1pub use rustc_ast_ir::visit::VisitorResult;
17pub use rustc_ast_ir::{try_visit, visit_opt, walk_list, walk_visitable_list};
18use rustc_span::{Ident, Span};
19use thin_vec::ThinVec;
20
21use crate::ast::*;
22use crate::ptr::P;
23
24#[derive(Copy, Clone, Debug, PartialEq)]
25pub enum AssocCtxt {
26 Trait,
27 Impl { of_trait: bool },
28}
29
30#[derive(Copy, Clone, Debug, PartialEq)]
31pub enum FnCtxt {
32 Free,
33 Foreign,
34 Assoc(AssocCtxt),
35}
36
37#[derive(Copy, Clone, Debug)]
38pub enum BoundKind {
39 Bound,
42
43 Impl,
46
47 TraitObject,
50
51 SuperTraits,
54}
55impl BoundKind {
56 pub fn descr(self) -> &'static str {
57 match self {
58 BoundKind::Bound => "bounds",
59 BoundKind::Impl => "`impl Trait`",
60 BoundKind::TraitObject => "`dyn` trait object bounds",
61 BoundKind::SuperTraits => "supertrait bounds",
62 }
63 }
64}
65
66#[derive(Copy, Clone, Debug)]
67pub enum FnKind<'a> {
68 Fn(FnCtxt, &'a Visibility, &'a Fn),
70
71 Closure(&'a ClosureBinder, &'a Option<CoroutineKind>, &'a FnDecl, &'a Expr),
73}
74
75impl<'a> FnKind<'a> {
76 pub fn header(&self) -> Option<&'a FnHeader> {
77 match *self {
78 FnKind::Fn(_, _, Fn { sig, .. }) => Some(&sig.header),
79 FnKind::Closure(..) => None,
80 }
81 }
82
83 pub fn ident(&self) -> Option<&Ident> {
84 match self {
85 FnKind::Fn(_, _, Fn { ident, .. }) => Some(ident),
86 _ => None,
87 }
88 }
89
90 pub fn decl(&self) -> &'a FnDecl {
91 match self {
92 FnKind::Fn(_, _, Fn { sig, .. }) => &sig.decl,
93 FnKind::Closure(_, _, decl, _) => decl,
94 }
95 }
96
97 pub fn ctxt(&self) -> Option<FnCtxt> {
98 match self {
99 FnKind::Fn(ctxt, ..) => Some(*ctxt),
100 FnKind::Closure(..) => None,
101 }
102 }
103}
104
105#[derive(Copy, Clone, Debug)]
106pub enum LifetimeCtxt {
107 Ref,
109 Bound,
111 GenericArg,
113}
114
115pub trait WalkItemKind {
116 type Ctxt;
117 fn walk<'a, V: Visitor<'a>>(
118 &'a self,
119 span: Span,
120 id: NodeId,
121 visibility: &'a Visibility,
122 ctxt: Self::Ctxt,
123 visitor: &mut V,
124 ) -> V::Result;
125}
126
127pub trait Visitor<'ast>: Sized {
137 type Result: VisitorResult = ();
140
141 fn visit_ident(&mut self, _ident: &'ast Ident) -> Self::Result {
142 Self::Result::output()
143 }
144 fn visit_foreign_item(&mut self, i: &'ast ForeignItem) -> Self::Result {
145 walk_item(self, i)
146 }
147 fn visit_item(&mut self, i: &'ast Item) -> Self::Result {
148 walk_item(self, i)
149 }
150 fn visit_local(&mut self, l: &'ast Local) -> Self::Result {
151 walk_local(self, l)
152 }
153 fn visit_block(&mut self, b: &'ast Block) -> Self::Result {
154 walk_block(self, b)
155 }
156 fn visit_stmt(&mut self, s: &'ast Stmt) -> Self::Result {
157 walk_stmt(self, s)
158 }
159 fn visit_param(&mut self, param: &'ast Param) -> Self::Result {
160 walk_param(self, param)
161 }
162 fn visit_arm(&mut self, a: &'ast Arm) -> Self::Result {
163 walk_arm(self, a)
164 }
165 fn visit_pat(&mut self, p: &'ast Pat) -> Self::Result {
166 walk_pat(self, p)
167 }
168 fn visit_anon_const(&mut self, c: &'ast AnonConst) -> Self::Result {
169 walk_anon_const(self, c)
170 }
171 fn visit_expr(&mut self, ex: &'ast Expr) -> Self::Result {
172 walk_expr(self, ex)
173 }
174 fn visit_method_receiver_expr(&mut self, ex: &'ast Expr) -> Self::Result {
177 self.visit_expr(ex)
178 }
179 fn visit_ty(&mut self, t: &'ast Ty) -> Self::Result {
180 walk_ty(self, t)
181 }
182 fn visit_ty_pat(&mut self, t: &'ast TyPat) -> Self::Result {
183 walk_ty_pat(self, t)
184 }
185 fn visit_generic_param(&mut self, param: &'ast GenericParam) -> Self::Result {
186 walk_generic_param(self, param)
187 }
188 fn visit_generics(&mut self, g: &'ast Generics) -> Self::Result {
189 walk_generics(self, g)
190 }
191 fn visit_closure_binder(&mut self, b: &'ast ClosureBinder) -> Self::Result {
192 walk_closure_binder(self, b)
193 }
194 fn visit_contract(&mut self, c: &'ast FnContract) -> Self::Result {
195 walk_contract(self, c)
196 }
197 fn visit_where_predicate(&mut self, p: &'ast WherePredicate) -> Self::Result {
198 walk_where_predicate(self, p)
199 }
200 fn visit_where_predicate_kind(&mut self, k: &'ast WherePredicateKind) -> Self::Result {
201 walk_where_predicate_kind(self, k)
202 }
203 fn visit_fn(&mut self, fk: FnKind<'ast>, _: Span, _: NodeId) -> Self::Result {
204 walk_fn(self, fk)
205 }
206 fn visit_assoc_item(&mut self, i: &'ast AssocItem, ctxt: AssocCtxt) -> Self::Result {
207 walk_assoc_item(self, i, ctxt)
208 }
209 fn visit_trait_ref(&mut self, t: &'ast TraitRef) -> Self::Result {
210 walk_trait_ref(self, t)
211 }
212 fn visit_param_bound(&mut self, bounds: &'ast GenericBound, _ctxt: BoundKind) -> Self::Result {
213 walk_param_bound(self, bounds)
214 }
215 fn visit_precise_capturing_arg(&mut self, arg: &'ast PreciseCapturingArg) -> Self::Result {
216 walk_precise_capturing_arg(self, arg)
217 }
218 fn visit_poly_trait_ref(&mut self, t: &'ast PolyTraitRef) -> Self::Result {
219 walk_poly_trait_ref(self, t)
220 }
221 fn visit_variant_data(&mut self, s: &'ast VariantData) -> Self::Result {
222 walk_struct_def(self, s)
223 }
224 fn visit_field_def(&mut self, s: &'ast FieldDef) -> Self::Result {
225 walk_field_def(self, s)
226 }
227 fn visit_enum_def(&mut self, enum_definition: &'ast EnumDef) -> Self::Result {
228 walk_enum_def(self, enum_definition)
229 }
230 fn visit_variant(&mut self, v: &'ast Variant) -> Self::Result {
231 walk_variant(self, v)
232 }
233 fn visit_variant_discr(&mut self, discr: &'ast AnonConst) -> Self::Result {
234 self.visit_anon_const(discr)
235 }
236 fn visit_label(&mut self, label: &'ast Label) -> Self::Result {
237 walk_label(self, label)
238 }
239 fn visit_lifetime(&mut self, lifetime: &'ast Lifetime, _: LifetimeCtxt) -> Self::Result {
240 walk_lifetime(self, lifetime)
241 }
