std::wbuffer_convert<Codecvt,Elem,Tr>::rdbuf
From cppreference.com
< cpp | locale | wbuffer convert
C++
Feature test macros (C++20)
Concepts library (C++20)
Metaprogramming library (C++11)
Ranges library (C++20)
Filesystem library (C++17)
Concurrency support library (C++11)
Execution control library (C++26)
Text processing library
Regular expressions library (C++11)
Formatting library (C++20)
(C++17)
(C++17)
(C++17)
(C++17)
(C++17)
(C++26)
Localization library
(C++11/17/26*)
(C++11/17/26*)
(C++11/17/26*)
(C++11/17/26*)
(C++11/17/26*)
(C++11/17/26*)
std::wbuffer_convert
Member functions
wbuffer_convert::rdbuf
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.
[edit] Return value
1)
bufptr 2) the previous value of
bufptr [edit] 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𝄋