superbuild/modules/entt/src/entt/core/tuple.hpp

#ifndef ENTT_CORE_TUPLE_HPP
#define ENTT_CORE_TUPLE_HPP

#include <tuple>
#include <type_traits>
#include <utility>
#include "../config/config.h"

namespace entt {

/**
 * @brief Utility function to unwrap tuples of a single element.
 * @tparam Type Tuple type of any sizes.
 * @param value A tuple object of the given type.
 * @return The tuple itself if it contains more than one element, the first
 * element otherwise.
 */
template<typename Type>
constexpr decltype(auto) unwrap_tuple(Type &&value) ENTT_NOEXCEPT {
    if constexpr(std::tuple_size_v<std::remove_reference_t<Type>> == 1u) {
        return std::get<0>(std::forward<Type>(value));
    } else {
        return std::forward<Type>(value);
    }
}

} // namespace entt

#endif