Combine Eq and Sub

compiler/rustc_infer/src/infer/relate/combine.rs

@@ -22,10 +22,9 @@
 //! [TypeRelation::a_is_expected], so when dealing with contravariance
 //! this should be correctly updated.
 
-use super::equate::Equate;
 use super::glb::Glb;
 use super::lub::Lub;
-use super::sub::Sub;
+use super::type_relating::TypeRelating;
 use crate::infer::{DefineOpaqueTypes, InferCtxt, TypeTrace};
 use crate::traits::{Obligation, PredicateObligations};
 use rustc_middle::infer::canonical::OriginalQueryValues;
@@ -34,7 +33,6 @@ use rustc_middle::ty::error::{ExpectedFound, TypeError};
 use rustc_middle::ty::relate::{RelateResult, TypeRelation};
 use rustc_middle::ty::{self, InferConst, ToPredicate, Ty, TyCtxt, TypeVisitableExt};
 use rustc_middle::ty::{IntType, UintType};
-use rustc_middle::ty::{RelationDirection, TyVar};
 use rustc_span::Span;
 
 #[derive(Clone)]
@@ -304,12 +302,12 @@ impl<'infcx, 'tcx> CombineFields<'infcx, 'tcx> {
         self.infcx.tcx
     }
 
-    pub fn equate<'a>(&'a mut self, a_is_expected: bool) -> Equate<'a, 'infcx, 'tcx> {
-        Equate::new(self, a_is_expected)
+    pub fn equate<'a>(&'a mut self, a_is_expected: bool) -> TypeRelating<'a, 'infcx, 'tcx> {
+        TypeRelating::new(self, a_is_expected, ty::RelationDirection::Equate)
     }
 
-    pub fn sub<'a>(&'a mut self, a_is_expected: bool) -> Sub<'a, 'infcx, 'tcx> {
-        Sub::new(self, a_is_expected)
+    pub fn sub<'a>(&'a mut self, a_is_expected: bool) -> TypeRelating<'a, 'infcx, 'tcx> {
+        TypeRelating::new(self, a_is_expected, ty::RelationDirection::Subtype)
     }
 
     pub fn lub<'a>(&'a mut self, a_is_expected: bool) -> Lub<'a, 'infcx, 'tcx> {

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

@@ -2,10 +2,10 @@
 //! (except for some relations used for diagnostics and heuristics in the compiler).
 
 pub(super) mod combine;
-mod equate;
 mod generalize;
 mod glb;
 mod higher_ranked;
 mod lattice;
 mod lub;
-mod sub;
+pub mod nll;
+mod type_relating;