From f12322aa2a858533cc413048f2f42350b596e515 Mon Sep 17 00:00:00 2001
From: Jacob Lifshay <programmerjake@gmail.com>
Date: Mon, 7 Oct 2024 21:33:56 -0700
Subject: [PATCH] remove interning contexts

---
 .../src/hdl_bundle.rs                         |   4 +-
 .../src/hdl_type_common.rs                    |   6 +-
 crates/fayalite/src/array.rs                  |   6 +-
 crates/fayalite/src/bundle.rs                 |   2 +-
 crates/fayalite/src/expr/ops.rs               |   8 +-
 crates/fayalite/src/int.rs                    |   2 +-
 crates/fayalite/src/intern.rs                 | 575 +++++-------------
 crates/fayalite/src/ty.rs                     |   2 +-
 8 files changed, 154 insertions(+), 451 deletions(-)

diff --git a/crates/fayalite-proc-macros-impl/src/hdl_bundle.rs b/crates/fayalite-proc-macros-impl/src/hdl_bundle.rs
index f3a589a..b13aa08 100644
--- a/crates/fayalite-proc-macros-impl/src/hdl_bundle.rs
+++ b/crates/fayalite-proc-macros-impl/src/hdl_bundle.rs
@@ -686,7 +686,7 @@ impl ToTokens for ParsedBundle {
                     let __retval = #mask_type_match_variant_ident {
                         #(#match_variant_body_fields)*
                     };
-                    ::fayalite::intern::Interned::<_>::into_inner(::fayalite::intern::Intern::intern_sized(__retval))
+                    ::fayalite::intern::Interned::into_inner(::fayalite::intern::Intern::intern_sized(__retval))
                 }
             }
             #[automatically_derived]
@@ -761,7 +761,7 @@ impl ToTokens for ParsedBundle {
                     let __retval = #match_variant_ident {
                         #(#match_variant_body_fields)*
                     };
-                    ::fayalite::intern::Interned::<_>::into_inner(::fayalite::intern::Intern::intern_sized(__retval))
+                    ::fayalite::intern::Interned::into_inner(::fayalite::intern::Intern::intern_sized(__retval))
                 }
             }
         }
diff --git a/crates/fayalite-proc-macros-impl/src/hdl_type_common.rs b/crates/fayalite-proc-macros-impl/src/hdl_type_common.rs
index e7561fe..239f32b 100644
--- a/crates/fayalite-proc-macros-impl/src/hdl_type_common.rs
+++ b/crates/fayalite-proc-macros-impl/src/hdl_type_common.rs
@@ -2718,7 +2718,7 @@ impl ParsedGenerics {
                             type Output = #next_target #next_type_generics;
 
                             fn index(&self, #param_token: #index_type) -> &Self::Output {
-                                ::fayalite::intern::Interned::<_>::into_inner(
+                                ::fayalite::intern::Interned::into_inner(
                                     ::fayalite::intern::Intern::intern_sized(#output_expr),
                                 )
                             }
@@ -2778,7 +2778,7 @@ impl ParsedGenerics {
                                 type Output = #next_target #next_target_args;
 
                                 fn index(&self, #param_token: #param_ident) -> &Self::Output {
-                                    ::fayalite::intern::Interned::<_>::into_inner(
+                                    ::fayalite::intern::Interned::into_inner(
                                         ::fayalite::intern::Intern::intern_sized(#output_expr),
                                     )
                                 }
@@ -2848,7 +2848,7 @@ impl ParsedGenerics {
                             type Output = #next_target #next_target_args;
 
                             fn index(&self, #param_token: __Param) -> &Self::Output {
-                                ::fayalite::intern::Interned::<_>::into_inner(
+                                ::fayalite::intern::Interned::into_inner(
                                     ::fayalite::intern::Intern::intern_sized(#output_expr),
                                 )
                             }
diff --git a/crates/fayalite/src/array.rs b/crates/fayalite/src/array.rs
index d543322..a3aea79 100644
--- a/crates/fayalite/src/array.rs
+++ b/crates/fayalite/src/array.rs
@@ -187,7 +187,7 @@ impl<T: Type, Len: Size> TypeWithDeref for ArrayType<T, Len> {
         let base = Expr::as_dyn_array(*this);
         let base_ty = Expr::ty(base);
         let retval = Vec::from_iter((0..base_ty.len()).map(|i| ArrayIndex::new(base, i).to_expr()));
-        Interned::<_>::into_inner(Intern::intern_sized(
+        Interned::into_inner(Intern::intern_sized(
             Len::ArrayMatch::<T>::try_from(retval)
                 .ok()
                 .expect("unreachable"),
@@ -202,7 +202,7 @@ impl<T: Type> Index<T> for ArrayWithoutGenerics {
     type Output = ArrayWithoutLen<T>;
 
     fn index(&self, element: T) -> &Self::Output {
-        Interned::<_>::into_inner(Intern::intern_sized(ArrayWithoutLen { element }))
+        Interned::into_inner(Intern::intern_sized(ArrayWithoutLen { element }))
     }
 }
 
