Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/hir-ty/src/infer.rs')
| -rw-r--r-- | crates/hir-ty/src/infer.rs | 79 |
1 files changed, 43 insertions, 36 deletions
diff --git a/crates/hir-ty/src/infer.rs b/crates/hir-ty/src/infer.rs index 617ebba881..0cb7002f44 100644 --- a/crates/hir-ty/src/infer.rs +++ b/crates/hir-ty/src/infer.rs @@ -16,7 +16,7 @@ pub(crate) mod cast; pub(crate) mod closure; mod coerce; -mod diagnostics; +pub(crate) mod diagnostics; mod expr; mod mutability; mod pat; @@ -236,7 +236,7 @@ pub enum InferenceDiagnostic { name: Name, /// Contains the type the field resolves to field_with_same_name: Option<Ty>, - assoc_func_with_same_name: Option<AssocItemId>, + assoc_func_with_same_name: Option<FunctionId>, }, UnresolvedAssocItem { id: ExprOrPatId, @@ -1239,7 +1239,29 @@ impl<'a> InferenceContext<'a> { } fn write_expr_adj(&mut self, expr: ExprId, adjustments: Vec<Adjustment>) { - self.result.expr_adjustments.insert(expr, adjustments); + if adjustments.is_empty() { + return; + } + match self.result.expr_adjustments.entry(expr) { + std::collections::hash_map::Entry::Occupied(mut entry) => { + match (&mut entry.get_mut()[..], &adjustments[..]) { + ( + [Adjustment { kind: Adjust::NeverToAny, target }], + [.., Adjustment { target: new_target, .. }], + ) => { + // NeverToAny coercion can target any type, so instead of adding a new + // adjustment on top we can change the target. + *target = new_target.clone(); + } + _ => { + *entry.get_mut() = adjustments; + } + } + } + std::collections::hash_map::Entry::Vacant(entry) => { + entry.insert(adjustments); + } + } } fn write_method_resolution(&mut self, expr: ExprId, func: FunctionId, subst: Substitution) { @@ -1480,21 +1502,22 @@ impl<'a> InferenceContext<'a> { &self.diagnostics, InferenceTyDiagnosticSource::Body, ); + let mut path_ctx = ctx.at_path(path, node); let (resolution, unresolved) = if value_ns { - let Some(res) = ctx.resolve_path_in_value_ns(path, node, HygieneId::ROOT) else { + let Some(res) = path_ctx.resolve_path_in_value_ns(HygieneId::ROOT) else { return (self.err_ty(), None); }; match res { ResolveValueResult::ValueNs(value, _) => match value { ValueNs::EnumVariantId(var) => { - let substs = ctx.substs_from_path(path, var.into(), true); + let substs = path_ctx.substs_from_path(var.into(), true); drop(ctx); let ty = self.db.ty(var.lookup(self.db.upcast()).parent.into()); let ty = self.insert_type_vars(ty.substitute(Interner, &substs)); return (ty, Some(var.into())); } ValueNs::StructId(strukt) => { - let substs = ctx.substs_from_path(path, strukt.into(), true); + let substs = path_ctx.substs_from_path(strukt.into(), true); drop(ctx); let ty = self.db.ty(strukt.into()); let ty = self.insert_type_vars(ty.substitute(Interner, &substs)); @@ -1509,7 +1532,7 @@ impl<'a> InferenceContext<'a> { ResolveValueResult::Partial(typens, unresolved, _) => (typens, Some(unresolved)), } } else { - match ctx.resolve_path_in_type_ns(path, node) { + match path_ctx.resolve_path_in_type_ns() { Some((it, idx)) => (it, idx), None => return (self.err_ty(), None), } @@ -1520,21 +1543,21 @@ impl<'a> InferenceContext<'a> { }; return match resolution { TypeNs::AdtId(AdtId::StructId(strukt)) => { - let substs = ctx.substs_from_path(path, strukt.into(), true); + let substs = path_ctx.substs_from_path(strukt.into(), true); drop(ctx); let ty = self.db.ty(strukt.into()); let ty = self.insert_type_vars(ty.substitute(Interner, &substs)); forbid_unresolved_segments((ty, Some(strukt.into())), unresolved) } TypeNs::AdtId(AdtId::UnionId(u)) => { - let substs = ctx.substs_from_path(path, u.into(), true); + let substs = path_ctx.substs_from_path(u.into(), true); drop(ctx); let