1 //! Utilities for manipulating and extracting information from `rustc_ast::ast`.
3 //! - The `eq_foobar` functions test for semantic equality but ignores `NodeId`s and `Span`s.
5 #![allow(clippy::similar_names, clippy::wildcard_imports, clippy::enum_glob_use)]
7 use crate::{both, over};
9 use rustc_ast::{self as ast, *};
10 use rustc_span::symbol::Ident;
14 pub use ident_iter::IdentIter;
16 pub fn is_useless_with_eq_exprs(kind: BinOpKind) -> bool {
20 Sub | Div | Eq | Lt | Le | Gt | Ge | Ne | And | Or | BitXor | BitAnd | BitOr
24 /// Checks if each element in the first slice is contained within the latter as per `eq_fn`.
25 pub fn unordered_over<X>(left: &[X], right: &[X], mut eq_fn: impl FnMut(&X, &X) -> bool) -> bool {
26 left.len() == right.len() && left.iter().all(|l| right.iter().any(|r| eq_fn(l, r)))
29 pub fn eq_id(l: Ident, r: Ident) -> bool {
33 pub fn eq_pat(l: &Pat, r: &Pat) -> bool {
35 match (&l.kind, &r.kind) {
36 (Paren(l), _) => eq_pat(l, r),
37 (_, Paren(r)) => eq_pat(l, r),
38 (Wild, Wild) | (Rest, Rest) => true,
39 (Lit(l), Lit(r)) => eq_expr(l, r),
40 (Ident(b1, i1, s1), Ident(b2, i2, s2)) => b1 == b2 && eq_id(*i1, *i2) && both(s1, s2, |l, r| eq_pat(l, r)),
41 (Range(lf, lt, le), Range(rf, rt, re)) => {
42 eq_expr_opt(lf, rf) && eq_expr_opt(lt, rt) && eq_range_end(&le.node, &re.node)
45 | (Ref(l, Mutability::Not), Ref(r, Mutability::Not))
46 | (Ref(l, Mutability::Mut), Ref(r, Mutability::Mut)) => eq_pat(l, r),
47 (Tuple(l), Tuple(r)) | (Slice(l), Slice(r)) => over(l, r, |l, r| eq_pat(l, r)),
48 (Path(lq, lp), Path(rq, rp)) => both(lq, rq, eq_qself) && eq_path(lp, rp),
49 (TupleStruct(lqself, lp, lfs), TupleStruct(rqself, rp, rfs)) => {
50 eq_maybe_qself(lqself, rqself) && eq_path(lp, rp) && over(lfs, rfs, |l, r| eq_pat(l, r))
52 (Struct(lqself, lp, lfs, lr), Struct(rqself, rp, rfs, rr)) => {
53 lr == rr && eq_maybe_qself(lqself, rqself) && eq_path(lp, rp) && unordered_over(lfs, rfs, eq_field_pat)
55 (Or(ls), Or(rs)) => unordered_over(ls, rs, |l, r| eq_pat(l, r)),
56 (MacCall(l), MacCall(r)) => eq_mac_call(l, r),
61 pub fn eq_range_end(l: &RangeEnd, r: &RangeEnd) -> bool {
63 (RangeEnd::Excluded, RangeEnd::Excluded) => true,
64 (RangeEnd::Included(l), RangeEnd::Included(r)) => {
65 matches!(l, RangeSyntax::DotDotEq) == matches!(r, RangeSyntax::DotDotEq)
71 pub fn eq_field_pat(l: &PatField, r: &PatField) -> bool {
72 l.is_placeholder == r.is_placeholder
73 && eq_id(l.ident, r.ident)
74 && eq_pat(&l.pat, &r.pat)
75 && over(&l.attrs, &r.attrs, eq_attr)
78 pub fn eq_qself(l: &P<QSelf>, r: &P<QSelf>) -> bool {
79 l.position == r.position && eq_ty(&l.ty, &r.ty)
82 pub fn eq_maybe_qself(l: &Option<P<QSelf>>, r: &Option<P<QSelf>>) -> bool {
84 (Some(l), Some(r)) => eq_qself(l, r),
90 pub fn eq_path(l: &Path, r: &Path) -> bool {