@@ -215,6 +215,6 @@ impl<T: Type, L: SizeType> Index<L> for ArrayWithoutLen<T> {
     type Output = ArrayType<T, L::Size>;
 
     fn index(&self, len: L) -> &Self::Output {
-        Interned::<_>::into_inner(Intern::intern_sized(ArrayType::new(self.element, len)))
+        Interned::into_inner(Intern::intern_sized(ArrayType::new(self.element, len)))
     }
 }
diff --git a/crates/fayalite/src/bundle.rs b/crates/fayalite/src/bundle.rs
index 95c87f9..199c2b2 100644
--- a/crates/fayalite/src/bundle.rs
+++ b/crates/fayalite/src/bundle.rs
@@ -377,7 +377,7 @@ macro_rules! impl_tuples {
         impl<$($T: Type,)*> TypeWithDeref for ($($T,)*) {
             fn expr_deref(this: &Expr<Self>) -> &Self::MatchVariant {
                 let _ = this;
-                Interned::<_>::into_inner(($(Expr::field(*this, stringify!($num)),)*).intern_sized())
+                Interned::into_inner(($(Expr::field(*this, stringify!($num)),)*).intern_sized())
             }
         }
         impl<$($T: StaticType,)*> StaticType for ($($T,)*) {
diff --git a/crates/fayalite/src/expr/ops.rs b/crates/fayalite/src/expr/ops.rs
index 6069f20..3579641 100644
--- a/crates/fayalite/src/expr/ops.rs
+++ b/crates/fayalite/src/expr/ops.rs
@@ -2057,7 +2057,7 @@ impl<ElementType: Type, Len: Size> ExprIndex<usize> for ArrayType<ElementType, L
 
     #[track_caller]
     fn expr_index(this: &Expr<Self>, index: usize) -> &Expr<Self::Output> {
-        Interned::<_>::into_inner(
+        Interned::into_inner(
             ArrayIndex::<ElementType>::new(Expr::as_dyn_array(*this), index)
                 .to_expr()
                 .intern_sized(),
@@ -2154,7 +2154,7 @@ impl<ElementType: Type, Len: Size, Width: Size> ExprIndex<Expr<UIntType<Width>>>
     type Output = ElementType;
 
     fn expr_index(this: &Expr<Self>, index: Expr<UIntType<Width>>) -> &Expr<Self::Output> {
-        Interned::<_>::into_inner(
+        Interned::into_inner(
             DynArrayIndex::<ElementType>::new(Expr::as_dyn_array(*this), Expr::as_dyn_int(index))
                 .to_expr()
                 .intern_sized(),
@@ -2279,7 +2279,7 @@ macro_rules! impl_int_slice {
                 let base = Expr::as_dyn_int(*this);
                 let base_ty = Expr::ty(base);
                 let range = base_ty.slice_index_to_range(index);
-                Interned::<_>::into_inner($name::new(base, range).to_expr().intern_sized())
+                Interned::into_inner($name::new(base, range).to_expr().intern_sized())
             }
         }
 
@@ -2291,7 +2291,7 @@ macro_rules! impl_int_slice {
                 let base = Expr::as_dyn_int(*this);
                 let base_ty = Expr::ty(base);
                 assert!(index < base_ty.width());
-                Interned::<_>::into_inner(
+                Interned::into_inner(
                     $name::new(base, index..(index + 1))
                         .to_expr()
                         .cast_to_static::<Bool>()
diff --git a/crates/fayalite/src/int.rs b/crates/fayalite/src/int.rs
index e0d258a..f529198 100644
--- a/crates/fayalite/src/int.rs
+++ b/crates/fayalite/src/int.rs
@@ -301,7 +301,7 @@ macro_rules! impl_int {
             type Output = $name<Width::Size>;
 
             fn index(&self, width: Width) -> &Self::Output {
-                Interned::<_>::into_inner(Intern::intern_sized($name::new(width)))
+                Interned::into_inner(Intern::intern_sized($name::new(width)))
             }
         }
 
diff --git a/crates/fayalite/src/intern.rs b/crates/fayalite/src/intern.rs
index c38f26f..3780ad3 100644
--- a/crates/fayalite/src/intern.rs
+++ b/crates/fayalite/src/intern.rs
@@ -1,10 +1,7 @@
 // SPDX-License-Identifier: LGPL-3.0-or-later
 // See Notices.txt for copyright information
 #![allow(clippy::type_complexity)]
-use crate::{
-    intern::type_map::TypeIdMap,
-    util::{ConstBool, GenericConstBool},
-};
+use crate::intern::type_map::TypeIdMap;
 use bitvec::{ptr::BitPtr, slice::BitSlice, vec::BitVec};
 use hashbrown::{hash_map::RawEntryMut, HashMap, HashTable};
 use serde::{Deserialize, Serialize};
@@ -297,221 +294,94 @@ impl InternedCompare for str {
     }
 }
 
-pub trait InternContext: 'static + Send + Sync + Hash + Ord + fmt::Debug + Clone {
-    type InternedImpl<T: ?Sized + 'static + Send + Sync>: 'static + Send + Sync + Clone;
-    type InternedGuardImpl<T: ?Sized + 'static + Send + Sync>: 'static
-        + Send
-        + Sync
-        + Clone
-        + Borrow<T>;
-    type AllContextsAreIdentical: GenericConstBool;
-    fn interned_compare_key<T: InternedCompare + ?Sized + 'static + Send + Sync>(
-        v: &Self::InternedImpl<T>,
-    ) -> T::InternedCompareKey {
-        T::interned_compare_key_ref(Self::guard(v).borrow())
+pub trait Intern: Any + Send + Sync {
+    fn intern(&self) -> Interned<Self>;
+    fn intern_sized(self) -> Interned<Self>
+    where
+        Self: Clone,
+    {
+        Self::intern_owned(self)
     }
-    fn guard<T: ?Sized + 'static + Send + Sync>(
-        v: &Self::InternedImpl<T>,
-    ) -> Self::InternedGuardImpl<T>;
-    fn try_guard<T: ?Sized + 'static + Send + Sync>(
-        v: &Self::InternedImpl<T>,
-    ) -> Option<Self::InternedGuardImpl<T>>;
-    fn into_guard<T: ?Sized + 'static + Send + Sync>(
-        v: Self::InternedImpl<T>,
-    ) -> Self::InternedGuardImpl<T> {
-        Self::guard(&v)
+    fn intern_owned(this: <Self as ToOwned>::Owned) -> Interned<Self>
+    where
+        Self: ToOwned,
+    {
+        Self::intern_cow(Cow::Owned(this))
     }
-    fn unguard<T: ?Sized + 'static + Send + Sync>(
-        v: &Self::InternedGuardImpl<T>,
-    ) -> Self::InternedImpl<T>;
-    fn unguard_move<T: ?Sized + 'static + Send + Sync>(
-        v: Self::InternedGuardImpl<T>,
-    ) -> Self::InternedImpl<T> {
-        Self::unguard(&v)
+    fn intern_cow(this: Cow<'_, Self>) -> Interned<Self>
+    where
+        Self: ToOwned,
+    {
+        this.intern()
     }
-    fn alloc_str(&self, value: Cow<'_, str>) -> Self::InternedGuardImpl<str>;
-    fn alloc_slice<T: Clone + Send + Sync + 'static>(
-        &self,
-        value: Cow<'_, [T]>,
-    ) -> Self::InternedGuardImpl<[T]>;
-    fn alloc_sized<T: Clone + Send + Sync + 'static>(
-        &self,
-        value: Cow<'_, T>,
-    ) -> Self::InternedGuardImpl<T>;
-    fn interner<T: ?Sized + Send + Sync + 'static>(&self) -> &Interner<T, Self>;
 }
 
