootNodeKind {
""")
for name, _ in root_nodes:
out.append(f"""{name},""")
out.append("""
}
impl RootNodeKind {
/// All root node kinds in discriminant order.
pub const ALL: &'static [Self] = &[
""")
for name, _ in root_nodes:
out.append(f"""Self::{name},""")
out.append("""
];
/// Returns the root node kind with the given discriminant.
#[inline]
pub fn from_u8(value: u8) -> Option<Self> {
match value {
""")
for index, (name, _) in enumerate(root_nodes):
out.append(f"""{index} => Some(Self::{name}),""")
out.append("""
_ => None,
}
}
}
""")
for group in ast.groups:
out.append(f"""
impl<'a> From<&'a {group.owned_enum_ty}> for AnyRootNodeRef<'a> {{
#[inline]
fn from(node: &'a {group.owned_enum_ty}) -> AnyRootNodeRef<'a> {{
AnyRootNodeRef::{group.name}(node)
}}
}}
""")
out.append(f"""
impl<'a> TryFrom<AnyRootNodeRef<'a>> for &'a {group.owned_enum_ty} {{
type Error = ();
fn try_from(node: AnyRootNodeRef<'a>) -> Result<&'a {group.owned_enum_ty}, ()> {{
match node {{
AnyRootNodeRef::{group.name}(node) => Ok(node),
_ => Err(())
}}
}}
}}
""")
for node in group.nodes:
out.append(f"""
impl<'a> TryFrom<AnyRootNodeRef<'a>> for &'a {node.ty} {{
type Error = ();
fn try_from(node: AnyRootNodeRef<'a>) -> Result<&'a {node.ty}, ()> {{
match node {{
AnyRootNodeRef::{group.name}({group.owned_enum_ty}::{node.variant}(node)) => Ok(node),
_ => Err(())
}}
}}
}}
""")
for node in ast.ungrouped_nodes:
out.append(f"""
impl<'a> From<&'a {node.ty}> for AnyRootNodeRef<'a> {{
#[inline]
fn from(node: &'a {node.ty}) -> AnyRootNodeRef<'a> {{
AnyRootNodeRef::{node.name}(node)
}}
}}
""")
out.append(f"""
impl<'a> TryFrom<AnyRootNodeRef<'a>> for &'a {node.ty} {{
type Error = ();
fn try_from(node: AnyRootNodeRef<'a>) -> Result<&'a {node.ty}, ()> {{
match node {{
AnyRootNodeRef::{node.name}(node) => Ok(node),
_ => Err(())
}}
}}
}}
""")
out.append("""
impl ruff_text_size::Ranged for AnyRootNodeRef<'_> {
fn range(&self) -> ruff_text_size::TextRange {
match self {
""")
for name, _ in root_nodes:
out.append(f"""AnyRootNodeRef::{name}(node) => node.range(),""")
out.append("""
}
}
}
""")
out.append("""
impl crate::HasNodeIndex for AnyRootNodeRef<'_> {
fn node_index(&self) -> &crate::AtomicNodeIndex {
match self {
""")
for name, _ in root_nodes:
out.append(f"""AnyRootNodeRef::{name}(node) => node.node_index(),""")
out.append("""
}
}
}
""")
out.append("""
impl<'a> AnyRootNodeRef<'a> {
/// Decomposes this reference into its root node kind and a type-erased pointer.
#[inline]
pub fn into_raw_parts(self) -> (RootNodeKind, std::ptr::NonNull<()>) {
match self {
""")
for name, _ in root_nodes:
out.append(
f"""AnyRootNodeRef::{name}(node) => (RootNodeKind::{name}, std::ptr::NonNull::from(node).cast()),"""
)
out.append("""
}
}
/// Reconstructs an AST reference from its root node kind and type-erased pointer.
///
/// # Safety
///
/// - `pointer` must be properly aligned for and point to the exact root node type
/// represented by `kind`.
/// - The pointer's provenance must permit reads of a complete, initialized, and valid
/// value of that type.
/// - The pointed-to value must not be moved, dropped, or accessed mutably for `'a`.
#[inline]
#[expect(unsafe_code, reason = "reconstructs a type-erased AST reference")]
pub unsafe fn from_raw_parts(kind: RootNodeKind, pointer: std::ptr::NonNull<()>) -> Self {
let pointer = pointer.as_ptr();
// SAFETY: The caller guarantees that `pointer` is readable as the exact root node
// type selected by `kind` and remains valid and immutable for `'a`.
unsafe { match kind {
""")
for name, ty in root_nodes:
out.append(
f"""RootNodeKind::{name} => AnyRootNodeRef::{name}(&*pointer.cast::<{ty}>()),"""
)
out.append("""
}}
}
pub fn visit_source_order<'b, V>(self, visitor: &mut V)
where
V: crate::visitor::source_order::SourceOrderVisitor<'b> + ?Sized,
'a: 'b,
{
match self {
""")
for name, _ in root_nodes:
out.append(
f"""AnyRootNodeRef::{name}(node) => node.visit_source_order(visitor),"""
)
out.append("""
}
}
}
""")
# ------------------------------------------------------------------------------