rustc: collapse relevant DefPathData variants into TypeNs.

[rust.git] / src / librustc / ty / util.rs

diff --git a/src/librustc/ty/util.rs b/src/librustc/ty/util.rs
index 2db2ef59a6ba052fa84b38f85077236dd25ffd6e..4c8ed71a57ca6181298d618847d6fa36e7c27ed2 100644 (file)
--- a/src/librustc/ty/util.rs
+++ b/src/librustc/ty/util.rs
@@ -1,6 +1,7 @@
 //! Miscellaneous type-system utilities that are too small to deserve their own modules.
 
 use crate::hir;
+use crate::hir::def::DefKind;
 use crate::hir::def_id::DefId;
 use crate::hir::map::DefPathData;
 use crate::mir::interpret::{sign_extend, truncate};
@@ -529,21 +530,13 @@ pub fn is_closure(self, def_id: DefId) -> bool {
 
     /// Returns `true` if `def_id` refers to a trait (i.e., `trait Foo { ... }`).
     pub fn is_trait(self, def_id: DefId) -> bool {
-        if let DefPathData::Trait(_) = self.def_key(def_id).disambiguated_data.data {
-            true
-        } else {
-            false
-        }
+        self.def_kind(def_id) == Some(DefKind::Trait)
     }
 
     /// Returns `true` if `def_id` refers to a trait alias (i.e., `trait Foo = ...;`),
     /// and `false` otherwise.
     pub fn is_trait_alias(self, def_id: DefId) -> bool {
-        if let DefPathData::TraitAlias(_) = self.def_key(def_id).disambiguated_data.data {
-            true
-        } else {
-            false
-        }
+        self.def_kind(def_id) == Some(DefKind::TraitAlias)
     }
 
     /// Returns `true` if this `DefId` refers to the implicit constructor for
@@ -601,7 +594,7 @@ pub fn closure_env_ty(self,
     pub fn empty_substs_for_def_id(self, item_def_id: DefId) -> SubstsRef<'tcx> {
         InternalSubsts::for_item(self, item_def_id, |param, _| {
             match param.kind {
-                GenericParamDefKind::Lifetime => self.types.re_erased.into(),
+                GenericParamDefKind::Lifetime => self.lifetimes.re_erased.into(),
                 GenericParamDefKind::Type { .. } => {
                     bug!("empty_substs_for_def_id: {:?} has type parameters", item_def_id)
                 }