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// Copyright 2021 gRPC 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.
#ifndef GRPC_SRC_CORE_LIB_PROMISE_DETAIL_STATUS_H
#define GRPC_SRC_CORE_LIB_PROMISE_DETAIL_STATUS_H
#include <grpc/support/port_platform.h>
#include <utility>
#include "y_absl/status/status.h"
#include "y_absl/status/statusor.h"
// Helpers for dealing with y_absl::Status/StatusOr generically
namespace grpc_core {
namespace promise_detail {
// Convert with a move the input status to an y_absl::Status.
template <typename T>
y_absl::Status IntoStatus(y_absl::StatusOr<T>* status) {
return std::move(status->status());
}
// Convert with a move the input status to an y_absl::Status.
inline y_absl::Status IntoStatus(y_absl::Status* status) {
return std::move(*status);
}
} // namespace promise_detail
// Return true if the status represented by the argument is ok, false if not.
// By implementing this function for other, non-y_absl::Status types, those types
// can participate in TrySeq as result types that affect control flow.
inline bool IsStatusOk(const y_absl::Status& status) { return status.ok(); }
template <typename To, typename From>
struct StatusCastImpl;
template <typename To>
struct StatusCastImpl<To, To> {
static To Cast(To&& t) { return std::move(t); }
};
template <typename To>
struct StatusCastImpl<To, const To&> {
static To Cast(const To& t) { return t; }
};
template <typename T>
struct StatusCastImpl<y_absl::StatusOr<T>, y_absl::Status> {
static y_absl::StatusOr<T> Cast(y_absl::Status&& t) { return std::move(t); }
};
template <typename T>
struct StatusCastImpl<y_absl::StatusOr<T>, const y_absl::Status&> {
static y_absl::StatusOr<T> Cast(const y_absl::Status& t) { return t; }
};
template <typename To, typename From>
To StatusCast(From&& from) {
return StatusCastImpl<To, From>::Cast(std::forward<From>(from));
}
} // namespace grpc_core
#endif // GRPC_SRC_CORE_LIB_PROMISE_DETAIL_STATUS_H
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