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
318#[macro_export]
319macro_rules! common_visitor_and_walkers {
320 ($(($mut: ident))? $Visitor:ident$(<$lt:lifetime>)?) => {
321 $(${ignore($lt)}
323 #[expect(unused, rustc::pass_by_value)]
324 #[inline]
325 )?
326 fn visit_span<$($lt,)? V: $Visitor$(<$lt>)?>(visitor: &mut V, span: &$($lt)? $($mut)? Span) $(-> <V as Visitor<$lt>>::Result)? {
327 $(
328 let _ = stringify!($mut);
329 visitor.visit_span(span);
330 )?
331 $(${ignore($lt)}V::Result::output())?
332 }
333
334 $(${ignore($lt)}
336 #[expect(unused, rustc::pass_by_value)]
337 #[inline]
338 )?
339 fn visit_id<$($lt,)? V: $Visitor$(<$lt>)?>(visitor: &mut V, id: &$($lt)? $($mut)? NodeId) $(-> <V as Visitor<$lt>>::Result)? {
340 $(
341 let _ = stringify!($mut);
342 visitor.visit_id(id);
343 )?
344 $(${ignore($lt)}V::Result::output())?
345 }
346
347 fn visit_safety<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, safety: &$($lt)? $($mut)? Safety) $(-> <V as Visitor<$lt>>::Result)? {
349 match safety {
350 Safety::Unsafe(span) => visit_span(vis, span),
351 Safety::Safe(span) => visit_span(vis, span),
352 Safety::Default => { $(${ignore($lt)}V::Result::output())? }
353 }
354 }
355
356 fn visit_constness<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, constness: &$($lt)? $($mut)? Const) $(-> <V as Visitor<$lt>>::Result)? {
357 match constness {
358 Const::Yes(span) => visit_span(vis, span),
359 Const::No => {
360 $(<V as Visitor<$lt>>::Result::output())?
361 }
362 }
363 }
364
365 pub fn walk_label<$($lt,)? V: $Visitor$(<$lt>)?>(visitor: &mut V, Label { ident }: &$($lt)? $($mut)? Label) $(-> <V as Visitor<$lt>>::Result)? {
366 visitor.visit_ident(ident)
367 }
368
369 pub fn walk_fn_header<$($lt,)? V: $Visitor$(<$lt>)?>(visitor: &mut V, header: &$($lt)? $($mut)? FnHeader) $(-> <V as Visitor<$lt>>::Result)? {
370 let FnHeader { safety, coroutine_kind, constness, ext: _ } = header;
371 try_visit!(visit_constness(visitor, constness));
372 if let Some(coroutine_kind) = coroutine_kind {
373 try_visit!(visitor.visit_coroutine_kind(coroutine_kind));
374 }
375 visit_safety(visitor, safety)
376 }
377
378 pub fn walk_lifetime<$($lt,)? V: $Visitor$(<$lt>)?>(visitor: &mut V, Lifetime { id, ident }: &$($lt)? $($mut)? Lifetime) $(-> <V as Visitor<$lt>>::Result)? {
379 try_visit!(visit_id(visitor, id));
380 visitor.visit_ident(ident)
381 }
382 };
383}
384
385common_visitor_and_walkers!(Visitor<'a>);
386
387pub fn walk_crate<'a, V: Visitor<'a>>(visitor: &mut V, krate: &'a Crate) -> V::Result {
388 let Crate { attrs, items, spans: _, id: _, is_placeholder: _ } = krate;
389 walk_list!(visitor, visit_attribute, attrs);
390 walk_list!(visitor, visit_item, items);
391 V::Result::output()
392}
393
394pub fn walk_local<'a, V: Visitor<'a>>(visitor: &mut V, local: &'a Local) -> V::Result {
395 let Local { id: _, super_: _, pat, ty, kind, span: _, colon_sp: _, attrs, tokens: _ } = local;
396 walk_list!(visitor, visit_attribute, attrs);
397 try_visit!(visitor.visit_pat(pat));
398 visit_opt!(visitor, visit_ty, ty);
399 if let Some((init, els)) = kind.init_else_opt() {
400 try_visit!(visitor.visit_expr(init));
401 visit_opt!(visitor, visit_block, els);
402 }
403 V::Result::output()
404}
405
406pub fn walk_poly_trait_ref<'a, V>(visitor: &mut V, trait_ref: &'a PolyTraitRef) -> V::Result
407where
408 V: Visitor<'a>,
409{
410 let PolyTraitRef { bound_generic_params, modifiers: _, trait_ref, span: _ } = trait_ref;
411 walk_list!(visitor, visit_generic_param, bound_generic_params);
412 visitor.visit_trait_ref(trait_ref)
413}
414
415pub fn walk_trait_ref<'a, V: Visitor<'a>>(visitor: &mut V, trait_ref: &'a TraitRef) -> V::Result {
416 let TraitRef { path, ref_id } = trait_ref;
417 visitor.visit_path(path, *ref_id)
418}
419
420impl WalkItemKind for ItemKind {
421 type Ctxt = ();
422 fn walk<'a, V: Visitor<'a>>(
423 &'a self,
424 span: Span,
425 id: NodeId,
426 vis: &'a Visibility,
427 _ctxt: Self::Ctxt,
428 visitor: &mut V,
429 ) -> V::Result {
430 match self {
431 ItemKind::ExternCrate(_rename, ident) => try_visit!(visitor.visit_ident(ident)),
432 ItemKind::Use(use_tree) => try_visit!(visitor.visit_use_tree(use_tree, id, false)),
433 ItemKind::Static(box StaticItem {
434 ident,
435 ty,
436 safety: _,
437 mutability: _,
438 expr,
439 define_opaque,
440 }) => {
441 try_visit!(visitor.visit_ident(ident));
442 try_visit!(visitor.visit_ty(ty));
443 visit_opt!(visitor, visit_expr, expr);
444 try_visit!(walk_define_opaques(visitor, define_opaque));
445 }
446 ItemKind::Const(box ConstItem {
447 defaultness: _,
448 ident,
449 generics,
450 ty,
451 expr,
452 define_opaque,
453 }) => {
454 try_visit!(visitor.visit_ident(ident));
455 try_visit!(visitor.visit_generics(generics));
456 try_visit!(visitor.visit_ty(ty));
457 visit_opt!(visitor, visit_expr, expr);
458 try_visit!(walk_define_opaques(visitor, define_opaque));
459 }
460 ItemKind::Fn(func) => {