242 fn visit_mac_call(&mut self, mac: &'ast MacCall) -> Self::Result {
243 walk_mac(self, mac)
244 }
245 fn visit_mac_def(&mut self, _mac: &'ast MacroDef, _id: NodeId) -> Self::Result {
246 Self::Result::output()
247 }
248 fn visit_path(&mut self, path: &'ast Path, _id: NodeId) -> Self::Result {
249 walk_path(self, path)
250 }
251 fn visit_use_tree(
252 &mut self,
253 use_tree: &'ast UseTree,
254 id: NodeId,
255 _nested: bool,
256 ) -> Self::Result {
257 walk_use_tree(self, use_tree, id)
258 }
259 fn visit_path_segment(&mut self, path_segment: &'ast PathSegment) -> Self::Result {
260 walk_path_segment(self, path_segment)
261 }
262 fn visit_generic_args(&mut self, generic_args: &'ast GenericArgs) -> Self::Result {
263 walk_generic_args(self, generic_args)
264 }
265 fn visit_generic_arg(&mut self, generic_arg: &'ast GenericArg) -> Self::Result {
266 walk_generic_arg(self, generic_arg)
267 }
268 fn visit_assoc_item_constraint(
269 &mut self,
270 constraint: &'ast AssocItemConstraint,
271 ) -> Self::Result {
272 walk_assoc_item_constraint(self, constraint)
273 }
274 fn visit_attribute(&mut self, attr: &'ast Attribute) -> Self::Result {
275 walk_attribute(self, attr)
276 }
277 fn visit_vis(&mut self, vis: &'ast Visibility) -> Self::Result {
278 walk_vis(self, vis)
279 }
280 fn visit_fn_ret_ty(&mut self, ret_ty: &'ast FnRetTy) -> Self::Result {
281 walk_fn_ret_ty(self, ret_ty)
282 }
283 fn visit_fn_header(&mut self, header: &'ast FnHeader) -> Self::Result {
284 walk_fn_header(self, header)
285 }
286 fn visit_expr_field(&mut self, f: &'ast ExprField) -> Self::Result {
287 walk_expr_field(self, f)
288 }
289 fn visit_pat_field(&mut self, fp: &'ast PatField) -> Self::Result {
290 walk_pat_field(self, fp)
291 }
292 fn visit_crate(&mut self, krate: &'ast Crate) -> Self::Result {
293 walk_crate(self, krate)
294 }
295 fn visit_inline_asm(&mut self, asm: &'ast InlineAsm) -> Self::Result {
296 walk_inline_asm(self, asm)
297 }
298 fn visit_format_args(&mut self, fmt: &'ast FormatArgs) -> Self::Result {
299 walk_format_args(self, fmt)
300 }
301 fn visit_inline_asm_sym(&mut self, sym: &'ast InlineAsmSym) -> Self::Result {
302 walk_inline_asm_sym(self, sym)
303 }
304 fn visit_capture_by(&mut self, _capture_by: &'ast CaptureBy) -> Self::Result {
305 Self::Result::output()
306 }
307 fn visit_coroutine_kind(&mut self, _coroutine_kind: &'ast CoroutineKind) -> Self::Result {
308 Self::Result::output()
309 }
310 fn visit_fn_decl(&mut self, fn_decl: &'ast FnDecl) -> Self::Result {
311 walk_fn_decl(self, fn_decl)
312 }
313 fn visit_qself(&mut self, qs: &'ast Option<P<QSelf>>) -> Self::Result {
314 walk_qself(self, qs)
315 }
316}
317
318pub fn walk_crate<'a, V: Visitor<'a>>(visitor: &mut V, krate: &'a Crate) -> V::Result {
319 let Crate { attrs, items, spans: _, id: _, is_placeholder: _ } = krate;
320 walk_list!(visitor, visit_attribute, attrs);
321 walk_list!(visitor, visit_item, items);
322 V::Result::output()
323}
324
325pub fn walk_local<'a, V: Visitor<'a>>(visitor: &mut V, local: &'a Local) -> V::Result {
326 let Local { id: _, super_: _, pat, ty, kind, span: _, colon_sp: _, attrs, tokens: _ } = local;
327 walk_list!(visitor, visit_attribute, attrs);
328 try_visit!(visitor.visit_pat(pat));
329 visit_opt!(visitor, visit_ty, ty);
330 if let Some((init, els)) = kind.init_else_opt() {
331 try_visit!(visitor.visit_expr(init));
332 visit_opt!(visitor, visit_block, els);
333 }
334 V::Result::output()
335}
336
337pub fn walk_label<'a, V: Visitor<'a>>(visitor: &mut V, Label { ident }: &'a Label) -> V::Result {
338 visitor.visit_ident(ident)
339}
340
341pub fn walk_lifetime<'a, V: Visitor<'a>>(visitor: &mut V, lifetime: &'a Lifetime) -> V::Result {
342 let Lifetime { id: _, ident } = lifetime;
343 visitor.visit_ident(ident)
344}
345
346pub fn walk_poly_trait_ref<'a, V>(visitor: &mut V, trait_ref: &'a PolyTraitRef) -> V::Result
347where
348 V: Visitor<'a>,
349{
350 let PolyTraitRef { bound_generic_params, modifiers: _, trait_ref, span: _ } = trait_ref;
351 walk_list!(visitor, visit_generic_param, bound_generic_params);
352 visitor.visit_trait_ref(trait_ref)
353}
354
355pub fn walk_trait_ref<'a, V: Visitor<'a>>(visitor: &mut V, trait_ref: &'a TraitRef) -> V::Result {
356 let TraitRef { path, ref_id } = trait_ref;
357 visitor.visit_path(path, *ref_id)
358}
359
360impl WalkItemKind for ItemKind {
361 type Ctxt = ();
362 fn walk<'a, V: Visitor<'a>>(
363 &'a self,
364 span: Span,
365 id: NodeId,
366 vis: &'a Visibility,
367 _ctxt: Self::Ctxt,
368 visitor: &mut V,
369 ) -> V::Result {
370 match self {
371 ItemKind::ExternCrate(_rename, ident) => try_visit!(visitor.visit_ident(ident)),
372 ItemKind::Use(use_tree) => try_visit!(visitor.visit_use_tree(use_tree, id, false)),
373 ItemKind::Static(box StaticItem {
374 ident,
375 ty,
376 safety: _,
377 mutability: _,
378 expr,
379 define_opaque,
380 }) => {
381 try_visit!(visitor.visit_ident(ident));
382 try_visit!(visitor.visit_ty(ty));
383 visit_opt!(visitor, visit_expr, expr);
384 try_visit!(walk_define_opaques(visitor, define_opaque));
385 }
386 ItemKind::Const(box ConstItem {
387 defaultness: _,
388 ident,
389 generics,
390 ty,
391 expr,
392 define_opaque,
393 }) => {
394 try_visit!(visitor.visit_ident(ident));
395 try_visit!(visitor.visit_generics(generics));
396 try_visit!(visitor.visit_ty(ty));
397 visit_opt!(visitor, visit_expr, expr);
398 try_visit!(walk_define_opaques(visitor, define_opaque));
399 }
400 ItemKind::Fn(func) => {
401 let kind = FnKind::Fn(FnCtxt::Free, vis, &*func);
402 try_visit!(visitor.visit_fn(kind, span, id));
403 }
404 ItemKind::Mod(_unsafety, ident, mod_kind) => {
405 try_visit!(visitor.visit_ident(ident));
406 match mod_kind {
407 ModKind::Loaded(items, _inline, _inner_span, _) => {
