std::experimental::filesystem::path::path (3) - Linux Manuals

std::experimental::filesystem::path::path: std::experimental::filesystem::path::path

NAME

std::experimental::filesystem::path::path - std::experimental::filesystem::path::path

Synopsis

path(); (1) (filesystem TS)
path( const path& p ); (2) (filesystem TS)
path( path&& p ); (3) (filesystem TS)
template< class Source > (4) (filesystem TS)
path( const Source& source );
template< class InputIt > (5) (filesystem TS)
path( InputIt first, InputIt last );
template< class Source > (6) (filesystem TS)
path( const Source& source, const std::locale& loc );
template< class InputIt > (7) (filesystem TS)
path( InputIt first, InputIt last, const std::locale& loc );

Constructs a new path object.
1) Constructs an empty path.
2) Copy constructor. Constructs a copy of p.
3) Move constructor. Constructs a copy of p, p is left in valid but unspecified state.
4-5) Constructs the path from a character sequence provided by source (4), which is a pointer or an input iterator to a null-terminated character/wide character sequence or an std::basic_string, or represented as a pair of input iterators [first, last) (5). Any of the four character types char, char16_t, char32_t, wchar_t is allowed, and the method of conversion to the native character set depends on the character type used by source

      * If the source character type is char, the encoding of the source is assumed to be the native narrow encoding (so no conversion takes place on POSIX systems)
      * If the source character type is char16_t, conversion from UTF-16 to native filesystem encoding is used.
      * If the source character type is char32_t, conversion from UTF-32 to native filesystem encoding is used.
      * If the source character type is wchar_t, the input is assumed to be the native wide encoding (so no conversion takes places on Windows)

6-7) Constructs the path from a character sequence provided by source (6), which is a pointer or an input iterator to a null-terminated character sequence or an std::string, or represented as a pair of input iterators [first, last) ((7)). The only character type allowed is char. Uses loc to perform the character encoding conversion. If value_type is wchar_t, converts from to wide using the std::codecvt<wchar_t, char, std::mbstate_t> facet of loc. Otherwise, first converts to wide using the std::codecvt<wchar_t, char, std::mbstate_t> facet and then converts to filesystem native character type using std::codecvt<wchar_t,value_type> facet of loc.

Parameters

p - a path to copy
source - a std::basic_string, pointer to a null-terminated character string, or an input iterator with a character value type that points to a null-terminated character sequence (the character type must be char for overload (6)
first, last - pair of LegacyInputIterators that specify a UTF-8 encoded character sequence
loc - locale that defines encoding conversion to use

Type requirements

-
InputIt must meet the requirements of LegacyInputIterator.
-
The value type of InputIt must be one of the four character types char, wchar_t, char16_t and char32_t to use the overload (5))
-
The value type of InputIt must be char to use the overload (7))

Exceptions

1-2) (none)
3)
noexcept specification:
noexcept
4-7) (none)

Notes

For portable pathname generation from Unicode strings, see u8path.

Example

// Run this code

  #include <iostream>
  #include <experimental/filesystem>
  namespace fs = std::experimental::filesystem;
  int main()
  {
      fs::path p1 = "/usr/lib/sendmail.cf"; // portable format
      fs::path p2 = "C:\\users\\abcdef\\AppData\\Local\\Temp\\"; // native format
      fs::path p3 = L"D:/猫.txt"; // wide string

      std::cout << "p1 = " << p1 << '\n'
                << "p2 = " << p2 << '\n'
                << "p3 = " << p3 << '\n';
  }

Output:

  p1 = "/usr/lib/sendmail.cf"
  p2 = "C:\users\abcdef\AppData\Local\Temp\"
  p3 = "D:/猫.txt"