cord_rep_consume.h

Enable keyboard shortcuts

// Copyright 2021 The Abseil 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

//

//     https://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 ABSL_STRINGS_INTERNAL_CORD_REP_CONSUME_H_

#define ABSL_STRINGS_INTERNAL_CORD_REP_CONSUME_H_

#include <functional>

#include "absl/functional/function_ref.h"

#include "absl/strings/internal/cord_internal.h"

namespace absl {

ABSL_NAMESPACE_BEGIN

namespace cord_internal {

// Consume() and ReverseConsume() consume CONCAT based trees and invoke the

// provided functor with the contained nodes in the proper forward or reverse

// order, which is used to convert CONCAT trees into other tree or cord data.

// All CONCAT and SUBSTRING nodes are processed internally. The 'offset`

// parameter of the functor is non-zero for any nodes below SUBSTRING nodes.

// It's up to the caller to form these back into SUBSTRING nodes or otherwise

// store offset / prefix information. These functions are intended to be used

// only for migration / transitional code where due to factors such as ODR

// violations, we can not 100% guarantee that all code respects 'new format'

// settings and flags, so we need to be able to parse old data on the fly until

// all old code is deprecated / no longer the default format.

void Consume(CordRep* rep,

             FunctionRef<void(CordRep*, size_t, size_t)> consume_fn);

void ReverseConsume(CordRep* rep,

                    FunctionRef<void(CordRep*, size_t, size_t)> consume_fn);

}  // namespace cord_internal

ABSL_NAMESPACE_END

}  // namespace absl

#endif  // ABSL_STRINGS_INTERNAL_CORD_REP_CONSUME_H_