-pub trait BitSliceInternContext: InternContext {
-    fn alloc_bit_slice(&self, value: Cow<'_, BitSlice>) -> Self::InternedGuardImpl<BitSlice>;
+pub struct Interner<T: ?Sized + 'static + Send + Sync> {
+    map: Mutex<HashMap<&'static T, ()>>,
 }
 
-#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Default)]
-pub struct GlobalContext;
-
-impl InternContext for GlobalContext {
-    type InternedImpl<T: ?Sized + 'static + Send + Sync> = &'static T;
-    type InternedGuardImpl<T: ?Sized + 'static + Send + Sync> = &'static T;
-    type AllContextsAreIdentical = ConstBool<true>;
-
-    fn guard<T: ?Sized + 'static + Send + Sync>(
-        v: &Self::InternedImpl<T>,
-    ) -> Self::InternedGuardImpl<T> {
-        *v
-    }
-    fn try_guard<T: ?Sized + 'static + Send + Sync>(
-        v: &Self::InternedImpl<T>,
-    ) -> Option<Self::InternedGuardImpl<T>> {
-        Some(*v)
-    }
-    fn unguard<T: ?Sized + 'static + Send + Sync>(
-        v: &Self::InternedGuardImpl<T>,
-    ) -> Self::InternedImpl<T> {
-        *v
-    }
-    fn alloc_str(&self, value: Cow<'_, str>) -> Self::InternedGuardImpl<str> {
-        value.into_owned().leak()
-    }
-    fn alloc_slice<T: Clone + Send + Sync + 'static>(
-        &self,
-        value: Cow<'_, [T]>,
-    ) -> Self::InternedGuardImpl<[T]> {
-        value.into_owned().leak()
-    }
-    fn alloc_sized<T: Clone + Send + Sync + 'static>(
-        &self,
-        value: Cow<'_, T>,
-    ) -> Self::InternedGuardImpl<T> {
-        Box::leak(Box::new(value.into_owned()))
-    }
-    fn interner<T: ?Sized + 'static + Send + Sync>(&self) -> &Interner<T, Self> {
+impl<T: ?Sized + 'static + Send + Sync> Interner<T> {
+    fn get() -> &'static Interner<T> {
         static TYPE_ID_MAP: TypeIdMap = TypeIdMap::new();
         TYPE_ID_MAP.get_or_insert_default()
     }
 }
 
-impl BitSliceInternContext for GlobalContext {
-    fn alloc_bit_slice(&self, value: Cow<'_, BitSlice>) -> Self::InternedGuardImpl<BitSlice> {
-        value.into_owned().leak()
-    }
-}
-
-pub trait Intern<C: InternContext = GlobalContext>: Any + Send + Sync {
-    fn intern_with_ctx(&self, context: &C) -> Interned<Self, C>;
-    fn intern_sized_with_ctx(self, context: &C) -> Interned<Self, C>
-    where
-        Self: Clone,
-    {
-        Self::intern_owned_with_ctx(self, context)
-    }
-    fn intern_owned_with_ctx(this: <Self as ToOwned>::Owned, context: &C) -> Interned<Self, C>
-    where
-        Self: ToOwned,
-    {
-        Self::intern_cow_with_ctx(Cow::Owned(this), context)
-    }
-    fn intern_cow_with_ctx(this: Cow<'_, Self>, context: &C) -> Interned<Self, C>
-    where
-        Self: ToOwned,
-    {
-        this.intern_with_ctx(context)
-    }
-    fn intern(&self) -> Interned<Self, C>
-    where
-        C: InternContext<AllContextsAreIdentical = ConstBool<true>> + Default,
-    {
-        self.intern_with_ctx(&C::default())
-    }
-    fn intern_sized(self) -> Interned<Self, C>
-    where
-        Self: Clone,
-        C: InternContext<AllContextsAreIdentical = ConstBool<true>> + Default,
-    {
-        self.intern_sized_with_ctx(&C::default())
-    }
-    fn intern_owned(this: <Self as ToOwned>::Owned) -> Interned<Self, C>
-    where
-        Self: ToOwned,
-        C: InternContext<AllContextsAreIdentical = ConstBool<true>> + Default,
-    {
-        Self::intern_owned_with_ctx(this, &C::default())
-    }
-    fn intern_cow(this: Cow<'_, Self>) -> Interned<Self, C>
-    where
-        Self: ToOwned,
-        C: InternContext<AllContextsAreIdentical = ConstBool<true>> + Default,
-    {
-        Self::intern_cow_with_ctx(this, &C::default())
-    }
-}
-
-pub struct Interner<T: ?Sized + 'static + Send + Sync, C: InternContext> {
-    map: Mutex<HashMap<C::InternedGuardImpl<T>, ()>>,
-    _phantom: PhantomData<fn(&C)>,
-}
-
-impl<T: ?Sized + 'static + Send + Sync, C: InternContext> Default for Interner<T, C> {
+impl<T: ?Sized + 'static + Send + Sync> Default for Interner<T> {
     fn default() -> Self {
         Self {
             map: Default::default(),
-            _phantom: Default::default(),
         }
     }
 }
 
