Merge pull request #68 from linouxis9/master

Update for latest nightly 2018-05-06

1 files changed, 92 insertions, 16 deletions

diff --git a/ctr-std/src/path.rs b/ctr-std/src/path.rs
index 2b76a2d..861c7dd 100644
--- a/ctr-std/src/path.rs
+++ b/ctr-std/src/path.rs
@@ -201,7 +201,7 @@ impl<'a> Prefix<'a> {
             os_str_as_u8_slice(s).len()
         }
         match *self {
-            #[cfg(target_os = "horizon")]
+	    #[cfg(target_os = "horizon")]
             Verbatim(x) => 1 + os_str_len(x),
             #[cfg(target_os = "windows")]
             Verbatim(x) => 4 + os_str_len(x),
@@ -300,10 +300,9 @@ pub const MAIN_SEPARATOR: char = ::sys::path::MAIN_SEP;
 // Iterate through `iter` while it matches `prefix`; return `None` if `prefix`
 // is not a prefix of `iter`, otherwise return `Some(iter_after_prefix)` giving
 // `iter` after having exhausted `prefix`.
-fn iter_after<A, I, J>(mut iter: I, mut prefix: J) -> Option<I>
-    where I: Iterator<Item = A> + Clone,
-          J: Iterator<Item = A>,
-          A: PartialEq
+fn iter_after<'a, 'b, I, J>(mut iter: I, mut prefix: J) -> Option<I>
+    where I: Iterator<Item = Component<'a>> + Clone,
+          J: Iterator<Item = Component<'b>>,
 {
     loop {
         let mut iter_next = iter.clone();
@@ -328,8 +327,7 @@ unsafe fn u8_slice_as_os_str(s: &[u8]) -> &OsStr {
 
 // Detect scheme on Redox
 fn has_redox_scheme(s: &[u8]) -> bool {
-    (cfg!(target_os = "redox") || cfg!(target_os = "horizon"))
-    && s.split(|b| *b == b'/').next().unwrap_or(b"").contains(&b':')
+    cfg!(target_os = "redox") && s.split(|b| *b == b'/').next().unwrap_or(b"").contains(&b':')
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -909,7 +907,7 @@ impl<'a> DoubleEndedIterator for Iter<'a> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.26.0")]
 impl<'a> FusedIterator for Iter<'a> {}
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1012,7 +1010,7 @@ impl<'a> DoubleEndedIterator for Components<'a> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.26.0")]
 impl<'a> FusedIterator for Components<'a> {}
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1039,6 +1037,50 @@ impl<'a> cmp::Ord for Components<'a> {
     }
 }
 
+/// An iterator over [`Path`] and its ancestors.
+///
+/// This `struct` is created by the [`ancestors`] method on [`Path`].
+/// See its documentation for more.
+///
+/// # Examples
+///
+/// ```
+/// #![feature(path_ancestors)]
+///
+/// use 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)]
+#[unstable(feature = "path_ancestors", issue = "48581")]
+pub struct Ancestors<'a> {
+    next: Option<&'a Path>,
+}
+
+#[unstable(feature = "path_ancestors", issue = "48581")]
+impl<'a> Iterator for Ancestors<'a> {
+    type Item = &'a Path;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let next = self.next;
+        self.next = match next {
+            Some(path) => path.parent(),
+            None => None,
+        };
+        next
+    }
+}
+
+#[unstable(feature = "path_ancestors", issue = "48581")]
+impl<'a> FusedIterator for Ancestors<'a> {}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Basic types and traits
 ////////////////////////////////////////////////////////////////////////////////
@@ -1740,7 +1782,7 @@ impl Path {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[allow(deprecated)]
     pub fn is_absolute(&self) -> bool {
-        if cfg!(target_os = "redox") || cfg!(target_os = "horizon") {
+        if cfg!(target_os = "redox") {
             // FIXME: Allow Redox prefixes
             self.has_root() || has_redox_scheme(self.as_u8_slice())
         } else {
@@ -1824,12 +1866,43 @@ impl Path {
         })
     }
 
+    /// Produces an iterator over `Path` and its ancestors.
+    ///
+    /// The iterator will yield the `Path` that is returned if the [`parent`] method is used zero
+    /// or more times. That means, the iterator will yield `&self`, `&self.parent().unwrap()`,
+    /// `&self.parent().unwrap().parent().unwrap()` and so on. If the [`parent`] method returns
+    /// [`None`], the iterator will do likewise. The iterator will always yield at least one value,
+    /// namely `&self`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(path_ancestors)]
+    ///
+    /// use std::path::Path;
+    ///
+    /// let mut ancestors = Path::new("/foo/bar").ancestors();
+    /// assert_eq!(ancestors.next(), Some(Path::new("/foo/bar")));
+    /// assert_eq!(ancestors.next(), Some(Path::new("/foo")));
+    /// assert_eq!(ancestors.next(), Some(Path::new("/")));
+    /// assert_eq!(ancestors.next(), None);
+    /// ```
+    ///
+    /// [`None`]: ../../std/option/enum.Option.html#variant.None
+    /// [`parent`]: struct.Path.html#method.parent
+    #[unstable(feature = "path_ancestors", issue = "48581")]
+    pub fn ancestors(&self) -> Ancestors {
+        Ancestors {
+            next: Some(&self),
+        }
+    }
+
     /// Returns the final component of the `Path`, if there is one.
     ///
     /// If the path is a normal file, this is the file name. If it's the path of a directory, this
     /// is the directory name.
     ///
-    /// Returns [`None`] If the path terminates in `..`.
+    /// Returns [`None`] if the path terminates in `..`.
     ///
     /// [`None`]: ../../std/option/enum.Option.html#variant.None
     ///
@@ -1869,7 +1942,7 @@ impl Path {
     /// # Examples
     ///
     /// ```
-    /// use std::path::Path;
+    /// use std::path::{Path, PathBuf};
     ///
     /// let path = Path::new("/test/haha/foo.txt");
     ///
@@ -1880,17 +1953,20 @@ impl Path {
     /// assert_eq!(path.strip_prefix("/test/haha/foo.txt/"), Ok(Path::new("")));
     /// assert_eq!(path.strip_prefix("test").is_ok(), false);
     /// assert_eq!(path.strip_prefix("/haha").is_ok(), false);
+    ///
+    /// let prefix = PathBuf::from("/test/");
+    /// assert_eq!(path.strip_prefix(prefix), Ok(Path::new("haha/foo.txt")));
     /// ```
     #[stable(since = "1.7.0", feature = "path_strip_prefix")]
-    pub fn strip_prefix<'a, P: ?Sized>(&'a self, base: &'a P)
-                                       -> Result<&'a Path, StripPrefixError>
+    pub fn strip_prefix<P>(&self, base: P)
+                           -> Result<&Path, StripPrefixError>
         where P: AsRef<Path>
     {
         self._strip_prefix(base.as_ref())
     }
 
-    fn _strip_prefix<'a>(&'a self, base: &'a Path)
-                         -> Result<&'a Path, StripPrefixError> {
+    fn _strip_prefix(&self, base: &Path)
+                     -> Result<&Path, StripPrefixError> {
         iter_after(self.components(), base.components())
             .map(|c| c.as_path())
             .ok_or(StripPrefixError(()))