absolute path error

[tmmikolajczyk@…]

I have the following function that checks if a particular path is absolute or relative:

bool isPathAbsolute(const std::string& path) {

return !boost::filesystem::path(path).root_directory().empty();

}

Seems that it works fine for the following paths:

"/" absolute "/root" absolute "/" absolute "" absolute

However, for unknown reason function says that the path "" is not absolute. See attached very simple code that presents this problem.

[tmmikolajczyk@…]

the code printing the path's relativity checking result

[Beman Dawes]

This isn't a bug - it is done deliberately to conform to POSIX. Here is the POSIX definition of Absolute Pathname:

3.2 Absolute Pathname

A pathname beginning with a single or more than two slashes; see also Pathname.

IIRC, Windows also treats two slashes differently, although it has been a while since I looked at how Windows handles multiple slashes.

HTH,

--Beman