folly/folly/logging/LogStream.h

/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * 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.
 */

#pragma once

#include <ostream>

#include <folly/logging/LogCategory.h>
#include <folly/logging/LogMessage.h>

namespace folly {

/**
 * A std::streambuf implementation for use by LogStream
 */
class LogStreamBuffer : public std::streambuf { … };

class LogStreamProcessor;

/**
 * A std::ostream implementation for use by the logging macros.
 *
 * All-in-all this is pretty similar to std::stringstream, but lets us
 * destructively extract an rvalue-reference to the underlying string.
 */
class LogStream : public std::ostream { … };
} // namespace folly