408 walk_list!(visitor, visit_item, items);
409 }
410 ModKind::Unloaded => {}
411 }
412 }
413 ItemKind::ForeignMod(ForeignMod { extern_span: _, safety: _, abi: _, items }) => {
414 walk_list!(visitor, visit_foreign_item, items);
415 }
416 ItemKind::GlobalAsm(asm) => try_visit!(visitor.visit_inline_asm(asm)),
417 ItemKind::TyAlias(box TyAlias {
418 generics,
419 ident,
420 bounds,
421 ty,
422 defaultness: _,
423 where_clauses: _,
424 }) => {
425 try_visit!(visitor.visit_ident(ident));
426 try_visit!(visitor.visit_generics(generics));
427 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
428 visit_opt!(visitor, visit_ty, ty);
429 }
430 ItemKind::Enum(ident, enum_definition, generics) => {
431 try_visit!(visitor.visit_ident(ident));
432 try_visit!(visitor.visit_generics(generics));
433 try_visit!(visitor.visit_enum_def(enum_definition));
434 }
435 ItemKind::Impl(box Impl {
436 defaultness: _,
437 safety: _,
438 generics,
439 constness: _,
440 polarity: _,
441 of_trait,
442 self_ty,
443 items,
444 }) => {
445 try_visit!(visitor.visit_generics(generics));
446 visit_opt!(visitor, visit_trait_ref, of_trait);
447 try_visit!(visitor.visit_ty(self_ty));
448 walk_list!(
449 visitor,
450 visit_assoc_item,
451 items,
452 AssocCtxt::Impl { of_trait: of_trait.is_some() }
453 );
454 }
455 ItemKind::Struct(ident, struct_definition, generics)
456 | ItemKind::Union(ident, struct_definition, generics) => {
457 try_visit!(visitor.visit_ident(ident));
458 try_visit!(visitor.visit_generics(generics));
459 try_visit!(visitor.visit_variant_data(struct_definition));
460 }
461 ItemKind::Trait(box Trait {
462 safety: _,
463 is_auto: _,
464 ident,
465 generics,
466 bounds,
467 items,
468 }) => {
469 try_visit!(visitor.visit_ident(ident));
470 try_visit!(visitor.visit_generics(generics));
471 walk_list!(visitor, visit_param_bound, bounds, BoundKind::SuperTraits);
472 walk_list!(visitor, visit_assoc_item, items, AssocCtxt::Trait);
473 }
474 ItemKind::TraitAlias(ident, generics, bounds) => {
475 try_visit!(visitor.visit_ident(ident));
476 try_visit!(visitor.visit_generics(generics));
477 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
478 }
479 ItemKind::MacCall(mac) => try_visit!(visitor.visit_mac_call(mac)),
480 ItemKind::MacroDef(ident, ts) => {
481 try_visit!(visitor.visit_ident(ident));
482 try_visit!(visitor.visit_mac_def(ts, id))
483 }
484 ItemKind::Delegation(box Delegation {
485 id,
486 qself,
487 path,
488 ident,
489 rename,
490 body,
491 from_glob: _,
492 }) => {
493 try_visit!(visitor.visit_qself(qself));
494 try_visit!(visitor.visit_path(path, *id));
495 try_visit!(visitor.visit_ident(ident));
496 visit_opt!(visitor, visit_ident, rename);
497 visit_opt!(visitor, visit_block, body);
498 }
499 ItemKind::DelegationMac(box DelegationMac { qself, prefix, suffixes, body }) => {
500 try_visit!(visitor.visit_qself(qself));
501 try_visit!(visitor.visit_path(prefix, id));
502 if let Some(suffixes) = suffixes {
503 for (ident, rename) in suffixes {
504 visitor.visit_ident(ident);
505 if let Some(rename) = rename {
506 visitor.visit_ident(rename);
507 }
508 }
509 }
510 visit_opt!(visitor, visit_block, body);
511 }
512 }
513 V::Result::output()
514 }
515}
516
517pub fn walk_enum_def<'a, V: Visitor<'a>>(
518 visitor: &mut V,
519 EnumDef { variants }: &'a EnumDef,
520) -> V::Result {
521 walk_list!(visitor, visit_variant, variants);
522 V::Result::output()
523}
524
525pub fn walk_variant<'a, V: Visitor<'a>>(visitor: &mut V, variant: &'a Variant) -> V::Result
526where
527 V: Visitor<'a>,
528{
529 let Variant { attrs, id: _, span: _, vis, ident, data, disr_expr, is_placeholder: _ } = variant;
530 walk_list!(visitor, visit_attribute, attrs);
531 try_visit!(visitor.visit_vis(vis));
532 try_visit!(visitor.visit_ident(ident));
533 try_visit!(visitor.visit_variant_data(data));
534 visit_opt!(visitor, visit_variant_discr, disr_expr);
535 V::Result::output()
536}
537
538pub fn walk_expr_field<'a, V: Visitor<'a>>(visitor: &mut V, f: &'a ExprField) -> V::Result {
539 let ExprField { attrs, id: _, span: _, ident, expr, is_shorthand: _, is_placeholder: _ } = f;
540 walk_list!(visitor, visit_attribute, attrs);
541 try_visit!(visitor.visit_ident(ident));
542 try_visit!(visitor.visit_expr(expr));
543 V::Result::output()
544}
545
546pub fn walk_pat_field<'a, V: Visitor<'a>>(visitor: &mut V, fp: &'a PatField) -> V::Result {
547 let PatField { ident, pat, is_shorthand: _, attrs, id: _, span: _, is_placeholder: _ } = fp;
548 walk_list!(visitor, visit_attribute, attrs);
549 try_visit!(visitor.visit_ident(ident));
550 try_visit!(visitor.visit_pat(pat));
551 V::Result::output()
552}
553
554pub fn walk_ty<'a, V: Visitor<'a>>(visitor: &mut V, typ: &'a Ty) -> V::Result {
555 let Ty { id, kind, span: _, tokens: _ } = typ;
556 match kind {
557 TyKind::Slice(ty) | TyKind::Paren(ty) => try_visit!(visitor.visit_ty(ty)),
558 TyKind::Ptr(MutTy { ty, mutbl: _ }) => try_visit!(visitor.visit_ty(ty)),
559 TyKind::Ref(opt_lifetime, MutTy { ty, mutbl: _ })
560 | TyKind::PinnedRef(opt_lifetime, MutTy { ty, mutbl: _ }) => {
561 visit_opt!(visitor, visit_lifetime, opt_lifetime, LifetimeCtxt::Ref);
562 try_visit!(visitor.visit_ty(ty));
563 }
564 TyKind::Tup(tuple_element_types) => {
565 walk_list!(visitor, visit_ty, tuple_element_types);
566 }
567 TyKind::BareFn(function_declaration) => {
568 let BareFnTy { safety: _, ext: _, generic_params, decl, decl_span: _ } =
569 &**function_declaration;
570 walk_list!(visitor, visit_generic_param, generic_params);
571 try_visit!(visitor.visit_fn_decl(decl));
572 }
573 TyKind::UnsafeBinder(binder) => {
574 walk_list!(visitor, visit_generic_param, &binder.generic_params);
575 try_visit!(visitor.visit_ty(&binder.inner_ty));
576 }
577 TyKind::Path(maybe_qself, path) => {