461 let kind = FnKind::Fn(FnCtxt::Free, vis, &*func);
462 try_visit!(visitor.visit_fn(kind, span, id));
463 }
464 ItemKind::Mod(_unsafety, ident, mod_kind) => {
465 try_visit!(visitor.visit_ident(ident));
466 match mod_kind {
467 ModKind::Loaded(items, _inline, _inner_span, _) => {
468 walk_list!(visitor, visit_item, items);
469 }
470 ModKind::Unloaded => {}
471 }
472 }
473 ItemKind::ForeignMod(ForeignMod { extern_span: _, safety: _, abi: _, items }) => {
474 walk_list!(visitor, visit_foreign_item, items);
475 }
476 ItemKind::GlobalAsm(asm) => try_visit!(visitor.visit_inline_asm(asm)),
477 ItemKind::TyAlias(box TyAlias {
478 generics,
479 ident,
480 bounds,
481 ty,
482 defaultness: _,
483 where_clauses: _,
484 }) => {
485 try_visit!(visitor.visit_ident(ident));
486 try_visit!(visitor.visit_generics(generics));
487 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
488 visit_opt!(visitor, visit_ty, ty);
489 }
490 ItemKind::Enum(ident, enum_definition, generics) => {
491 try_visit!(visitor.visit_ident(ident));
492 try_visit!(visitor.visit_generics(generics));
493 try_visit!(visitor.visit_enum_def(enum_definition));
494 }
495 ItemKind::Impl(box Impl {
496 defaultness: _,
497 safety: _,
498 generics,
499 constness: _,
500 polarity: _,
501 of_trait,
502 self_ty,
503 items,
504 }) => {
505 try_visit!(visitor.visit_generics(generics));
506 visit_opt!(visitor, visit_trait_ref, of_trait);
507 try_visit!(visitor.visit_ty(self_ty));
508 walk_list!(
509 visitor,
510 visit_assoc_item,
511 items,
512 AssocCtxt::Impl { of_trait: of_trait.is_some() }
513 );
514 }
515 ItemKind::Struct(ident, struct_definition, generics)
516 | ItemKind::Union(ident, struct_definition, generics) => {
517 try_visit!(visitor.visit_ident(ident));
518 try_visit!(visitor.visit_generics(generics));
519 try_visit!(visitor.visit_variant_data(struct_definition));
520 }
521 ItemKind::Trait(box Trait {
522 safety: _,
523 is_auto: _,
524 ident,
525 generics,
526 bounds,
527 items,
528 }) => {
529 try_visit!(visitor.visit_ident(ident));
530 try_visit!(visitor.visit_generics(generics));
531 walk_list!(visitor, visit_param_bound, bounds, BoundKind::SuperTraits);
532 walk_list!(visitor, visit_assoc_item, items, AssocCtxt::Trait);
533 }
534 ItemKind::TraitAlias(ident, generics, bounds) => {
535 try_visit!(visitor.visit_ident(ident));
536 try_visit!(visitor.visit_generics(generics));
537 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
538 }
539 ItemKind::MacCall(mac) => try_visit!(visitor.visit_mac_call(mac)),
540 ItemKind::MacroDef(ident, ts) => {
541 try_visit!(visitor.visit_ident(ident));
542 try_visit!(visitor.visit_mac_def(ts, id))
543 }
544 ItemKind::Delegation(box Delegation {
545 id,
546 qself,
547 path,
548 ident,
549 rename,
550 body,
551 from_glob: _,
552 }) => {
553 try_visit!(visitor.visit_qself(qself));
554 try_visit!(visitor.visit_path(path, *id));
555 try_visit!(visitor.visit_ident(ident));
556 visit_opt!(visitor, visit_ident, rename);
557 visit_opt!(visitor, visit_block, body);
558 }
559 ItemKind::DelegationMac(box DelegationMac { qself, prefix, suffixes, body }) => {
560 try_visit!(visitor.visit_qself(qself));
561 try_visit!(visitor.visit_path(prefix, id));
562 if let Some(suffixes) = suffixes {
563 for (ident, rename) in suffixes {
564 visitor.visit_ident(ident);
565 if let Some(rename) = rename {
566 visitor.visit_ident(rename);
567 }
568 }
569 }
570 visit_opt!(visitor, visit_block, body);
571 }
572 }
573 V::Result::output()
574 }
575}
576
577pub fn walk_enum_def<'a, V: Visitor<'a>>(
578 visitor: &mut V,
579 EnumDef { variants }: &'a EnumDef,
580) -> V::Result {
581 walk_list!(visitor, visit_variant, variants);
582 V::Result::output()
583}
584
585pub fn walk_variant<'a, V: Visitor<'a>>(visitor: &mut V, variant: &'a Variant) -> V::Result
586where
587 V: Visitor<'a>,
588{
589 let Variant { attrs, id: _, span: _, vis, ident, data, disr_expr, is_placeholder: _ } = variant;
590 walk_list!(visitor, visit_attribute, attrs);
591 try_visit!(visitor.visit_vis(vis));
592 try_visit!(visitor.visit_ident(ident));
593 try_visit!(visitor.visit_variant_data(data));
594 visit_opt!(visitor, visit_variant_discr, disr_expr);
595 V::Result::output()
596}
597
598pub fn walk_expr_field<'a, V: Visitor<'a>>(visitor: &mut V, f: &'a ExprField) -> V::Result {
599 let ExprField { attrs, id: _, span: _, ident, expr, is_shorthand: _, is_placeholder: _ } = f;
600 walk_list!(visitor, visit_attribute, attrs);
601 try_visit!(visitor.visit_ident(ident));
602 try_visit!(visitor.visit_expr(expr));
603 V::Result::output()
604}
605
606pub fn walk_pat_field<'a, V: Visitor<'a>>(visitor: &mut V, fp: &'a PatField) -> V::Result {
607 let PatField { ident, pat, is_shorthand: _, attrs, id: _, span: _, is_placeholder: _ } = fp;
608 walk_list!(visitor, visit_attribute, attrs);
609 try_visit!(visitor.visit_ident(ident));
610 try_visit!(visitor.visit_pat(pat));
611 V::Result::output()
612}
613