91 over(&l.segments, &r.segments, eq_path_seg)
94 pub fn eq_path_seg(l: &PathSegment, r: &PathSegment) -> bool {
95 eq_id(l.ident, r.ident) && both(&l.args, &r.args, |l, r| eq_generic_args(l, r))
98 pub fn eq_generic_args(l: &GenericArgs, r: &GenericArgs) -> bool {
100 (GenericArgs::AngleBracketed(l), GenericArgs::AngleBracketed(r)) => over(&l.args, &r.args, eq_angle_arg),
101 (GenericArgs::Parenthesized(l), GenericArgs::Parenthesized(r)) => {
102 over(&l.inputs, &r.inputs, |l, r| eq_ty(l, r)) && eq_fn_ret_ty(&l.output, &r.output)
108 pub fn eq_angle_arg(l: &AngleBracketedArg, r: &AngleBracketedArg) -> bool {
110 (AngleBracketedArg::Arg(l), AngleBracketedArg::Arg(r)) => eq_generic_arg(l, r),
111 (AngleBracketedArg::Constraint(l), AngleBracketedArg::Constraint(r)) => eq_assoc_constraint(l, r),
116 pub fn eq_generic_arg(l: &GenericArg, r: &GenericArg) -> bool {
118 (GenericArg::Lifetime(l), GenericArg::Lifetime(r)) => eq_id(l.ident, r.ident),
119 (GenericArg::Type(l), GenericArg::Type(r)) => eq_ty(l, r),
120 (GenericArg::Const(l), GenericArg::Const(r)) => eq_expr(&l.value, &r.value),
125 pub fn eq_expr_opt(l: &Option<P<Expr>>, r: &Option<P<Expr>>) -> bool {
126 both(l, r, |l, r| eq_expr(l, r))
129 pub fn eq_struct_rest(l: &StructRest, r: &StructRest) -> bool {
131 (StructRest::Base(lb), StructRest::Base(rb)) => eq_expr(lb, rb),
132 (StructRest::Rest(_), StructRest::Rest(_)) | (StructRest::None, StructRest::None) => true,
137 pub fn eq_expr(l: &Expr, r: &Expr) -> bool {
139 if !over(&l.attrs, &r.attrs, eq_attr) {
142 match (&l.kind, &r.kind) {
143 (Paren(l), _) => eq_expr(l, r),
144 (_, Paren(r)) => eq_expr(l, r),
146 (Box(l), Box(r)) | (Try(l), Try(r)) | (Await(l), Await(r)) => eq_expr(l, r),
147 (Array(l), Array(r)) | (Tup(l), Tup(r)) => over(l, r, |l, r| eq_expr(l, r)),
148 (Repeat(le, ls), Repeat(re, rs)) => eq_expr(le, re) && eq_expr(&ls.value, &rs.value),
149 (Call(lc, la), Call(rc, ra)) => eq_expr(lc, rc) && over(la, ra, |l, r| eq_expr(l, r)),
151 MethodCall(box ast::MethodCall {
157 MethodCall(box ast::MethodCall {
163 ) => eq_path_seg(ls, rs) && eq_expr(lr, rr) && over(la, ra, |l, r| eq_expr(l, r)),
164 (Binary(lo, ll, lr), Binary(ro, rl, rr)) => lo.node == ro.node && eq_expr(ll, rl) && eq_expr(lr, rr),
165 (Unary(lo, l), Unary(ro, r)) => mem::discriminant(lo) == mem::discriminant(ro) && eq_expr(l, r),
166 (Lit(l), Lit(r)) => l == r,
167 (Cast(l, lt), Cast(r, rt)) | (Type(l, lt), Type(r, rt)) => eq_expr(l, r) && eq_ty(lt, rt),
168 (Let(lp, le, _), Let(rp, re, _)) => eq_pat(lp, rp) && eq_expr(le, re),
169 (If(lc, lt, le), If(rc, rt, re)) => eq_expr(lc, rc) && eq_block(lt, rt) && eq_expr_opt(le, re),
170 (While(lc, lt, ll), While(rc, rt, rl)) => eq_label(ll, rl) && eq_expr(lc, rc) && eq_block(lt, rt),
171 (ForLoop(lp, li, lt, ll), ForLoop(rp, ri, rt, rl)) => {
