stdremovevolatiletvolatileint

std::remove_volatile_t is a type alias defined in the C++ Standard Library header <type_traits>. It is part of the type traits facility that provides compile‑time information and transformations about types. The alias removes the volatile qualifier from a given type, yielding the same type minus the top‑level volatile. If the original type does not have a volatile qualifier, the alias simply yields that type unchanged. The alias is defined as follows: template<class T> using remove_volatile_t = typename remove_volatile<T>::type; where remove_volatile<T> is a type trait that produces a type identical to T except that its top‑level volatile qualification is removed.

This construct is useful in generic programming when a type may appear with const or volatile qualifiers that are irrelevant to the intended behavior. For example, template code that operates on container elements can strip volatile qualifiers before performing operations that are not affected by volatility. It can also be combined with other type traits, such as std::remove_cv_t, to remove both const and volatile qualifiers in a single step: std::remove_cv_t<T>.

The alias guarantees that it is noexcept‑safe and does not instantiate any side effects, making it a lightweight tool for constexpr programming. It is typically used in static assertions, template parameter deduction, and the implementation of other type utilities. The standard requires that std::remove_volatile_t<T> shall be equivalent to T if T is not volatile-qualified, otherwise it shall be the same as the type T with its top‑level volatile qualifier removed. This behavior is consistent across all conforming implementations of the C++ Standard Library.