std::move_if_noexcept will return a movable r-value if the object has a noexcept move constructor, otherwise it will return a copyable l-value. We can use the noexcept specifier in conjunction with std::move_if_noexcept to use move semantics only when a strong exception guarantee exists (and use copy semantics otherwise).

std::move can be used whenever we want to treat an l-value like an r-value for the purpose of invoking move semantics instead of copy semantics.