578 try_visit!(visitor.visit_qself(maybe_qself));
579 try_visit!(visitor.visit_path(path, *id));
580 }
581 TyKind::Pat(ty, pat) => {
582 try_visit!(visitor.visit_ty(ty));
583 try_visit!(visitor.visit_ty_pat(pat));
584 }
585 TyKind::Array(ty, length) => {
586 try_visit!(visitor.visit_ty(ty));
587 try_visit!(visitor.visit_anon_const(length));
588 }
589 TyKind::TraitObject(bounds, _syntax) => {
590 walk_list!(visitor, visit_param_bound, bounds, BoundKind::TraitObject);
591 }
592 TyKind::ImplTrait(_id, bounds) => {
593 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Impl);
594 }
595 TyKind::Typeof(expression) => try_visit!(visitor.visit_anon_const(expression)),
596 TyKind::Infer | TyKind::ImplicitSelf | TyKind::Dummy => {}
597 TyKind::Err(_guar) => {}
598 TyKind::MacCall(mac) => try_visit!(visitor.visit_mac_call(mac)),
599 TyKind::Never | TyKind::CVarArgs => {}
600 }
601 V::Result::output()
602}
603
604pub fn walk_ty_pat<'a, V: Visitor<'a>>(visitor: &mut V, tp: &'a TyPat) -> V::Result {
605 let TyPat { id: _, kind, span: _, tokens: _ } = tp;
606 match kind {
607 TyPatKind::Range(start, end, _include_end) => {
608 visit_opt!(visitor, visit_anon_const, start);
609 visit_opt!(visitor, visit_anon_const, end);
610 }
611 TyPatKind::Err(_) => {}
612 }
613 V::Result::output()
614}
615
616fn walk_qself<'a, V: Visitor<'a>>(visitor: &mut V, qself: &'a Option<P<QSelf>>) -> V::Result {
617 if let Some(qself) = qself {
618 let QSelf { ty, path_span: _, position: _ } = &**qself;
619 try_visit!(visitor.visit_ty(ty));
620 }
621 V::Result::output()
622}
623
624pub fn walk_path<'a, V: Visitor<'a>>(visitor: &mut V, path: &'a Path) -> V::Result {
625 let Path { span: _, segments, tokens: _ } = path;
626 walk_list!(visitor, visit_path_segment, segments);
627 V::Result::output()
628}
629
630pub fn walk_use_tree<'a, V: Visitor<'a>>(
631 visitor: &mut V,
632 use_tree: &'a UseTree,
633 id: NodeId,
634) -> V::Result {
635 let UseTree { prefix, kind, span: _ } = use_tree;
636 try_visit!(visitor.visit_path(prefix, id));
637 match kind {
638 UseTreeKind::Simple(rename) => {
639 visit_opt!(visitor, visit_ident, rename);
641 }
642 UseTreeKind::Glob => {}
643 UseTreeKind::Nested { items, span: _ } => {
644 for &(ref nested_tree, nested_id) in items {
645 try_visit!(visitor.visit_use_tree(nested_tree, nested_id, true));
646 }
647 }
648 }
649 V::Result::output()
650}
651
652pub fn walk_path_segment<'a, V: Visitor<'a>>(
653 visitor: &mut V,
654 segment: &'a PathSegment,
655) -> V::Result {
656 let PathSegment { ident, id: _, args } = segment;
657 try_visit!(visitor.visit_ident(ident));
658 visit_opt!(visitor, visit_generic_args, args);
659 V::Result::output()
660}
661
662pub fn walk_generic_args<'a, V>(visitor: &mut V, generic_args: &'a GenericArgs) -> V::Result
663where
664 V: Visitor<'a>,
665{
666 match generic_args {
667 GenericArgs::AngleBracketed(AngleBracketedArgs { span: _, args }) => {
668 for arg in args {
669 match arg {
670 AngleBracketedArg::Arg(a) => try_visit!(visitor.visit_generic_arg(a)),
671 AngleBracketedArg::Constraint(c) => {
672 try_visit!(visitor.visit_assoc_item_constraint(c))
673 }
674 }
675 }
676 }
677 GenericArgs::Parenthesized(data) => {
678 let ParenthesizedArgs { span: _, inputs, inputs_span: _, output } = data;
679 walk_list!(visitor, visit_ty, inputs);
680 try_visit!(visitor.visit_fn_ret_ty(output));
681 }
682 GenericArgs::ParenthesizedElided(_span) => {}
683 }
684 V::Result::output()
685}
686
687pub fn walk_generic_arg<'a, V>(visitor: &mut V, generic_arg: &'a GenericArg) -> V::Result
688where
689 V: Visitor<'a>,
690{
691 match generic_arg {
692 GenericArg::Lifetime(lt) => visitor.visit_lifetime(lt, LifetimeCtxt::GenericArg),
693 GenericArg::Type(ty) => visitor.visit_ty(ty),
694 GenericArg::Const(ct) => visitor.visit_anon_const(ct),
695 }
696}
697
698pub fn walk_assoc_item_constraint<'a, V: Visitor<'a>>(
699 visitor: &mut V,
700 constraint: &'a AssocItemConstraint,
701) -> V::Result {
702 let AssocItemConstraint { id: _, ident, gen_args, kind, span: _ } = constraint;
703 try_visit!(visitor.visit_ident(ident));
704 visit_opt!(visitor, visit_generic_args, gen_args);
705 match kind {
706 AssocItemConstraintKind::Equality { term } => match term {
707 Term::Ty(ty) => try_visit!(visitor.visit_ty(ty)),
708 Term::Const(c) => try_visit!(visitor.visit_anon_const(c)),
709 },
710 AssocItemConstraintKind::Bound { bounds } => {
711 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
712 }
713 }
714 V::Result::output()
715}
716
717pub fn walk_pat<'a, V: Visitor<'a>>(visitor: &mut V, pattern: &'a Pat) -> V::Result {
718 let Pat { id, kind, span: _, tokens: _ } = pattern;
719 match kind {
720 PatKind::TupleStruct(opt_qself, path, elems) => {
721 try_visit!(visitor.visit_qself(opt_qself));
722 try_visit!(visitor.visit_path(path, *id));
723 walk_list!(visitor, visit_pat, elems);
724 }
725 PatKind::Path(opt_qself, path) => {
726 try_visit!(visitor.visit_qself(opt_qself));
727 try_visit!(visitor.visit_path(path, *id))
728 }
729 PatKind::Struct(opt_qself, path, fields, _rest) => {
730 try_visit!(visitor.visit_qself(opt_qself));
731 try_visit!(visitor.visit_path(path, *id));
732 walk_list!(visitor, visit_pat_field, fields);
733 }
734 PatKind::Box(subpattern) | PatKind::Deref(subpattern) | PatKind::Paren(subpattern) => {
735 try_visit!(visitor.visit_pat(subpattern));
736 }
737 PatKind::Ref(subpattern, _ ) => {
738 try_visit!(visitor.visit_pat(subpattern));
739 }
740 PatKind::Ident(_bmode, ident, optional_subpattern) => {
741 try_visit!(visitor.visit_ident(ident));
742 visit_opt!(visitor, visit_pat, optional_subpattern);
743 }
744 PatKind::Expr(expression) => try_visit!(visitor.visit_expr(expression)),
