C++ string conversion UTF8 <-> UTF16

cpp_utf8_utf16.cpp

#include <string> 
#include <locale> 
#include <codecvt> 
 
//UTF-8 to UTF-16 
std::string source; 
//... 
std::wstring_convert<std::codecvt_utf8_utf16<char16_t>,char16_t> convert; 
std::u16string dest = convert.from_bytes(source);     
 
//UTF-16 to UTF-8 
std::u16string source; 
//... 
std::wstring_convert<std::codecvt_utf8_utf16<char16_t>,char16_t> convert; 
std::string dest = convert.to_bytes(source);     

codecvt_utf8* with wstring_convert deprecated in C++17, removed in C++26