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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <memory>
namespace vespalib {
/**
* abstract interface for an iterable sequence.
**/
template <typename T>
struct Sequence
{
using UP = std::unique_ptr<Sequence>;
virtual bool valid() const = 0;
virtual T get() const = 0;
virtual void next() = 0;
virtual ~Sequence() {}
};
} // namespace vespalib
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