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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <type_traits>
namespace search::multivalue {
template <typename T> class WeightedValue;
/*
* Check for the presence of a weight.
*/
template <typename T>
struct is_WeightedValue : std::false_type {};
template <typename T>
struct is_WeightedValue<WeightedValue<T>> : std::true_type {};
template <typename T>
inline constexpr bool is_WeightedValue_v = is_WeightedValue<T>::value;
/*
* Extract inner type.
*/
template <typename T>
struct ValueType { using type = T; };
template <typename T>
struct ValueType<WeightedValue<T>> { using type = T; };
template <typename T>
using ValueType_t = typename ValueType<T>::type;
}
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