31 Input/output library [input.output]

31.12 File systems [filesystems]

31.12.6 Class path [fs.class.path]

31.12.6.5 Members [fs.path.member]

31.12.6.5.2 Assignments [fs.path.assign]

path& operator=(const path& p);
Effects: If *this and p are the same object, has no effect.
Otherwise, sets both respective pathnames of *this to the respective pathnames of p.
Returns: *this.
path& operator=(path&& p) noexcept;
Effects: If *this and p are the same object, has no effect.
Otherwise, sets both respective pathnames of *this to the respective pathnames of p.
p is left in a valid but unspecified state.
[Note 1: 
A valid implementation is swap(p).
— end note]
Returns: *this.
path& operator=(string_type&& source); path& assign(string_type&& source);
Effects: Sets the pathname in the detected-format of source to the original value of source.
source is left in a valid but unspecified state.
Returns: *this.
template<class Source> path& operator=(const Source& source); template<class Source> path& assign(const Source& source); template<class InputIterator> path& assign(InputIterator first, InputIterator last);
Effects: Let s be the effective range of source ([fs.path.req]) or the range [first, last), with the encoding converted if required ([fs.path.cvt]).
Finds the detected-format of s ([fs.path.fmt.cvt]) and sets the pathname in that format to s.
Returns: *this.