-impl<T: ?Sized + 'static + Send + Sync + Hash + Eq + ToOwned, C: InternContext> Interner<T, C> {
-    fn intern<F: FnOnce(Cow<'_, T>) -> C::InternedGuardImpl<T>>(
+impl<T: ?Sized + 'static + Send + Sync + Hash + Eq + ToOwned> Interner<T> {
+    fn intern<F: FnOnce(Cow<'_, T>) -> &'static T>(
         &self,
         alloc: F,
         value: Cow<'_, T>,
-    ) -> Interned<T, C> {
+    ) -> Interned<T> {
         let mut map = self.map.lock().unwrap();
         let hasher = map.hasher().clone();
         let hash = hasher.hash_one(&*value);
-        let inner = match map
-            .raw_entry_mut()
-            .from_hash(hash, |k| k.borrow() == &*value)
-        {
-            RawEntryMut::Occupied(entry) => C::unguard(entry.key()),
-            RawEntryMut::Vacant(entry) => C::unguard(
-                entry
-                    .insert_with_hasher(hash, alloc(value), (), |k| hasher.hash_one(k.borrow()))
-                    .0,
-            ),
+        let inner = match map.raw_entry_mut().from_hash(hash, |k| **k == *value) {
+            RawEntryMut::Occupied(entry) => *entry.key(),
+            RawEntryMut::Vacant(entry) => {
+                *entry
+                    .insert_with_hasher(hash, alloc(value), (), |k| hasher.hash_one(&**k))
+                    .0
+            }
         };
-        Interned {
-            inner,
-            _phantom: PhantomData,
-        }
+        Interned { inner }
     }
 }
 
-impl<T: Clone + 'static + Send + Sync + Hash + Eq, C: InternContext> Interner<T, C> {
-    fn intern_sized(&self, context: &C, value: Cow<'_, T>) -> Interned<T, C> {
-        self.intern(|value| context.alloc_sized(value), value)
+impl<T: Clone + 'static + Send + Sync + Hash + Eq> Interner<T> {
+    fn intern_sized(&self, value: Cow<'_, T>) -> Interned<T> {
+        self.intern(|value| Box::leak(Box::new(value.into_owned())), value)
     }
 }
 
-impl<T: Clone + 'static + Send + Sync + Hash + Eq, C: InternContext> Interner<[T], C> {
-    fn intern_slice(&self, context: &C, value: Cow<'_, [T]>) -> Interned<[T], C> {
-        self.intern(|value| context.alloc_slice(value), value)
+impl<T: Clone + 'static + Send + Sync + Hash + Eq> Interner<[T]> {
+    fn intern_slice(&self, value: Cow<'_, [T]>) -> Interned<[T]> {
+        self.intern(|value| value.into_owned().leak(), value)
     }
 }
 
-impl<C: BitSliceInternContext> Interner<BitSlice, C> {
-    fn intern_bit_slice(&self, context: &C, value: Cow<'_, BitSlice>) -> Interned<BitSlice, C> {
-        self.intern(|value| context.alloc_bit_slice(value), value)
+impl Interner<BitSlice> {
+    fn intern_bit_slice(&self, value: Cow<'_, BitSlice>) -> Interned<BitSlice> {
+        self.intern(|value| value.into_owned().leak(), value)
     }
 }
 
-impl<C: InternContext> Interner<str, C> {
-    fn intern_str(&self, context: &C, value: Cow<'_, str>) -> Interned<str, C> {
-        self.intern(|value| context.alloc_str(value), value)
+impl Interner<str> {
+    fn intern_str(&self, value: Cow<'_, str>) -> Interned<str> {
+        self.intern(|value| value.into_owned().leak(), value)
     }
 }
 
-pub struct Interned<T: ?Sized + 'static + Send + Sync, C: InternContext = GlobalContext> {
-    inner: C::InternedImpl<T>,
-    _phantom: PhantomData<&'static C>,
+pub struct Interned<T: ?Sized + 'static + Send + Sync> {
+    inner: &'static T,
 }
 
 macro_rules! forward_fmt_trait {
@@ -522,23 +392,9 @@ macro_rules! forward_fmt_trait {
             }
         }
 
-        impl<T: ?Sized + 'static + Send + Sync + fmt::$Tr, C: InternContext> fmt::$Tr
-            for Interned<T, C>
-        {
+        impl<T: ?Sized + 'static + Send + Sync + fmt::$Tr> fmt::$Tr for Interned<T> {
             fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-                if let Some(guard) = C::try_guard(&self.inner) {
-                    guard.borrow().fmt(f)
-                } else {
-                    write!(f, "<Expired>")
-                }
-            }
-        }
-
-        impl<T: ?Sized + 'static + Send + Sync + fmt::$Tr, C: InternContext> fmt::$Tr
-            for Guard<T, C>
-        {
-            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-                self.inner.borrow().fmt(f)
+                self.inner.fmt(f)
             }
         }
     };
@@ -554,18 +410,16 @@ forward_fmt_trait!(UpperExp);
 forward_fmt_trait!(UpperHex);
 
