ClickHouse/dbms/src/IO/WriteBufferFromString.h

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#pragma once
#include <string>
#include <IO/WriteBufferFromVector.h>
#include <common/StringRef.h>
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namespace DB
{
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/** Writes the data to a string.
* Note: before using the resulting string, destroy this object.
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*/
using WriteBufferFromString = WriteBufferFromVector<std::string>;
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namespace detail
{
/// For correct order of initialization.
class StringHolder
{
protected:
std::string value;
};
}
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/// Creates the string by itself and allows to get it.
class WriteBufferFromOwnString : public detail::StringHolder, public WriteBufferFromString
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{
public:
WriteBufferFromOwnString() : WriteBufferFromString(value) {}
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StringRef stringRef() const { return isFinished() ? StringRef(value) : StringRef(value.data(), pos - value.data()); }
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std::string & str()
{
finish();
return value;
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}
};
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}