1 files changed, 8 insertions, 2 deletions

diff --git a/crates/hir_ty/src/lib.rs b/crates/hir_ty/src/lib.rs
index 5a8c97198..357bd92f9 100644
--- a/crates/hir_ty/src/lib.rs
+++ b/crates/hir_ty/src/lib.rs
@@ -29,8 +29,8 @@ use base_db::{salsa, CrateId};
 use hir_def::{
     expr::ExprId,
     type_ref::{Mutability, Rawness},
-    AdtId, AssocContainerId, DefWithBodyId, GenericDefId, HasModule, Lookup, TraitId, TypeAliasId,
-    TypeParamId,
+    AdtId, AssocContainerId, DefWithBodyId, GenericDefId, HasModule, LifetimeParamId, Lookup,
+    TraitId, TypeAliasId, TypeParamId,
 };
 use itertools::Itertools;
 
@@ -52,6 +52,12 @@ pub use traits::{InEnvironment, Obligation, ProjectionPredicate, TraitEnvironmen
 
 pub use chalk_ir::{BoundVar, DebruijnIndex};
 
+#[derive(Clone, PartialEq, Eq, Debug, Hash)]
+pub enum Lifetime {
+    Parameter(LifetimeParamId),
+    Static,
+}
+
 /// A type constructor or type name: this might be something like the primitive
 /// type `bool`, a struct like `Vec`, or things like function pointers or
 /// tuples.