172 eq_label(ll, rl) && eq_pat(lp, rp) && eq_expr(li, ri) && eq_block(lt, rt)
174 (Loop(lt, ll), Loop(rt, rl)) => eq_label(ll, rl) && eq_block(lt, rt),
175 (Block(lb, ll), Block(rb, rl)) => eq_label(ll, rl) && eq_block(lb, rb),
176 (TryBlock(l), TryBlock(r)) => eq_block(l, r),
177 (Yield(l), Yield(r)) | (Ret(l), Ret(r)) => eq_expr_opt(l, r),
178 (Break(ll, le), Break(rl, re)) => eq_label(ll, rl) && eq_expr_opt(le, re),
179 (Continue(ll), Continue(rl)) => eq_label(ll, rl),
180 (Assign(l1, l2, _), Assign(r1, r2, _)) | (Index(l1, l2), Index(r1, r2)) => eq_expr(l1, r1) && eq_expr(l2, r2),
181 (AssignOp(lo, lp, lv), AssignOp(ro, rp, rv)) => lo.node == ro.node && eq_expr(lp, rp) && eq_expr(lv, rv),
182 (Field(lp, lf), Field(rp, rf)) => eq_id(*lf, *rf) && eq_expr(lp, rp),
183 (Match(ls, la), Match(rs, ra)) => eq_expr(ls, rs) && over(la, ra, eq_arm),
185 Closure(box ast::Closure {
194 Closure(box ast::Closure {
204 eq_closure_binder(lb, rb)
206 && la.is_async() == ra.is_async()
208 && eq_fn_decl(lf, rf)
211 (Async(lc, _, lb), Async(rc, _, rb)) => lc == rc && eq_block(lb, rb),
212 (Range(lf, lt, ll), Range(rf, rt, rl)) => ll == rl && eq_expr_opt(lf, rf) && eq_expr_opt(lt, rt),
213 (AddrOf(lbk, lm, le), AddrOf(rbk, rm, re)) => lbk == rbk && lm == rm && eq_expr(le, re),
214 (Path(lq, lp), Path(rq, rp)) => both(lq, rq, eq_qself) && eq_path(lp, rp),
215 (MacCall(l), MacCall(r)) => eq_mac_call(l, r),
216 (Struct(lse), Struct(rse)) => {
217 eq_maybe_qself(&lse.qself, &rse.qself)
218 && eq_path(&lse.path, &rse.path)
219 && eq_struct_rest(&lse.rest, &rse.rest)
220 && unordered_over(&lse.fields, &rse.fields, eq_field)
226 pub fn eq_field(l: &ExprField, r: &ExprField) -> bool {
227 l.is_placeholder == r.is_placeholder
228 && eq_id(l.ident, r.ident)
229 && eq_expr(&l.expr, &r.expr)
230 && over(&l.attrs, &r.attrs, eq_attr)
233 pub fn eq_arm(l: &Arm, r: &Arm) -> bool {
234 l.is_placeholder == r.is_placeholder
235 && eq_pat(&l.pat, &r.pat)
236 && eq_expr(&l.body, &r.body)
237 && eq_expr_opt(&l.guard, &r.guard)
238 && over(&l.attrs, &r.attrs, eq_attr)
241 pub fn eq_label(l: &Option<Label>, r: &Option<Label>) -> bool {
242 both(l, r, |l, r| eq_id(l.ident, r.ident))
245 pub fn eq_block(l: &Block, r: &Block) -> bool {
246 l.rules == r.rules && over(&l.stmts, &r.stmts, eq_stmt)
249 pub fn eq_stmt(l: &Stmt, r: &Stmt) -> bool {
251 match (&l.kind, &r.kind) {
252 (Local(l), Local(r)) => {
253 eq_pat(&l.pat, &r.pat)
254 && both(&l.ty, &r.ty, |l, r| eq_ty(l, r))
255 && eq_local_kind(&l.kind, &r.kind)
256 && over(&l.attrs, &r.attrs, eq_attr)
258 (Item(l), Item(r)) => eq_item(l, r, eq_item_kind),
259 (Expr(l), Expr(r)) | (Semi(l), Semi(r)) => eq_expr(l, r),
260 (Empty, Empty) => true,
261 (MacCall(l), MacCall(r)) => {
262 l.style == r.style && eq_mac_call(&l.mac, &r.mac) && over(&l.attrs, &r.attrs, eq_attr)
