51 lines
2.2 KiB
C++
51 lines
2.2 KiB
C++
// 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 {
|
|
|
|
// Functor for the Consume() and ReverseConsume() functions:
|
|
// void ConsumeFunc(CordRep* rep, size_t offset, size_t length);
|
|
// See the Consume() and ReverseConsume() function comments for documentation.
|
|
using ConsumeFn = FunctionRef<void(CordRep*, size_t, size_t)>;
|
|
|
|
// 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, ConsumeFn consume_fn);
|
|
void ReverseConsume(CordRep* rep, ConsumeFn consume_fn);
|
|
|
|
} // namespace cord_internal
|
|
ABSL_NAMESPACE_END
|
|
} // namespace absl
|
|
|
|
#endif // ABSL_STRINGS_INTERNAL_CORD_REP_CONSUME_H_
|