The std::add_volatile template of C++ STL is present in the <type_traits> header file. The std::add_volatile template of C++ STL is used to get the type T with volatile qualification. The function std::is_volatile is used to check if type T is volatile qualified or not.
template < class T > struct add_volatile;
Parameter: The template std::add_volatile accepts a single parameter T(Trait class) which is used to get the type T with volatile qualification.
Below is the program to demonstrate std::add_volatile: in C++:
checking volatileness: A: true B: true C: true D: true E: false
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