Reuse expr_needs_parens

Author: camsteffen

compiler/rustc_trait_selection/src/error_reporting/traits/suggestions.rs

@@ -20,7 +20,7 @@ use rustc_hir::intravisit::{Visitor, VisitorExt};
 use rustc_hir::lang_items::LangItem;
 use rustc_hir::{
     self as hir, AmbigArg, CoroutineDesugaring, CoroutineKind, CoroutineSource, Expr, HirId, Node,
-    expr_needs_parens, is_range_literal,
+    expr_needs_parens,
 };
 use rustc_infer::infer::{BoundRegionConversionTime, DefineOpaqueTypes, InferCtxt, InferOk};
 use rustc_middle::middle::privacy::Level;
@@ -668,12 +668,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
                         );
                     }
                     let derefs = "*".repeat(steps);
-                    let needs_parens = steps > 0
-                        && match expr.kind {
-                            hir::ExprKind::Cast(_, _) | hir::ExprKind::Binary(_, _, _) => true,
-                            _ if is_range_literal(expr) => true,
-                            _ => false,
-                        };
+                    let needs_parens = steps > 0 && expr_needs_parens(expr);
                     let mut suggestion = if needs_parens {
                         vec![
                             (