Rollup merge of rust-lang#66457 - cjgillot:just_hashstable, r=Zoxc

Just derive Hashstable in librustc

Split out of rust-lang#66279

r? @Zoxc

Author: Centril

Cargo.lock

@@ -3719,6 +3719,7 @@ dependencies = [
  "rustc_errors",
  "rustc_index",
  "rustc_lexer",
+ "rustc_macros",
  "rustc_target",
  "serialize",
  "smallvec 1.0.0",

src/librustc/dep_graph/dep_node.rs

@@ -578,7 +578,7 @@ impl<'tcx> DepNodeParams<'tcx> for HirId {
 /// the need to be mapped or unmapped. (This ensures we can serialize
 /// them even in the absence of a tcx.)
 #[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash,
-         RustcEncodable, RustcDecodable)]
+         RustcEncodable, RustcDecodable, HashStable)]
 pub struct WorkProductId {
     hash: Fingerprint
 }
@@ -599,7 +599,3 @@ impl WorkProductId {
         }
     }
 }
-
-impl_stable_hash_for!(struct crate::dep_graph::WorkProductId {
-    hash
-});

src/librustc/hir/map/definitions.rs

@@ -313,11 +313,9 @@ pub enum DefPathData {
 }
 
 #[derive(Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord, Debug,
-         RustcEncodable, RustcDecodable)]
+         RustcEncodable, RustcDecodable, HashStable)]
 pub struct DefPathHash(pub Fingerprint);
 
-impl_stable_hash_for!(tuple_struct DefPathHash { fingerprint });
-
 impl Borrow<Fingerprint> for DefPathHash {
     #[inline]
     fn borrow(&self) -> &Fingerprint {

src/librustc/hir/mod.rs

@@ -1215,7 +1215,7 @@ impl UnOp {
 }
 
 /// A statement.
-#[derive(RustcEncodable, RustcDecodable)]
+#[derive(RustcEncodable, RustcDecodable, HashStable)]
 pub struct Stmt {
     pub hir_id: HirId,
     pub kind: StmtKind,

src/librustc/ich/impls_hir.rs

@@ -140,13 +140,6 @@ impl<'a> HashStable<StableHashingContext<'a>> for hir::Ty {
 
 impl_stable_hash_for_spanned!(hir::BinOpKind);
 
-impl_stable_hash_for!(struct hir::Stmt {
-    hir_id,
-    kind,
-    span,
-});
-
-
 impl_stable_hash_for_spanned!(ast::Name);
 
 impl<'a> HashStable<StableHashingContext<'a>> for hir::Expr {

src/librustc/infer/outlives/free_region_map.rs

@@ -1,7 +1,7 @@
 use crate::ty::{self, Lift, TyCtxt, Region};
 use rustc_data_structures::transitive_relation::TransitiveRelation;
 
-#[derive(Clone, RustcEncodable, RustcDecodable, Debug, Default)]
+#[derive(Clone, RustcEncodable, RustcDecodable, Debug, Default, HashStable)]
 pub struct FreeRegionMap<'tcx> {
     // Stores the relation `a < b`, where `a` and `b` are regions.
     //
@@ -89,10 +89,6 @@ fn is_free_or_static(r: Region<'_>) -> bool {
     }
 }
 
-impl_stable_hash_for!(struct FreeRegionMap<'tcx> {
-    relation
-});
-
 impl<'a, 'tcx> Lift<'tcx> for FreeRegionMap<'a> {
     type Lifted = FreeRegionMap<'tcx>;
     fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<FreeRegionMap<'tcx>> {

src/librustc/lint/mod.rs

@@ -543,18 +543,11 @@ impl LintId {
 }
 
 /// Setting for how to handle a lint.
-#[derive(Clone, Copy, PartialEq, PartialOrd, Eq, Ord, Debug, Hash)]
+#[derive(Clone, Copy, PartialEq, PartialOrd, Eq, Ord, Debug, Hash, HashStable)]
 pub enum Level {
     Allow, Warn, Deny, Forbid,
 }
 
