std::wstring_convert<Codecvt,Elem,Wide_alloc,Byte_alloc>::converted - cppreference.com (original) (raw)

Returns the number of source characters that were successfully processed by the most recent from_bytes() or to_bytes().

[edit] Return value

_[cvtcount](../wstring%5Fconvert.html#cvtcount "cpp/locale/wstring convert")_

[edit] Example

#include #include #include #include   int main() { std::string utf8 = "z\u00df\u6c34\U0001d10b"; // or u8"zß水𝄋" // or "\x7a\xc3\x9f\xe6\xb0\xb4\xf0\x9d\x84\x8b"; std::cout << "original UTF-8 string size: " << utf8.size() << '\n';   // the UTF-8 - UTF-32 standard conversion facet std::wstring_convert<std::codecvt_utf8, char32_t> cvt;   // UTF-8 to UTF-32 std::u32string utf32 = cvt.from_bytes(utf8); std::cout << "UTF-32 string size: " << utf32.size() << '\n'; std::cout << "converted() == " << cvt.converted() << '\n';   // UTF-32 to UTF-8 utf8 = cvt.to_bytes(utf32); std::cout << "new UTF-8 string size: " << utf8.size() << '\n'; std::cout << "converted() == " << cvt.converted() << '\n'; }

Output:

original UTF-8 string size: 10 UTF-32 string size: 4 converted() == 10 new UTF-8 string size: 10 converted() == 4

[edit] Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

[edit] See also

| | converts a wide string into a byte string (public member function) [edit] | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | converts a byte string into a wide string (public member function) [edit] |