std::num_put (3) Linux Manual Page

std::num_put<CharT,OutputIt>::~num_put – std::num_put<CharT,OutputIt>::~num_put

Synopsis

Defined in header <locale>

protected: ~num_put();

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

Example

// Run this code

#include <iostream>

#include <locale>

struct Destructible_num_put : public std::num_put<wchar_t>

{
    Destructible_num_put(std::size_t refs = 0)
        : num_put(refs)
    {
    }
    // note: the implicit destructor is public
};

int main()

{
    Destructible_num_put dc;
    // std::num_put<wchar_t> c;  // compile error: protected destructor
}