NAME¶

std::wbuffer_convert::rdbuf - std::wbuffer_convert::rdbuf

Synopsis¶

Defined in header <locale>
std::streambuf* rdbuf() const; (1)
std::streambuf* rdbuf( std::streambuf* bytebuf ); (2)

1) Returns the pointer to the underlying byte stream.
2) Replaces the associated byte stream with bytebuf.

Return value¶

1) The current underlying byte stream.
2) The previous byte stream.

Example¶

// Run this code

#include <codecvt>
#include <iostream>
#include <locale>
#include <sstream>

int main()
{
// Convert UTF-8 to UCS4
std::stringbuf utf8buf("z\u00df\u6c34\U0001d10b");
// or "\x7a\xc3\x9f\xe6\xb0\xb4\xf0\x9d\x84\x8b"
// or u8"zß水𝄋"
std::wbuffer_convert<std::codecvt_utf8<wchar_t>> conv(&utf8buf);
std::wistream ucsbuf(&conv);
std::cout << "Reading from a UTF-8 stringbuf via wbuffer_convert: "
<< std::hex << std::showbase;
for (wchar_t c; ucsbuf.get(c);)
std::cout << static_cast<std::wint_t>(c) << ' ';

// Reuse the same wbuffer_convert to handle UCS4 to UTF-8 output
conv.rdbuf(std::cout.rdbuf());
std::wostream out(&conv);
std::cout << "\nSending UCS4 data to std::cout via wbuffer_convert: ";
out << L"z\u00df\u6c34\U0001d10b\n";
}

Output:¶

Reading from a UTF-8 stringbuf via wbuffer_convert: 0x7a 0xdf 0x6c34 0x1d10b
Sending UCS4 data to std::cout via wbuffer_convert: zß水𝄋

See also¶

constructor constructs a new wbuffer_convert
(public member function)