 #[derive(Clone, Debug)]
-pub struct InternedSliceIter<T: Clone + 'static + Send + Sync, C: InternContext> {
-    slice: Interned<[T], C>,
+pub struct InternedSliceIter<T: Clone + 'static + Send + Sync> {
+    slice: Interned<[T]>,
     index: std::ops::Range<usize>,
 }
 
-impl<T: Clone + 'static + Send + Sync, C: InternContext> Iterator for InternedSliceIter<T, C> {
+impl<T: Clone + 'static + Send + Sync> Iterator for InternedSliceIter<T> {
     type Item = T;
 
     fn next(&mut self) -> Option<Self::Item> {
-        self.index
-            .next()
-            .map(|index| self.slice.guard()[index].clone())
+        self.index.next().map(|index| self.slice[index].clone())
     }
 
     fn size_hint(&self) -> (usize, Option<usize>) {
@@ -573,233 +427,186 @@ impl<T: Clone + 'static + Send + Sync, C: InternContext> Iterator for InternedSl
     }
 }
 
-impl<T: Clone + 'static + Send + Sync, C: InternContext> DoubleEndedIterator
-    for InternedSliceIter<T, C>
-{
+impl<T: Clone + 'static + Send + Sync> DoubleEndedIterator for InternedSliceIter<T> {
     fn next_back(&mut self) -> Option<Self::Item> {
         self.index
             .next_back()
-            .map(|index| self.slice.guard()[index].clone())
+            .map(|index| self.slice[index].clone())
     }
 }
 
-impl<T: Clone + 'static + Send + Sync, C: InternContext> FusedIterator for InternedSliceIter<T, C> {}
+impl<T: Clone + 'static + Send + Sync> FusedIterator for InternedSliceIter<T> {}
 
-impl<T: Clone + 'static + Send + Sync, C: InternContext> ExactSizeIterator
-    for InternedSliceIter<T, C>
-{
-}
+impl<T: Clone + 'static + Send + Sync> ExactSizeIterator for InternedSliceIter<T> {}
 
-impl<T: Clone + 'static + Send + Sync, C: InternContext> IntoIterator for Interned<[T], C> {
+impl<T: Clone + 'static + Send + Sync> IntoIterator for Interned<[T]> {
     type Item = T;
-    type IntoIter = InternedSliceIter<T, C>;
+    type IntoIter = InternedSliceIter<T>;
 
     fn into_iter(self) -> Self::IntoIter {
         InternedSliceIter {
-            index: 0..self.guard().len(),
+            index: 0..self.len(),
             slice: self,
         }
     }
 }
 
-impl<'a, T: 'static + Send + Sync, C: InternContext> IntoIterator for &'a Interned<[T], C>
-where
-    C::InternedImpl<[T]>: Borrow<[T]>,
-{
+impl<'a, T: 'static + Send + Sync> IntoIterator for &'a Interned<[T]> {
     type Item = &'a T;
     type IntoIter = std::slice::Iter<'a, T>;
 
     fn into_iter(self) -> Self::IntoIter {
-        self.inner.borrow().iter()
+        self.inner.iter()
     }
 }
 
-impl<'a, T: 'static + Send + Sync, C: InternContext> IntoIterator for &'a mut Interned<[T], C>
-where
-    C::InternedImpl<[T]>: Borrow<[T]>,
-{
+impl<'a, T: 'static + Send + Sync> IntoIterator for &'a mut Interned<[T]> {
     type Item = &'a T;
     type IntoIter = std::slice::Iter<'a, T>;
 
     fn into_iter(self) -> Self::IntoIter {
-        self.inner.borrow().iter()
+        self.inner.iter()
     }
 }
 
-impl<I: Clone, C: InternContext<AllContextsAreIdentical = ConstBool<true>> + Default>
-    FromIterator<I> for Interned<[I], C>
+impl<I: Clone> FromIterator<I> for Interned<[I]>
 where
-    [I]: Intern<C>,
+    [I]: Intern,
 {
     fn from_iter<T: IntoIterator<Item = I>>(iter: T) -> Self {
         Intern::intern_owned(Vec::from_iter(iter))
     }
 }
 
-impl<T: 'static + Clone + Send + Sync, C: InternContext> From<Interned<[T], C>> for Vec<T> {
-    fn from(value: Interned<[T], C>) -> Self {
-        Vec::from(&*value.guard())
+impl<T: 'static + Clone + Send + Sync> From<Interned<[T]>> for Vec<T> {
+    fn from(value: Interned<[T]>) -> Self {
+        Vec::from(&*value)
     }
 }
 
-impl<T: 'static + Clone + Send + Sync, C: InternContext> From<Interned<[T], C>> for Box<[T]> {
-    fn from(value: Interned<[T], C>) -> Self {
-        Box::from(&*value.guard())
+impl<T: 'static + Clone + Send + Sync> From<Interned<[T]>> for Box<[T]> {
+    fn from(value: Interned<[T]>) -> Self {
+        Box::from(&*value)
     }
 }
 
-impl<C: InternContext> From<Interned<str, C>> for String {
-    fn from(value: Interned<str, C>) -> Self {
-        String::from(&*value.guard())
+impl From<Interned<str>> for String {
+    fn from(value: Interned<str>) -> Self {
+        String::from(&*value)
     }
 }
 
-impl<I, C: InternContext<AllContextsAreIdentical = ConstBool<true>> + Default> Default
-    for Interned<[I], C>
+impl<I> Default for Interned<[I]>
 where
-    [I]: Intern<C>,
+    [I]: Intern,
 {
     fn default() -> Self {
         [][..].intern()
     }
 }
 
