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Remove astconv::ConvertedBinding
1 parent f62a695 commit 38a2a65

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3 files changed

+96
-151
lines changed

3 files changed

+96
-151
lines changed

‎compiler/rustc_hir_analysis/src/astconv/bounds.rs

+65-67
Original file line numberDiff line numberDiff line change
@@ -9,9 +9,7 @@ use rustc_span::{ErrorGuaranteed, Span};
99
use rustc_trait_selection::traits;
1010
use smallvec::SmallVec;
1111

12-
use crate::astconv::{
13-
AstConv, ConvertedBinding, ConvertedBindingKind, OnlySelfBounds, PredicateFilter,
14-
};
12+
use crate::astconv::{AstConv, OnlySelfBounds, PredicateFilter};
1513
use crate::bounds::Bounds;
1614
use crate::errors;
1715

@@ -238,7 +236,7 @@ impl<'tcx> dyn AstConv<'tcx> + '_ {
238236
&self,
239237
hir_ref_id: hir::HirId,
240238
trait_ref: ty::PolyTraitRef<'tcx>,
241-
binding: &ConvertedBinding<'_, 'tcx>,
239+
binding: &hir::TypeBinding<'tcx>,
242240
bounds: &mut Bounds<'tcx>,
243241
speculative: bool,
244242
dup_bindings: &mut FxIndexMap<DefId, Span>,
@@ -263,21 +261,20 @@ impl<'tcx> dyn AstConv<'tcx> + '_ {
263261

264262
let tcx = self.tcx();
265263

266-
let assoc_kind =
267-
if binding.gen_args.parenthesized == hir::GenericArgsParentheses::ReturnTypeNotation {
268-
ty::AssocKind::Fn
269-
} else if let ConvertedBindingKind::Equality(term) = binding.kind
270-
&& let ty::TermKind::Const(_) = term.node.unpack()
271-
{
272-
ty::AssocKind::Const
273-
} else {
274-
ty::AssocKind::Type
275-
};
264+
let assoc_kind = if binding.gen_args.parenthesized
265+
== hir::GenericArgsParentheses::ReturnTypeNotation
266+
{
267+
ty::AssocKind::Fn
268+
} else if let hir::TypeBindingKind::Equality { term: hir::Term::Const(_) } = binding.kind {
269+
ty::AssocKind::Const
270+
} else {
271+
ty::AssocKind::Type
272+
};
276273

277274
let candidate = if self.trait_defines_associated_item_named(
278275
trait_ref.def_id(),
279276
assoc_kind,
280-
binding.item_name,
277+
binding.ident,
281278
) {
282279
// Simple case: The assoc item is defined in the current trait.
283280
trait_ref
@@ -289,14 +286,14 @@ impl<'tcx> dyn AstConv<'tcx> + '_ {
289286
trait_ref.skip_binder().print_only_trait_name(),
290287
None,
291288
assoc_kind,
292-
binding.item_name,
289+
binding.ident,
293290
path_span,
294-
Some(&binding),
291+
Some(binding),
295292
)?
296293
};
297294

298295
let (assoc_ident, def_scope) =
299-
tcx.adjust_ident_and_get_scope(binding.item_name, candidate.def_id(), hir_ref_id);
296+
tcx.adjust_ident_and_get_scope(binding.ident, candidate.def_id(), hir_ref_id);
300297

301298
// We have already adjusted the item name above, so compare with `.normalize_to_macros_2_0()`
302299
// instead of calling `filter_by_name_and_kind` which would needlessly normalize the
@@ -312,7 +309,7 @@ impl<'tcx> dyn AstConv<'tcx> + '_ {
312309
.dcx()
313310
.struct_span_err(
314311
binding.span,
315-
format!("{} `{}` is private", assoc_item.kind, binding.item_name),
312+
format!("{} `{}` is private", assoc_item.kind, binding.ident),
316313
)
317314
.with_span_label(binding.span, format!("private {}", assoc_item.kind))
318315
.emit();
@@ -327,7 +324,7 @@ impl<'tcx> dyn AstConv<'tcx> + '_ {
327324
tcx.dcx().emit_err(errors::ValueOfAssociatedStructAlreadySpecified {
328325
span: binding.span,
329326
prev_span: *prev_span,
330-
item_name: binding.item_name,
327+
item_name: binding.ident,
331328
def_path: tcx.def_path_str(assoc_item.container_id(tcx)),
332329
});
333330
})
@@ -412,7 +409,7 @@ impl<'tcx> dyn AstConv<'tcx> + '_ {
412409
// parent arguments (the arguments of the trait) and the own arguments (the ones of
413410
// the associated item itself) and construct an alias type using them.
414411
candidate.map_bound(|trait_ref| {
415-
let ident = Ident::new(assoc_item.name, binding.item_name.span);
412+
let ident = Ident::new(assoc_item.name, binding.ident.span);
416413
let item_segment = hir::PathSegment {
417414
ident,
418415
hir_id: binding.hir_id,
@@ -436,66 +433,67 @@ impl<'tcx> dyn AstConv<'tcx> + '_ {
436433
})
437434
};
438435

