Refactor

Author: Stjepan Glavina

src/path/ancestors.rs

@@ -0,0 +1,39 @@
+use std::iter::FusedIterator;
+
+use crate::path::Path;
+
+/// An iterator over [`Path`] and its ancestors.
+///
+/// This `struct` is created by the [`ancestors`] method on [`Path`].
+/// See its documentation for more.
+///
+/// # Examples
+///
+/// ```
+/// use async_std::path::Path;
+///
+/// let path = Path::new("/foo/bar");
+///
+/// for ancestor in path.ancestors() {
+///     println!("{}", ancestor.display());
+/// }
+/// ```
+///
+/// [`ancestors`]: struct.Path.html#method.ancestors
+/// [`Path`]: struct.Path.html
+#[derive(Copy, Clone, Debug)]
+pub struct Ancestors<'a> {
+    pub(crate) next: Option<&'a Path>,
+}
+
+impl<'a> Iterator for Ancestors<'a> {
+    type Item = &'a Path;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let next = self.next;
+        self.next = next.and_then(Path::parent);
+        next
+    }
+}
+
+impl FusedIterator for Ancestors<'_> {}

src/path/mod.rs

@@ -4,6 +4,7 @@
 //!
 //! [`std::path`]: https://doc.rust-lang.org/std/path/index.html
 
+mod ancestors;
 mod path;
 mod pathbuf;
 
@@ -23,5 +24,6 @@ pub use std::path::MAIN_SEPARATOR;
 #[doc(inline)]
 pub use std::path::is_separator;
 
-pub use path::{Ancestors, Path};
+use ancestors::Ancestors;
+pub use path::Path;
 pub use pathbuf::PathBuf;