chromium/third_party/grpc/src/src/core/lib/promise/interceptor_list.h

// Copyright 2022 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_INTERCEPTOR_LIST_H
#define GRPC_SRC_CORE_LIB_PROMISE_INTERCEPTOR_LIST_H

#include <grpc/support/port_platform.h>

#include <stddef.h>

#include <algorithm>
#include <new>
#include <string>
#include <utility>

#include "absl/strings/str_cat.h"
#include "absl/strings/str_format.h"
#include "absl/types/optional.h"

#include <grpc/support/log.h>

#include "src/core/lib/debug/trace.h"
#include "src/core/lib/gprpp/construct_destruct.h"
#include "src/core/lib/gprpp/debug_location.h"
#include "src/core/lib/promise/context.h"
#include "src/core/lib/promise/detail/promise_factory.h"
#include "src/core/lib/promise/poll.h"
#include "src/core/lib/promise/trace.h"
#include "src/core/lib/resource_quota/arena.h"

namespace grpc_core {

// Tracks a list of maps of T -> optional<T> via promises.
// When Run, runs each transformation in order, and resolves to the ulimate
// result.
// If a map resolves to nullopt, the chain is terminated and the result is
// nullopt.
// Maps can also have synchronous cleanup functions, which are guaranteed to be
// called at the termination of each run through the chain.
template <typename T>
class InterceptorList { … };

}  // namespace grpc_core

#endif  // GRPC_SRC_CORE_LIB_PROMISE_INTERCEPTOR_LIST_H