Rollup merge of #22351 - blaenk:path-hash, r=huonw

 `PathBuf` does implement `Hash`, but `Path` doesn't. This makes it
annoying if you have a `HashMap` with `PathBuf`s as keys, because
it means you have to convert a `Path` into a `PathBuf` and get a
reference to it simply to perform operations on the `HashMap`!

1 files changed, 1 insertions, 0 deletions

diff --git a/src/libstd/path.rs b/src/libstd/path.rs
index 271a4cdb629..1f6d39fb1b3 100755
--- a/src/libstd/path.rs
+++ b/src/libstd/path.rs
@@ -1033,6 +1033,7 @@ impl AsOsStr for PathBuf {
 /// let parent_dir = path.parent();
 /// ```
 ///
+#[derive(Hash)]
 pub struct Path {
     inner: OsStr
 }