std::ctype<CharT>::~ctype

protected: ~ctype();

Destructs a std::ctype facet. This destructor is protected and virtual (due to base class destructor being virtual). An object of type std::ctype, like most facets, can only be destroyed when the last std::locale object that implements this facet goes out of scope or if a user-defined class is derived from std::ctype and implements a public destructor.

Example

#include <iostream>
#include <locale>
struct Destructible_ctype : public std::ctype<wchar_t>
{
    Destructible_ctype(std::size_t refs = 0) : ctype(refs) {}
    // note: the implicit destructor is public
};
int main()
{
    Destructible_ctype dc;
    // std::ctype<wchar_t> c;  // compile error: protected destructor
}