utils.hpp

// Copyright Take Vos 2020.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
namespace tt {
 
template<typename T, typename U>
[[nodiscard]] bool compare_then_assign(T &lhs, U &&rhs) noexcept
{
    if (lhs != rhs) {
        lhs = std::forward<U>(rhs);
        return true;
    } else {
        return false;
    }
}
 
template<typename... Args>
[[nodiscard]] constexpr size_t nr_arguments(Args const &...args) noexcept
{
    return sizeof...(Args);
}
 
}