std::numpunct<CharT>::~numpunct
From cppreference.com
| Defined in header <locale>
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| protected: ~numpunct(); |
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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
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#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 }