From 7ba941d5a55213f763686ef367d72c90ad85ef78 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Fri, 10 Sep 2021 20:56:46 +0800
Subject: ...

---
 include/cru/parse/Symbol.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'include/cru/parse/Symbol.hpp')

diff --git a/include/cru/parse/Symbol.hpp b/include/cru/parse/Symbol.hpp
index 5c862c25..e22fb9bc 100644
--- a/include/cru/parse/Symbol.hpp
+++ b/include/cru/parse/Symbol.hpp
@@ -7,7 +7,7 @@ class Grammar;
 // Base class of Terminal and Nonterminal.
 class Symbol : public Object {
  public:
-  Symbol(Grammar* grammar, String name);
+  explicit Symbol(Grammar* grammar, String name);
 
   CRU_DELETE_COPY(Symbol)
   CRU_DELETE_MOVE(Symbol)
-- 
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