ty = self.db.ty(u.into()); let ty = self.insert_type_vars(ty.substitute(Interner, &substs)); forbid_unresolved_segments((ty, Some(u.into())), unresolved) } TypeNs::EnumVariantId(var) => { - let substs = ctx.substs_from_path(path, var.into(), true); + let substs = path_ctx.substs_from_path(var.into(), true); drop(ctx); let ty = self.db.ty(var.lookup(self.db.upcast()).parent.into()); let ty = self.insert_type_vars(ty.substitute(Interner, &substs)); @@ -1545,31 +1568,32 @@ impl<'a> InferenceContext<'a> { let substs = generics.placeholder_subst(self.db); let mut ty = self.db.impl_self_ty(impl_id).substitute(Interner, &substs); - let Some(mut remaining_idx) = unresolved else { + let Some(remaining_idx) = unresolved else { drop(ctx); return self.resolve_variant_on_alias(ty, None, mod_path); }; let mut remaining_segments = path.segments().skip(remaining_idx); + if remaining_segments.len() >= 2 { + path_ctx.ignore_last_segment(); + } + // We need to try resolving unresolved segments one by one because each may resolve // to a projection, which `TyLoweringContext` cannot handle on its own. let mut tried_resolving_once = false; - while !remaining_segments.is_empty() { - let resolved_segment = path.segments().get(remaining_idx - 1).unwrap(); - let current_segment = remaining_segments.take(1); - + while let Some(current_segment) = remaining_segments.first() { // If we can resolve to an enum variant, it takes priority over associated type // of the same name. if let Some((AdtId::EnumId(id), _)) = ty.as_adt() { let enum_data = self.db.enum_data(id); - let name = current_segment.first().unwrap().name; - if let Some(variant) = enum_data.variant(name) { + if let Some(variant) = enum_data.variant(current_segment.name) { return if remaining_segments.len() == 1 { (ty, Some(variant.into())) } else { // We still have unresolved paths, but enum variants never have // associated types! + // FIXME: Report an error. (self.err_ty(), None) }; } @@ -1578,23 +1602,13 @@ impl<'a> InferenceContext<'a> { if tried_resolving_once { // FIXME: with `inherent_associated_types` this is allowed, but our `lower_partly_resolved_path()` // will need to be updated to err at the correct segment. - // - // We need to stop here because otherwise the segment index passed to `lower_partly_resolved_path()` - // will be incorrect, and that can mess up error reporting. break; } // `lower_partly_resolved_path()` returns `None` as type namespace unless // `remaining_segments` is empty, which is never the case here. We don't know // which namespace the new `ty` is in until normalized anyway. - (ty, _) = ctx.lower_partly_resolved_path( - node, - resolution, - resolved_segment, - current_segment, - (remaining_idx - 1) as u32, - false, - ); + (ty, _) = path_ctx.lower_partly_resolved_path(resolution, false); tried_resolving_once = true; ty = self.table.insert_type_vars(ty); @@ -1604,8 +1618,6 @@ impl<'a> InferenceContext<'a> { return (self.err_ty(), None); } - // FIXME(inherent_associated_types): update `resolution` based on `ty` here. - remaining_idx += 1; remaining_segments = remaining_segments.skip(1); } drop(ctx); @@ -1621,12 +1633,7 @@ impl<'a> InferenceContext<'a> { (ty, variant) } TypeNs::TypeAliasId(it) => { - let resolved_seg = match unresolved { - None => path.segments().last().unwrap(), - Some(n) => path.segments().get(path.segments().len() - n - 1).unwrap(), - }; - let substs = - ctx.substs_from_path_segment(resolved_seg, Some(it.into()), true, None); + let substs = path_ctx.substs_from_path_segment(it.into(), true, None); drop(ctx); let ty = self.db.ty(it.into()); let ty = self.insert_type_vars(ty.substitute(Interner, &substs)); |