4 files changed, 41 insertions, 11 deletions

diff --git a/crates/hir/src/code_model.rs b/crates/hir/src/code_model.rs
index e9bb4f541..35b532602 100644
--- a/crates/hir/src/code_model.rs
+++ b/crates/hir/src/code_model.rs
@@ -6,7 +6,6 @@ use base_db::{CrateDisplayName, CrateId, Edition, FileId};
 use either::Either;
 use hir_def::{
     adt::{ReprKind, StructKind, VariantData},
-    builtin_type::BuiltinType,
     expr::{BindingAnnotation, LabelId, Pat, PatId},
     import_map,
     item_tree::ItemTreeNode,
@@ -245,7 +244,7 @@ impl ModuleDef {
             ModuleDef::Const(it) => it.name(db),
             ModuleDef::Static(it) => it.name(db),
 
-            ModuleDef::BuiltinType(it) => Some(it.as_name()),
+            ModuleDef::BuiltinType(it) => Some(it.name()),
         }
     }
 
@@ -995,6 +994,23 @@ impl HasVisibility for TypeAlias {
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct BuiltinType {
+    pub(crate) inner: hir_def::builtin_type::BuiltinType,
+}
+
+impl BuiltinType {
+    pub fn ty(self, db: &dyn HirDatabase, module: Module) -> Type {
+        let resolver = module.id.resolver(db.upcast());
+        Type::new_with_resolver(db, &resolver, Ty::builtin(self.inner))
+            .expect("crate not present in resolver")
+    }
+
+    pub fn name(self) -> Name {
+        self.inner.as_name()
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
 pub struct MacroDef {
     pub(crate) id: MacroDefId,
 }
diff --git a/crates/hir/src/from_id.rs b/crates/hir/src/from_id.rs
index c8c5fecd7..b5814da11 100644
--- a/crates/hir/src/from_id.rs
+++ b/crates/hir/src/from_id.rs
@@ -11,8 +11,9 @@ use hir_def::{
 };
 
 use crate::{
-    code_model::GenericParam, Adt, AssocItem, DefWithBody, Field, GenericDef, Label, Local,
-    MacroDef, ModuleDef, Variant, VariantDef,
+    code_model::{BuiltinType, GenericParam},
+    Adt, AssocItem, DefWithBody, Field, GenericDef, Label, Local, MacroDef, ModuleDef, Variant,
+    VariantDef,
 };
 
 macro_rules! from_id {
@@ -111,7 +112,7 @@ impl From<ModuleDefId> for ModuleDef {
             ModuleDefId::StaticId(it) => ModuleDef::Static(it.into()),
             ModuleDefId::TraitId(it) => ModuleDef::Trait(it.into()),
             ModuleDefId::TypeAliasId(it) => ModuleDef::TypeAlias(it.into()),
-            ModuleDefId::BuiltinType(it) => ModuleDef::BuiltinType(it),
+            ModuleDefId::BuiltinType(it) => ModuleDef::BuiltinType(it.into()),
         }
     }
 }
@@ -127,7 +128,7 @@ impl From<ModuleDef> for ModuleDefId {
             ModuleDef::Static(it) => ModuleDefId::StaticId(it.into()),
             ModuleDef::Trait(it) => ModuleDefId::TraitId(it.into()),
             ModuleDef::TypeAlias(it) => ModuleDefId::TypeAliasId(it.into()),
-            ModuleDef::BuiltinType(it) => ModuleDefId::BuiltinType(it),
+            ModuleDef::BuiltinType(it) => ModuleDefId::BuiltinType(it.into()),
         }
     }
 }
@@ -274,3 +275,15 @@ impl From<ModuleDef> for ItemInNs {
         }
     }
 }
+
+impl From<hir_def::builtin_type::BuiltinType> for BuiltinType {
+    fn from(inner: hir_def::builtin_type::BuiltinType) -> Self {
+        Self { inner }
+    }
+}
+
+impl From<BuiltinType> for hir_def::builtin_type::BuiltinType {
+    fn from(it: BuiltinType) -> Self {
+        it.inner
+    }
+}
diff --git a/crates/hir/src/semantics.rs b/crates/hir/src/semantics.rs
index 0a30b4f5b..59292d5a2 100644
--- a/crates/hir/src/semantics.rs
+++ b/crates/hir/src/semantics.rs
@@ -49,7 +49,7 @@ impl PathResolution {
         match self {
             PathResolution::Def(ModuleDef::Adt(adt)) => Some(TypeNs::AdtId((*adt).into())),
             PathResolution::Def(ModuleDef::BuiltinType(builtin)) => {
-                Some(TypeNs::BuiltinType(*builtin))
+                Some(TypeNs::BuiltinType((*builtin).into()))
             }
             PathResolution::Def(ModuleDef::Const(_))
             | PathResolution::Def(ModuleDef::Variant(_))
diff --git a/crates/hir/src/source_analyzer.rs b/crates/hir/src/source_analyzer.rs
index bed3fa50f..dc21f6051 100644
--- a/crates/hir/src/source_analyzer.rs
+++ b/crates/hir/src/source_analyzer.rs
@@ -28,8 +28,9 @@ use syntax::{
 };
 
 use crate::{
-    db::HirDatabase, semantics::PathResolution, Adt, Const, Field, Function, Local, MacroDef,
-    ModuleDef, Static, Struct, Trait, Type, TypeAlias, TypeParam, Variant,
+    code_model::BuiltinType, db::HirDatabase, semantics::PathResolution, Adt, Const, Field,
+    Function, Local, MacroDef, ModuleDef, Static, Struct, Trait, Type, TypeAlias, TypeParam,
+    Variant,
 };
 use base_db::CrateId;
 
@@ -479,7 +480,7 @@ fn resolve_hir_path_(
             }
             TypeNs::EnumVariantId(it) => PathResolution::Def(Variant::from(it).into()),
             TypeNs::TypeAliasId(it) => PathResolution::Def(TypeAlias::from(it).into()),
-            TypeNs::BuiltinType(it) => PathResolution::Def(it.into()),
+            TypeNs::BuiltinType(it) => PathResolution::Def(BuiltinType::from(it).into()),
             TypeNs::TraitId(it) => PathResolution::Def(Trait::from(it).into()),
         })
     };
@@ -555,7 +556,7 @@ fn resolve_hir_path_qualifier(
         TypeNs::AdtSelfType(it) | TypeNs::AdtId(it) => PathResolution::Def(Adt::from(it).into()),
         TypeNs::EnumVariantId(it) => PathResolution::Def(Variant::from(it).into()),
         TypeNs::TypeAliasId(it) => PathResolution::Def(TypeAlias::from(it).into()),
-        TypeNs::BuiltinType(it) => PathResolution::Def(it.into()),
+        TypeNs::BuiltinType(it) => PathResolution::Def(BuiltinType::from(it).into()),
         TypeNs::TraitId(it) => PathResolution::Def(Trait::from(it).into()),
     })
 }