Namespaces
Variants
Views
Actions

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

From cppreference.com
< cpp‎ | experimental‎ | fs‎ | path
 
 
Technical specifications
Filesystem library (filesystem TS)
Library fundamentals (library fundamentals TS)
Library fundamentals 2 (library fundamentals TS v2)
Library fundamentals 3 (library fundamentals TS v3)
Extensions for parallelism (parallelism TS)
Extensions for parallelism 2 (parallelism TS v2)
Extensions for concurrency (concurrency TS)
Concepts (concepts TS)
Ranges (ranges TS)
Mathematical special functions (special functions TR)
 
 
 
path();
(1) (filesystem TS)
path( const path& p );
(2) (filesystem TS)
path( path&& p );
(3) (filesystem TS)
template< class Source >
path( const Source& source );
(4) (filesystem TS)
template< class InputIt >
path( InputIt first, InputIt last );
(5) (filesystem TS)
template< class Source >
path( const Source& source, const std::locale& loc );
(6) (filesystem TS)
template< class InputIt >
path( InputIt first, InputIt last, const std::locale& loc );
(7) (filesystem TS)

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.

Contents

[edit] 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))

[edit] Exceptions

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

[edit] Notes

For portable pathname generation from Unicode strings, see u8path.

[edit] Example

#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"

[edit] See also

creates a path from a UTF-8 encoded source
(function) [edit]