745 PatKind::Range(lower_bound, upper_bound, _end) => {
746 visit_opt!(visitor, visit_expr, lower_bound);
747 visit_opt!(visitor, visit_expr, upper_bound);
748 }
749 PatKind::Guard(subpattern, guard_condition) => {
750 try_visit!(visitor.visit_pat(subpattern));
751 try_visit!(visitor.visit_expr(guard_condition));
752 }
753 PatKind::Missing | PatKind::Wild | PatKind::Rest | PatKind::Never => {}
754 PatKind::Err(_guar) => {}
755 PatKind::Tuple(elems) | PatKind::Slice(elems) | PatKind::Or(elems) => {
756 walk_list!(visitor, visit_pat, elems);
757 }
758 PatKind::MacCall(mac) => try_visit!(visitor.visit_mac_call(mac)),
759 }
760 V::Result::output()
761}
762
763impl WalkItemKind for ForeignItemKind {
764 type Ctxt = ();
765 fn walk<'a, V: Visitor<'a>>(
766 &'a self,
767 span: Span,
768 id: NodeId,
769 vis: &'a Visibility,
770 _ctxt: Self::Ctxt,
771 visitor: &mut V,
772 ) -> V::Result {
773 match self {
774 ForeignItemKind::Static(box StaticItem {
775 ident,
776 ty,
777 mutability: _,
778 expr,
779 safety: _,
780 define_opaque,
781 }) => {
782 try_visit!(visitor.visit_ident(ident));
783 try_visit!(visitor.visit_ty(ty));
784 visit_opt!(visitor, visit_expr, expr);
785 try_visit!(walk_define_opaques(visitor, define_opaque));
786 }
787 ForeignItemKind::Fn(func) => {
788 let kind = FnKind::Fn(FnCtxt::Foreign, vis, &*func);
789 try_visit!(visitor.visit_fn(kind, span, id));
790 }
791 ForeignItemKind::TyAlias(box TyAlias {
792 generics,
793 ident,
794 bounds,
795 ty,
796 defaultness: _,
797 where_clauses: _,
798 }) => {
799 try_visit!(visitor.visit_ident(ident));
800 try_visit!(visitor.visit_generics(generics));
801 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
802 visit_opt!(visitor, visit_ty, ty);
803 }
804 ForeignItemKind::MacCall(mac) => {
805 try_visit!(visitor.visit_mac_call(mac));
806 }
807 }
808 V::Result::output()
809 }
810}
811
812pub fn walk_param_bound<'a, V: Visitor<'a>>(visitor: &mut V, bound: &'a GenericBound) -> V::Result {
813 match bound {
814 GenericBound::Trait(trait_ref) => visitor.visit_poly_trait_ref(trait_ref),
815 GenericBound::Outlives(lifetime) => visitor.visit_lifetime(lifetime, LifetimeCtxt::Bound),
816 GenericBound::Use(args, _span) => {
817 walk_list!(visitor, visit_precise_capturing_arg, args);
818 V::Result::output()
819 }
820 }
821}
822
823pub fn walk_precise_capturing_arg<'a, V: Visitor<'a>>(
824 visitor: &mut V,
825 arg: &'a PreciseCapturingArg,
826) -> V::Result {
827 match arg {
828 PreciseCapturingArg::Lifetime(lt) => visitor.visit_lifetime(lt, LifetimeCtxt::GenericArg),
829 PreciseCapturingArg::Arg(path, id) => visitor.visit_path(path, *id),
830 }
831}
832
833pub fn walk_generic_param<'a, V: Visitor<'a>>(
834 visitor: &mut V,
835 param: &'a GenericParam,
836) -> V::Result {
837 let GenericParam { id: _, ident, attrs, bounds, is_placeholder: _, kind, colon_span: _ } =
838 param;
839 walk_list!(visitor, visit_attribute, attrs);
840 try_visit!(visitor.visit_ident(ident));
841 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
842 match kind {
843 GenericParamKind::Lifetime => (),
844 GenericParamKind::Type { default } => visit_opt!(visitor, visit_ty, default),
845 GenericParamKind::Const { ty, default, kw_span: _ } => {
846 try_visit!(visitor.visit_ty(ty));
847 visit_opt!(visitor, visit_anon_const, default);
848 }
849 }
850 V::Result::output()
851}
852
853pub fn walk_generics<'a, V: Visitor<'a>>(visitor: &mut V, generics: &'a Generics) -> V::Result {
854 let Generics { params, where_clause, span: _ } = generics;
855 let WhereClause { has_where_token: _, predicates, span: _ } = where_clause;
856 walk_list!(visitor, visit_generic_param, params);
857 walk_list!(visitor, visit_where_predicate, predicates);
858 V::Result::output()
859}
860
861pub fn walk_closure_binder<'a, V: Visitor<'a>>(
862 visitor: &mut V,
863 binder: &'a ClosureBinder,
864) -> V::Result {
865 match binder {
866 ClosureBinder::NotPresent => {}
867 ClosureBinder::For { generic_params, span: _ } => {
868 walk_list!(visitor, visit_generic_param, generic_params)
869 }
870 }
871 V::Result::output()
872}
873
874pub fn walk_contract<'a, V: Visitor<'a>>(visitor: &mut V, c: &'a FnContract) -> V::Result {
875 let FnContract { requires, ensures } = c;
876 if let Some(pred) = requires {
877 visitor.visit_expr(pred);
878 }
879 if let Some(pred) = ensures {
880 visitor.visit_expr(pred);
881 }
882 V::Result::output()
883}
884
885pub fn walk_where_predicate<'a, V: Visitor<'a>>(
886 visitor: &mut V,
887 predicate: &'a WherePredicate,
888) -> V::Result {
889 let WherePredicate { attrs, kind, id: _, span: _, is_placeholder: _ } = predicate;
890 walk_list!(visitor, visit_attribute, attrs);
891 visitor.visit_where_predicate_kind(kind)
892}
893
894pub fn walk_where_predicate_kind<'a, V: Visitor<'a>>(
895 visitor: &mut V,
896 kind: &'a WherePredicateKind,
897) -> V::Result {
898 match kind {
899 WherePredicateKind::BoundPredicate(WhereBoundPredicate {
900 bounded_ty,
901 bounds,
902 bound_generic_params,
903 }) => {
904 walk_list!(visitor, visit_generic_param, bound_generic_params);
905 try_visit!(visitor.visit_ty(bounded_ty));
906 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
907 }
908 WherePredicateKind::RegionPredicate(WhereRegionPredicate { lifetime, bounds }) => {
909 try_visit!(visitor.visit_lifetime(lifetime, LifetimeCtxt::Bound));
910 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
911 }
912 WherePredicateKind::EqPredicate(WhereEqPredicate { lhs_ty, rhs_ty }) => {
913 try_visit!(visitor.visit_ty(lhs_ty));
914 try_visit!(visitor.visit_ty(rhs_ty));
915 }
916 }
917 V::Result::output()
918}
919
920pub fn walk_fn_ret_ty<'a, V: Visitor<'a>>(visitor: &mut V, ret_ty: &'a FnRetTy) -> V::Result {
921 match ret_ty {
922 FnRetTy::Default(_span) => {}
