Converting wchar_t * to char * in C++20

Question

Currently using WSL2 Ubuntu, G++20.

What are some recommended ways to convert wchar_t * to char * in C++20? I have seen similar posts created several years ago, but I wasn't sure if they were still viable as a solution or if they were deprecated.

Answer 1

If I'm not mistaken wcstombs (and wcsrtombs ) is still relevant in C++ 20:

#include <iostream>
#include <clocale>
#include <cstdlib>
 
int main()
{
    std::setlocale(LC_ALL, "en_US.utf8");
    // UTF-8 narrow multibyte encoding
    const wchar_t* wstr = L"z\u00df\u6c34\U0001d10b"; // or L"zß水𝄋"
    char mbstr[11];
    std::wcstombs(mbstr, wstr, 11);
    std::cout << "multibyte string: " << mbstr << '\n';
}