|  | /* | 
|  | *  Copyright 2018 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_FIELD_TRIAL_UNITS_H_ | 
|  | #define RTC_BASE_EXPERIMENTS_FIELD_TRIAL_UNITS_H_ | 
|  |  | 
|  | #include "absl/strings/string_view.h" | 
|  | #include "api/units/data_rate.h" | 
|  | #include "api/units/data_size.h" | 
|  | #include "api/units/time_delta.h" | 
|  | #include "rtc_base/experiments/field_trial_parser.h" | 
|  |  | 
|  | namespace webrtc { | 
|  |  | 
|  | template <> | 
|  | std::optional<DataRate> ParseTypedParameter<DataRate>(absl::string_view str); | 
|  | template <> | 
|  | std::optional<DataSize> ParseTypedParameter<DataSize>(absl::string_view str); | 
|  | template <> | 
|  | std::optional<TimeDelta> ParseTypedParameter<TimeDelta>(absl::string_view str); | 
|  |  | 
|  | extern template class FieldTrialParameter<DataRate>; | 
|  | extern template class FieldTrialParameter<DataSize>; | 
|  | extern template class FieldTrialParameter<TimeDelta>; | 
|  |  | 
|  | extern template class FieldTrialConstrained<DataRate>; | 
|  | extern template class FieldTrialConstrained<DataSize>; | 
|  | extern template class FieldTrialConstrained<TimeDelta>; | 
|  |  | 
|  | extern template class FieldTrialOptional<DataRate>; | 
|  | extern template class FieldTrialOptional<DataSize>; | 
|  | extern template class FieldTrialOptional<TimeDelta>; | 
|  | }  // namespace webrtc | 
|  |  | 
|  | #endif  // RTC_BASE_EXPERIMENTS_FIELD_TRIAL_UNITS_H_ |