-impl<C: InternContext<AllContextsAreIdentical = ConstBool<true>> + Default> Default
-    for Interned<str, C>
-where
-    str: Intern<C>,
-{
+impl Default for Interned<str> {
     fn default() -> Self {
         "".intern()
     }
 }
 
-impl<C: BitSliceInternContext<AllContextsAreIdentical = ConstBool<true>> + Default> Default
-    for Interned<BitSlice, C>
-where
-    BitSlice: Intern<C>,
-{
+impl Default for Interned<BitSlice> {
     fn default() -> Self {
         <&BitSlice>::default().intern()
     }
 }
 
-impl<I: Clone + Default, C: InternContext<AllContextsAreIdentical = ConstBool<true>> + Default>
-    Default for Interned<I, C>
+impl<I: Clone + Default> Default for Interned<I>
 where
-    I: Intern<C>,
+    I: Intern,
 {
     fn default() -> Self {
         I::default().intern()
     }
 }
 
-impl<T: ?Sized + 'static + Send + Sync, C: InternContext> Interned<T, C> {
+impl<T: ?Sized + 'static + Send + Sync> Interned<T> {
     pub fn cast_unchecked<U: ?Sized + 'static + Send + Sync>(
         this: Self,
-        f: impl FnOnce(C::InternedImpl<T>) -> C::InternedImpl<U>,
-    ) -> Interned<U, C> {
+        f: impl FnOnce(&'static T) -> &'static U,
+    ) -> Interned<U> {
         Interned {
             inner: f(this.inner),
-            _phantom: PhantomData,
         }
     }
     pub fn try_cast_unchecked<U: ?Sized + 'static + Send + Sync, E>(
         this: Self,
-        f: impl FnOnce(C::InternedImpl<T>) -> Result<C::InternedImpl<U>, E>,
-    ) -> Result<Interned<U, C>, E> {
+        f: impl FnOnce(&'static T) -> Result<&'static U, E>,
+    ) -> Result<Interned<U>, E> {
         Ok(Interned {
             inner: f(this.inner)?,
-            _phantom: PhantomData,
         })
     }
-    pub fn into_inner(this: Self) -> C::InternedImpl<T> {
+    pub fn into_inner(this: Self) -> &'static T {
         this.inner
     }
-    pub fn get_ref(this: &Self) -> &C::InternedImpl<T> {
+    pub fn get_ref(this: &Self) -> &&'static T {
         &this.inner
     }
-    pub fn guard(&self) -> Guard<T, C> {
-        Guard {
-            inner: C::guard(&self.inner),
-            _phantom: PhantomData,
-        }
-    }
 }
 
-impl<T: ?Sized + 'static + Send + Sync, C: InternContext> Clone for Interned<T, C> {
+impl<T: ?Sized + 'static + Send + Sync> Clone for Interned<T> {
     fn clone(&self) -> Self {
-        Interned {
-            inner: self.inner.clone(),
-            _phantom: PhantomData,
-        }
+        *self
     }
 }
 
-impl<T: ?Sized + 'static + Send + Sync, C: InternContext> Copy for Interned<T, C> where
-    C::InternedImpl<T>: Copy
-{
-}
+impl<T: ?Sized + 'static + Send + Sync> Copy for Interned<T> where &'static T: Copy {}
 
-impl<T: ?Sized + 'static + Send + Sync, C: InternContext> Deref for Interned<T, C>
+impl<T: ?Sized + 'static + Send + Sync> Deref for Interned<T>
 where
-    C::InternedImpl<T>: Borrow<T>,
+    &'static T: Borrow<T>,
 {
     type Target = T;
 
     fn deref(&self) -> &Self::Target {
-        self.inner.borrow()
+        self.inner
     }
 }
 
-impl<T: ?Sized + 'static + Send + Sync + InternedCompare, C: InternContext> PartialEq
-    for Interned<T, C>
-{
+impl<T: ?Sized + 'static + Send + Sync + InternedCompare> PartialEq for Interned<T> {
     fn eq(&self, other: &Self) -> bool {
-        <C as InternContext>::interned_compare_key(&self.inner)
-            == <C as InternContext>::interned_compare_key(&other.inner)
+        T::interned_compare_key_ref(self.inner) == T::interned_compare_key_ref(other.inner)
     }
 }
 
-impl<T: ?Sized + 'static + Send + Sync + InternedCompare, C: InternContext> Eq for Interned<T, C> {}
+impl<T: ?Sized + 'static + Send + Sync + InternedCompare> Eq for Interned<T> {}
 
-impl<T: ?Sized + 'static + Send + Sync + InternedCompare, C: InternContext> PartialOrd
-    for Interned<T, C>
-{
+impl<T: ?Sized + 'static + Send + Sync + InternedCompare> PartialOrd for Interned<T> {
     fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
         Some(self.cmp(other))
     }
 }
 
-impl<T: ?Sized + 'static + Send + Sync + InternedCompare, C: InternContext> Ord for Interned<T, C> {
+impl<T: ?Sized + 'static + Send + Sync + InternedCompare> Ord for Interned<T> {
     fn cmp(&self, other: &Self) -> Ordering {
-        <C as InternContext>::interned_compare_key(&self.inner)
-            .cmp(&<C as InternContext>::interned_compare_key(&other.inner))
+        T::interned_compare_key_ref(self.inner).cmp(&T::interned_compare_key_ref(other.inner))
     }
 }
 
-impl<T: ?Sized + 'static + Send + Sync + InternedCompare, C: InternContext> Hash
-    for Interned<T, C>
-{
+impl<T: ?Sized + 'static + Send + Sync + InternedCompare> Hash for Interned<T> {
     fn hash<H: Hasher>(&self, state: &mut H) {
-        <C as InternContext>::interned_compare_key(&self.inner).hash(state);
+        T::interned_compare_key_ref(self.inner).hash(state);
     }
 }
 
