std::experimental::filesystem::path:: string,wstring,u8string,...

From cppreference.com
template < class CharT, class Traits = std:: char_traits < CharT > ,

class Alloc = std:: allocator < CharT > >
std:: basic_string < CharT,Traits,Alloc >

string ( const Alloc & a = Alloc ( ) ) const ;
(1) (filesystem TS)
(2) (filesystem TS)
std:: string string ( ) const ;
std:: wstring wstring ( ) const ;
std:: string u8string ( ) const ;
std:: u16string u16string ( ) const ;
std:: u32string u32string ( ) const ;

Returns the internal pathname in native pathname format, converted to specific string type. Conversion, if any, is specified in todo .

1) All memory allocations are performed by a .
2) The encoding in the case of u8string() is always UTF-8.

Parameters

(none)

Return value

The internal pathname in native pathname format, converted to specified string type.

Exceptions

May throw implementation-defined exceptions.

Example

#include <clocale>
#include <cstdio>
#include <experimental/filesystem>
#include <fstream>
#include <iostream>
namespace fs = std::experimental::filesystem;
 
int main()
{
    std::setlocale(LC_ALL, "en_US.utf8");
    std::locale::global(std::locale("en_US.utf8"));
 
    fs::path p = fs::u8path(u8"要らない.txt");
 
    // native string representation can be used with OS APIs
    std::ofstream(p) << "File contents"; // this uses operator string()
    if (std::FILE* f = std::fopen(p.c_str(), "r"))
    {
        int ch;
        while ((ch=fgetc(f))!= EOF) putchar(ch);
        std::fclose(f);
    }
 
    // multibyte and wide representation can be used for output
    std::cout.imbue(std::locale());
    std::cout << "\nFile name in narrow multibyte encoding: "
              << p.string() << '\n';
 
    std::wcerr.imbue(std::locale());
    std::wcerr << "File name in wide encoding: "
               << p.wstring() << '\n';
 
    fs::remove(p);
}

Possible output:

File contents
File name in narrow multibyte encoding: 要らない.txt
File name in wide encoding: 要らない.txt

See also

returns the path in generic pathname format converted to a string
(public member function)