Availability:built-in
is_absolute_file_name(+File)True if File specifies an absolute path name. On POSIX
systems, this implies the path starts with a‘/’. For
Microsoft-based systems this implies the path starts with <letter>:
or //<host>/. This predicate is intended
to provide platform-independent checking for absolute paths. See also absolute_file_name/2
and
prolog_to_os_filename/2.