-impl<T: ?Sized + 'static + Send + Sync + Serialize, C: InternContext> Serialize for Interned<T, C> {
+impl<T: ?Sized + 'static + Send + Sync + Serialize> Serialize for Interned<T> {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
     where
         S: serde::Serializer,
     {
-        self.guard().serialize(serializer)
+        T::serialize(self, serializer)
     }
 }
 
-impl<
-        'de,
-        T: 'static + Send + Sync + Deserialize<'de> + Clone + Intern<C>,
-        C: InternContext<AllContextsAreIdentical = ConstBool<true>> + Default,
-    > Deserialize<'de> for Interned<T, C>
+impl<'de, T: 'static + Send + Sync + Deserialize<'de> + Clone + Intern> Deserialize<'de>
+    for Interned<T>
 {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
     where
@@ -809,13 +616,9 @@ impl<
     }
 }
 
-impl<
-        'de,
-        T: 'static + Send + Sync + Clone,
-        C: InternContext<AllContextsAreIdentical = ConstBool<true>> + Default,
-    > Deserialize<'de> for Interned<[T], C>
+impl<'de, T: 'static + Send + Sync + Clone> Deserialize<'de> for Interned<[T]>
 where
-    [T]: Intern<C>,
+    [T]: Intern,
     Vec<T>: Deserialize<'de>,
 {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
@@ -826,11 +629,7 @@ where
     }
 }
 
-impl<'de, C: BitSliceInternContext<AllContextsAreIdentical = ConstBool<true>> + Default>
-    Deserialize<'de> for Interned<BitSlice, C>
-where
-    BitSlice: Intern<C>,
-{
+impl<'de> Deserialize<'de> for Interned<BitSlice> {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
     where
         D: serde::Deserializer<'de>,
@@ -839,11 +638,7 @@ where
     }
 }
 
-impl<'de, C: InternContext<AllContextsAreIdentical = ConstBool<true>> + Default> Deserialize<'de>
-    for Interned<str, C>
-where
-    str: Intern<C>,
-{
+impl<'de> Deserialize<'de> for Interned<str> {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
     where
         D: serde::Deserializer<'de>,
@@ -852,175 +647,83 @@ where
     }
 }
 
-pub struct Guard<T: ?Sized + 'static + Send + Sync, C: InternContext = GlobalContext> {
-    inner: C::InternedGuardImpl<T>,
-    _phantom: PhantomData<&'static C>,
-}
-
-impl<T: ?Sized + 'static + Send + Sync, C: InternContext> Guard<T, C> {
-    pub fn cast_unchecked<U: ?Sized + 'static + Send + Sync>(
-        this: Self,
-        f: impl FnOnce(C::InternedGuardImpl<T>) -> C::InternedGuardImpl<U>,
-    ) -> Guard<U, C> {
-        Guard {
-            inner: f(this.inner),
-            _phantom: PhantomData,
-        }
-    }
-    pub fn try_cast_unchecked<U: ?Sized + 'static + Send + Sync, E>(
-        this: Self,
-        f: impl FnOnce(C::InternedGuardImpl<T>) -> Result<C::InternedGuardImpl<U>, E>,
-    ) -> Result<Guard<U, C>, E> {
-        Ok(Guard {
-            inner: f(this.inner)?,
-            _phantom: PhantomData,
-        })
-    }
-    pub fn into_inner(this: Self) -> C::InternedGuardImpl<T> {
-        this.inner
-    }
-    pub fn get_ref(this: &Self) -> &C::InternedGuardImpl<T> {
-        &this.inner
-    }
-    pub fn unguard(&self) -> Interned<T, C> {
-        Interned {
-            inner: C::unguard(&self.inner),
-            _phantom: PhantomData,
-        }
-    }
-}
-
-impl<T: ?Sized + 'static + Send + Sync, C: InternContext> Clone for Guard<T, C> {
-    fn clone(&self) -> Self {
-        Guard {
-            inner: self.inner.clone(),
-            _phantom: PhantomData,
-        }
-    }
-}
-
-impl<T: ?Sized + 'static + Send + Sync, C: InternContext> Copy for Guard<T, C> where
-    C::InternedGuardImpl<T>: Copy
-{
-}
-
-impl<T: ?Sized + 'static + Send + Sync, C: InternContext> Deref for Guard<T, C> {
-    type Target = T;
-
-    fn deref(&self) -> &Self::Target {
-        self.inner.borrow()
-    }
-}
-
-impl<T: ?Sized + 'static + Send + Sync + InternedCompare, C: InternContext> PartialEq
-    for Guard<T, C>
-{
-    fn eq(&self, other: &Self) -> bool {
-        T::interned_compare_key_ref(self.inner.borrow())
-            == T::interned_compare_key_ref(other.inner.borrow())
-    }
-}
-
-impl<T: ?Sized + 'static + Send + Sync + InternedCompare, C: InternContext> Eq for Guard<T, C> {}
-
-impl<T: ?Sized + 'static + Send + Sync + InternedCompare, C: InternContext> PartialOrd
-    for Guard<T, C>
-{
-    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
-        Some(self.cmp(other))
-    }
-}
-
-impl<T: ?Sized + 'static + Send + Sync + InternedCompare, C: InternContext> Ord for Guard<T, C> {
-    fn cmp(&self, other: &Self) -> Ordering {
-        T::interned_compare_key_ref(self.inner.borrow())
-            .cmp(&T::interned_compare_key_ref(other.inner.borrow()))
-    }
-}
-
-impl<T: ?Sized + 'static + Send + Sync + InternedCompare, C: InternContext> Hash for Guard<T, C> {
-    fn hash<H: Hasher>(&self, state: &mut H) {
-        T::interned_compare_key_ref(self.inner.borrow()).hash(state);
-    }
-}
-
-impl<T: Clone + Send + Sync + 'static + Hash + Eq, C: InternContext> Intern<C> for T {
-    fn intern_with_ctx(&self, context: &C) -> Interned<Self, C> {
-        Self::intern_cow_with_ctx(Cow::Borrowed(self), context)
+impl<T: Clone + Send + Sync + 'static + Hash + Eq> Intern for T {
+    fn intern(&self) -> Interned<Self> {
+        Self::intern_cow(Cow::Borrowed(self))
     }
 