614pub fn walk_ty<'a, V: Visitor<'a>>(visitor: &mut V, typ: &'a Ty) -> V::Result {
615 let Ty { id, kind, span: _, tokens: _ } = typ;
616 match kind {
617 TyKind::Slice(ty) | TyKind::Paren(ty) => try_visit!(visitor.visit_ty(ty)),
618 TyKind::Ptr(MutTy { ty, mutbl: _ }) => try_visit!(visitor.visit_ty(ty)),
619 TyKind::Ref(opt_lifetime, MutTy { ty, mutbl: _ })
620 | TyKind::PinnedRef(opt_lifetime, MutTy { ty, mutbl: _ }) => {
621 visit_opt!(visitor, visit_lifetime, opt_lifetime, LifetimeCtxt::Ref);
622 try_visit!(visitor.visit_ty(ty));
623 }
624 TyKind::Tup(tuple_element_types) => {
625 walk_list!(visitor, visit_ty, tuple_element_types);
626 }
627 TyKind::BareFn(function_declaration) => {
628 let BareFnTy { safety: _, ext: _, generic_params, decl, decl_span: _ } =
629 &**function_declaration;
630 walk_list!(visitor, visit_generic_param, generic_params);
631 try_visit!(visitor.visit_fn_decl(decl));
632 }
633 TyKind::UnsafeBinder(binder) => {
634 walk_list!(visitor, visit_generic_param, &binder.generic_params);
635 try_visit!(visitor.visit_ty(&binder.inner_ty));
636 }
637 TyKind::Path(maybe_qself, path) => {
638 try_visit!(visitor.visit_qself(maybe_qself));
639 try_visit!(visitor.visit_path(path, *id));
640 }
641 TyKind::Pat(ty, pat) => {
642 try_visit!(visitor.visit_ty(ty));
643 try_visit!(visitor.visit_ty_pat(pat));
644 }
645 TyKind::Array(ty, length) => {
646 try_visit!(visitor.visit_ty(ty));
647 try_visit!(visitor.visit_anon_const(length));
648 }
649 TyKind::TraitObject(bounds, _syntax) => {
650 walk_list!(visitor, visit_param_bound, bounds, BoundKind::TraitObject);
651 }
652 TyKind::ImplTrait(_id, bounds) => {
653 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Impl);
654 }
655 TyKind::Typeof(expression) => try_visit!(visitor.visit_anon_const(expression)),
656 TyKind::Infer | TyKind::ImplicitSelf | TyKind::Dummy => {}
657 TyKind::Err(_guar) => {}
658 TyKind::MacCall(mac) => try_visit!(visitor.visit_mac_call(mac)),
659 TyKind::Never | TyKind::CVarArgs => {}
660 }
661 V::Result::output()
662}
663
664pub fn walk_ty_pat<'a, V: Visitor<'a>>(visitor: &mut V, tp: &'a TyPat) -> V::Result {
665 let TyPat { id: _, kind, span: _, tokens: _ } = tp;
666 match kind {
667 TyPatKind::Range(start, end, _include_end) => {
668 visit_opt!(visitor, visit_anon_const, start);
669 visit_opt!(visitor, visit_anon_const, end);
670 }
671 TyPatKind::Or(variants) => walk_list!(visitor, visit_ty_pat, variants),
672 TyPatKind::Err(_) => {}
673 }
674 V::Result::output()
675}
676
677fn walk_qself<'a, V: Visitor<'a>>(visitor: &mut V, qself: &'a Option<P<QSelf>>) -> V::Result {
678 if let Some(qself) = qself {
679 let QSelf { ty, path_span: _, position: _ } = &**qself;
680 try_visit!(visitor.visit_ty(ty));
681 }
682 V::Result::output()
683}
684
685pub fn walk_path<'a, V: Visitor<'a>>(visitor: &mut V, path: &'a Path) -> V::Result {
686 let Path { span: _, segments, tokens: _ } = path;
687 walk_list!(visitor, visit_path_segment, segments);
688 V::Result::output()
689}
690
691pub fn walk_use_tree<'a, V: Visitor<'a>>(
692 visitor: &mut V,
693 use_tree: &'a UseTree,
694 id: NodeId,
695) -> V::Result {
696 let UseTree { prefix, kind, span: _ } = use_tree;
697 try_visit!(visitor.visit_path(prefix, id));
698 match kind {
699 UseTreeKind::Simple(rename) => {
700 visit_opt!(visitor, visit_ident, rename);
702 }
703 UseTreeKind::Glob => {}
704 UseTreeKind::Nested { items, span: _ } => {
705 for &(ref nested_tree, nested_id) in items {
706 try_visit!(visitor.visit_use_tree(nested_tree, nested_id, true));
707 }
708 }
709 }
710 V::Result::output()
711}
712
713pub fn walk_path_segment<'a, V: Visitor<'a>>(
714 visitor: &mut V,
715 segment: &'a PathSegment,
716) -> V::Result {
717 let PathSegment { ident, id: _, args } = segment;
718 try_visit!(visitor.visit_ident(ident));
719 visit_opt!(visitor, visit_generic_args, args);
720 V::Result::output()
721}
722
723pub fn walk_generic_args<'a, V>(visitor: &mut V, generic_args: &'a GenericArgs) -> V::Result
724where
725 V: Visitor<'a>,
726{
727 match generic_args {
728 GenericArgs::AngleBracketed(AngleBracketedArgs { span: _, args }) => {
729 for arg in args {
730 match arg {
731 AngleBracketedArg::Arg(a) => try_visit!(visitor.visit_generic_arg(a)),
732 AngleBracketedArg::Constraint(c) => {
733 try_visit!(visitor.visit_assoc_item_constraint(c))
734 }
735 }
736 }
737 }
738 GenericArgs::Parenthesized(data) => {
739 let ParenthesizedArgs { span: _, inputs, inputs_span: _, output } = data;
740 walk_list!(visitor, visit_ty, inputs);
741 try_visit!(visitor.visit_fn_ret_ty(output));
742 }
743 GenericArgs::ParenthesizedElided(_span) => {}
744 }
745 V::Result::output()
746}
747
748pub fn walk_generic_arg<'a, V>(visitor: &mut V, generic_arg: &'a GenericArg) -> V::Result
749where
750 V: Visitor<'a>,
751{
752 match generic_arg {
753 GenericArg::Lifetime(lt) => visitor.visit_lifetime(lt, LifetimeCtxt::GenericArg),
754 GenericArg::Type(ty) => visitor.visit_ty(ty),
