mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-29 00:34:03 +00:00
76c834e441
Summary:
... to follow modern C++ style / idioms.
Used this hack:
```
for FILE in `cat my_list_of_files`; do perl -pi -e 'BEGIN{undef $/;} s/ virtual( [^;{]* override)/$1/smg' $FILE; done
```
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12319
Test Plan: existing tests, CI
Reviewed By: jaykorean
Differential Revision: D53275303
Pulled By: pdillinger
fbshipit-source-id: bc0881af270aa8ef4d0ae4f44c5a6614b6407377
33 lines
1.1 KiB
C++
33 lines
1.1 KiB
C++
// Copyright (c) Meta Platforms, Inc. and affiliates.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// A MergeOperator for rocksdb that implements string append.
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#pragma once
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#include "rocksdb/merge_operator.h"
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#include "rocksdb/slice.h"
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namespace ROCKSDB_NAMESPACE {
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class StringAppendOperator : public AssociativeMergeOperator {
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public:
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// Constructor: specify delimiter
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explicit StringAppendOperator(char delim_char);
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explicit StringAppendOperator(const std::string& delim);
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bool Merge(const Slice& key, const Slice* existing_value, const Slice& value,
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std::string* new_value, Logger* logger) const override;
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static const char* kClassName() { return "StringAppendOperator"; }
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static const char* kNickName() { return "stringappend"; }
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const char* Name() const override { return kClassName(); }
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const char* NickName() const override { return kNickName(); }
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private:
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std::string delim_; // The delimiter is inserted between elements
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};
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} // namespace ROCKSDB_NAMESPACE
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