std::numpunct<CharT>:: ~numpunct

Destructs a std:: numpunct facet. This destructor is protected and virtual (due to base class destructor being virtual). An object of type std:: numpunct , 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:: numpunct and implements a public destructor.

Example

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