755 GenericArg::Const(ct) => visitor.visit_anon_const(ct),
756 }
757}
758
759pub fn walk_assoc_item_constraint<'a, V: Visitor<'a>>(
760 visitor: &mut V,
761 constraint: &'a AssocItemConstraint,
762) -> V::Result {
763 let AssocItemConstraint { id: _, ident, gen_args, kind, span: _ } = constraint;
764 try_visit!(visitor.visit_ident(ident));
765 visit_opt!(visitor, visit_generic_args, gen_args);
766 match kind {
767 AssocItemConstraintKind::Equality { term } => match term {
768 Term::Ty(ty) => try_visit!(visitor.visit_ty(ty)),
769 Term::Const(c) => try_visit!(visitor.visit_anon_const(c)),
770 },
771 AssocItemConstraintKind::Bound { bounds } => {
772 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
773 }
774 }
775 V::Result::output()
776}
777
778pub fn walk_pat<'a, V: Visitor<'a>>(visitor: &mut V, pattern: &'a Pat) -> V::Result {
779 let Pat { id, kind, span: _, tokens: _ } = pattern;
780 match kind {
781 PatKind::TupleStruct(opt_qself, path, elems) => {
782 try_visit!(visitor.visit_qself(opt_qself));
783 try_visit!(visitor.visit_path(path, *id));
784 walk_list!(visitor, visit_pat, elems);
785 }
786 PatKind::Path(opt_qself, path) => {
787 try_visit!(visitor.visit_qself(opt_qself));
788 try_visit!(visitor.visit_path(path, *id))
789 }
790 PatKind::Struct(opt_qself, path, fields, _rest) => {
791 try_visit!(visitor.visit_qself(opt_qself));
792 try_visit!(visitor.visit_path(path, *id));
793 walk_list!(visitor, visit_pat_field, fields);
794 }
795 PatKind::Box(subpattern) | PatKind::Deref(subpattern) | PatKind::Paren(subpattern) => {
796 try_visit!(visitor.visit_pat(subpattern));
797 }
798 PatKind::Ref(subpattern, _ ) => {
799 try_visit!(visitor.visit_pat(subpattern));
800 }
801 PatKind::Ident(_bmode, ident, optional_subpattern) => {
802 try_visit!(visitor.visit_ident(ident));
803 visit_opt!(visitor, visit_pat, optional_subpattern);
804 }
805 PatKind::Expr(expression) => try_visit!(visitor.visit_expr(expression)),
806 PatKind::Range(lower_bound, upper_bound, _end) => {
807 visit_opt!(visitor, visit_expr, lower_bound);
808 visit_opt!(visitor, visit_expr, upper_bound);
809 }
810 PatKind::Guard(subpattern, guard_condition) => {
811 try_visit!(visitor.visit_pat(subpattern));
812 try_visit!(visitor.visit_expr(guard_condition));
813 }
814 PatKind::Missing | PatKind::Wild | PatKind::Rest | PatKind::Never => {}
815 PatKind::Err(_guar) => {}
816 PatKind::Tuple(elems) | PatKind::Slice(elems) | PatKind::Or(elems) => {
817 walk_list!(visitor, visit_pat, elems);
818 }
819 PatKind::MacCall(mac) => try_visit!(visitor.visit_mac_call(mac)),
820 }
821 V::Result::output()
822}
823
824impl WalkItemKind for ForeignItemKind {
825 type Ctxt = ();
826 fn walk<'a, V: Visitor<'a>>(
827 &'a self,
828 span: Span,
829 id: NodeId,
830 vis: &'a Visibility,
831 _ctxt: Self::Ctxt,
832 visitor: &mut V,
833 ) -> V::Result {
834 match self {
835 ForeignItemKind::Static(box StaticItem {
836 ident,
837 ty,
838 mutability: _,
839 expr,
840 safety: _,
841 define_opaque,
842 }) => {
843 try_visit!(visitor.visit_ident(ident));
844 try_visit!(visitor.visit_ty(ty));
845 visit_opt!(visitor, visit_expr, expr);
846 try_visit!(walk_define_opaques(visitor, define_opaque));
847 }
848 ForeignItemKind::Fn(func) => {
849 let kind = FnKind::Fn(FnCtxt::Foreign, vis, &*func);
850 try_visit!(visitor.visit_fn(kind, span, id));
851 }
852 ForeignItemKind::TyAlias(box TyAlias {
853 generics,
854 ident,
855 bounds,
856 ty,
857 defaultness: _,
858 where_clauses: _,
859 }) => {
860 try_visit!(visitor.visit_ident(ident));
861 try_visit!(visitor.visit_generics(generics));
862 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
863 visit_opt!(visitor, visit_ty, ty);
864 }
865 ForeignItemKind::MacCall(mac) => {
866 try_visit!(visitor.visit_mac_call(mac));
867 }
868 }
869 V::Result::output()
870 }
871}
872
873pub fn walk_param_bound<'a, V: Visitor<'a>>(visitor: &mut V, bound: &'a GenericBound) -> V::Result {
874 match bound {
875 GenericBound::Trait(trait_ref) => visitor.visit_poly_trait_ref(trait_ref),
876 GenericBound::Outlives(lifetime) => visitor.visit_lifetime(lifetime, LifetimeCtxt::Bound),
877 GenericBound::Use(args, _span) => {
878 walk_list!(visitor, visit_precise_capturing_arg, args);
879 V::Result::output()
880 }
881 }
882}
883
884pub fn walk_precise_capturing_arg<'a, V: Visitor<'a>>(
885 visitor: &mut V,
886 arg: &'a PreciseCapturingArg,
887) -> V::Result {
888 match arg {
889 PreciseCapturingArg::Lifetime(lt) => visitor.visit_lifetime(lt, LifetimeCtxt::GenericArg),
890 PreciseCapturingArg::Arg(path, id) => visitor.visit_path(path, *id),
891 }
892}
893
894pub fn walk_generic_param<'a, V: Visitor<'a>>(
895 visitor: &mut V,
896 param: &'a GenericParam,
897) -> V::Result {
898 let GenericParam { id: _, ident, attrs, bounds, is_placeholder: _, kind, colon_span: _ } =
899 param;
900 walk_list!(visitor, visit_attribute, attrs);
901 try_visit!(visitor.visit_ident(ident));
902 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
