Rename some suggestion/note functions

We really shouldn't be naming functions `fn check_*` unless they're
doing *typechecking*. It's especially misleading when we're doing this
inside of HIR typeck.

compiler/rustc_hir_typeck/src/demand.rs

@@ -86,9 +86,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         self.emit_type_mismatch_suggestions(err, expr, expr_ty, expected, expected_ty_expr, error);
         self.note_type_is_not_clone(err, expected, expr_ty, expr);
         self.note_internal_mutation_in_method(err, expr, Some(expected), expr_ty);
-        self.check_for_range_as_method_call(err, expr, expr_ty, expected);
-        self.check_for_binding_assigned_block_without_tail_expression(err, expr, expr_ty, expected);
-        self.check_wrong_return_type_due_to_generic_arg(err, expr, expr_ty);
+        self.suggest_method_call_on_range_literal(err, expr, expr_ty, expected);
+        self.suggest_return_binding_for_missing_tail_expr(err, expr, expr_ty, expected);
+        self.note_wrong_return_ty_due_to_generic_arg(err, expr, expr_ty);
     }
 
     /// Requires that the two types unify, and prints an error message if
@@ -1217,7 +1217,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     /// In addition of this check, it also checks between references mutability state. If the
     /// expected is mutable but the provided isn't, maybe we could just say "Hey, try with
     /// `&mut`!".
-    pub fn check_ref(
+    pub fn suggest_deref_or_ref(
         &self,
         expr: &hir::Expr<'tcx>,
         checked_ty: Ty<'tcx>,
@@ -1572,7 +1572,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         None
     }
 
-    pub fn check_for_cast(
+    pub fn suggest_cast(
         &self,
         err: &mut Diagnostic,
         expr: &hir::Expr<'_>,
@@ -1939,7 +1939,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     }
 
     /// Identify when the user has written `foo..bar()` instead of `foo.bar()`.
-    pub fn check_for_range_as_method_call(
+    pub fn suggest_method_call_on_range_literal(
         &self,
         err: &mut Diagnostic,
         expr: &hir::Expr<'tcx>,
@@ -2008,7 +2008,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
     /// Identify when the type error is because `()` is found in a binding that was assigned a
     /// block without a tail expression.
-    fn check_for_binding_assigned_block_without_tail_expression(
+    fn suggest_return_binding_for_missing_tail_expr(
         &self,
         err: &mut Diagnostic,
         expr: &hir::Expr<'_>,
@@ -2050,7 +2050,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         }
     }
 
-    fn check_wrong_return_type_due_to_generic_arg(
+    fn note_wrong_return_ty_due_to_generic_arg(
         &self,
         err: &mut Diagnostic,
         expr: &hir::Expr<'_>,

compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs

@@ -275,7 +275,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     ) -> bool {
         let expr = expr.peel_blocks();
         if let Some((sp, msg, suggestion, applicability, verbose, annotation)) =
-            self.check_ref(expr, found, expected)
+            self.suggest_deref_or_ref(expr, found, expected)
         {
             if verbose {
                 err.span_suggestion_verbose(sp, msg, suggestion, applicability);
@@ -342,7 +342,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 err.span_label(sp, format!("{descr} `{name}` defined here"));
             }
             return true;
-        } else if self.check_for_cast(err, expr, found, expected, expected_ty_expr) {
+        } else if self.suggest_cast(err, expr, found, expected, expected_ty_expr) {
             return true;
         } else {
             let methods = self.get_conversion_methods(expr.span, expected, found, expr.hir_id);

compiler/rustc_hir_typeck/src/method/suggest.rs

@@ -1045,7 +1045,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             );
         }
 
-        self.check_for_inner_self(&mut err, source, rcvr_ty, item_name);
+        self.suggest_unwrapping_inner_self(&mut err, source, rcvr_ty, item_name);
 
         bound_spans.sort();
         bound_spans.dedup();
@@ -1132,7 +1132,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             }
         }
 
-        self.check_for_deref_method(&mut err, source, rcvr_ty, item_name, expected);
+        self.note_derefed_ty_has_method(&mut err, source, rcvr_ty, item_name, expected);
         return Some(err);
     }
 
@@ -1805,7 +1805,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         }
     }
 
-    fn check_for_inner_self(
+    fn suggest_unwrapping_inner_self(
         &self,
         err: &mut Diagnostic,
         source: SelfSource<'tcx>,
@@ -2175,7 +2175,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         }
     }
 
-    fn check_for_deref_method(
+    fn note_derefed_ty_has_method(
         &self,
         err: &mut Diagnostic,
         self_source: SelfSource<'tcx>,