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Diffstat (limited to 'third_party/abseil-cpp/absl/strings/internal/cord_rep_consume.h')
-rw-r--r-- | third_party/abseil-cpp/absl/strings/internal/cord_rep_consume.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_consume.h b/third_party/abseil-cpp/absl/strings/internal/cord_rep_consume.h new file mode 100644 index 0000000000..d46fca2b21 --- /dev/null +++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_consume.h @@ -0,0 +1,50 @@ +// 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_ |