Macro join 

macro_rules! join {
    ( $( $x:expr ),* ) => { ... };
}

The method joins all given path segments together using the platform-specific separator as a delimiter, then normalizes the resulting path.

Zero-length path segments are ignored. If the joined path string is a zero-length string then ‘.’ will be returned, representing the current working directory.

assert_eq!(nodejs_path::posix::join!("/foo", "bar", "baz/asdf", "quux", ".."), "/foo/bar/baz/asdf");