From 568c03ba1d311ac2af2cb9242cefb00537174e50 Mon Sep 17 00:00:00 2001
From: Superjom <superjom@gmail.com>
Date: Wed, 5 Jul 2017 10:51:47 +0800
Subject: [PATCH] add virtual implementation

---
 paddle/framework/net.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/paddle/framework/net.h b/paddle/framework/net.h
index e60356dc172..2025bfa4b23 100644
--- a/paddle/framework/net.h
+++ b/paddle/framework/net.h
@@ -91,6 +91,8 @@ class Net {
    * @brief Create a network.
    */
   static std::unique_ptr<Net> Create(const NetDesc &def = NetDesc());
+
+  virtual ~Net() {}
 };
 
 /**
@@ -140,6 +142,8 @@ class PlainNet : public Net {
    */
   virtual void AddBackwardOps() override;
 
+  virtual ~PlainNet() override {}
+
  protected:
   /**
    * @brief Build the network.
-- 
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