30 Input/output library [input.output]

30.10 File systems [filesystems]

30.10.8 Class path [fs.class.path]

30.10.8.4 path members [fs.path.member]

30.10.8.4.10 path query [fs.path.query]

bool empty() const noexcept;
Returns: true if the pathname in the generic format is empty, else false.
bool has_root_path() const;
Returns: !root_­path().empty().
bool has_root_name() const;
Returns: !root_­name().empty().
bool has_root_directory() const;
Returns: !root_­directory().empty().
bool has_relative_path() const;
Returns: !relative_­path().empty().
bool has_parent_path() const;
Returns: !parent_­path().empty().
bool has_filename() const;
Returns: !filename().empty().
bool has_stem() const;
Returns: !stem().empty().
bool has_extension() const;
Returns: !extension().empty().
bool is_absolute() const;
Returns: true if the pathname in the native format contains an absolute path, else false.
[Example
:
path("/").is_­absolute() is true for POSIX-based operating systems, and false for Windows-based operating systems.
end example
]
bool is_relative() const;
Returns: !is_­absolute().