268 pub fn eq_local_kind(l: &LocalKind, r: &LocalKind) -> bool {
271 (Decl, Decl) => true,
272 (Init(l), Init(r)) => eq_expr(l, r),
273 (InitElse(li, le), InitElse(ri, re)) => eq_expr(li, ri) && eq_block(le, re),
278 pub fn eq_item<K>(l: &Item<K>, r: &Item<K>, mut eq_kind: impl FnMut(&K, &K) -> bool) -> bool {
279 eq_id(l.ident, r.ident) && over(&l.attrs, &r.attrs, eq_attr) && eq_vis(&l.vis, &r.vis) && eq_kind(&l.kind, &r.kind)
282 #[expect(clippy::too_many_lines)] // Just a big match statement
283 pub fn eq_item_kind(l: &ItemKind, r: &ItemKind) -> bool {
286 (ExternCrate(l), ExternCrate(r)) => l == r,
287 (Use(l), Use(r)) => eq_use_tree(l, r),
288 (Static(lt, lm, le), Static(rt, rm, re)) => lm == rm && eq_ty(lt, rt) && eq_expr_opt(le, re),
289 (Const(ld, lt, le), Const(rd, rt, re)) => eq_defaultness(*ld, *rd) && eq_ty(lt, rt) && eq_expr_opt(le, re),
304 eq_defaultness(*ld, *rd) && eq_fn_sig(lf, rf) && eq_generics(lg, rg) && both(lb, rb, |l, r| eq_block(l, r))
306 (Mod(lu, lmk), Mod(ru, rmk)) => {
308 && match (lmk, rmk) {
309 (ModKind::Loaded(litems, linline, _), ModKind::Loaded(ritems, rinline, _)) => {
310 linline == rinline && over(litems, ritems, |l, r| eq_item(l, r, eq_item_kind))
312 (ModKind::Unloaded, ModKind::Unloaded) => true,
316 (ForeignMod(l), ForeignMod(r)) => {
317 both(&l.abi, &r.abi, eq_str_lit) && over(&l.items, &r.items, |l, r| eq_item(l, r, eq_foreign_item_kind))
320 TyAlias(box ast::TyAlias {
327 TyAlias(box ast::TyAlias {
335 eq_defaultness(*ld, *rd)
336 && eq_generics(lg, rg)
337 && over(lb, rb, eq_generic_bound)
338 && both(lt, rt, |l, r| eq_ty(l, r))
340 (Enum(le, lg), Enum(re, rg)) => over(&le.variants, &re.variants, eq_variant) && eq_generics(lg, rg),
341 (Struct(lv, lg), Struct(rv, rg)) | (Union(lv, lg), Union(rv, rg)) => {
342 eq_variant_data(lv, rv) && eq_generics(lg, rg)
345 Trait(box ast::Trait {
352 Trait(box ast::Trait {
361 && matches!(lu, Unsafe::No) == matches!(ru, Unsafe::No)
362 && eq_generics(lg, rg)
363 && over(lb, rb, eq_generic_bound)
364 && over(li, ri, |l, r| eq_item(l, r, eq_assoc_item_kind))
366 (TraitAlias(lg, lb), TraitAlias(rg, rb)) => eq_generics(lg, rg) && over(lb, rb, eq_generic_bound),
389 matches!(lu, Unsafe::No) == matches!(ru, Unsafe::No)
390 && matches!(lp, ImplPolarity::Positive) == matches!(rp, ImplPolarity::Positive)
391 && eq_defaultness(*ld, *rd)
392 && matches!(lc, ast::Const::No) == matches!(rc, ast::Const::No)
393 && eq_generics(lg, rg)
394 && both(lot, rot, |l, r| eq_path(&l.path, &r.path))
396 && over(li, ri, |l, r| eq_item(l, r, eq_assoc_item_kind))
398 (MacCall(l), MacCall(r)) => eq_mac_call(l, r),
399 (MacroDef(l), MacroDef(r)) => l.macro_rules == r.macro_rules && eq_mac_args(&l.body, &r.body),
404 pub fn eq_foreign_item_kind(l: &ForeignItemKind, r: &ForeignItemKind) -> bool {
