30 Input/output library [input.output]

30.10 File systems [filesystems]

30.10.7 Class path [fs.class.path]

30.10.7.4 path members [fs.path.member]

30.10.7.4.5 path modifiers [fs.path.modifiers]

void clear() noexcept;
Postconditions: empty() == true.
path& make_preferred();
Effects: Each directory-separator of the pathname in the generic format is converted to preferred-separator.
Returns: *this.
[Example
:
path p("foo/bar");
std::cout << p << '\n';
p.make_preferred();
std::cout << p << '\n';
On an operating system where preferred-separator is a slash, the output is:
"foo/bar"
"foo/bar"
On an operating system where preferred-separator is a backslash, the output is:
"foo/bar"
"foo\bar"
end example
]
path& remove_filename();
Postconditions: !has_­filename().
Effects: Remove the generic format pathname of filename() from the generic format pathname.
Returns: *this.
[Example
:
path("foo/bar").remove_filename(); // yields "foo/"
path("foo/").remove_filename();    // yields "foo/"
path("/foo").remove_filename();    // yields "/"
path("/").remove_filename();       // yields "/"
end example
]
path& replace_filename(const path& replacement);
Effects: Equivalent to:
remove_filename();
operator/=(replacement);
Returns: *this.
[Example
:
path("/foo").replace_filename("bar");  // yields "/bar" on POSIX
path("/").replace_filename("bar");     // yields "/bar" on POSIX
end example
]
path& replace_extension(const path& replacement = path());
Effects:
  • Any existing extension()([fs.path.decompose]) is removed from the pathname in the generic format, then
  • If replacement is not empty and does not begin with a dot character, a dot character is appended to the pathname in the generic format, then
  • operator+=(replacement);.
Returns: *this.
void swap(path& rhs) noexcept;
Effects: Swaps the contents (in all formats) of the two paths.
Complexity: Constant time.