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Eliminate DefiningAnchor::Error, it is indistinguishable from DefiningAnchor::Bind with an empty list

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This commit is contained in:
Oli Scherer
2024-03-07 09:08:20 +00:00
parent 40d5609548
commit 7348dd1950
5 changed files with 11 additions and 18 deletions
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8
compiler/rustc_middle/src/traits/mod.rs
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@@ -1004,6 +1004,10 @@ pub enum CodegenObligationError {
pub enum DefiningAnchor<'tcx> {
/// Define opaques which are in-scope of the current item being analyzed.
/// Also, eagerly replace these opaque types in `replace_opaque_types_with_inference_vars`.
///
/// If the list is empty, do not allow any opaques to be defined. This is used to catch type mismatch
/// errors when handling opaque types, and also should be used when we would
/// otherwise reveal opaques (such as [`Reveal::All`] reveal mode).
Bind(&'tcx ty::List<LocalDefId>),
/// In contexts where we don't currently know what opaques are allowed to be
/// defined, such as (old solver) canonical queries, we will simply allow
@@ -1013,10 +1017,6 @@ pub enum DefiningAnchor<'tcx> {
/// We do not eagerly replace opaque types in `replace_opaque_types_with_inference_vars`,
/// which may affect what predicates pass and fail in the old trait solver.
Bubble,
/// Do not allow any opaques to be defined. This is used to catch type mismatch
/// errors when handling opaque types, and also should be used when we would
/// otherwise reveal opaques (such as [`Reveal::All`] reveal mode).
Error,
}
impl<'tcx> DefiningAnchor<'tcx> {