405 use ForeignItemKind::*;
407 (Static(lt, lm, le), Static(rt, rm, re)) => lm == rm && eq_ty(lt, rt) && eq_expr_opt(le, re),
422 eq_defaultness(*ld, *rd) && eq_fn_sig(lf, rf) && eq_generics(lg, rg) && both(lb, rb, |l, r| eq_block(l, r))
425 TyAlias(box ast::TyAlias {
432 TyAlias(box ast::TyAlias {
440 eq_defaultness(*ld, *rd)
441 && eq_generics(lg, rg)
442 && over(lb, rb, eq_generic_bound)
443 && both(lt, rt, |l, r| eq_ty(l, r))
445 (MacCall(l), MacCall(r)) => eq_mac_call(l, r),
450 pub fn eq_assoc_item_kind(l: &AssocItemKind, r: &AssocItemKind) -> bool {
451 use AssocItemKind::*;
453 (Const(ld, lt, le), Const(rd, rt, re)) => eq_defaultness(*ld, *rd) && eq_ty(lt, rt) && eq_expr_opt(le, re),
468 eq_defaultness(*ld, *rd) && eq_fn_sig(lf, rf) && eq_generics(lg, rg) && both(lb, rb, |l, r| eq_block(l, r))
471 Type(box ast::TyAlias {
478 Type(box ast::TyAlias {
486 eq_defaultness(*ld, *rd)
487 && eq_generics(lg, rg)
488 && over(lb, rb, eq_generic_bound)
489 && both(lt, rt, |l, r| eq_ty(l, r))
491 (MacCall(l), MacCall(r)) => eq_mac_call(l, r),
496 pub fn eq_variant(l: &Variant, r: &Variant) -> bool {
497 l.is_placeholder == r.is_placeholder
498 && over(&l.attrs, &r.attrs, eq_attr)
499 && eq_vis(&l.vis, &r.vis)
500 && eq_id(l.ident, r.ident)
501 && eq_variant_data(&l.data, &r.data)
502 && both(&l.disr_expr, &r.disr_expr, |l, r| eq_expr(&l.value, &r.value))
505 pub fn eq_variant_data(l: &VariantData, r: &VariantData) -> bool {
508 (Unit(_), Unit(_)) => true,
509 (Struct(l, _), Struct(r, _)) | (Tuple(l, _), Tuple(r, _)) => over(l, r, eq_struct_field),
514 pub fn eq_struct_field(l: &FieldDef, r: &FieldDef) -> bool {
515 l.is_placeholder == r.is_placeholder
516 && over(&l.attrs, &r.attrs, eq_attr)
517 && eq_vis(&l.vis, &r.vis)
518 && both(&l.ident, &r.ident, |l, r| eq_id(*l, *r))
519 && eq_ty(&l.ty, &r.ty)
522 pub fn eq_fn_sig(l: &FnSig, r: &FnSig) -> bool {
523 eq_fn_decl(&l.decl, &r.decl) && eq_fn_header(&l.header, &r.header)
526 pub fn eq_fn_header(l: &FnHeader, r: &FnHeader) -> bool {
527 matches!(l.unsafety, Unsafe::No) == matches!(r.unsafety, Unsafe::No)
528 && l.asyncness.is_async() == r.asyncness.is_async()
529 && matches!(l.constness, Const::No) == matches!(r.constness, Const::No)
530 && eq_ext(&l.ext, &r.ext)
533 pub fn eq_generics(l: &Generics, r: &Generics) -> bool {
534 over(&l.params, &r.params, eq_generic_param)
535 && over(&l.where_clause.predicates, &r.where_clause.predicates, |l, r| {
536 eq_where_predicate(l, r)
540 pub fn eq_where_predicate(l: &WherePredicate, r: &WherePredicate) -> bool {
541 use WherePredicate::*;
543 (BoundPredicate(l), BoundPredicate(r)) => {
544 over(&l.bound_generic_params, &r.bound_generic_params, |l, r| {
545 eq_generic_param(l, r)
546 }) && eq_ty(&l.bounded_ty, &r.bounded_ty)
