Move `rustc_middle::parameterized` to `rustc_metadata`.

It's only used there.

3 files changed, 170 insertions, 32 deletions

diff --git a/compiler/rustc_metadata/src/rmeta/def_path_hash_map.rs b/compiler/rustc_metadata/src/rmeta/def_path_hash_map.rs
index 19369425f81..f3917b55782 100644
--- a/compiler/rustc_metadata/src/rmeta/def_path_hash_map.rs
+++ b/compiler/rustc_metadata/src/rmeta/def_path_hash_map.rs
@@ -1,6 +1,5 @@
 use rustc_data_structures::owned_slice::OwnedSlice;
 use rustc_hir::def_path_hash_map::{Config as HashMapConfig, DefPathHashMap};
-use rustc_middle::parameterized_over_tcx;
 use rustc_serialize::{Decodable, Decoder, Encodable, Encoder};
 use rustc_span::def_id::{DefIndex, DefPathHash};
 
@@ -11,10 +10,6 @@ pub(crate) enum DefPathHashMapRef<'tcx> {
     BorrowedFromTcx(&'tcx DefPathHashMap),
 }
 
-parameterized_over_tcx! {
-    DefPathHashMapRef,
-}
-
 impl DefPathHashMapRef<'_> {
     #[inline]
     pub(crate) fn def_path_hash_to_def_index(&self, def_path_hash: &DefPathHash) -> DefIndex {
diff --git a/compiler/rustc_metadata/src/rmeta/mod.rs b/compiler/rustc_metadata/src/rmeta/mod.rs
index 915c9731688..9de5e12d5bb 100644
--- a/compiler/rustc_metadata/src/rmeta/mod.rs
+++ b/compiler/rustc_metadata/src/rmeta/mod.rs
@@ -6,6 +6,7 @@ use decoder::{DecodeContext, Metadata};
 use def_path_hash_map::DefPathHashMapRef;
 use encoder::EncodeContext;
 pub use encoder::{EncodedMetadata, encode_metadata, rendered_const};
+pub(crate) use parameterized::ParameterizedOverTcx;
 use rustc_abi::{FieldIdx, ReprOptions, VariantIdx};
 use rustc_attr_data_structures::StrippedCfgItem;
 use rustc_data_structures::fx::FxHashMap;
@@ -26,12 +27,10 @@ use rustc_middle::middle::debugger_visualizer::DebuggerVisualizerFile;
 use rustc_middle::middle::exported_symbols::{ExportedSymbol, SymbolExportInfo};
 use rustc_middle::middle::lib_features::FeatureStability;
 use rustc_middle::middle::resolve_bound_vars::ObjectLifetimeDefault;
+use rustc_middle::mir;
 use rustc_middle::ty::fast_reject::SimplifiedType;
-use rustc_middle::ty::{
-    self, DeducedParamAttrs, ParameterizedOverTcx, Ty, TyCtxt, UnusedGenericParams,
-};
+use rustc_middle::ty::{self, DeducedParamAttrs, Ty, TyCtxt, UnusedGenericParams};
 use rustc_middle::util::Providers;
-use rustc_middle::{mir, trivially_parameterized_over_tcx};
 use rustc_serialize::opaque::FileEncoder;
 use rustc_session::config::{SymbolManglingVersion, TargetModifier};
 use rustc_session::cstore::{CrateDepKind, ForeignModule, LinkagePreference, NativeLib};
@@ -47,6 +46,7 @@ use crate::creader::CrateMetadataRef;
 mod decoder;
 mod def_path_hash_map;
 mod encoder;
+mod parameterized;
 mod table;
 
 pub(crate) fn rustc_version(cfg_version: &'static str) -> String {
@@ -86,10 +86,6 @@ struct LazyValue<T> {
     _marker: PhantomData<fn() -> T>,
 }
 
-impl<T: ParameterizedOverTcx> ParameterizedOverTcx for LazyValue<T> {
-    type Value<'tcx> = LazyValue<T::Value<'tcx>>;
-}
-
 impl<T> LazyValue<T> {
     fn from_position(position: NonZero<usize>) -> LazyValue<T> {
         LazyValue { position, _marker: PhantomData }
@@ -112,10 +108,6 @@ struct LazyArray<T> {
     _marker: PhantomData<fn() -> T>,
 }
 
