std::filesystem::path:: is_absolute,is_relative

bool is_absolute ( ) const ;	(1)	(since C++17)
bool is_relative ( ) const ;	(2)	(since C++17)

Checks whether the path is absolute or relative. An absolute path is a path that unambiguously identifies the location of a file without reference to an additional starting location. The first version returns true if the path, in native format, is absolute, false otherwise; the second version the other way round.

Parameters

(none)

Return value

Exceptions

May throw implementation-defined exceptions.

Notes

The path "/" is absolute on a POSIX OS, but is relative on Windows.

See also

absolute (C++17)

composes an absolute path (function)