923 FnRetTy::Ty(output_ty) => try_visit!(visitor.visit_ty(output_ty)),
924 }
925 V::Result::output()
926}
927
928pub fn walk_fn_header<'a, V: Visitor<'a>>(visitor: &mut V, fn_header: &'a FnHeader) -> V::Result {
929 let FnHeader { safety: _, coroutine_kind, constness: _, ext: _ } = fn_header;
930 visit_opt!(visitor, visit_coroutine_kind, coroutine_kind.as_ref());
931 V::Result::output()
932}
933
934pub fn walk_fn_decl<'a, V: Visitor<'a>>(
935 visitor: &mut V,
936 FnDecl { inputs, output }: &'a FnDecl,
937) -> V::Result {
938 walk_list!(visitor, visit_param, inputs);
939 visitor.visit_fn_ret_ty(output)
940}
941
942pub fn walk_fn<'a, V: Visitor<'a>>(visitor: &mut V, kind: FnKind<'a>) -> V::Result {
943 match kind {
944 FnKind::Fn(
945 _ctxt,
946 _vis,
947 Fn {
948 defaultness: _,
949 ident,
950 sig: FnSig { header, decl, span: _ },
951 generics,
952 contract,
953 body,
954 define_opaque,
955 },
956 ) => {
957 try_visit!(visitor.visit_ident(ident));
959 try_visit!(visitor.visit_fn_header(header));
960 try_visit!(visitor.visit_generics(generics));
961 try_visit!(visitor.visit_fn_decl(decl));
962 visit_opt!(visitor, visit_contract, contract);
963 visit_opt!(visitor, visit_block, body);
964 try_visit!(walk_define_opaques(visitor, define_opaque));
965 }
966 FnKind::Closure(binder, coroutine_kind, decl, body) => {
967 try_visit!(visitor.visit_closure_binder(binder));
968 visit_opt!(visitor, visit_coroutine_kind, coroutine_kind.as_ref());
969 try_visit!(visitor.visit_fn_decl(decl));
970 try_visit!(visitor.visit_expr(body));
971 }
972 }
973 V::Result::output()
974}
975
976impl WalkItemKind for AssocItemKind {
977 type Ctxt = AssocCtxt;
978 fn walk<'a, V: Visitor<'a>>(
979 &'a self,
980 span: Span,
981 id: NodeId,
982 vis: &'a Visibility,
983 ctxt: Self::Ctxt,
984 visitor: &mut V,
985 ) -> V::Result {
986 match self {
987 AssocItemKind::Const(box ConstItem {
988 defaultness: _,
989 ident,
990 generics,
991 ty,
992 expr,
993 define_opaque,
994 }) => {
995 try_visit!(visitor.visit_ident(ident));
996 try_visit!(visitor.visit_generics(generics));
997 try_visit!(visitor.visit_ty(ty));
998 visit_opt!(visitor, visit_expr, expr);
999 try_visit!(walk_define_opaques(visitor, define_opaque));
1000 }
1001 AssocItemKind::Fn(func) => {
1002 let kind = FnKind::Fn(FnCtxt::Assoc(ctxt), vis, &*func);
1003 try_visit!(visitor.visit_fn(kind, span, id));
1004 }
1005 AssocItemKind::Type(box TyAlias {
1006 generics,
1007 ident,
1008 bounds,
1009 ty,
1010 defaultness: _,
1011 where_clauses: _,
1012 }) => {
1013 try_visit!(visitor.visit_generics(generics));
1014 try_visit!(visitor.visit_ident(ident));
1015 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
1016 visit_opt!(visitor, visit_ty, ty);
1017 }
1018 AssocItemKind::MacCall(mac) => {
1019 try_visit!(visitor.visit_mac_call(mac));
1020 }
1021 AssocItemKind::Delegation(box Delegation {
1022 id,
1023 qself,
1024 path,
1025 ident,
1026 rename,
1027 body,
1028 from_glob: _,
1029 }) => {
1030 try_visit!(visitor.visit_qself(qself));
1031 try_visit!(visitor.visit_path(path, *id));
1032 try_visit!(visitor.visit_ident(ident));
1033 visit_opt!(visitor, visit_ident, rename);
1034 visit_opt!(visitor, visit_block, body);
1035 }
1036 AssocItemKind::DelegationMac(box DelegationMac { qself, prefix, suffixes, body }) => {
1037 try_visit!(visitor.visit_qself(qself));
1038 try_visit!(visitor.visit_path(prefix, id));
1039 if let Some(suffixes) = suffixes {
1040 for (ident, rename) in suffixes {
1041 visitor.visit_ident(ident);
1042 if let Some(rename) = rename {
1043 visitor.visit_ident(rename);
1044 }
1045 }
1046 }
1047 visit_opt!(visitor, visit_block, body);
1048 }
1049 }
1050 V::Result::output()
1051 }
1052}
1053
1054pub fn walk_item<'a, V: Visitor<'a>>(
1055 visitor: &mut V,
1056 item: &'a Item<impl WalkItemKind<Ctxt = ()>>,
1057) -> V::Result {
1058 walk_item_ctxt(visitor, item, ())
1059}
1060
1061pub fn walk_assoc_item<'a, V: Visitor<'a>>(
1062 visitor: &mut V,
1063 item: &'a AssocItem,
1064 ctxt: AssocCtxt,
1065) -> V::Result {
1066 walk_item_ctxt(visitor, item, ctxt)
1067}
1068
1069fn walk_item_ctxt<'a, V: Visitor<'a>, K: WalkItemKind>(
1070 visitor: &mut V,
1071 item: &'a Item<K>,
1072 ctxt: K::Ctxt,
1073) -> V::Result {
1074 let Item { id, span, vis, attrs, kind, tokens: _ } = item;
1075 walk_list!(visitor, visit_attribute, attrs);
1076 try_visit!(visitor.visit_vis(vis));
1077 try_visit!(kind.walk(*span, *id, vis, ctxt, visitor));
1078 V::Result::output()
1079}
1080
1081pub fn walk_struct_def<'a, V: Visitor<'a>>(
1082 visitor: &mut V,
1083 struct_definition: &'a VariantData,
1084) -> V::Result {
1085 walk_list!(visitor, visit_field_def, struct_definition.fields());
1086 V::Result::output()
1087}
1088
1089pub fn walk_field_def<'a, V: Visitor<'a>>(visitor: &mut V, field: &'a FieldDef) -> V::Result {
1090 let FieldDef { attrs, id: _, span: _, vis, ident, ty, is_placeholder: _, safety: _, default } =
1091 field;
1092 walk_list!(visitor, visit_attribute, attrs);
1093 try_visit!(visitor.visit_vis(vis));
1094 visit_opt!(visitor, visit_ident, ident);
1095 try_visit!(visitor.visit_ty(ty));
1096 visit_opt!(visitor, visit_anon_const, &*default);
1097 V::Result::output()
1098}
1099
1100pub fn walk_block<'a, V: Visitor<'a>>(visitor: &mut V, block: &'a Block) -> V::Result {
1101 let Block { stmts, id: _, rules: _, span: _, tokens: _ } = block;
1102 walk_list!(visitor, visit_stmt, stmts);
1103 V::Result::output()
1104}
1105
1106pub fn walk_stmt<'a, V: Visitor<'a>>(visitor: &mut V, statement: &'a Stmt) -> V::Result {
1107 let Stmt { id: _, kind, span: _ } = statement;
1108 match kind {
1109 StmtKind::Let(local) => try_visit!(visitor.visit_local(local)),
1110 StmtKind::Item(item) => try_visit!(visitor.visit_item(item)),
