Re-committing http://codereview.chromium.org/8736001/ originally committed revision=112305

third_party/libphonenumber/cpp/src/regexp_cache.h

Index: third_party/libphonenumber/cpp/src/regexp_cache.h
===================================================================
--- third_party/libphonenumber/cpp/src/regexp_cache.h	(revision 112797)
+++ third_party/libphonenumber/cpp/src/regexp_cache.h	(working copy)
@@ -1,76 +0,0 @@
-// Copyright (C) 2011 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Author: Fredrik Roubert
-
-// RegExpCache is a simple wrapper around hash_map<> to store RegExp objects.
-//
-// To get a cached RegExp object for a regexp pattern string, call the
-// GetRegExp() method of the class RegExpCache providing the pattern string. If
-// a RegExp object corresponding to the pattern string doesn't already exist, it
-// will be created by the GetRegExp() method.
-//
-// RegExpCache cache;
-// const RegExp& regexp = cache.GetRegExp("\d");
-
-#ifndef I18N_PHONENUMBERS_REGEXP_CACHE_H_
-#define I18N_PHONENUMBERS_REGEXP_CACHE_H_
-
-#include <cstddef>
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/synchronization/lock.h"
-
-#ifdef USE_TR1_UNORDERED_MAP
-#  include <tr1/unordered_map>
-#elif defined(USE_HASH_MAP)
-#  include "base/hash_tables.h"
-#else
-#  error STL map type unsupported on this platform!
-#endif
-
-namespace i18n {
-namespace phonenumbers {
-
-using std::string;
-
-class RegExp;
-
-class RegExpCache {
- private:
-#ifdef USE_TR1_UNORDERED_MAP
-  typedef std::tr1::unordered_map<string, const RegExp*> CacheImpl;
-#elif defined(USE_HASH_MAP)
-  typedef base::hash_map<string, const RegExp*> CacheImpl;
-#endif
-
- public:
-  explicit RegExpCache(size_t min_items);
-  ~RegExpCache();
-
-  const RegExp& GetRegExp(const string& pattern);
-
- private:
-  base::Lock lock_;  // protects cache_impl_
-  scoped_ptr<CacheImpl> cache_impl_;  // protected by lock_
-  friend class RegExpCacheTest_CacheConstructor_Test;
-  DISALLOW_COPY_AND_ASSIGN(RegExpCache);
-};
-
-}  // namespace phonenumbers
-}  // namespace i18n
-
-#endif  // I18N_PHONENUMBERS_REGEXP_CACHE_H_