Use Default more in InferCtxtInner.

Author: nnethercote

compiler/rustc_infer/src/infer/mod.rs

@@ -172,12 +172,12 @@ impl<'tcx> InferCtxtInner<'tcx> {
             undo_log: InferCtxtUndoLogs::default(),
 
             projection_cache: Default::default(),
-            type_variable_storage: type_variable::TypeVariableStorage::new(),
-            const_unification_storage: ut::UnificationTableStorage::new(),
-            int_unification_storage: ut::UnificationTableStorage::new(),
-            float_unification_storage: ut::UnificationTableStorage::new(),
-            effect_unification_storage: ut::UnificationTableStorage::new(),
-            region_constraint_storage: Some(RegionConstraintStorage::new()),
+            type_variable_storage: Default::default(),
+            const_unification_storage: Default::default(),
+            int_unification_storage: Default::default(),
+            float_unification_storage: Default::default(),
+            effect_unification_storage: Default::default(),
+            region_constraint_storage: Some(Default::default()),
             region_obligations: vec![],
             opaque_type_storage: Default::default(),
         }

compiler/rustc_infer/src/infer/region_constraints/mod.rs

@@ -294,10 +294,6 @@ pub(crate) struct RegionSnapshot {
 }
 
 impl<'tcx> RegionConstraintStorage<'tcx> {
-    pub fn new() -> Self {
-        Self::default()
-    }
-
     #[inline]
     pub(crate) fn with_log<'a>(
         &'a mut self,

compiler/rustc_infer/src/infer/type_variable.rs

@@ -19,7 +19,7 @@ impl<'tcx> Rollback<sv::UndoLog<ut::Delegate<TyVidEqKey<'tcx>>>> for TypeVariabl
     }
 }
 
-#[derive(Clone)]
+#[derive(Clone, Default)]
 pub(crate) struct TypeVariableStorage<'tcx> {
     /// The origins of each type variable.
     values: IndexVec<TyVid, TypeVariableData>,
@@ -74,13 +74,6 @@ impl<'tcx> TypeVariableValue<'tcx> {
 }
 
 impl<'tcx> TypeVariableStorage<'tcx> {
-    pub(crate) fn new() -> TypeVariableStorage<'tcx> {
-        TypeVariableStorage {
-            values: Default::default(),
-            eq_relations: ut::UnificationTableStorage::new(),
-        }
-    }
-
     #[inline]
     pub(crate) fn with_log<'a>(
         &'a mut self,