Cpp: Adding GetSupportedRegions().

cpp/src/phonenumberutil.cc

@@ -752,6 +752,15 @@ PhoneNumberUtil* PhoneNumberUtil::GetInstance() {
   return Singleton<PhoneNumberUtil>::get();
 }
 
+void PhoneNumberUtil::GetSupportedRegions(set<string>* regions) const {
+  DCHECK(regions);
+  for (map<string, PhoneMetadata>::const_iterator it =
+       country_to_metadata_map_->begin(); it != country_to_metadata_map_->end();
+       ++it) {
+    regions->insert(it->first);
+  }
+}
+
 bool PhoneNumberUtil::IsValidRegionCode(const string& region_code) const {
   return (country_to_metadata_map_->find(region_code) !=
          country_to_metadata_map_->end());

cpp/src/phonenumberutil.h

@@ -551,6 +551,9 @@ class PhoneNumberUtil {
   explicit PhoneNumberUtil(MetadataProvider* provider = 0);
   ~PhoneNumberUtil();
 
+  // Gets all the supported regions.
+  void GetSupportedRegions(set<string>* regions) const;
+
   // Helper function to check region code is not unknown or null.
   //
   // The region_code parameter is an ISO 3166-1 two-letter country code string.

cpp/src/phonenumberutil_test.cc

@@ -16,13 +16,16 @@
 // Author: Lara Rennie
 // Open-sourced by: Philippe Liard
 
+#include <set>
+#include <string>
+
 #include <gtest/gtest.h>
 #include <re2/re2.h>
 
-#include "phonenumberutil.h"
-#include "test_metadata.h"
 #include "phonemetadata.pb.h"
 #include "phonenumber.pb.h"
+#include "phonenumberutil.h"
+#include "test_metadata.h"
 
 namespace i18n {
 namespace phonenumbers {
@@ -49,6 +52,10 @@ class PhoneNumberUtilTest : public testing::Test {
     return phone_util_.GetMetadataForRegion(region_code);
   }
 
+  void GetSupportedRegions(set<string>* regions) {
+    phone_util_.GetSupportedRegions(regions);
+  }
+
   void ExtractPossibleNumber(const string& number,
                              string* extracted_number) const {
     PhoneNumberUtil::ExtractPossibleNumber(number, extracted_number);
@@ -96,6 +103,13 @@ class PhoneNumberUtilTest : public testing::Test {
   PhoneNumberUtil phone_util_;
 };
 
+TEST_F(PhoneNumberUtilTest, GetSupportedRegions) {
+  set<string> regions;
+
+  GetSupportedRegions(&regions);
+  EXPECT_GT(regions.size(), 0);
+}
+
 TEST_F(PhoneNumberUtilTest, GetInstanceLoadUSMetadata) {
   const PhoneMetadata* metadata = GetPhoneMetadata("US");
   EXPECT_EQ("US", metadata->id());