NAME¶

std::experimental::filesystem::path::append, - std::experimental::filesystem::path::append,

Synopsis¶

path& operator/=( const path& p ); (1) (filesystem TS)
template< class Source > (2) (filesystem TS)
path& operator/=( const Source& source );
template< class Source > (3) (filesystem TS)
path& append( const Source& source );
template< class InputIt > (4) (filesystem TS)
path& append( InputIt first, InputIt last );

1) First, appends the preferred directory separator to this, except if any of the
following conditions is true:
* the separator would be redundant (*this already ends with a separator).
* *this is empty, or adding it would turn a relative path to an absolute path in
some other way.
* p is an empty path.
* p.native() begins with a directory separator.
Then, appends p.native() to the pathname maintained by *this.
2,3) Same as (1), but accepts any std::basic_string, null-terminated multicharacter
string, or an input iterator pointing to a null-terminated multicharacter sequence.
4) Same as (1), but accepts any iterator pair that designates a multicharacter
string.

Parameters¶

p - pathname to append
std::basic_string, null-terminated multicharacter string, or an input
source - iterator pointing to a null-terminated multicharacter sequence, which
represents a path name (either in portable or in native format)
first, last - pair of LegacyInputIterators that specify a multicharacter sequence
that represents a path name

Type requirements¶

-
InputIt must meet the requirements of LegacyInputIterator.
-
The value type of InputIt must be one of the encoded character types (char, wchar_t,
char16_t and char32_t).

Return value¶

*this

Exceptions¶

May throw filesystem_error on underlying OS API errors or std::bad_alloc if memory
allocation fails.

Example¶

// Run this code

#include <experimental/filesystem>
#include <iostream>
namespace fs = std::experimental::filesystem;

int main()
{
fs::path p1 = "C:";
p1 /= "Users"; // does not insert a separator
// "C:Users" is a relative path in Windows
// adding directory separator would turn it to an absolute path
std::cout << "\"C:\" / \"Users\" == " << p1 << '\n';
p1 /= "batman"; // inserts fs::path::preferred_separator, '\' on Windows
std::cout << "\"C:\" / \"Users\" / \"batman\" == " << p1 << '\n';
}

Possible output:¶

"C:" / "Users" == "C:Users"
"C:" / "Users" / "batman" == "C:Users\batman"

See also¶

concat concatenates two paths without introducing a directory separator
operator+= (public member function)
operator/ concatenates two paths with a directory separator
(function)

Category:¶

* Noindexed pages