std::num_get<CharT,InputIt>::~num_get
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Defined in header
<locale>
protected: ~num_get();
Destructs a std::num_get facet. This destructor is protected and virtual (due to base class destructor being virtual). An object of type std::num_get , 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_get and implements a public destructor.
[edit] Example
Run this code
#include <iostream> #include <locale> struct Destructible_num_get : public std::num_get <wchar_t> { Destructible_num_get(std::size_t refs = 0) : num_get(refs) {} // note: the implicit destructor is public }; int main() { Destructible_num_get dc; // std::num_get<wchar_t> c; // compile error: protected destructor }