Converting string to wstring fails in Visual Studio

Question

The following code is intended to provide a function to convert string in utf-8 to utf-16. But it fails. How can I fix it to work in Visual Studio 2017 C++17:

#define _SILENCE_ALL_CXX17_DEPRECATION_WARNINGS #include <iostream> #include <string> #include <locale> #include <codecvt> #include <fstream> using namespace std; wstring utf8_to_uft16(string str) { wstring_convert<std::codecvt_utf8_utf16<int16_t>, int16_t> convert; auto p = reinterpret_cast<const wchar_t *>(convert.from_bytes(str).data()); return wstring(p); } int main() { string u8 = u8"hello"; wstring u16 = utf8_to_uft16(u8); wcout << u16; cin.ignore(1); }

the produced string by the function is empty and nothing is printed.

Alan Birtles · Accepted Answer · 2019-01-15 13:45:00Z

wstring_convert::from_bytes returns a std::basic_string. This string will be destroyed at the end of the line and the pointer returned from data() will no longer be valid.

Is there a reason you don't just convert directly to wchar_t?

wstring utf8_to_uft16( string str ) { wstring_convert<std::codecvt_utf8_utf16<wchar_t>, wchar_t> convert; return convert.from_bytes( str ); }

Collectives™ on Stack Overflow

Converting string to wstring fails in Visual Studio

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related