X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=library%2Fstd%2Fsrc%2Fpath.rs;h=6c957c2fa90eb517088f085687474dbc3b6d702a;hb=8de4b138455add55bde6de5553a933a2ab79b71f;hp=af88b9070c189dc31033414d49f6e69753a6d1dc;hpb=43dca249a218305591e6eb896dd63c419871b018;p=rust.git

diff --git a/library/std/src/path.rs b/library/std/src/path.rs
index af88b9070c1..6c957c2fa90 100644
--- a/library/std/src/path.rs
+++ b/library/std/src/path.rs
@@ -1463,6 +1463,30 @@ fn _set_extension(&mut self, extension: &OsStr) -> bool {
         true
     }
 
+    /// Yields a mutable reference to the underlying [`OsString`] instance.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(path_as_mut_os_str)]
+    /// use std::path::{Path, PathBuf};
+    ///
+    /// let mut path = PathBuf::from("/foo");
+    ///
+    /// path.push("bar");
+    /// assert_eq!(path, Path::new("/foo/bar"));
+    ///
+    /// // OsString's `push` does not add a separator.
+    /// path.as_mut_os_string().push("baz");
+    /// assert_eq!(path, Path::new("/foo/barbaz"));
+    /// ```
+    #[unstable(feature = "path_as_mut_os_str", issue = "105021")]
+    #[must_use]
+    #[inline]
+    pub fn as_mut_os_string(&mut self) -> &mut OsString {
+        &mut self.inner
+    }
+
     /// Consumes the `PathBuf`, yielding its internal [`OsString`] storage.
     ///
     /// # Examples
@@ -1993,6 +2017,28 @@ pub fn as_os_str(&self) -> &OsStr {
         &self.inner
     }
 
+    /// Yields a mutable reference to the underlying [`OsStr`] slice.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(path_as_mut_os_str)]
+    /// use std::path::{Path, PathBuf};
+    ///
+    /// let mut path = PathBuf::from("/Foo.TXT").into_boxed_path();
+    ///
+    /// assert_ne!(&*path, Path::new("/foo.txt"));
+    ///
+    /// path.as_mut_os_str().make_ascii_lowercase();
+    /// assert_eq!(&*path, Path::new("/foo.txt"));
+    /// ```
+    #[unstable(feature = "path_as_mut_os_str", issue = "105021")]
+    #[must_use]
+    #[inline]
+    pub fn as_mut_os_str(&mut self) -> &mut OsStr {
+        &mut self.inner
+    }
+
     /// Yields a [`&str`] slice if the `Path` is valid unicode.
     ///
     /// This conversion may entail doing a check for UTF-8 validity.