filter.h

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#ifndef FLUTTER_TOOLS_LICENSES_CPP_SRC_FILTER_H_
#define FLUTTER_TOOLS_LICENSES_CPP_SRC_FILTER_H_
 
#include <iosfwd>
#include <memory>
#include <string_view>
#include "flutter/third_party/re2/re2/re2.h"
#include "third_party/abseil-cpp/absl/status/statusor.h"
 
/// A filter is a concatenation of multiple regex.
///
/// This is used for things like the include.txt and exclude.txt.
class Filter {
 public:
  static absl::StatusOr<Filter> Open(std::string_view path);
 
  static absl::StatusOr<Filter> Open(std::istream& input);
 
  bool Matches(std::string_view input) const;
 
  Filter(const Filter&) = delete;
  Filter& operator=(const Filter&) = delete;
  Filter(Filter&&) = default;
  Filter& operator=(Filter&&) = default;
 
 private:
  explicit Filter(std::string_view regex);
  std::unique_ptr<RE2> re_;
};
 
#endif  // FLUTTER_TOOLS_LICENSES_CPP_SRC_FILTER_H_