1111 StmtKind::Expr(expr) | StmtKind::Semi(expr) => try_visit!(visitor.visit_expr(expr)),
1112 StmtKind::Empty => {}
1113 StmtKind::MacCall(mac) => {
1114 let MacCallStmt { mac, attrs, style: _, tokens: _ } = &**mac;
1115 walk_list!(visitor, visit_attribute, attrs);
1116 try_visit!(visitor.visit_mac_call(mac));
1117 }
1118 }
1119 V::Result::output()
1120}
1121
1122pub fn walk_mac<'a, V: Visitor<'a>>(visitor: &mut V, mac: &'a MacCall) -> V::Result {
1123 let MacCall { path, args: _ } = mac;
1124 visitor.visit_path(path, DUMMY_NODE_ID)
1125}
1126
1127pub fn walk_anon_const<'a, V: Visitor<'a>>(visitor: &mut V, constant: &'a AnonConst) -> V::Result {
1128 let AnonConst { id: _, value } = constant;
1129 visitor.visit_expr(value)
1130}
1131
1132pub fn walk_inline_asm<'a, V: Visitor<'a>>(visitor: &mut V, asm: &'a InlineAsm) -> V::Result {
1133 let InlineAsm {
1134 asm_macro: _,
1135 template: _,
1136 template_strs: _,
1137 operands,
1138 clobber_abis: _,
1139 options: _,
1140 line_spans: _,
1141 } = asm;
1142 for (op, _span) in operands {
1143 match op {
1144 InlineAsmOperand::In { expr, reg: _ }
1145 | InlineAsmOperand::Out { expr: Some(expr), reg: _, late: _ }
1146 | InlineAsmOperand::InOut { expr, reg: _, late: _ } => {
1147 try_visit!(visitor.visit_expr(expr))
1148 }
1149 InlineAsmOperand::Out { expr: None, reg: _, late: _ } => {}
1150 InlineAsmOperand::SplitInOut { in_expr, out_expr, reg: _, late: _ } => {
1151 try_visit!(visitor.visit_expr(in_expr));
1152 visit_opt!(visitor, visit_expr, out_expr);
1153 }
1154 InlineAsmOperand::Const { anon_const } => {
1155 try_visit!(visitor.visit_anon_const(anon_const))
1156 }
1157 InlineAsmOperand::Sym { sym } => try_visit!(visitor.visit_inline_asm_sym(sym)),
1158 InlineAsmOperand::Label { block } => try_visit!(visitor.visit_block(block)),
1159 }
1160 }
1161 V::Result::output()
1162}
1163
1164pub fn walk_inline_asm_sym<'a, V: Visitor<'a>>(
1165 visitor: &mut V,
1166 InlineAsmSym { id, qself, path }: &'a InlineAsmSym,
1167) -> V::Result {
1168 try_visit!(visitor.visit_qself(qself));
1169 visitor.visit_path(path, *id)
1170}
1171
1172pub fn walk_format_args<'a, V: Visitor<'a>>(visitor: &mut V, fmt: &'a FormatArgs) -> V::Result {
1173 let FormatArgs { span: _, template: _, arguments, uncooked_fmt_str: _ } = fmt;
1174 for FormatArgument { kind, expr } in arguments.all_args() {
1175 match kind {
1176 FormatArgumentKind::Named(ident) | FormatArgumentKind::Captured(ident) => {
1177 try_visit!(visitor.visit_ident(ident))
1178 }
1179 FormatArgumentKind::Normal => {}
1180 }
1181 try_visit!(visitor.visit_expr(expr));
1182 }
1183 V::Result::output()
1184}
1185
1186pub fn walk_expr<'a, V: Visitor<'a>>(visitor: &mut V, expression: &'a Expr) -> V::Result {
1187 let Expr { id, kind, span, attrs, tokens: _ } = expression;
1188 walk_list!(visitor, visit_attribute, attrs);
1189 match kind {
1190 ExprKind::Array(subexpressions) => {
1191 walk_list!(visitor, visit_expr, subexpressions);
1192 }
1193 ExprKind::ConstBlock(anon_const) => try_visit!(visitor.visit_anon_const(anon_const)),
1194 ExprKind::Repeat(element, count) => {
1195 try_visit!(visitor.visit_expr(element));
1196 try_visit!(visitor.visit_anon_const(count));
1197 }
1198 ExprKind::Struct(se) => {
1199 let StructExpr { qself, path, fields, rest } = &**se;
1200 try_visit!(visitor.visit_qself(qself));
1201 try_visit!(visitor.visit_path(path, *id));
1202 walk_list!(visitor, visit_expr_field, fields);
1203 match rest {
1204 StructRest::Base(expr) => try_visit!(visitor.visit_expr(expr)),
1205 StructRest::Rest(_span) => {}
1206 StructRest::None => {}
1207 }
1208 }
1209 ExprKind::Tup(subexpressions) => {
1210 walk_list!(visitor, visit_expr, subexpressions);
1211 }
1212 ExprKind::Call(callee_expression, arguments) => {
1213 try_visit!(visitor.visit_expr(callee_expression));
1214 walk_list!(visitor, visit_expr, arguments);
1215 }
1216 ExprKind::MethodCall(box MethodCall { seg, receiver, args, span: _ }) => {
1217 try_visit!(visitor.visit_expr(receiver));
1218 try_visit!(visitor.visit_path_segment(seg));
1219 walk_list!(visitor, visit_expr, args);
1220 }
1221 ExprKind::Binary(_op, left_expression, right_expression) => {
1222 try_visit!(visitor.visit_expr(left_expression));
1223 try_visit!(visitor.visit_expr(right_expression));
1224 }
1225 ExprKind::AddrOf(_kind, _mutbl, subexpression) => {
1226 try_visit!(visitor.visit_expr(subexpression));
1227 }
1228 ExprKind::Unary(_op, subexpression) => {
1229 try_visit!(visitor.visit_expr(subexpression));
1230 }
1231 ExprKind::Cast(subexpression, typ) | ExprKind::Type(subexpression, typ) => {
1232 try_visit!(visitor.visit_expr(subexpression));
1233 try_visit!(visitor.visit_ty(typ));
1234 }
1235 ExprKind::Let(pat, expr, _span, _recovered) => {
1236 try_visit!(visitor.visit_pat(pat));
1237 try_visit!(visitor.visit_expr(expr));
1238 }
1239 ExprKind::If(head_expression, if_block, optional_else) => {
1240 try_visit!(visitor.visit_expr(head_expression));
1241 try_visit!(visitor.visit_block(if_block));
1242 visit_opt!(visitor, visit_expr, optional_else);
1243 }
1244 ExprKind::While(subexpression, block, opt_label) => {
1245 visit_opt!(visitor, visit_label, opt_label);
1246 try_visit!(visitor.visit_expr(subexpression));
1247 try_visit!(visitor.visit_block(block));
1248 }
1249 ExprKind::ForLoop { pat, iter, body, label, kind: _ } => {
1250 visit_opt!(visitor, visit_label, label);
1251 try_visit!(visitor.visit_pat(pat));
1252 try_visit!(visitor.visit_expr(iter));
1253 try_visit!(visitor.visit_block(body));
1254 }
1255 ExprKind::Loop(block, opt_label, _span) => {
1256 visit_opt!(visitor, visit_label, opt_label);
1257 try_visit!(visitor.visit_block(block));
1258 }
1259 ExprKind::Match(subexpression, arms, _kind) => {
