From 778a1a9f8780405a32814d3f95accccb4304dc87 Mon Sep 17 00:00:00 2001
From: fengjiayi <fengjiayi@baidu.com>
Date: Mon, 17 Jul 2017 12:03:46 +0800
Subject: [PATCH] add a comment for

---
 paddle/framework/ddim.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/paddle/framework/ddim.h b/paddle/framework/ddim.h
index 675f8680f6..df26d73d48 100644
--- a/paddle/framework/ddim.h
+++ b/paddle/framework/ddim.h
@@ -81,6 +81,13 @@ std::vector<int> vectorize(const DDim& ddim);
 
 ssize_t product(const DDim& ddim);
 
+/**
+ * \brief Slice a ddim
+ *
+ * Slice dim with [begin, end).
+ * e.g.  DDim d = make_ddim({1,2,3,4,5});
+ *       slice_ddim(d, 1, 3); ====> {2,3}
+ */
 DDim slice_ddim(const DDim& dim, int begin, int end);
 
 /**
-- 
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