chromium/third_party/libphonenumber/dist/cpp/src/phonenumbers/regexp_adapter.h

// Copyright (C) 2011 The Libphonenumber Authors
//
// 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: George Yakovlev
//         Philippe Liard
//
// RegExp adapter to allow a pluggable regexp engine. It has been introduced
// during the integration of the open-source version of this library into
// Chromium to be able to use the ICU Regex engine instead of RE2, which is not
// officially supported on Windows.
// Since RE2 was initially used in this library, the interface of this adapter
// is very close to the subset of the RE2 API used in phonenumberutil.cc.

#ifndef I18N_PHONENUMBERS_REGEXP_ADAPTER_H_
#define I18N_PHONENUMBERS_REGEXP_ADAPTER_H_

#include <cstddef>
#include <string>

namespace i18n {
namespace phonenumbers {

string;

// RegExpInput is the interface that abstracts the input that feeds the
// Consume() method of RegExp which may differ depending on its various
// implementations (StringPiece for RE2, UnicodeString for ICU Regex).
class RegExpInput { … };

// The regular expression abstract class. It supports only functions used in
// phonenumberutil.cc. Consume(), Match() and Replace() methods must be
// implemented.
class RegExp { … };

// Abstract factory class that lets its subclasses instantiate the classes
// implementing RegExp and RegExpInput.
class AbstractRegExpFactory { … };

}  // namespace phonenumbers
}  // namespace i18n

#endif  // I18N_PHONENUMBERS_REGEXP_ADAPTER_H_