From 76182bd820bfe696cbde3320b0824e16f6d857ce Mon Sep 17 00:00:00 2001
From: ydah <t.yudai92@gmail.com>
Date: Tue, 1 Oct 2024 23:23:58 +0900
Subject: [PATCH] Use `string_as_id?`

---
 parser.y | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/parser.y b/parser.y
index 52603a72..1ca2be46 100644
--- a/parser.y
+++ b/parser.y
@@ -250,8 +250,7 @@ rule
               result = builder
             }
 
-  alias: # empty
-       | string_as_id { result = val[0].s_value }
+  alias: string_as_id? { result = val[0].s_value if val[0] }
 
   symbol_declarations: symbol+ { result = [{tag: nil, tokens: val[0]}] }
                      | TAG symbol+ { result = [{tag: val[0], tokens: val[1]}] }