From 37c6740c383bb9a6ee2747b04f08bc77fcfa10c5 Mon Sep 17 00:00:00 2001
From: Lei Jin <lei@fb.com>
Date: Mon, 11 Aug 2014 15:04:41 -0700
Subject: [PATCH] make statistics ToString function empty instead of pure
 virtual

Summary: as title

Test Plan: make release

Reviewers: yhchiang, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D21549
---
 include/rocksdb/statistics.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/rocksdb/statistics.h b/include/rocksdb/statistics.h
index f5912721230..4b17e481eca 100644
--- a/include/rocksdb/statistics.h
+++ b/include/rocksdb/statistics.h
@@ -265,7 +265,10 @@ class Statistics {
   virtual void measureTime(uint32_t histogramType, uint64_t time) = 0;
 
   // String representation of the statistic object.
-  virtual std::string ToString() const = 0;
+  virtual std::string ToString() const {
+    // Do nothing by default
+    return std::string("ToString(): not implemented");
+  }
 
   // Override this function to disable particular histogram collection
   virtual bool HistEnabledForType(uint32_t type) const {