From 69642000dc3a83b3dad5a33052da1eff1f450b6d Mon Sep 17 00:00:00 2001
From: minqiyang <minqiyang@baidu.com>
Date: Tue, 18 Dec 2018 15:09:01 +0800
Subject: [PATCH] Hide KeyHasher

test=develop
---
 paddle/fluid/framework/scope.h | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/paddle/fluid/framework/scope.h b/paddle/fluid/framework/scope.h
index 9a715ac9b95..797d1101593 100644
--- a/paddle/fluid/framework/scope.h
+++ b/paddle/fluid/framework/scope.h
@@ -38,14 +38,6 @@ bool IsFastEagerDeletionModeEnabled();
 
 class Scope;
 
-namespace inner {
-struct KeyHasher {
-  std::size_t operator()(const std::string& key) const {
-    return XXH32(key.c_str(), key.size(), 1);
-  }
-};
-}  // namespace inner
-
 /**
  * @brief Scope that manage all variables.
  *
@@ -110,8 +102,13 @@ class Scope {
   std::string Rename(const std::string& origin_name) const;
 
  protected:
-  mutable std::unordered_map<std::string, std::unique_ptr<Variable>,
-                             inner::KeyHasher>
+  struct KeyHasher {
+    std::size_t operator()(const std::string& key) const {
+      return XXH32(key.c_str(), key.size(), 1);
+    }
+  };
+
+  mutable std::unordered_map<std::string, std::unique_ptr<Variable>, KeyHasher>
       vars_;
 
  private:
-- 
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