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internal: intern TypeBounds

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Doesn't save much memory (~2 mb), but interning things is generally a
good pattern to follow
This commit is contained in:
Jonas Schievink 2021-05-24 15:13:23 +02:00
parent 05fc97e31b
commit 8ebb8d29e1
12 changed files with 49 additions and 27 deletions
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20
crates/hir_def/src/generics.rs
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@ -68,9 +68,19 @@ pub struct GenericParams {
/// associated type bindings like `Iterator<Item = u32>`.
#[derive(Clone, PartialEq, Eq, Debug, Hash)]
pub enum WherePredicate {
TypeBound { target: WherePredicateTypeTarget, bound: TypeBound },
Lifetime { target: LifetimeRef, bound: LifetimeRef },
ForLifetime { lifetimes: Box<[Name]>, target: WherePredicateTypeTarget, bound: TypeBound },
TypeBound {
target: WherePredicateTypeTarget,
bound: Interned<TypeBound>,
},
Lifetime {
target: LifetimeRef,
bound: LifetimeRef,
},
ForLifetime {
lifetimes: Box<[Name]>,
target: WherePredicateTypeTarget,
bound: Interned<TypeBound>,
},
}
#[derive(Clone, PartialEq, Eq, Debug, Hash)]
@ -339,11 +349,11 @@ impl GenericParams {
Some(hrtb_lifetimes) => WherePredicate::ForLifetime {
lifetimes: hrtb_lifetimes.clone(),
target: WherePredicateTypeTarget::TypeRef(Interned::new(type_ref)),
bound,
bound: Interned::new(bound),
},
None => WherePredicate::TypeBound {
target: WherePredicateTypeTarget::TypeRef(Interned::new(type_ref)),
bound,
bound: Interned::new(bound),
},
},
(Either::Right(lifetime), TypeBound::Lifetime(bound)) => {