std::wstring_convert::~wstring_convert - cppreference.com

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# std::wstring_convert::~wstring_convert

From cppreference.com
< cpp‎ | locale‎ | wstring convert

~wstring_convert(); |  |

Destroys the `wstring_convert` object and deletes the pointer to the conversion facet.

### [edit] Notes

Some implementations are able to delete any facet, including the locale-specific facets with protected destructors. Other implementations require the facet to have a public destructor, similar to the the locale-independent facets from `<codecvt>`. This is LWG issue 721

### [edit] Example

Run this code

    #include <locale>
    #include <utility>
    #include <codecvt>

    // utility wrapper to adapt locale-bound facets for wstring/wbuffer convert
    template<class Facet>
    struct deletable_facet : Facet
    {
        template<class ...Args>
        deletable_facet(Args&& ...args) : Facet(std::forward<Args>(args)...) {}
        ~deletable_facet() {}
    };

    int main()
    {
        // GB18030 / UCS4 conversion, using locale-based facet directly
        // typedef std::codecvt_byname<char32_t, char, std::mbstate_t> gbfacet_t;
        // Compiler error: "calling a protected destructor of codecvt_byname<> in ~wstring_convert"
        // std::wstring_convert<gbfacet_t> gbto32(new gbfacet_t("zh_CN.gb18030"));

        // GB18030 / UCS4 conversion facet using a facet with public destructor
        typedef deletable_facet<std::codecvt_byname<char32_t, char, std::mbstate_t>> gbfacet_t;
        std::wstring_convert<gbfacet_t> gbto32(new gbfacet_t("zh_CN.gb18030"));
    } // destructor called here

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