1 files changed, 31 insertions, 8 deletions

diff --git a/crates/hir_ty/src/display.rs b/crates/hir_ty/src/display.rs
index f31e6b108..01c7ef91f 100644
--- a/crates/hir_ty/src/display.rs
+++ b/crates/hir_ty/src/display.rs
@@ -1,8 +1,10 @@
 //! FIXME: write short doc here
 
-use std::{array, fmt};
+use std::{
+    array,
+    fmt::{self, Debug},
+};
 
-use chalk_ir::Mutability;
 use hir_def::{
     db::DefDatabase,
     find_path,
@@ -16,9 +18,10 @@ use hir_def::{
 use hir_expand::name::Name;
 
 use crate::{
-    db::HirDatabase, from_assoc_type_id, from_foreign_def_id, from_placeholder_idx, primitive,
-    to_assoc_type_id, traits::chalk::from_chalk, utils::generics, AdtId, AliasEq, AliasTy,
-    CallableDefId, CallableSig, DomainGoal, GenericArg, ImplTraitId, Interner, Lifetime, OpaqueTy,
+    db::HirDatabase, from_assoc_type_id, from_foreign_def_id, from_placeholder_idx,
+    lt_from_placeholder_idx, primitive, to_assoc_type_id, traits::chalk::from_chalk,
+    utils::generics, AdtId, AliasEq, AliasTy, CallableDefId, CallableSig, DomainGoal, GenericArg,
+    ImplTraitId, Interner, Lifetime, LifetimeData, LifetimeOutlives, Mutability, OpaqueTy,
     ProjectionTy, QuantifiedWhereClause, Scalar, TraitRef, Ty, TyExt, TyKind, WhereClause,
 };
 
@@ -827,15 +830,35 @@ impl HirDisplay for WhereClause {
     }
 }
 
+impl HirDisplay for LifetimeOutlives {
+    fn hir_fmt(&self, f: &mut HirFormatter) -> Result<(), HirDisplayError> {
+        self.a.hir_fmt(f)?;
+        write!(f, ": ")?;
+        self.b.hir_fmt(f)
+    }
+}
+
 impl HirDisplay for Lifetime {
     fn hir_fmt(&self, f: &mut HirFormatter) -> Result<(), HirDisplayError> {
+        self.interned().hir_fmt(f)
+    }
+}
+
+impl HirDisplay for LifetimeData {
+    fn hir_fmt(&self, f: &mut HirFormatter) -> Result<(), HirDisplayError> {
         match self {
-            Lifetime::Parameter(id) => {
+            LifetimeData::BoundVar(idx) => write!(f, "?{}.{}", idx.debruijn.depth(), idx.index),
+            LifetimeData::InferenceVar(_) => write!(f, "_"),
+            LifetimeData::Placeholder(idx) => {
+                let id = lt_from_placeholder_idx(f.db, *idx);
                 let generics = generics(f.db.upcast(), id.parent);
                 let param_data = &generics.params.lifetimes[id.local_id];
-                write!(f, "{}", &param_data.name)
+                write!(f, "{}", param_data.name)
             }
-            Lifetime::Static => write!(f, "'static"),
+            LifetimeData::Static => write!(f, "'static"),
+            LifetimeData::Empty(_) => Ok(()),
+            LifetimeData::Erased => Ok(()),
+            LifetimeData::Phantom(_, _) => Ok(()),
         }
     }
 }