29 Input/output library [input.output]

29.12 File systems [filesystems]

29.12.6 Class path [fs.class.path]

29.12.6.8 Non-member functions [fs.path.nonmember]

void swap(path& lhs, path& rhs) noexcept;
Effects: Equivalent to lhs.swap(rhs).
size_t hash_value(const path& p) noexcept;
Returns: A hash value for the path p.
If for two paths, p1 == p2 then hash_­value(p1) == hash_­value(p2).
friend bool operator==(const path& lhs, const path& rhs) noexcept;
Returns: lhs.compare(rhs) == 0.
[Note 1:
Path equality and path equivalence have different semantics.
  • Equality is determined by the path non-member operator==, which considers the two paths' lexical representations only.
    [Example 1:
    path("foo") == "bar" is never true.
    — end example]
  • Equivalence is determined by the equivalent() non-member function, which determines if two paths resolve ([fs.class.path]) to the same file system entity.
    [Example 2:
    equivalent("foo", "bar") will be true when both paths resolve to the same file.
    — end example]
— end note]
friend strong_ordering operator<=>(const path& lhs, const path& rhs) noexcept;
Returns: lhs.compare(rhs) <=> 0.
friend path operator/(const path& lhs, const path& rhs);
Effects: Equivalent to: return path(lhs) /= rhs;