Struct OpaqueTypeTable

pub struct OpaqueTypeTable<'a, 'tcx> {
    storage: &'a mut OpaqueTypeStorage<'tcx>,
    undo_log: &'a mut InferCtxtUndoLogs<'tcx>,
}

Fields

storage: &'a mut OpaqueTypeStorage<'tcx>

undo_log: &'a mut InferCtxtUndoLogs<'tcx>

Implementations

impl<'a, 'tcx> OpaqueTypeTable<'a, 'tcx>

pub fn register( &mut self, key: OpaqueTypeKey<TyCtxt<'tcx>>, hidden_type: OpaqueHiddenType<'tcx>, ) -> Option<Ty<'tcx>>

pub fn add_duplicate( &mut self, key: OpaqueTypeKey<TyCtxt<'tcx>>, hidden_type: OpaqueHiddenType<'tcx>, )

Methods from Deref<Target = OpaqueTypeStorage<'tcx>>

pub fn num_entries(&self) -> OpaqueTypeStorageEntries

pub fn opaque_types_added_since( &self, prev_entries: OpaqueTypeStorageEntries, ) -> impl Iterator<Item = (OpaqueTypeKey<TyCtxt<'tcx>>, OpaqueHiddenType<'tcx>)>

pub fn iter_lookup_table( &self, ) -> impl Iterator<Item = (OpaqueTypeKey<TyCtxt<'tcx>>, OpaqueHiddenType<'tcx>)>

Only returns the opaque types from the lookup table. These are used when normalizing opaque types and have a unique key.

Outside of canonicalization one should generally use iter_opaque_types to also consider duplicate entries.

pub fn iter_duplicate_entries( &self, ) -> impl Iterator<Item = (OpaqueTypeKey<TyCtxt<'tcx>>, OpaqueHiddenType<'tcx>)>

Only returns the opaque types which are stored in duplicate_entries.

These have to considered when checking all opaque type uses but are e.g. irrelevant for canonical inputs as nested queries never meaningfully accesses them.

pub fn iter_opaque_types( &self, ) -> impl Iterator<Item = (OpaqueTypeKey<TyCtxt<'tcx>>, OpaqueHiddenType<'tcx>)>

Trait Implementations

impl<'tcx> Deref for OpaqueTypeTable<'_, 'tcx>

type Target = OpaqueTypeStorage<'tcx>

The resulting type after dereferencing.

fn deref(&self) -> &OpaqueTypeStorage<'tcx>

Dereferences the value.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes