6f4e3ee3e8
Summary: added "#pragma once" in the .h files Test Plan: make and run: stringappend_test, redis_test Reviewers: emayanke, haobo Reviewed By: emayanke CC: leveldb Differential Revision: https://reviews.facebook.net/D12495
33 lines
784 B
C++
33 lines
784 B
C++
/**
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* A MergeOperator for rocksdb/leveldb that implements string append.
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* @author Deon Nicholas (dnicholas@fb.com)
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* Copyright 2013 Facebook
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*/
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#pragma once
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#include "leveldb/merge_operator.h"
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#include "leveldb/slice.h"
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namespace leveldb {
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class StringAppendOperator : public AssociativeMergeOperator {
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public:
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StringAppendOperator(char delim_char); /// Constructor: specify delimiter
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virtual bool Merge(const Slice& key,
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const Slice* existing_value,
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const Slice& value,
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std::string* new_value,
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Logger* logger) const override;
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virtual const char* Name() const override;
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private:
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char delim_; // The delimiter is inserted between elements
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};
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} // namespace leveldb
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