547 && over(&l.bounds, &r.bounds, eq_generic_bound)
549 (RegionPredicate(l), RegionPredicate(r)) => {
550 eq_id(l.lifetime.ident, r.lifetime.ident) && over(&l.bounds, &r.bounds, eq_generic_bound)
552 (EqPredicate(l), EqPredicate(r)) => eq_ty(&l.lhs_ty, &r.lhs_ty) && eq_ty(&l.rhs_ty, &r.rhs_ty),
557 pub fn eq_use_tree(l: &UseTree, r: &UseTree) -> bool {
558 eq_path(&l.prefix, &r.prefix) && eq_use_tree_kind(&l.kind, &r.kind)
561 pub fn eq_anon_const(l: &AnonConst, r: &AnonConst) -> bool {
562 eq_expr(&l.value, &r.value)
565 pub fn eq_use_tree_kind(l: &UseTreeKind, r: &UseTreeKind) -> bool {
568 (Glob, Glob) => true,
569 (Simple(l, _, _), Simple(r, _, _)) => both(l, r, |l, r| eq_id(*l, *r)),
570 (Nested(l), Nested(r)) => over(l, r, |(l, _), (r, _)| eq_use_tree(l, r)),
575 pub fn eq_defaultness(l: Defaultness, r: Defaultness) -> bool {
578 (Defaultness::Final, Defaultness::Final) | (Defaultness::Default(_), Defaultness::Default(_))
582 pub fn eq_vis(l: &Visibility, r: &Visibility) -> bool {
583 use VisibilityKind::*;
584 match (&l.kind, &r.kind) {
585 (Public, Public) | (Inherited, Inherited) => true,
586 (Restricted { path: l, .. }, Restricted { path: r, .. }) => eq_path(l, r),
591 pub fn eq_fn_decl(l: &FnDecl, r: &FnDecl) -> bool {
592 eq_fn_ret_ty(&l.output, &r.output)
593 && over(&l.inputs, &r.inputs, |l, r| {
594 l.is_placeholder == r.is_placeholder
595 && eq_pat(&l.pat, &r.pat)
596 && eq_ty(&l.ty, &r.ty)
597 && over(&l.attrs, &r.attrs, eq_attr)
601 pub fn eq_closure_binder(l: &ClosureBinder, r: &ClosureBinder) -> bool {
603 (ClosureBinder::NotPresent, ClosureBinder::NotPresent) => true,
604 (ClosureBinder::For { generic_params: lp, .. }, ClosureBinder::For { generic_params: rp, .. }) => {
605 lp.len() == rp.len() && std::iter::zip(lp.iter(), rp.iter()).all(|(l, r)| eq_generic_param(l, r))
611 pub fn eq_fn_ret_ty(l: &FnRetTy, r: &FnRetTy) -> bool {
613 (FnRetTy::Default(_), FnRetTy::Default(_)) => true,
614 (FnRetTy::Ty(l), FnRetTy::Ty(r)) => eq_ty(l, r),
619 pub fn eq_ty(l: &Ty, r: &Ty) -> bool {
621 match (&l.kind, &r.kind) {
622 (Paren(l), _) => eq_ty(l, r),
623 (_, Paren(r)) => eq_ty(l, r),
624 (Never, Never) | (Infer, Infer) | (ImplicitSelf, ImplicitSelf) | (Err, Err) | (CVarArgs, CVarArgs) => true,
625 (Slice(l), Slice(r)) => eq_ty(l, r),
626 (Array(le, ls), Array(re, rs)) => eq_ty(le, re) && eq_expr(&ls.value, &rs.value),
627 (Ptr(l), Ptr(r)) => l.mutbl == r.mutbl && eq_ty(&l.ty, &r.ty),
628 (Rptr(ll, l), Rptr(rl, r)) => {
629 both(ll, rl, |l, r| eq_id(l.ident, r.ident)) && l.mutbl == r.mutbl && eq_ty(&l.ty, &r.ty)
631 (BareFn(l), BareFn(r)) => {
632 l.unsafety == r.unsafety
633 && eq_ext(&l.ext, &r.ext)
634 && over(&l.generic_params, &r.generic_params, eq_generic_param)
635 && eq_fn_decl(&l.decl, &r.decl)
637 (Tup(l), Tup(r)) => over(l, r, |l, r| eq_ty(l, r)),
