Move HashResult.

It's the only thing left in `rustc_query_system::query::dispatcher`.

Author: nnethercote

compiler/rustc_middle/src/query/plumbing.rs

@@ -1,12 +1,14 @@
 use std::ops::Deref;
 
+use rustc_data_structures::fingerprint::Fingerprint;
 use rustc_data_structures::sync::{AtomicU64, WorkerLocal};
 use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_hir::hir_id::OwnerId;
 use rustc_macros::HashStable;
 use rustc_query_system::dep_graph::{DepNodeIndex, SerializedDepNodeIndex};
+use rustc_query_system::ich::StableHashingContext;
 pub(crate) use rustc_query_system::query::QueryJobId;
-use rustc_query_system::query::{CycleError, CycleErrorHandling, HashResult, QueryCache};
+use rustc_query_system::query::{CycleError, CycleErrorHandling, QueryCache};
 use rustc_span::{ErrorGuaranteed, Span};
 pub use sealed::IntoQueryParam;
 
@@ -30,6 +32,8 @@ pub type TryLoadFromDiskFn<'tcx, Key, Value> = fn(
 pub type IsLoadableFromDiskFn<'tcx, Key> =
     fn(tcx: TyCtxt<'tcx>, key: &Key, index: SerializedDepNodeIndex) -> bool;
 
+pub type HashResult<V> = Option<fn(&mut StableHashingContext<'_>, &V) -> Fingerprint>;
+
 /// Stores function pointers and other metadata for a particular query.
 ///
 /// Used indirectly by query plumbing in `rustc_query_system` via a trait,

compiler/rustc_query_impl/src/lib.rs

@@ -18,12 +18,12 @@ use rustc_middle::queries::{
 };
 use rustc_middle::query::AsLocalKey;
 use rustc_middle::query::on_disk_cache::{CacheEncoder, EncodedDepNodeIndex, OnDiskCache};
-use rustc_middle::query::plumbing::{QuerySystem, QuerySystemFns, QueryVTable};
+use rustc_middle::query::plumbing::{HashResult, QuerySystem, QuerySystemFns, QueryVTable};
 use rustc_middle::query::values::Value;
 use rustc_middle::ty::TyCtxt;
 use rustc_query_system::dep_graph::SerializedDepNodeIndex;
 use rustc_query_system::query::{
-    CycleError, CycleErrorHandling, HashResult, QueryCache, QueryMap, QueryMode, QueryState,
+    CycleError, CycleErrorHandling, QueryCache, QueryMap, QueryMode, QueryState,
 };
 use rustc_span::{ErrorGuaranteed, Span};
 

compiler/rustc_query_system/src/query/dispatcher.rs

@@ -15,7 +15,6 @@ use rustc_span::def_id::DefId;
 pub use self::caches::{
     DefIdCache, DefaultCache, QueryCache, QueryCacheKey, SingleCache, VecCache,
 };
-pub use self::dispatcher::HashResult;
 pub use self::job::{
     QueryInfo, QueryJob, QueryJobId, QueryJobInfo, QueryLatch, QueryMap, break_query_cycles,
     print_query_stack, report_cycle,
@@ -24,7 +23,6 @@ pub use self::plumbing::*;
 use crate::dep_graph::{DepKind, DepNodeIndex, HasDepContext, SerializedDepNodeIndex};
 
 mod caches;
-mod dispatcher;
 mod job;
 mod plumbing;