439-
if !speculative {
440-
// Find any late-bound regions declared in `ty` that are not
441-
// declared in the trait-ref or assoc_item. These are not well-formed.
442-
//
443-
// Example:
444-
//
445-
// for<'a> <T as Iterator>::Item = &'a str // <-- 'a is bad
446-
// for<'a> <T as FnMut<(&'a u32,)>>::Output = &'a str // <-- 'a is ok
447-
if let ConvertedBindingKind::Equality(term) = binding.kind {
448-
let late_bound_in_projection_ty =
449-
tcx.collect_constrained_late_bound_regions(&projection_ty);
450-
let late_bound_in_term =
451-
tcx.collect_referenced_late_bound_regions(&trait_ref.rebind(term.node));
452-
debug!(?late_bound_in_projection_ty);
453-
debug!(?late_bound_in_term);
454-
455-
// NOTE(associated_const_equality): This error should be impossible to trigger
456-
// with associated const equality bounds.
457-
// FIXME: point at the type params that don't have appropriate lifetimes:
458-
// struct S1<F: for<'a> Fn(&i32, &i32) -> &'a i32>(F);
459-
// ---- ---- ^^^^^^^
460-
self.validate_late_bound_regions(
461-
late_bound_in_projection_ty,
462-
late_bound_in_term,
463-
|br_name| {
464-
struct_span_code_err!(
465-
tcx.dcx(),
466-
binding.span,
467-
E0582,
468-
"binding for associated type `{}` references {}, \
469-
which does not appear in the trait input types",
470-
binding.item_name,
471-
br_name
472-
)
473-
},
474-
);
475-
}
476-
}
477-
478436
match binding.kind {
479-
ConvertedBindingKind::Equality(..) if let ty::AssocKind::Fn = assoc_kind => {
437+
hir::TypeBindingKind::Equality { .. } if let ty::AssocKind::Fn = assoc_kind => {
480438
return Err(tcx.dcx().emit_err(crate::errors::ReturnTypeNotationEqualityBound {
481439
span: binding.span,
482440
}));
483441
}
484-
ConvertedBindingKind::Equality(term) => {
442+
hir::TypeBindingKind::Equality { term } => {
443+
let term = match term {
444+
hir::Term::Ty(ty) => self.ast_ty_to_ty(ty).into(),
445+
hir::Term::Const(ct) => ty::Const::from_anon_const(tcx, ct.def_id).into(),
446+
};
447+
448+
if !speculative {
449+
// Find any late-bound regions declared in `ty` that are not
450+
// declared in the trait-ref or assoc_item. These are not well-formed.
451+
//
452+
// Example:
453+
//
454+
// for<'a> <T as Iterator>::Item = &'a str // <-- 'a is bad
455+
// for<'a> <T as FnMut<(&'a u32,)>>::Output = &'a str // <-- 'a is ok
456+
let late_bound_in_projection_ty =
457+
tcx.collect_constrained_late_bound_regions(&projection_ty);
458+
let late_bound_in_term =
459+
tcx.collect_referenced_late_bound_regions(&trait_ref.rebind(term));
460+
debug!(?late_bound_in_projection_ty);
461+
debug!(?late_bound_in_term);
462+
463+
// FIXME: point at the type params that don't have appropriate lifetimes:
464+
// struct S1<F: for<'a> Fn(&i32, &i32) -> &'a i32>(F);
465+
// ---- ---- ^^^^^^^
466+
// NOTE(associated_const_equality): This error should be impossible to trigger
467+
// with associated const equality bounds.
468+
self.validate_late_bound_regions(
469+
late_bound_in_projection_ty,
470+
late_bound_in_term,
471+
|br_name| {
472+
struct_span_code_err!(
473+
tcx.dcx(),
474+
binding.span,
475+
E0582,
476+
"binding for associated type `{}` references {}, \
477+
which does not appear in the trait input types",
478+
binding.ident,
479+
br_name
480+
)
481+
},
482+
);
483+
}
484+
485485
// "Desugar" a constraint like `T: Iterator<Item = u32>` this to
486486
// the "projection predicate" for:
487487
//
488488
// `<T as Iterator>::Item = u32`
489489
bounds.push_projection_bound(
490490
tcx,
491-
projection_ty.map_bound(|projection_ty| ty::ProjectionPredicate {
492-
projection_ty,
493-
term: term.node,
494-
}),
491+
projection_ty
492+
.map_bound(|projection_ty| ty::ProjectionPredicate { projection_ty, term }),
495493
binding.span,
496494
);
497495
}
498-
ConvertedBindingKind::Constraint(ast_bounds) => {
496+
hir::TypeBindingKind::Constraint { bounds: ast_bounds } => {
499497
// "Desugar" a constraint like `T: Iterator<Item: Debug>` to
500498
//
501499
// `<T as Iterator>::Item: Debug`

