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#pragma once
#include "format.h"
#include <util/generic/string.h>
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
//! Appends a certain delimiter starting from the second call.
class TDelimitedStringBuilderWrapper
: private TNonCopyable
{
public:
TDelimitedStringBuilderWrapper(
TStringBuilderBase* builder,
TStringBuf delimiter = TStringBuf(", "))
: Builder_(builder)
, Delimiter_(delimiter)
{ }
TStringBuilderBase* operator->()
{
if (!FirstCall_) {
Builder_->AppendString(Delimiter_);
}
FirstCall_ = false;
return Builder_;
}
private:
TStringBuilderBase* const Builder_;
const TStringBuf Delimiter_;
bool FirstCall_ = true;
};
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
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