903 match kind {
904 GenericParamKind::Lifetime => (),
905 GenericParamKind::Type { default } => visit_opt!(visitor, visit_ty, default),
906 GenericParamKind::Const { ty, default, kw_span: _ } => {
907 try_visit!(visitor.visit_ty(ty));
908 visit_opt!(visitor, visit_anon_const, default);
909 }
910 }
911 V::Result::output()
912}
913
914pub fn walk_generics<'a, V: Visitor<'a>>(visitor: &mut V, generics: &'a Generics) -> V::Result {
915 let Generics { params, where_clause, span: _ } = generics;
916 let WhereClause { has_where_token: _, predicates, span: _ } = where_clause;
917 walk_list!(visitor, visit_generic_param, params);
918 walk_list!(visitor, visit_where_predicate, predicates);
919 V::Result::output()
920}
921
922pub fn walk_closure_binder<'a, V: Visitor<'a>>(
923 visitor: &mut V,
924 binder: &'a ClosureBinder,
925) -> V::Result {
926 match binder {
927 ClosureBinder::NotPresent => {}
928 ClosureBinder::For { generic_params, span: _ } => {
929 walk_list!(visitor, visit_generic_param, generic_params)
930 }
931 }
932 V::Result::output()
933}
934
935pub fn walk_contract<'a, V: Visitor<'a>>(visitor: &mut V, c: &'a FnContract) -> V::Result {
936 let FnContract { requires, ensures } = c;
937 if let Some(pred) = requires {
938 visitor.visit_expr(pred);
939 }
940 if let Some(pred) = ensures {
941 visitor.visit_expr(pred);
942 }
943 V::Result::output()
944}
945
946pub fn walk_where_predicate<'a, V: Visitor<'a>>(
947 visitor: &mut V,
948 predicate: &'a WherePredicate,
949) -> V::Result {
950 let WherePredicate { attrs, kind, id: _, span: _, is_placeholder: _ } = predicate;
951 walk_list!(visitor, visit_attribute, attrs);
952 visitor.visit_where_predicate_kind(kind)
953}
954
955pub fn walk_where_predicate_kind<'a, V: Visitor<'a>>(
956 visitor: &mut V,
957 kind: &'a WherePredicateKind,
958) -> V::Result {
959 match kind {
960 WherePredicateKind::BoundPredicate(WhereBoundPredicate {
961 bounded_ty,
962 bounds,
963 bound_generic_params,
964 }) => {
965 walk_list!(visitor, visit_generic_param, bound_generic_params);
966 try_visit!(visitor.visit_ty(bounded_ty));
967 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
968 }
969 WherePredicateKind::RegionPredicate(WhereRegionPredicate { lifetime, bounds }) => {
970 try_visit!(visitor.visit_lifetime(lifetime, LifetimeCtxt::Bound));
971 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
972 }
973 WherePredicateKind::EqPredicate(WhereEqPredicate { lhs_ty, rhs_ty }) => {
974 try_visit!(visitor.visit_ty(lhs_ty));
975 try_visit!(visitor.visit_ty(rhs_ty));
976 }
977 }
978 V::Result::output()
979}
980
981pub fn walk_fn_ret_ty<'a, V: Visitor<'a>>(visitor: &mut V, ret_ty: &'a FnRetTy) -> V::Result {
982 match ret_ty {
983 FnRetTy::Default(_span) => {}
984 FnRetTy::Ty(output_ty) => try_visit!(visitor.visit_ty(output_ty)),
985 }
986 V::Result::output()
987}
988
989pub fn walk_fn_decl<'a, V: Visitor<'a>>(
990 visitor: &mut V,
991 FnDecl { inputs, output }: &'a FnDecl,
992) -> V::Result {
993 walk_list!(visitor, visit_param, inputs);
994 visitor.visit_fn_ret_ty(output)
995}
996
997pub fn walk_fn<'a, V: Visitor<'a>>(visitor: &mut V, kind: FnKind<'a>) -> V::Result {
998 match kind {
999 FnKind::Fn(
1000 _ctxt,
1001 _vis,
1002 Fn {
1003 defaultness: _,
1004 ident,
1005 sig: FnSig { header, decl, span: _ },
1006 generics,
1007 contract,
1008 body,
1009 define_opaque,
1010 },
1011 ) => {
1012 try_visit!(visitor.visit_ident(ident));
1014 try_visit!(visitor.visit_fn_header(header));
1015 try_visit!(visitor.visit_generics(generics));
1016 try_visit!(visitor.visit_fn_decl(decl));
1017 visit_opt!(visitor, visit_contract, contract);
1018 visit_opt!(visitor, visit_block, body);
1019 try_visit!(walk_define_opaques(visitor, define_opaque));
1020 }
1021 FnKind::Closure(binder, coroutine_kind, decl, body) => {
1022 try_visit!(visitor.visit_closure_binder(binder));
1023 visit_opt!(visitor, visit_coroutine_kind, coroutine_kind.as_ref());
1024 try_visit!(visitor.visit_fn_decl(decl));
1025 try_visit!(visitor.visit_expr(body));
1026 }
1027 }
1028 V::Result::output()
1029}
1030
1031impl WalkItemKind for AssocItemKind {
1032 type Ctxt = AssocCtxt;
1033 fn walk<'a, V: Visitor<'a>>(
1034 &'a self,
1035 span: Span,
1036 id: NodeId,
1037 vis: &'a Visibility,
1038 ctxt: Self::Ctxt,
1039 visitor: &mut V,
1040 ) -> V::Result {
1041 match self {
1042 AssocItemKind::Const(box ConstItem {
1043 defaultness: _,
1044 ident,
1045 generics,
1046 ty,
1047 expr,
1048 define_opaque,
1049 }) => {
1050 try_visit!(visitor.visit_ident(ident));
1051 try_visit!(visitor.visit_generics(generics));
1052 try_visit!(visitor.visit_ty(ty));
1053 visit_opt!(visitor, visit_expr, expr);
1054 try_visit!(walk_define_opaques(visitor, define_opaque));
1055 }
1056 AssocItemKind::Fn(func) => {
1057 let kind = FnKind::Fn(FnCtxt::Assoc(ctxt), vis, &*func);
1058 try_visit!(visitor.visit_fn(kind, span, id));
1059 }
1060 AssocItemKind::Type(box TyAlias {
