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/*
* Copyright (C) 2018 The Android Open Source Project
*
* 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 LIBTEXTCLASSIFIER_UTILS_REGEX_MATCH_H_
#define LIBTEXTCLASSIFIER_UTILS_REGEX_MATCH_H_
#include "utils/optional.h"
#include "utils/utf8/unilib.h"
namespace libtextclassifier3 {
// Returns text of a capturing group if the capturing group was fulfilled in
// the regex match.
Optional<std::string> GetCapturingGroupText(const UniLib::RegexMatcher* matcher,
const int group_id);
// Post-checks a regular expression match with a lua verifier script.
// The verifier can access:
// * `context`: The context as a string.
// * `match`: The groups of the regex match as an array, each group gives
// * `begin`: span start
// * `end`: span end
// * `text`: the text
// The verifier is expected to return a boolean, indicating whether the
// verification succeeded or not.
// Returns true if the verification was successful, false if not.
bool VerifyMatch(const std::string& context,
const UniLib::RegexMatcher* matcher,
const std::string& lua_verifier_code);
} // namespace libtextclassifier3
#endif // LIBTEXTCLASSIFIER_UTILS_REGEX_MATCH_H_