std::collate::~collate - cppreference.com

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# std::collate::~collate

From cppreference.com
< cpp‎ | locale‎ | collate

Defined in header `<locale>` |  |
protected: ~collate(); |  |

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

### [edit] Example

Run this code

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

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