1061 generics,
1062 ident,
1063 bounds,
1064 ty,
1065 defaultness: _,
1066 where_clauses: _,
1067 }) => {
1068 try_visit!(visitor.visit_generics(generics));
1069 try_visit!(visitor.visit_ident(ident));
1070 walk_list!(visitor, visit_param_bound, bounds, BoundKind::Bound);
1071 visit_opt!(visitor, visit_ty, ty);
1072 }
1073 AssocItemKind::MacCall(mac) => {
1074 try_visit!(visitor.visit_mac_call(mac));
1075 }
1076 AssocItemKind::Delegation(box Delegation {
1077 id,
1078 qself,
1079 path,
1080 ident,
1081 rename,
1082 body,
1083 from_glob: _,
1084 }) => {
1085 try_visit!(visitor.visit_qself(qself));
1086 try_visit!(visitor.visit_path(path, *id));
1087 try_visit!(visitor.visit_ident(ident));
1088 visit_opt!(visitor, visit_ident, rename);
1089 visit_opt!(visitor, visit_block, body);
1090 }
1091 AssocItemKind::DelegationMac(box DelegationMac { qself, prefix, suffixes, body }) => {
1092 try_visit!(visitor.visit_qself(qself));
1093 try_visit!(visitor.visit_path(prefix, id));
1094 if let Some(suffixes) = suffixes {
1095 for (ident, rename) in suffixes {
1096 visitor.visit_ident(ident);
1097 if let Some(rename) = rename {
1098 visitor.visit_ident(rename);
1099 }
1100 }
1101 }
1102 visit_opt!(visitor, visit_block, body);
1103 }
1104 }
1105 V::Result::output()
1106 }
1107}
1108
1109pub fn walk_item<'a, V: Visitor<'a>>(
1110 visitor: &mut V,
1111 item: &'a Item<impl WalkItemKind<Ctxt = ()>>,
1112) -> V::Result {
1113 walk_item_ctxt(visitor, item, ())
1114}
1115
1116pub fn walk_assoc_item<'a, V: Visitor<'a>>(
1117 visitor: &mut V,
1118 item: &'a AssocItem,
1119 ctxt: AssocCtxt,
1120) -> V::Result {
1121 walk_item_ctxt(visitor, item, ctxt)
1122}
1123
1124fn walk_item_ctxt<'a, V: Visitor<'a>, K: WalkItemKind>(
1125 visitor: &mut V,
1126 item: &'a Item<K>,
1127 ctxt: K::Ctxt,
1128) -> V::Result {
1129 let Item { id, span, vis, attrs, kind, tokens: _ } = item;
1130 walk_list!(visitor, visit_attribute, attrs);
1131 try_visit!(visitor.visit_vis(vis));
1132 try_visit!(kind.walk(*span, *id, vis, ctxt, visitor));
1133 V::Result::output()
1134}
1135
1136pub fn walk_struct_def<'a, V: Visitor<'a>>(
1137 visitor: &mut V,
1138 struct_definition: &'a VariantData,
1139) -> V::Result {
1140 walk_list!(visitor, visit_field_def, struct_definition.fields());
1141 V::Result::output()
1142}
1143
1144pub fn walk_field_def<'a, V: Visitor<'a>>(visitor: &mut V, field: &'a FieldDef) -> V::Result {
1145 let FieldDef { attrs, id: _, span: _, vis, ident, ty, is_placeholder: _, safety: _, default } =
1146 field;
1147 walk_list!(visitor, visit_attribute, attrs);
1148 try_visit!(visitor.visit_vis(vis));
1149 visit_opt!(visitor, visit_ident, ident);
1150 try_visit!(visitor.visit_ty(ty));
1151 visit_opt!(visitor, visit_anon_const, &*default);
1152 V::Result::output()
1153}
1154
1155pub fn walk_block<'a, V: Visitor<'a>>(visitor: &mut V, block: &'a Block) -> V::Result {
1156 let Block { stmts, id: _, rules: _, span: _, tokens: _ } = block;
1157 walk_list!(visitor, visit_stmt, stmts);
1158 V::Result::output()
1159}
1160
1161pub fn walk_stmt<'a, V: Visitor<'a>>(visitor: &mut V, statement: &'a Stmt) -> V::Result {
1162 let Stmt { id: _, kind, span: _ } = statement;
1163 match kind {
1164 StmtKind::Let(local) => try_visit!(visitor.visit_local(local)),
1165 StmtKind::Item(item) => try_visit!(visitor.visit_item(item)),
1166 StmtKind::Expr(expr) | StmtKind::Semi(expr) => try_visit!(visitor.visit_expr(expr)),
1167 StmtKind::Empty => {}
1168 StmtKind::MacCall(mac) => {
1169 let MacCallStmt { mac, attrs, style: _, tokens: _ } = &**mac;
1170 walk_list!(visitor, visit_attribute, attrs);
1171 try_visit!(visitor.visit_mac_call(mac));
1172 }
1173 }
1174 V::Result::output()
1175}
1176
1177pub fn walk_mac<'a, V: Visitor<'a>>(visitor: &mut V, mac: &'a MacCall) -> V::Result {
1178 let MacCall { path, args: _ } = mac;
1179 visitor.visit_path(path, DUMMY_NODE_ID)
1180}
1181
1182pub fn walk_anon_const<'a, V: Visitor<'a>>(visitor: &mut V, constant: &'a AnonConst) -> V::Result {
1183 let AnonConst { id: _, value } = constant;
1184 visitor.visit_expr(value)
1185}
1186
1187pub fn walk_inline_asm<'a, V: Visitor<'a>>(visitor: &mut V, asm: &'a InlineAsm) -> V::Result {
1188 let InlineAsm {
1189 asm_macro: _,
1190 template: _,
1191 template_strs: _,
1192 operands,
1193 clobber_abis: _,
1194 options: _,
1195 line_spans: _,
1196 } = asm;
1197 for (op, _span) in operands {
1198 match op {
1199 InlineAsmOperand::In { expr, reg: _ }
1200 | InlineAsmOperand::Out { expr: Some(expr), reg: _, late: _ }
1201 | InlineAsmOperand::InOut { expr, reg: _, late: _ } => {
1202 try_visit!(visitor.visit_expr(expr))
1203 }
1204 InlineAsmOperand::Out { expr: None, reg: _, late: _ } => {}
1205 InlineAsmOperand::SplitInOut { in_expr, out_expr, reg: _, late: _ } => {
1206 try_visit!(visitor.visit_expr(in_expr));
1207 visit_opt!(visitor, visit_expr, out_expr);
1208 }
1209 InlineAsmOperand::Const { anon_const } => {
