From 67f1a08fd8eff669a997950cac6c538dd96718b3 Mon Sep 17 00:00:00 2001
From: Florian Diebold <flodiebold@gmail.com>
Date: Fri, 21 May 2021 18:20:56 +0200
Subject: Some remaining cleanups

---
 crates/hir_ty/src/infer.rs        |  4 ----
 crates/hir_ty/src/infer/coerce.rs | 20 ++++++++++----------
 crates/hir_ty/src/infer/unify.rs  |  7 +++----
 3 files changed, 13 insertions(+), 18 deletions(-)

(limited to 'crates')

diff --git a/crates/hir_ty/src/infer.rs b/crates/hir_ty/src/infer.rs
index a137c0f92..f1cebbdb9 100644
--- a/crates/hir_ty/src/infer.rs
+++ b/crates/hir_ty/src/infer.rs
@@ -373,10 +373,6 @@ impl<'a> InferenceContext<'a> {
         self.table.unify(ty1, ty2)
     }
 
-    fn unify_inner(&mut self, ty1: &Ty, ty2: &Ty) -> InferResult {
-        self.table.unify_inner(ty1, ty2)
-    }
-
     fn resolve_ty_shallow(&mut self, ty: &Ty) -> Ty {
         self.resolve_obligations_as_possible();
         self.table.resolve_ty_shallow(ty)
diff --git a/crates/hir_ty/src/infer/coerce.rs b/crates/hir_ty/src/infer/coerce.rs
index 40b4db926..765a02b1c 100644
--- a/crates/hir_ty/src/infer/coerce.rs
+++ b/crates/hir_ty/src/infer/coerce.rs
@@ -146,7 +146,7 @@ impl<'a> InferenceContext<'a> {
             }
             _ => {
                 // Otherwise, just use unification rules.
-                self.unify_inner(&from_ty, to_ty)
+                self.table.try_unify(&from_ty, to_ty)
             }
         }
     }
@@ -155,7 +155,7 @@ impl<'a> InferenceContext<'a> {
         let (_is_ref, from_mt, from_inner) = match from_ty.kind(&Interner) {
             TyKind::Ref(mt, _, ty) => (true, mt, ty),
             TyKind::Raw(mt, ty) => (false, mt, ty),
-            _ => return self.unify_inner(&from_ty, to_ty),
+            _ => return self.table.try_unify(&from_ty, to_ty),
         };
 
         coerce_mutabilities(*from_mt, to_mt)?;
@@ -163,7 +163,7 @@ impl<'a> InferenceContext<'a> {
         // Check that the types which they point at are compatible.
         let from_raw = TyKind::Raw(to_mt, from_inner.clone()).intern(&Interner);
         // FIXME: behavior differs based on is_ref once we're computing adjustments
-        self.unify_inner(&from_raw, to_ty)
+        self.table.try_unify(&from_raw, to_ty)
     }
 
     /// Reborrows `&mut A` to `&mut B` and `&(mut) A` to `&B`.
@@ -174,7 +174,7 @@ impl<'a> InferenceContext<'a> {
             TyKind::Ref(mt, _, _) => {
                 coerce_mutabilities(*mt, to_mt)?;
             }
-            _ => return self.unify_inner(&from_ty, to_ty),
+            _ => return self.table.try_unify(&from_ty, to_ty),
         };
 
         // NOTE: this code is mostly copied and adapted from rustc, and
@@ -228,7 +228,7 @@ impl<'a> InferenceContext<'a> {
             // from `&mut T` to `&U`.
             let lt = static_lifetime(); // FIXME: handle lifetimes correctly, see rustc
             let derefd_from_ty = TyKind::Ref(to_mt, lt, referent_ty).intern(&Interner);
-            match self.unify_inner(&derefd_from_ty, to_ty) {
+            match self.table.try_unify(&derefd_from_ty, to_ty) {
                 Ok(result) => {
                     found = Some(result);
                     break;
@@ -274,7 +274,7 @@ impl<'a> InferenceContext<'a> {
 
                 Ok(ok)
             }
-            _ => self.unify_inner(&from_ty, to_ty),
+            _ => self.table.try_unify(&from_ty, to_ty),
         }
     }
 
@@ -299,10 +299,10 @@ impl<'a> InferenceContext<'a> {
             {
                 let from_unsafe =
                     TyKind::Function(safe_to_unsafe_fn_ty(from_fn_ptr.clone())).intern(&Interner);
-                return self.unify_inner(&from_unsafe, to_ty);
+                return self.table.try_unify(&from_unsafe, to_ty);
             }
         }
-        self.unify_inner(&from_ty, to_ty)
+        self.table.try_unify(&from_ty, to_ty)
     }
 
     /// Attempts to coerce from the type of a non-capturing closure into a
@@ -323,9 +323,9 @@ impl<'a> InferenceContext<'a> {
                 //     `unsafe fn(arg0,arg1,...) -> _`
                 let safety = fn_ty.sig.safety;
                 let pointer_ty = coerce_closure_fn_ty(from_substs, safety);
-                self.unify_inner(&pointer_ty, to_ty)
+                self.table.try_unify(&pointer_ty, to_ty)
             }
-            _ => self.unify_inner(&from_ty, to_ty),
+            _ => self.table.try_unify(&from_ty, to_ty),
         }
     }
 
diff --git a/crates/hir_ty/src/infer/unify.rs b/crates/hir_ty/src/infer/unify.rs
index 8674c1b0c..4987795e0 100644
--- a/crates/hir_ty/src/infer/unify.rs
+++ b/crates/hir_ty/src/infer/unify.rs
@@ -70,7 +70,7 @@ impl<T: HasInterner<Interner = Interner>> Canonicalized<T> {
                 let ty = ctx.normalize_associated_types_in(new_vars.apply(ty.clone(), &Interner));
                 ctx.unify(var.assert_ty_ref(&Interner), &ty);
             } else {
-                let _ = ctx.unify_inner(&var, &new_vars.apply(v.clone(), &Interner));
+                let _ = ctx.try_unify(&var, &new_vars.apply(v.clone(), &Interner));
             }
         }
     }
@@ -300,9 +300,8 @@ impl<'a> InferenceTable<'a> {
     }
 
     /// Unify two types and register new trait goals that arise from that.
-    // TODO give these two functions better names
     pub(crate) fn unify(&mut self, ty1: &Ty, ty2: &Ty) -> bool {
-        let result = if let Ok(r) = self.unify_inner(ty1, ty2) {
+        let result = if let Ok(r) = self.try_unify(ty1, ty2) {
             r
         } else {
             return false;
@@ -313,7 +312,7 @@ impl<'a> InferenceTable<'a> {
 
     /// Unify two types and return new trait goals arising from it, so the
     /// caller needs to deal with them.
-    pub(crate) fn unify_inner<T: Zip<Interner>>(&mut self, t1: &T, t2: &T) -> InferResult {
+    pub(crate) fn try_unify<T: Zip<Interner>>(&mut self, t1: &T, t2: &T) -> InferResult {
         match self.var_unification_table.relate(
             &Interner,
             &self.db,
-- 
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