Collecting into a PathBuf from Iterator<Item=Component> is hard.

[Mark-Simulacrum]

See discussion here: #41531.

To summarize, the following should work, but currently doesn't. It's likely that implementing impl<P: AsRef<OsStr>> FromIterator<P> for PathBuf would solve this, but I haven't tested.

use std::path::{PathBuf, Path};

fn main() {
    let path = Path::new("a/b/c/d");
    println!("{:?}", path.components().filter(|c| c.as_os_str() != "b").collect::<PathBuf>());
}

[ollie27]

The following already works fine:

use std::path::{Component, PathBuf, Path};

fn main() {
    let path = Path::new("a/b/c/d");
    println!("{:?}", path.components().map(Component::as_os_str).filter(|c| *c != "b").collect::<PathBuf>());
}

Maybe Component should implement AsRef<Path> as it already implements AsRef<OsStr> and OsStr implements AsRef<Path>.

[Mark-Simulacrum]

Component implementing AsRef<Path> seems like a good idea.

[dtolnay]

Sounds good to me, let's do it.