std::wstring_convert<Codecvt,Elem,Wide_alloc,Byte_alloc>::converted (3) - Linux Manuals

std::wstring_convert<Codecvt,Elem,Wide_alloc,Byte_alloc>::converted: std::wstring_convert<Codecvt,Elem,Wide_alloc,Byte_alloc>::converted

NAME

std::wstring_convert<Codecvt,Elem,Wide_alloc,Byte_alloc>::converted - std::wstring_convert<Codecvt,Elem,Wide_alloc,Byte_alloc>::converted

Synopsis

Defined in header <locale>
std::size_t converted() const; (until C++14)
std::size_t converted() const noexcept; (since C++14)

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

Return value

The number of characters consumed by the most recent conversion operation.

Example

// Run this code

  #include <iostream>
  #include <string>
  #include <locale>
  #include <codecvt>
  int main()
  {
      std::string utf8 = u8"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>, 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