Try to tell if two vectors are the same

Author: HarrisonMc555

clippy_lints/src/use_last.rs

@@ -86,11 +86,13 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UseLast {
              // let _ = println!("LHS of sub is a method call");
             if arg_lhs_path.ident.name == "len";
             // let _ = println!("LHS of sub was method named len");
-            if let Some(_arg_lhs_struct) = lhs_args.get(0);
+            if let Some(arg_lhs_struct) = lhs_args.get(0);
             // let _ = println!("LHS of sub method has an arg");
 
             // TODO: Is this a valid way to check if they reference the same vector?
-            // if arg_lhs_struct.hir_id == struct_calling_on.hir_id;
+            if let ExprKind::Path(arg_lhs_struct_path) = arg_lhs_struct.node;
+            if let ExprKind::Path(struct_calling_on_path) = struct_calling_on.nod
+            if arg_lhs_struct_path == struct_calling_on_path;
             // let _ = println!("The vector in .get and .len were the same");
 
             // RHS of subtraction is 1