1260 try_visit!(visitor.visit_expr(subexpression));
1261 walk_list!(visitor, visit_arm, arms);
1262 }
1263 ExprKind::Closure(box Closure {
1264 binder,
1265 capture_clause,
1266 coroutine_kind,
1267 constness: _,
1268 movability: _,
1269 fn_decl,
1270 body,
1271 fn_decl_span: _,
1272 fn_arg_span: _,
1273 }) => {
1274 try_visit!(visitor.visit_capture_by(capture_clause));
1275 try_visit!(visitor.visit_fn(
1276 FnKind::Closure(binder, coroutine_kind, fn_decl, body),
1277 *span,
1278 *id
1279 ));
1280 }
1281 ExprKind::Block(block, opt_label) => {
1282 visit_opt!(visitor, visit_label, opt_label);
1283 try_visit!(visitor.visit_block(block));
1284 }
1285 ExprKind::Gen(_capt, body, _kind, _decl_span) => try_visit!(visitor.visit_block(body)),
1286 ExprKind::Await(expr, _span) => try_visit!(visitor.visit_expr(expr)),
1287 ExprKind::Use(expr, _span) => try_visit!(visitor.visit_expr(expr)),
1288 ExprKind::Assign(lhs, rhs, _span) => {
1289 try_visit!(visitor.visit_expr(lhs));
1290 try_visit!(visitor.visit_expr(rhs));
1291 }
1292 ExprKind::AssignOp(_op, left_expression, right_expression) => {
1293 try_visit!(visitor.visit_expr(left_expression));
1294 try_visit!(visitor.visit_expr(right_expression));
1295 }
1296 ExprKind::Field(subexpression, ident) => {
1297 try_visit!(visitor.visit_expr(subexpression));
1298 try_visit!(visitor.visit_ident(ident));
1299 }
1300 ExprKind::Index(main_expression, index_expression, _span) => {
1301 try_visit!(visitor.visit_expr(main_expression));
1302 try_visit!(visitor.visit_expr(index_expression));
1303 }
1304 ExprKind::Range(start, end, _limit) => {
1305 visit_opt!(visitor, visit_expr, start);
1306 visit_opt!(visitor, visit_expr, end);
1307 }
1308 ExprKind::Underscore => {}
1309 ExprKind::Path(maybe_qself, path) => {
1310 try_visit!(visitor.visit_qself(maybe_qself));
1311 try_visit!(visitor.visit_path(path, *id));
1312 }
1313 ExprKind::Break(opt_label, opt_expr) => {
1314 visit_opt!(visitor, visit_label, opt_label);
1315 visit_opt!(visitor, visit_expr, opt_expr);
1316 }
1317 ExprKind::Continue(opt_label) => {
1318 visit_opt!(visitor, visit_label, opt_label);
1319 }
1320 ExprKind::Ret(optional_expression) => {
1321 visit_opt!(visitor, visit_expr, optional_expression);
1322 }
1323 ExprKind::Yeet(optional_expression) => {
1324 visit_opt!(visitor, visit_expr, optional_expression);
1325 }
1326 ExprKind::Become(expr) => try_visit!(visitor.visit_expr(expr)),
1327 ExprKind::MacCall(mac) => try_visit!(visitor.visit_mac_call(mac)),
1328 ExprKind::Paren(subexpression) => try_visit!(visitor.visit_expr(subexpression)),
1329 ExprKind::InlineAsm(asm) => try_visit!(visitor.visit_inline_asm(asm)),
1330 ExprKind::FormatArgs(f) => try_visit!(visitor.visit_format_args(f)),
1331 ExprKind::OffsetOf(container, fields) => {
1332 try_visit!(visitor.visit_ty(container));
1333 walk_list!(visitor, visit_ident, fields.iter());
1334 }
1335 ExprKind::Yield(kind) => {
1336 visit_opt!(visitor, visit_expr, kind.expr());
1337 }
1338 ExprKind::Try(subexpression) => try_visit!(visitor.visit_expr(subexpression)),
1339 ExprKind::TryBlock(body) => try_visit!(visitor.visit_block(body)),
1340 ExprKind::Lit(_token) => {}
1341 ExprKind::IncludedBytes(_bytes) => {}
1342 ExprKind::UnsafeBinderCast(_kind, expr, ty) => {
1343 try_visit!(visitor.visit_expr(expr));
1344 visit_opt!(visitor, visit_ty, ty);
1345 }
1346 ExprKind::Err(_guar) => {}
1347 ExprKind::Dummy => {}
1348 }
1349
1350 V::Result::output()
1351}
1352
1353pub fn walk_param<'a, V: Visitor<'a>>(visitor: &mut V, param: &'a Param) -> V::Result {
1354 let Param { attrs, ty, pat, id: _, span: _, is_placeholder: _ } = param;
1355 walk_list!(visitor, visit_attribute, attrs);
1356 try_visit!(visitor.visit_pat(pat));
1357 try_visit!(visitor.visit_ty(ty));
1358 V::Result::output()
1359}
1360
1361pub fn walk_arm<'a, V: Visitor<'a>>(visitor: &mut V, arm: &'a Arm) -> V::Result {
1362 let Arm { attrs, pat, guard, body, span: _, id: _, is_placeholder: _ } = arm;
1363 walk_list!(visitor, visit_attribute, attrs);
1364 try_visit!(visitor.visit_pat(pat));
1365 visit_opt!(visitor, visit_expr, guard);
1366 visit_opt!(visitor, visit_expr, body);
1367 V::Result::output()
1368}
1369
1370pub fn walk_vis<'a, V: Visitor<'a>>(visitor: &mut V, vis: &'a Visibility) -> V::Result {
1371 let Visibility { kind, span: _, tokens: _ } = vis;
1372 match kind {
1373 VisibilityKind::Restricted { path, id, shorthand: _ } => {
1374 try_visit!(visitor.visit_path(path, *id));
1375 }
1376 VisibilityKind::Public | VisibilityKind::Inherited => {}
1377 }
1378 V::Result::output()
1379}
1380
1381pub fn walk_attribute<'a, V: Visitor<'a>>(visitor: &mut V, attr: &'a Attribute) -> V::Result {
1382 let Attribute { kind, id: _, style: _, span: _ } = attr;
1383 match kind {
1384 AttrKind::Normal(normal) => {
1385 let NormalAttr { item, tokens: _ } = &**normal;
1386 let AttrItem { unsafety: _, path, args, tokens: _ } = item;
1387 try_visit!(visitor.visit_path(path, DUMMY_NODE_ID));
1388 try_visit!(walk_attr_args(visitor, args));
1389 }
1390 AttrKind::DocComment(_kind, _sym) => {}
1391 }
1392 V::Result::output()
1393}
1394
1395pub fn walk_attr_args<'a, V: Visitor<'a>>(visitor: &mut V, args: &'a AttrArgs) -> V::Result {
1396 match args {
1397 AttrArgs::Empty => {}
1398 AttrArgs::Delimited(_args) => {}
1399 AttrArgs::Eq { expr, .. } => try_visit!(visitor.visit_expr(expr)),
1400 }
1401 V::Result::output()
1402}
1403
1404fn walk_define_opaques<'a, V: Visitor<'a>>(
1405 visitor: &mut V,
1406 define_opaque: &'a Option<ThinVec<(NodeId, Path)>>,
1407) -> V::Result {
1408 if let Some(define_opaque) = define_opaque {
1409 for (id, path) in define_opaque {
1410 try_visit!(visitor.visit_path(path, *id));
1411 }
1412 }
1413 V::Result::output()
1414}