std::ctype::~ctype - cppreference.com

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# std::ctype::~ctype

From cppreference.com
< cpp‎ | locale‎ | ctype

Defined in header `<locale>` |  |
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.

### [edit] Example

Run this code

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

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