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)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 |
Example
#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🍌
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