-impl<T: ParameterizedOverTcx> ParameterizedOverTcx for LazyArray<T> {
-    type Value<'tcx> = LazyArray<T::Value<'tcx>>;
-}
-
 impl<T> Default for LazyArray<T> {
     fn default() -> LazyArray<T> {
         LazyArray::from_position_and_num_elems(NonZero::new(1).unwrap(), 0)
@@ -143,10 +135,6 @@ struct LazyTable<I, T> {
     _marker: PhantomData<fn(I) -> T>,
 }
 
-impl<I: 'static, T: ParameterizedOverTcx> ParameterizedOverTcx for LazyTable<I, T> {
-    type Value<'tcx> = LazyTable<I, T::Value<'tcx>>;
-}
-
 impl<I, T> LazyTable<I, T> {
     fn from_position_and_encoded_size(
         position: NonZero<usize>,
@@ -594,14 +582,3 @@ pub fn provide(providers: &mut Providers) {
     encoder::provide(providers);
     decoder::provide(providers);
 }
-
-trivially_parameterized_over_tcx! {
-    VariantData,
-    RawDefId,
-    TraitImpls,
-    IncoherentImpls,
-    CrateHeader,
-    CrateRoot,
-    CrateDep,
-    AttrFlags,
-}
diff --git a/compiler/rustc_metadata/src/rmeta/parameterized.rs b/compiler/rustc_metadata/src/rmeta/parameterized.rs
new file mode 100644
index 00000000000..7cd399baa42
--- /dev/null
+++ b/compiler/rustc_metadata/src/rmeta/parameterized.rs
@@ -0,0 +1,166 @@
+use std::hash::Hash;
+
+use rustc_data_structures::unord::UnordMap;
+use rustc_hir::def_id::DefIndex;
+use rustc_index::{Idx, IndexVec};
+use rustc_middle::ty::{Binder, EarlyBinder};
+use rustc_span::Symbol;
+
+use crate::rmeta::{LazyArray, LazyTable, LazyValue};
+
+pub(crate) trait ParameterizedOverTcx: 'static {
+    type Value<'tcx>;
+}
+
+impl<T: ParameterizedOverTcx> ParameterizedOverTcx for Option<T> {
+    type Value<'tcx> = Option<T::Value<'tcx>>;
+}
+
+impl<A: ParameterizedOverTcx, B: ParameterizedOverTcx> ParameterizedOverTcx for (A, B) {
+    type Value<'tcx> = (A::Value<'tcx>, B::Value<'tcx>);
+}
+
+impl<T: ParameterizedOverTcx> ParameterizedOverTcx for Vec<T> {
+    type Value<'tcx> = Vec<T::Value<'tcx>>;
+}
+
+impl<I: Idx + 'static, T: ParameterizedOverTcx> ParameterizedOverTcx for IndexVec<I, T> {
+    type Value<'tcx> = IndexVec<I, T::Value<'tcx>>;
+}
+
+impl<I: Hash + Eq + 'static, T: ParameterizedOverTcx> ParameterizedOverTcx for UnordMap<I, T> {
+    type Value<'tcx> = UnordMap<I, T::Value<'tcx>>;
+}
+
+impl<T: ParameterizedOverTcx> ParameterizedOverTcx for Binder<'static, T> {
+    type Value<'tcx> = Binder<'tcx, T::Value<'tcx>>;
+}
+
+impl<T: ParameterizedOverTcx> ParameterizedOverTcx for EarlyBinder<'static, T> {
+    type Value<'tcx> = EarlyBinder<'tcx, T::Value<'tcx>>;
+}
+
+impl<T: ParameterizedOverTcx> ParameterizedOverTcx for LazyValue<T> {
+    type Value<'tcx> = LazyValue<T::Value<'tcx>>;
+}
+
+impl<T: ParameterizedOverTcx> ParameterizedOverTcx for LazyArray<T> {
+    type Value<'tcx> = LazyArray<T::Value<'tcx>>;
+}
+
+impl<I: 'static, T: ParameterizedOverTcx> ParameterizedOverTcx for LazyTable<I, T> {
+    type Value<'tcx> = LazyTable<I, T::Value<'tcx>>;
+}
+
+macro_rules! trivially_parameterized_over_tcx {
+    ($($ty:ty),+ $(,)?) => {
+        $(
+            impl ParameterizedOverTcx for $ty {
+                #[allow(unused_lifetimes)]
+                type Value<'tcx> = $ty;
+            }
+        )*
+    }
+}
+
+trivially_parameterized_over_tcx! {
+    bool,
+    u64,
+    usize,
+    std::string::String,
+    // tidy-alphabetical-start
+    crate::rmeta::AttrFlags,
+    crate::rmeta::CrateDep,
+    crate::rmeta::CrateHeader,
