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Hide _use_mk_alias_ty_instead in <AliasTy as Debug>::fmt #106980

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Merged
merged 1 commit into from
Jan 18, 2023
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Hide _use_mk_alias_ty_instead in <AliasTy as Debug>::fmt #106980

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11 changes: 10 additions & 1 deletion compiler/rustc_middle/src/ty/structural_impls.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,7 @@ use crate::mir::{Field, ProjectionKind};
use crate::ty::fold::{FallibleTypeFolder, TypeFoldable, TypeSuperFoldable};
use crate::ty::print::{with_no_trimmed_paths, FmtPrinter, Printer};
use crate::ty::visit::{TypeSuperVisitable, TypeVisitable, TypeVisitor};
use crate::ty::{self, InferConst, Lift, Term, TermKind, Ty, TyCtxt};
use crate::ty::{self, AliasTy, InferConst, Lift, Term, TermKind, Ty, TyCtxt};
use rustc_data_structures::functor::IdFunctor;
use rustc_hir::def::Namespace;
use rustc_index::vec::{Idx, IndexVec};
Expand Down Expand Up @@ -180,6 +180,15 @@ impl<'tcx> fmt::Debug for ty::PredicateKind<'tcx> {
}
}

impl<'tcx> fmt::Debug for AliasTy<'tcx> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("AliasTy")
.field("substs", &self.substs)
.field("def_id", &self.def_id)
.finish()
}
}

///////////////////////////////////////////////////////////////////////////
// Atomic structs
//
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2 changes: 1 addition & 1 deletion compiler/rustc_middle/src/ty/sty.rs
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Expand Up @@ -1226,7 +1226,7 @@ impl<'tcx> FallibleTypeFolder<'tcx> for SkipBindersAt<'tcx> {
/// For a projection, this would be `<Ty as Trait<...>>::N`.
///
/// For an opaque type, there is no explicit syntax.
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug, TyEncodable, TyDecodable)]
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, TyEncodable, TyDecodable)]
#[derive(HashStable, TypeFoldable, TypeVisitable, Lift)]
pub struct AliasTy<'tcx> {
/// The parameters of the associated or opaque item.
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2 changes: 1 addition & 1 deletion tests/ui/chalkify/bugs/async.stderr
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Expand Up @@ -37,7 +37,7 @@ LL | async fn foo(x: u32) -> u32 {
= help: the trait `Future` is not implemented for `[async fn body@$DIR/async.rs:23:29: 25:2]`
= note: [async fn body@$DIR/async.rs:23:29: 25:2] must be a future or must implement `IntoFuture` to be awaited

error: internal compiler error: projection clauses should be implied from elsewhere. obligation: `Obligation(predicate=Binder(ProjectionPredicate(AliasTy { substs: [[async fn body@$DIR/async.rs:23:29: 25:2]], def_id: ...), _use_mk_alias_ty_instead: () }, Term::Ty(u32)), []), depth=0)`
error: internal compiler error: projection clauses should be implied from elsewhere. obligation: `Obligation(predicate=Binder(ProjectionPredicate(AliasTy { substs: [[async fn body@$DIR/async.rs:23:29: 25:2]], def_id: ...) }, Term::Ty(u32)), []), depth=0)`
--> $DIR/async.rs:23:25
|
LL | async fn foo(x: u32) -> u32 {
Expand Down