std::experimental::filesystem::path::c_str, std::experimental::filesystem::path::native, std::experimental::filesystem::path::operator string_type()
From cppreference.com
< cpp | experimental | fs | path
const value_type* c_str() const; |
(1) | (filesystem TS) |
const string_type& native() const; |
(2) | (filesystem TS) |
operator string_type() const; |
(3) | (filesystem TS) |
Accesses the native path name as a character string.
1) Equivalent to native().c_str().
2) Returns the native string representation of the pathname by reference.
3) Returns the native string representation of the pathname by value.
Contents |
[edit] Parameters
(none)
[edit] Return value
The native string representation of the pathname, using native syntax, native character type, and native character encoding. This string is suitable for use with OS APIs.
[edit] Exceptions
1,2)
noexcept specification:
noexcept
[edit] Notes
The conversion function (3) is provided so that standard file-opening APIs that accept std::basic_string file names, such as the std::ifstream constructor, can use pathnames with no changes to code:
fs::path p = "/tmp/text.txt"; std::ifstream f(p);
[edit] Example
Run this code
#include <cstdio> #include <clocale> #include <fstream> #include <iostream> #include <experimental/filesystem> 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); }
Output:
File contents File name in narrow multibyte encoding: 要らない.txt File name in wide encoding: 要らない.txt
[edit] See also
returns the path in native pathname format converted to a string (public member function) | |
returns the path in generic pathname format converted to a string (public member function) |