‎compiler/rustc_hir_analysis/src/astconv/errors.rs

+14-10
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
use crate::astconv::{AstConv, ConvertedBindingKind};
1+
use crate::astconv::AstConv;
22
use crate::errors::{
33
self, AssocTypeBindingNotAllowed, ManualImplementation, MissingTypeParams,
44
ParenthesizedFnTraitExpansion,
@@ -111,7 +111,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
111111
assoc_kind: ty::AssocKind,
112112
assoc_name: Ident,
113113
span: Span,
114-
binding: Option<&super::ConvertedBinding<'_, 'tcx>>,
114+
binding: Option<&hir::TypeBinding<'tcx>>,
115115
) -> ErrorGuaranteed
116116
where
117117
I: Iterator<Item = ty::PolyTraitRef<'tcx>>,
@@ -290,13 +290,13 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
290290
assoc_kind: ty::AssocKind,
291291
ident: Ident,
292292
span: Span,
293-
binding: Option<&super::ConvertedBinding<'_, 'tcx>>,
293+
binding: Option<&hir::TypeBinding<'tcx>>,
294294
) -> ErrorGuaranteed {
295295
let tcx = self.tcx();
296296

297297
let bound_on_assoc_const_label = if let ty::AssocKind::Const = assoc_item.kind
298298
&& let Some(binding) = binding
299-
&& let ConvertedBindingKind::Constraint(_) = binding.kind
299+
&& let hir::TypeBindingKind::Constraint { .. } = binding.kind
300300
{
301301
let lo = if binding.gen_args.span_ext.is_dummy() {
302302
ident.span
@@ -310,14 +310,14 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
310310

311311
// FIXME(associated_const_equality): This has quite a few false positives and negatives.
312312
let wrap_in_braces_sugg = if let Some(binding) = binding
313-
&& let ConvertedBindingKind::Equality(term) = binding.kind
314-
&& let ty::TermKind::Ty(ty) = term.node.unpack()
313+
&& let hir::TypeBindingKind::Equality { term: hir::Term::Ty(hir_ty) } = binding.kind
314+
&& let ty = self.ast_ty_to_ty(hir_ty)
315315
&& (ty.is_enum() || ty.references_error())
316316
&& tcx.features().associated_const_equality
317317
{
318318
Some(errors::AssocKindMismatchWrapInBracesSugg {
319-
lo: term.span.shrink_to_lo(),
320-
hi: term.span.shrink_to_hi(),
319+
lo: hir_ty.span.shrink_to_lo(),
320+
hi: hir_ty.span.shrink_to_hi(),
321321
})
322322
} else {
323323
None
@@ -326,9 +326,13 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
326326
// For equality bounds, we want to blame the term (RHS) instead of the item (LHS) since
327327
// one can argue that that's more “intuitive” to the user.
328328
let (span, expected_because_label, expected, got) = if let Some(binding) = binding
329-
&& let ConvertedBindingKind::Equality(term) = binding.kind
329+
&& let hir::TypeBindingKind::Equality { term } = binding.kind
330330
{
331-
(term.span, Some(ident.span), assoc_item.kind, assoc_kind)
331+
let span = match term {
332+
hir::Term::Ty(ty) => ty.span,
333+
hir::Term::Const(ct) => tcx.def_span(ct.def_id),
334+
};
335+
(span, Some(ident.span), assoc_item.kind, assoc_kind)
332336
} else {
333337
(ident.span, None, assoc_kind, assoc_item.kind)
334338
};

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