-impl_stable_hash_for!(enum self::Level {
-    Allow,
-    Warn,
-    Deny,
-    Forbid
-});
-
 impl Level {
     /// Converts a level to a lower-case string.
     pub fn as_str(self) -> &'static str {
@@ -590,7 +583,7 @@ impl Level {
 }
 
 /// How a lint level was set.
-#[derive(Clone, Copy, PartialEq, Eq)]
+#[derive(Clone, Copy, PartialEq, Eq, HashStable)]
 pub enum LintSource {
     /// Lint is at the default level as declared
     /// in rustc or a plugin.
@@ -603,12 +596,6 @@ pub enum LintSource {
     CommandLine(Symbol),
 }
 
-impl_stable_hash_for!(enum self::LintSource {
-    Default,
-    Node(name, span, reason),
-    CommandLine(text)
-});
-
 pub type LevelSource = (Level, LintSource);
 
 pub mod builtin;

src/librustc/middle/exported_symbols.rs

@@ -11,17 +11,12 @@ use crate::ty::subst::SubstsRef;
 /// kind of crate, including cdylibs which export very few things.
 /// `Rust` will only be exported if the crate produced is a Rust
 /// dylib.
-#[derive(Eq, PartialEq, Debug, Copy, Clone, RustcEncodable, RustcDecodable)]
+#[derive(Eq, PartialEq, Debug, Copy, Clone, RustcEncodable, RustcDecodable, HashStable)]
 pub enum SymbolExportLevel {
     C,
     Rust,
 }
 
-impl_stable_hash_for!(enum self::SymbolExportLevel {
-    C,
-    Rust
-});
-
 impl SymbolExportLevel {
     pub fn is_below_threshold(self, threshold: SymbolExportLevel) -> bool {
         threshold == SymbolExportLevel::Rust // export everything from Rust dylibs

src/librustc/middle/resolve_lifetime.rs

@@ -207,20 +207,14 @@ struct NamedRegionMap {
 }
 
 /// See [`NamedRegionMap`].
-#[derive(Default)]
+#[derive(Default, HashStable)]
 pub struct ResolveLifetimes {
     defs: FxHashMap<LocalDefId, FxHashMap<ItemLocalId, Region>>,
     late_bound: FxHashMap<LocalDefId, FxHashSet<ItemLocalId>>,
     object_lifetime_defaults:
         FxHashMap<LocalDefId, FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>>,
 }
 
-impl_stable_hash_for!(struct crate::middle::resolve_lifetime::ResolveLifetimes {
-    defs,
-    late_bound,
-    object_lifetime_defaults
-});
-
 struct LifetimeContext<'a, 'tcx> {
     tcx: TyCtxt<'tcx>,
     map: &'a mut NamedRegionMap,

src/librustc/middle/stability.rs

@@ -52,7 +52,7 @@ enum AnnotationKind {
 }
 
 /// An entry in the `depr_map`.
-#[derive(Clone)]
+#[derive(Clone, HashStable)]
 pub struct DeprecationEntry {
     /// The metadata of the attribute associated with this entry.
     pub attr: Deprecation,
@@ -61,11 +61,6 @@ pub struct DeprecationEntry {
     origin: Option<HirId>,
 }
 
-impl_stable_hash_for!(struct self::DeprecationEntry {
-    attr,
-    origin
-});
-
 impl DeprecationEntry {
     fn local(attr: Deprecation, id: HirId) -> DeprecationEntry {
         DeprecationEntry {
@@ -90,6 +85,7 @@ impl DeprecationEntry {
 }
 
 /// A stability index, giving the stability level for items and methods.
+#[derive(HashStable)]
 pub struct Index<'tcx> {
     /// This is mostly a cache, except the stabilities of local items
     /// are filled by the annotator.
@@ -103,13 +99,6 @@ pub struct Index<'tcx> {
     active_features: FxHashSet<Symbol>,
 }
 
-impl_stable_hash_for!(struct self::Index<'tcx> {
-    stab_map,
-    depr_map,
-    staged_api,
-    active_features
-});
-
 // A private tree-walker for producing an Index.
 struct Annotator<'a, 'tcx> {
     tcx: TyCtxt<'tcx>,