+    crate::rmeta::CrateRoot,
+    crate::rmeta::IncoherentImpls,
+    crate::rmeta::RawDefId,
+    crate::rmeta::TraitImpls,
+    crate::rmeta::VariantData,
+    rustc_abi::ReprOptions,
+    rustc_ast::DelimArgs,
+    rustc_attr_data_structures::ConstStability,
+    rustc_attr_data_structures::DefaultBodyStability,
+    rustc_attr_data_structures::Deprecation,
+    rustc_attr_data_structures::Stability,
+    rustc_attr_data_structures::StrippedCfgItem<rustc_hir::def_id::DefIndex>,
+    rustc_hir::Attribute,
+    rustc_hir::Constness,
+    rustc_hir::CoroutineKind,
+    rustc_hir::Defaultness,
+    rustc_hir::LangItem,
+    rustc_hir::OpaqueTyOrigin<rustc_hir::def_id::DefId>,
+    rustc_hir::PreciseCapturingArgKind<Symbol, Symbol>,
+    rustc_hir::Safety,
+    rustc_hir::def::DefKind,
+    rustc_hir::def::DocLinkResMap,
+    rustc_hir::def_id::DefId,
+    rustc_hir::def_id::DefIndex,
+    rustc_hir::definitions::DefKey,
+    rustc_index::bit_set::DenseBitSet<u32>,
+    rustc_middle::metadata::ModChild,
+    rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrs,
+    rustc_middle::middle::debugger_visualizer::DebuggerVisualizerFile,
+    rustc_middle::middle::exported_symbols::SymbolExportInfo,
+    rustc_middle::middle::lib_features::FeatureStability,
+    rustc_middle::middle::resolve_bound_vars::ObjectLifetimeDefault,
+    rustc_middle::mir::ConstQualifs,
+    rustc_middle::ty::AnonConstKind,
+    rustc_middle::ty::AssocItemContainer,
+    rustc_middle::ty::AsyncDestructor,
+    rustc_middle::ty::Asyncness,
+    rustc_middle::ty::DeducedParamAttrs,
+    rustc_middle::ty::Destructor,
+    rustc_middle::ty::Generics,
+    rustc_middle::ty::ImplTraitInTraitData,
+    rustc_middle::ty::IntrinsicDef,
+    rustc_middle::ty::TraitDef,
+    rustc_middle::ty::Variance,
+    rustc_middle::ty::Visibility<DefIndex>,
+    rustc_middle::ty::adjustment::CoerceUnsizedInfo,
+    rustc_middle::ty::fast_reject::SimplifiedType,
+    rustc_session::config::TargetModifier,
+    rustc_session::cstore::ForeignModule,
+    rustc_session::cstore::LinkagePreference,
+    rustc_session::cstore::NativeLib,
+    rustc_span::ExpnData,
+    rustc_span::ExpnHash,
+    rustc_span::ExpnId,
+    rustc_span::Ident,
+    rustc_span::SourceFile,
+    rustc_span::Span,
+    rustc_span::Symbol,
+    rustc_span::hygiene::SyntaxContextKey,
+    // tidy-alphabetical-end
+}
+
+// HACK(compiler-errors): This macro rule can only take a fake path,
+// not a real, due to parsing ambiguity reasons.
+macro_rules! parameterized_over_tcx {
+    ($($( $fake_path:ident )::+ ),+ $(,)?) => {
+        $(
+            impl ParameterizedOverTcx for $( $fake_path )::+ <'static> {
+                type Value<'tcx> = $( $fake_path )::+ <'tcx>;
+            }
+        )*
+    }
+}
+
+parameterized_over_tcx! {
+    // tidy-alphabetical-start
+    crate::rmeta::DefPathHashMapRef,
+    rustc_middle::middle::exported_symbols::ExportedSymbol,
+    rustc_middle::mir::Body,
+    rustc_middle::mir::CoroutineLayout,
+    rustc_middle::mir::interpret::ConstAllocation,
+    rustc_middle::ty::Clause,
+    rustc_middle::ty::ClauseKind,
+    rustc_middle::ty::Const,
+    rustc_middle::ty::ConstConditions,
+    rustc_middle::ty::FnSig,
+    rustc_middle::ty::GenericPredicates,
+    rustc_middle::ty::ImplTraitHeader,
+    rustc_middle::ty::TraitRef,
+    rustc_middle::ty::Ty,
+    // tidy-alphabetical-end
+}