CPP: Internal function rename (CompareFirst -> OrderByFirst).

cpp/src/phonenumberutil.cc

@@ -39,6 +39,7 @@
 #include "phonenumber.pb.h"
 #include "regexp_adapter.h"
 #include "regexp_cache.h"
+#include "stl_util.h"
 #include "stringutil.h"
 #include "utf/unicodetext.h"
 #include "utf/utf.h"
@@ -709,7 +710,7 @@ PhoneNumberUtil::PhoneNumberUtil()
   // Sort all the pairs in ascending order according to country calling code.
   sort(country_calling_code_to_region_code_map_->begin(),
        country_calling_code_to_region_code_map_->end(),
-       CompareFirst());
+       OrderByFirst());
 
   InitializeStaticMapsAndSets();
 }
@@ -1200,7 +1201,7 @@ void PhoneNumberUtil::GetRegionCodesForCountryCallingCode(
   pair<ConstIterator, ConstIterator> range = equal_range(
       country_calling_code_to_region_code_map_->begin(),
       country_calling_code_to_region_code_map_->end(),
-      target_pair, CompareFirst());
+      target_pair, OrderByFirst());
   if (range.first != range.second) {
     region_codes->insert(region_codes->begin(),
                          range.first->second->begin(),

cpp/src/phonenumberutil.h

@@ -521,13 +521,6 @@ class PhoneNumberUtil : public Singleton<PhoneNumberUtil> {
   // achieve better performance.
   scoped_ptr<vector<IntRegionsPair> > country_calling_code_to_region_code_map_;
 
-  struct CompareFirst {
-    bool operator()(const IntRegionsPair& p1,
-                    const IntRegionsPair& p2) const {
-      return p1.first < p2.first;
-    }
-  };
-
   // The set of regions that share country calling code 1.
   scoped_ptr<set<string> > nanpa_regions_;
   static const int kNanpaCountryCode = 1;

cpp/src/stl_util.h

@@ -0,0 +1,32 @@
+// 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.
+
+#ifndef I18N_PHONENUMBERS_STL_UTIL_H_
+#define I18N_PHONENUMBERS_STL_UTIL_H_
+
+namespace i18n {
+namespace phonenumbers {
+
+// Compares the first attribute of two pairs.
+struct OrderByFirst {
+  template <typename T>
+  bool operator()(const T& p1, const T& p2) const {
+    return p1.first < p2.first;
+  }
+};
+
+}  // namespace phonenumbers
+}  // namespace i18n
+
+#endif  // I18N_PHONENUMBERS_STL_UTIL_H_