From 799e5db96317c3884726ac8b35269d8095dd7a18 Mon Sep 17 00:00:00 2001
From: mutouyun <mark.lonr@tom.com>
Date: Wed, 23 Jan 2019 12:03:59 +0800
Subject: [PATCH] compile error

---
 include/queue.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/queue.h b/include/queue.h
index 39e7b86..d369df7 100644
--- a/include/queue.h
+++ b/include/queue.h
@@ -97,6 +97,8 @@ protected:
 public:
     using base_t::base_t;
 
+    queue_base() = default;
+
     explicit queue_base(elems_t* els, char const * name = nullptr)
         : queue_base() {
         attach(els, name);