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std::wbuffer_convert::~wbuffer_convert(3) C++ Standard Libary std::wbuffer_convert::~wbuffer_convert(3)


std::wbuffer_convert::~wbuffer_convert - std::wbuffer_convert::~wbuffer_convert


Defined in header <locale>

Destroys the wbuffer_convert object and deletes the pointer to the conversion facet.


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 locale-independent facets from <codecvt>.


// Run this code

#include <locale>
#include <utility>
#include <iostream>
#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 ~wbuffer_convert"
// std::wbuffer_convert<gbfacet_t, char32_t> gbto32(std::cout.rdbuf(),
// 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::wbuffer_convert<gbfacet_t, char32_t> gbto32(std::cout.rdbuf(),
new gbfacet_t("zh_CN.gb18030"));
} // destructor called here

See also

destructs the wstring_convert and its conversion facet
destructor (public member function of