1210 try_visit!(visitor.visit_anon_const(anon_const))
1211 }
1212 InlineAsmOperand::Sym { sym } => try_visit!(visitor.visit_inline_asm_sym(sym)),
1213 InlineAsmOperand::Label { block } => try_visit!(visitor.visit_block(block)),
1214 }
1215 }
1216 V::Result::output()
1217}
1218
1219pub fn walk_inline_asm_sym<'a, V: Visitor<'a>>(
1220 visitor: &mut V,
1221 InlineAsmSym { id, qself, path }: &'a InlineAsmSym,
1222) -> V::Result {
1223 try_visit!(visitor.visit_qself(qself));
1224 visitor.visit_path(path, *id)
1225}
1226
1227pub fn walk_format_args<'a, V: Visitor<'a>>(visitor: &mut V, fmt: &'a FormatArgs) -> V::Result {
1228 let FormatArgs { span: _, template: _, arguments, uncooked_fmt_str: _ } = fmt;
1229 for FormatArgument { kind, expr } in arguments.all_args() {
1230 match kind {
1231 FormatArgumentKind::Named(ident) | FormatArgumentKind::Captured(ident) => {
1232 try_visit!(visitor.visit_ident(ident))
1233 }
1234 FormatArgumentKind::Normal => {}
1235 }
1236 try_visit!(visitor.visit_expr(expr));
1237 }
1238 V::Result::output()
1239}
1240
1241pub fn walk_expr<'a, V: Visitor<'a>>(visitor: &mut V, expression: &'a Expr) -> V::Result {
1242 let Expr { id, kind, span, attrs, tokens: _ } = expression;
1243 walk_list!(visitor, visit_attribute, attrs);
1244 match kind {
1245 ExprKind::Array(subexpressions) => {
1246 walk_list!(visitor, visit_expr, subexpressions);
1247 }
1248 ExprKind::ConstBlock(anon_const) => try_visit!(visitor.visit_anon_const(anon_const)),
1249 ExprKind::Repeat(element, count) => {
1250 try_visit!(visitor.visit_expr(element));
1251 try_visit!(visitor.visit_anon_const(count));
1252 }
1253 ExprKind::Struct(se) => {
1254 let StructExpr { qself, path, fields, rest } = &**se;
1255 try_visit!(visitor.visit_qself(qself));
1256 try_visit!(visitor.visit_path(path, *id));
1257 walk_list!(visitor, visit_expr_field, fields);
1258 match rest {
1259 StructRest::Base(expr) => try_visit!(visitor.visit_expr(expr)),
1260 StructRest::Rest(_span) => {}
1261 StructRest::None => {}
1262 }
1263 }
1264 ExprKind::Tup(subexpressions) => {
1265 walk_list!(visitor, visit_expr, subexpressions);
1266 }
1267 ExprKind::Call(callee_expression, arguments) => {
1268 try_visit!(visitor.visit_expr(callee_expression));
1269 walk_list!(visitor, visit_expr, arguments);
1270 }
1271 ExprKind::MethodCall(box MethodCall { seg, receiver, args, span: _ }) => {
1272 try_visit!(visitor.visit_expr(receiver));
1273 try_visit!(visitor.visit_path_segment(seg));
1274 walk_list!(visitor, visit_expr, args);
1275 }
1276 ExprKind::Binary(_op, left_expression, right_expression) => {
1277 try_visit!(visitor.visit_expr(left_expression));
1278 try_visit!(visitor.visit_expr(right_expression));
1279 }
1280 ExprKind::AddrOf(_kind, _mutbl, subexpression) => {
1281 try_visit!(visitor.visit_expr(subexpression));
1282 }
1283 ExprKind::Unary(_op, subexpression) => {
1284 try_visit!(visitor.visit_expr(subexpression));
1285 }
1286 ExprKind::Cast(subexpression, typ) | ExprKind::Type(subexpression, typ) => {
1287 try_visit!(visitor.visit_expr(subexpression));
1288 try_visit!(visitor.visit_ty(typ));
1289 }
1290 ExprKind::Let(pat, expr, _span, _recovered) => {
1291 try_visit!(visitor.visit_pat(pat));
1292 try_visit!(visitor.visit_expr(expr));
1293 }
1294 ExprKind::If(head_expression, if_block, optional_else) => {
1295 try_visit!(visitor.visit_expr(head_expression));
1296 try_visit!(visitor.visit_block(if_block));
1297 visit_opt!(visitor, visit_expr, optional_else);
1298 }
1299 ExprKind::While(subexpression, block, opt_label) => {
1300 visit_opt!(visitor, visit_label, opt_label);
1301 try_visit!(visitor.visit_expr(subexpression));
1302 try_visit!(visitor.visit_block(block));
1303 }
1304 ExprKind::ForLoop { pat, iter, body, label, kind: _ } => {
1305 visit_opt!(visitor, visit_label, label);
1306 try_visit!(visitor.visit_pat(pat));
1307 try_visit!(visitor.visit_expr(iter));
1308 try_visit!(visitor.visit_block(body));
1309 }
1310 ExprKind::Loop(block, opt_label, _span) => {
1311 visit_opt!(visitor, visit_label, opt_label);
1312 try_visit!(visitor.visit_block(block));
1313 }
1314 ExprKind::Match(subexpression, arms, _kind) => {
1315 try_visit!(visitor.visit_expr(subexpression));
1316 walk_list!(visitor, visit_arm, arms);
1317 }
1318 ExprKind::Closure(box Closure {
1319 binder,
1320 capture_clause,
1321 coroutine_kind,
1322 constness: _,
1323 movability: _,
1324 fn_decl,
1325 body,
1326 fn_decl_span: _,
1327 fn_arg_span: _,
1328 }) => {
1329 try_visit!(visitor.visit_capture_by(capture_clause));
1330 try_visit!(visitor.visit_fn(
1331 FnKind::Closure(binder, coroutine_kind, fn_decl, body),
1332 *span,
1333 *id
1334 ));
1335 }
1336 ExprKind::Block(block, opt_label) => {
1337 visit_opt!(visitor, visit_label, opt_label);
1338 try_visit!(visitor.visit_block(block));
1339 }
1340 ExprKind::Gen(_capt, body, _kind, _decl_span) => try_visit!(visitor.visit_block(body)),
1341 ExprKind::Await(expr, _span) => try_visit!(visitor.visit_expr(expr)),