-    fn intern_owned_with_ctx(this: <Self as ToOwned>::Owned, context: &C) -> Interned<Self, C>
+    fn intern_owned(this: <Self as ToOwned>::Owned) -> Interned<Self>
     where
         Self: ToOwned,
     {
-        Self::intern_cow_with_ctx(Cow::Owned(this), context)
+        Self::intern_cow(Cow::Owned(this))
     }
 
-    fn intern_cow_with_ctx(this: Cow<'_, Self>, context: &C) -> Interned<Self, C>
+    fn intern_cow(this: Cow<'_, Self>) -> Interned<Self>
     where
         Self: ToOwned,
     {
-        context.interner().intern_sized(context, this)
+        Interner::get().intern_sized(this)
     }
 }
 
-impl<T: Clone + Send + Sync + 'static + Hash + Eq, C: InternContext> Intern<C> for [T] {
-    fn intern_with_ctx(&self, context: &C) -> Interned<Self, C> {
-        Self::intern_cow_with_ctx(Cow::Borrowed(self), context)
+impl<T: Clone + Send + Sync + 'static + Hash + Eq> Intern for [T] {
+    fn intern(&self) -> Interned<Self> {
+        Self::intern_cow(Cow::Borrowed(self))
     }
 
-    fn intern_owned_with_ctx(this: <Self as ToOwned>::Owned, context: &C) -> Interned<Self, C>
+    fn intern_owned(this: <Self as ToOwned>::Owned) -> Interned<Self>
     where
         Self: ToOwned,
     {
-        Self::intern_cow_with_ctx(Cow::Owned(this), context)
+        Self::intern_cow(Cow::Owned(this))
     }
 
-    fn intern_cow_with_ctx(this: Cow<'_, Self>, context: &C) -> Interned<Self, C>
+    fn intern_cow(this: Cow<'_, Self>) -> Interned<Self>
     where
         Self: ToOwned,
     {
-        context.interner().intern_slice(context, this)
+        Interner::get().intern_slice(this)
     }
 }
 
-impl<C: BitSliceInternContext> Intern<C> for BitSlice {
-    fn intern_with_ctx(&self, context: &C) -> Interned<Self, C> {
-        Self::intern_cow_with_ctx(Cow::Borrowed(self), context)
+impl Intern for BitSlice {
+    fn intern(&self) -> Interned<Self> {
+        Self::intern_cow(Cow::Borrowed(self))
     }
 
-    fn intern_owned_with_ctx(this: <Self as ToOwned>::Owned, context: &C) -> Interned<Self, C>
+    fn intern_owned(this: <Self as ToOwned>::Owned) -> Interned<Self>
     where
         Self: ToOwned,
     {
-        Self::intern_cow_with_ctx(Cow::Owned(this), context)
+        Self::intern_cow(Cow::Owned(this))
     }
 
-    fn intern_cow_with_ctx(this: Cow<'_, Self>, context: &C) -> Interned<Self, C>
+    fn intern_cow(this: Cow<'_, Self>) -> Interned<Self>
     where
         Self: ToOwned,
     {
-        context.interner().intern_bit_slice(context, this)
+        Interner::get().intern_bit_slice(this)
     }
 }
 
-impl<C: InternContext> Intern<C> for str {
-    fn intern_with_ctx(&self, context: &C) -> Interned<Self, C> {
-        Self::intern_cow_with_ctx(Cow::Borrowed(self), context)
+impl Intern for str {
+    fn intern(&self) -> Interned<Self> {
+        Self::intern_cow(Cow::Borrowed(self))
     }
 
-    fn intern_owned_with_ctx(this: <Self as ToOwned>::Owned, context: &C) -> Interned<Self, C>
+    fn intern_owned(this: <Self as ToOwned>::Owned) -> Interned<Self>
     where
         Self: ToOwned,
     {
-        Self::intern_cow_with_ctx(Cow::Owned(this), context)
+        Self::intern_cow(Cow::Owned(this))
     }
 
-    fn intern_cow_with_ctx(this: Cow<'_, Self>, context: &C) -> Interned<Self, C>
+    fn intern_cow(this: Cow<'_, Self>) -> Interned<Self>
     where
         Self: ToOwned,
     {
-        context.interner().intern_str(context, this)
+        Interner::get().intern_str(this)
     }
 }
 
diff --git a/crates/fayalite/src/ty.rs b/crates/fayalite/src/ty.rs
index 380d2e6..69080c9 100644
--- a/crates/fayalite/src/ty.rs
+++ b/crates/fayalite/src/ty.rs
@@ -330,6 +330,6 @@ impl<T: Type> Index<T> for AsMaskWithoutGenerics {
     type Output = T::MaskType;
 
     fn index(&self, ty: T) -> &Self::Output {
-        Interned::<_>::into_inner(Intern::intern_sized(ty.mask_type()))
+        Interned::into_inner(Intern::intern_sized(ty.mask_type()))
     }
 }