Module caches 

Re-exports

use std::sync::OnceLock; 🔒

use rustc_data_structures::sharded::ShardedHashMap; 🔒

use rustc_hir::def_id::LOCAL_CRATE; 🔒

use rustc_index::Idx; 🔒

use rustc_span::def_id::DefId; 🔒

use rustc_span::def_id::DefIndex; 🔒

use crate::dep_graph::DepNodeIndex; 🔒

use crate::query::keys::QueryKey; 🔒

Structs

DefIdCache

In-memory cache for queries whose key is a DefId.

DefaultCache

In-memory cache for queries whose keys aren’t suitable for any of the more specialized kinds of cache. Backed by a sharded hashmap.

SingleCache

In-memory cache for queries whose key type only has one value (e.g. ()). The cache therefore only needs to store one query return value.

VecCache

In-memory cache for queries whose keys are densely-numbered IDs (e.g CrateNum, LocalDefId), and can therefore be used as indices into a dense vector of cached values.

Traits

QueryCache

Trait for types that serve as an in-memory cache for query results, for a given key (argument) type and value (return) type.