chromium/third_party/webrtc/rtc_base/experiments/struct_parameters_parser.h

/*
 *  Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */
#ifndef RTC_BASE_EXPERIMENTS_STRUCT_PARAMETERS_PARSER_H_
#define RTC_BASE_EXPERIMENTS_STRUCT_PARAMETERS_PARSER_H_

#include <functional>
#include <map>
#include <memory>
#include <string>
#include <utility>
#include <vector>

#include "absl/memory/memory.h"
#include "absl/strings/string_view.h"
#include "absl/types/optional.h"
#include "rtc_base/experiments/field_trial_parser.h"
#include "rtc_base/experiments/field_trial_units.h"
#include "rtc_base/string_encode.h"

namespace webrtc {
namespace struct_parser_impl {
struct TypedMemberParser { … };

struct MemberParameter { … };

template <typename T>
class TypedParser { … };

// Instantiated in cc file to avoid duplication during compile. Add additional
// parsers as needed. Generally, try to use these suggested types even if the
// context where the value is used might require a different type. For instance,
// a size_t representing a packet size should use an int parameter as there's no
// need to support packet sizes larger than INT32_MAX.
extern template class TypedParser<bool>;
extern template class TypedParser<double>;
extern template class TypedParser<int>;
extern template class TypedParser<unsigned>;
extern template class TypedParser<absl::optional<double>>;
extern template class TypedParser<absl::optional<int>>;
extern template class TypedParser<absl::optional<unsigned>>;

extern template class TypedParser<DataRate>;
extern template class TypedParser<DataSize>;
extern template class TypedParser<TimeDelta>;
extern template class TypedParser<absl::optional<DataRate>>;
extern template class TypedParser<absl::optional<DataSize>>;
extern template class TypedParser<absl::optional<TimeDelta>>;

template <typename T>
void AddMembers(MemberParameter* out, const char* key, T* member) { … }

template <typename T, typename... Args>
void AddMembers(MemberParameter* out,
                const char* key,
                T* member,
                Args... args) { … }
}  // namespace struct_parser_impl

class StructParametersParser { … };

}  // namespace webrtc

#endif  // RTC_BASE_EXPERIMENTS_STRUCT_PARAMETERS_PARSER_H_