1342 ExprKind::Use(expr, _span) => try_visit!(visitor.visit_expr(expr)),
1343 ExprKind::Assign(lhs, rhs, _span) => {
1344 try_visit!(visitor.visit_expr(lhs));
1345 try_visit!(visitor.visit_expr(rhs));
1346 }
1347 ExprKind::AssignOp(_op, left_expression, right_expression) => {
1348 try_visit!(visitor.visit_expr(left_expression));
1349 try_visit!(visitor.visit_expr(right_expression));
1350 }
1351 ExprKind::Field(subexpression, ident) => {
1352 try_visit!(visitor.visit_expr(subexpression));
1353 try_visit!(visitor.visit_ident(ident));
1354 }
1355 ExprKind::Index(main_expression, index_expression, _span) => {
1356 try_visit!(visitor.visit_expr(main_expression));
1357 try_visit!(visitor.visit_expr(index_expression));
1358 }
1359 ExprKind::Range(start, end, _limit) => {
1360 visit_opt!(visitor, visit_expr, start);
1361 visit_opt!(visitor, visit_expr, end);
1362 }
1363 ExprKind::Underscore => {}
1364 ExprKind::Path(maybe_qself, path) => {
1365 try_visit!(visitor.visit_qself(maybe_qself));
1366 try_visit!(visitor.visit_path(path, *id));
1367 }
1368 ExprKind::Break(opt_label, opt_expr) => {
1369 visit_opt!(visitor, visit_label, opt_label);
1370 visit_opt!(visitor, visit_expr, opt_expr);
1371 }
1372 ExprKind::Continue(opt_label) => {
1373 visit_opt!(visitor, visit_label, opt_label);
1374 }
1375 ExprKind::Ret(optional_expression) => {
1376 visit_opt!(visitor, visit_expr, optional_expression);
1377 }
1378 ExprKind::Yeet(optional_expression) => {
1379 visit_opt!(visitor, visit_expr, optional_expression);
1380 }
1381 ExprKind::Become(expr) => try_visit!(visitor.visit_expr(expr)),
1382 ExprKind::MacCall(mac) => try_visit!(visitor.visit_mac_call(mac)),
1383 ExprKind::Paren(subexpression) => try_visit!(visitor.visit_expr(subexpression)),
1384 ExprKind::InlineAsm(asm) => try_visit!(visitor.visit_inline_asm(asm)),
1385 ExprKind::FormatArgs(f) => try_visit!(visitor.visit_format_args(f)),
1386 ExprKind::OffsetOf(container, fields) => {
1387 try_visit!(visitor.visit_ty(container));
1388 walk_list!(visitor, visit_ident, fields.iter());
1389 }
1390 ExprKind::Yield(kind) => {
1391 visit_opt!(visitor, visit_expr, kind.expr());
1392 }
1393 ExprKind::Try(subexpression) => try_visit!(visitor.visit_expr(subexpression)),
1394 ExprKind::TryBlock(body) => try_visit!(visitor.visit_block(body)),
1395 ExprKind::Lit(_token) => {}
1396 ExprKind::IncludedBytes(_bytes) => {}
1397 ExprKind::UnsafeBinderCast(_kind, expr, ty) => {
1398 try_visit!(visitor.visit_expr(expr));
1399 visit_opt!(visitor, visit_ty, ty);
1400 }
1401 ExprKind::Err(_guar) => {}
1402 ExprKind::Dummy => {}
1403 }
1404
1405 V::Result::output()
1406}
1407
1408pub fn walk_param<'a, V: Visitor<'a>>(visitor: &mut V, param: &'a Param) -> V::Result {
1409 let Param { attrs, ty, pat, id: _, span: _, is_placeholder: _ } = param;
1410 walk_list!(visitor, visit_attribute, attrs);
1411 try_visit!(visitor.visit_pat(pat));
1412 try_visit!(visitor.visit_ty(ty));
1413 V::Result::output()
1414}
1415
1416pub fn walk_arm<'a, V: Visitor<'a>>(visitor: &mut V, arm: &'a Arm) -> V::Result {
1417 let Arm { attrs, pat, guard, body, span: _, id: _, is_placeholder: _ } = arm;
1418 walk_list!(visitor, visit_attribute, attrs);
1419 try_visit!(visitor.visit_pat(pat));
1420 visit_opt!(visitor, visit_expr, guard);
1421 visit_opt!(visitor, visit_expr, body);
1422 V::Result::output()
1423}
1424
1425pub fn walk_vis<'a, V: Visitor<'a>>(visitor: &mut V, vis: &'a Visibility) -> V::Result {
1426 let Visibility { kind, span: _, tokens: _ } = vis;
1427 match kind {
1428 VisibilityKind::Restricted { path, id, shorthand: _ } => {
1429 try_visit!(visitor.visit_path(path, *id));
1430 }
1431 VisibilityKind::Public | VisibilityKind::Inherited => {}
1432 }
1433 V::Result::output()
1434}
1435
1436pub fn walk_attribute<'a, V: Visitor<'a>>(visitor: &mut V, attr: &'a Attribute) -> V::Result {
1437 let Attribute { kind, id: _, style: _, span: _ } = attr;
1438 match kind {
1439 AttrKind::Normal(normal) => {
1440 let NormalAttr { item, tokens: _ } = &**normal;
1441 let AttrItem { unsafety: _, path, args, tokens: _ } = item;
1442 try_visit!(visitor.visit_path(path, DUMMY_NODE_ID));
1443 try_visit!(walk_attr_args(visitor, args));
1444 }
1445 AttrKind::DocComment(_kind, _sym) => {}
1446 }
1447 V::Result::output()
1448}
1449
1450pub fn walk_attr_args<'a, V: Visitor<'a>>(visitor: &mut V, args: &'a AttrArgs) -> V::Result {
1451 match args {
1452 AttrArgs::Empty => {}
1453 AttrArgs::Delimited(_args) => {}
1454 AttrArgs::Eq { expr, .. } => try_visit!(visitor.visit_expr(expr)),
1455 }
1456 V::Result::output()
1457}
1458
1459fn walk_define_opaques<'a, V: Visitor<'a>>(
1460 visitor: &mut V,
1461 define_opaque: &'a Option<ThinVec<(NodeId, Path)>>,
1462) -> V::Result {
1463 if let Some(define_opaque) = define_opaque {
1464 for (id, path) in define_opaque {
1465 try_visit!(visitor.visit_path(path, *id));
1466 }
1467 }
1468 V::Result::output()
1469}