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Rollup merge of #107486 - compiler-errors:bound-ty-keep-name, r=oli-obk

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Track bound types like bound regions

When we instantiate bound types into placeholder types, we throw away the names for some reason. These names are particularly useful for error reporting once we have `for<T>` binders.

r? types
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Guillaume Gomez 2023-01-31 23:38:52 +01:00 • committed by GitHub
commit d36bdf2d30
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13 changed files with 52 additions and 38 deletions
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2
compiler/rustc_hir_analysis/src/check/compare_impl_item.rs
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@ -1930,7 +1930,7 @@ pub(super) fn check_type_bounds<'tcx>(
smallvec::SmallVec::with_capacity(defs.count());
InternalSubsts::fill_single(&mut substs, defs, &mut |param, _| match param.kind {
GenericParamDefKind::Type { .. } => {
let kind = ty::BoundTyKind::Param(param.name);
let kind = ty::BoundTyKind::Param(param.def_id, param.name);
let bound_var = ty::BoundVariableKind::Ty(kind);
bound_vars.push(bound_var);
tcx.mk_ty(ty::Bound(