638 (Path(lq, lp), Path(rq, rp)) => both(lq, rq, eq_qself) && eq_path(lp, rp),
639 (TraitObject(lg, ls), TraitObject(rg, rs)) => ls == rs && over(lg, rg, eq_generic_bound),
640 (ImplTrait(_, lg), ImplTrait(_, rg)) => over(lg, rg, eq_generic_bound),
641 (Typeof(l), Typeof(r)) => eq_expr(&l.value, &r.value),
642 (MacCall(l), MacCall(r)) => eq_mac_call(l, r),
647 pub fn eq_ext(l: &Extern, r: &Extern) -> bool {
650 (None, None) | (Implicit(_), Implicit(_)) => true,
651 (Explicit(l, _), Explicit(r, _)) => eq_str_lit(l, r),
656 pub fn eq_str_lit(l: &StrLit, r: &StrLit) -> bool {
657 l.style == r.style && l.symbol == r.symbol && l.suffix == r.suffix
660 pub fn eq_poly_ref_trait(l: &PolyTraitRef, r: &PolyTraitRef) -> bool {
661 eq_path(&l.trait_ref.path, &r.trait_ref.path)
662 && over(&l.bound_generic_params, &r.bound_generic_params, |l, r| {
663 eq_generic_param(l, r)
667 pub fn eq_generic_param(l: &GenericParam, r: &GenericParam) -> bool {
668 use GenericParamKind::*;
669 l.is_placeholder == r.is_placeholder
670 && eq_id(l.ident, r.ident)
671 && over(&l.bounds, &r.bounds, eq_generic_bound)
672 && match (&l.kind, &r.kind) {
673 (Lifetime, Lifetime) => true,
674 (Type { default: l }, Type { default: r }) => both(l, r, |l, r| eq_ty(l, r)),
686 ) => eq_ty(lt, rt) && both(ld, rd, eq_anon_const),
689 && over(&l.attrs, &r.attrs, eq_attr)
692 pub fn eq_generic_bound(l: &GenericBound, r: &GenericBound) -> bool {
695 (Trait(ptr1, tbm1), Trait(ptr2, tbm2)) => tbm1 == tbm2 && eq_poly_ref_trait(ptr1, ptr2),
696 (Outlives(l), Outlives(r)) => eq_id(l.ident, r.ident),
701 fn eq_term(l: &Term, r: &Term) -> bool {
703 (Term::Ty(l), Term::Ty(r)) => eq_ty(l, r),
704 (Term::Const(l), Term::Const(r)) => eq_anon_const(l, r),
709 pub fn eq_assoc_constraint(l: &AssocConstraint, r: &AssocConstraint) -> bool {
710 use AssocConstraintKind::*;
711 eq_id(l.ident, r.ident)
712 && match (&l.kind, &r.kind) {
713 (Equality { term: l }, Equality { term: r }) => eq_term(l, r),
714 (Bound { bounds: l }, Bound { bounds: r }) => over(l, r, eq_generic_bound),
719 pub fn eq_mac_call(l: &MacCall, r: &MacCall) -> bool {
720 eq_path(&l.path, &r.path) && eq_mac_args(&l.args, &r.args)
723 pub fn eq_attr(l: &Attribute, r: &Attribute) -> bool {
726 && match (&l.kind, &r.kind) {
727 (DocComment(l1, l2), DocComment(r1, r2)) => l1 == r1 && l2 == r2,
728 (Normal(l), Normal(r)) => eq_path(&l.item.path, &r.item.path) && eq_mac_args(&l.item.args, &r.item.args),
733 pub fn eq_mac_args(l: &MacArgs, r: &MacArgs) -> bool {
736 (Empty, Empty) => true,
737 (Delimited(_, ld, lts), Delimited(_, rd, rts)) => ld == rd && lts.eq_unspanned(rts),
738 (Eq(_, MacArgsEq::Ast(le)), Eq(_, MacArgsEq::Ast(re))) => eq_expr(le, re),
739 (Eq(_, MacArgsEq::Hir(ll)), Eq(_, MacArgsEq::Hir(rl))) => ll.kind == rl.kind,