std::wbuffer_convert::wbuffer_convert - cppreference.com

##### cppreference.com

##### Search

Create account

##### Namespaces

- Page
- Discussion

##### Variants

##### Views

- View
- Edit
- History

##### Actions

# std::wbuffer_convert::wbuffer_convert

From cppreference.com
< cpp‎ | locale‎ | wbuffer convert

explicit wbuffer_convert( std::streambuf* bytebuf = 0, Codecvt* pcvt = new Codecvt, state_type state = state_type() ); | (1) |
wbuffer_convert(const std::wbuffer_convert&) = delete; | (2) | (since C++14)

1) Constructs the `wbuffer_convert` object with the specified underlying byte stream, specified `codecvt` facet, and specified initial conversion state (all parameters are optional)
2) The copy constructor is deleted, `wbuffer_convert` is not `CopyConstructible`

### [edit] Parameters

bytebuf | - | pointer to std::streambuf to serve as the underlying narrow character stream
pcvt | - | pointer to a standalone (not managed by a locale) std::codecvt facet. The behavior is undefined if this pointer is null.
state | - | the initial value of the character conversion state

### [edit] Example

Run this code

    #include <iostream>
    #include <sstream>
    #include <locale>
    #include <codecvt>
    int main()
    {
        // wrap a UTF-8 string stream in a UCS4 wbuffer_convert
        std::stringbuf utf8buf(u8"z\u00df\u6c34\U0001f34c");  // or u8"zß水🍌"
                           // or "\x7a\xc3\x9f\xe6\xb0\xb4\xf0\x9f\x8d\x8c";
        std::wbuffer_convert<std::codecvt_utf8<wchar_t>> conv_in(&utf8buf);
        std::wistream ucsbuf(&conv_in);
        std::cout << "Reading from a UTF-8 stringbuf via wbuffer_convert:\n";
        for(wchar_t c; ucsbuf.get(c); )
            std::cout << std::hex << std::showbase << c << '\n';

        // wrap a UTF-8 aware std::cout in a UCS4 wbuffer_convert to output UCS4
        std::wbuffer_convert<std::codecvt_utf8<wchar_t>> conv_out(std::cout.rdbuf());
        std::wostream out(&conv_out);
        std::cout << "Sending UCS4 data to std::cout via wbuffer_convert:\n";
        out << L"z\u00df\u6c34\U0001f34c\n";
    }

Output:

    Reading from a UTF-8 stringbuf via wbuffer_convert produces
    0x7a
    0xdf
    0x6c34
    0x1f34c
    Sending UCS4 data to std::cout via wbuffer_convert:
    zß水🍌

Retrieved from "http://en.cppreference.com/mwiki/index.php?title=cpp/locale/wbuffer_convert/wbuffer_convert&oldid=64465"