From 8b0298ce095b6dd635f7ed35dc97f1874157040b Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Mon, 27 Aug 2018 10:01:31 +0300
Subject: scopes

---
 crates/libsyntax2/src/yellow/mod.rs    |  2 +-
 crates/libsyntax2/src/yellow/syntax.rs | 10 +++++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

(limited to 'crates/libsyntax2/src/yellow')

diff --git a/crates/libsyntax2/src/yellow/mod.rs b/crates/libsyntax2/src/yellow/mod.rs
index 3c4510fe7..b94c794fe 100644
--- a/crates/libsyntax2/src/yellow/mod.rs
+++ b/crates/libsyntax2/src/yellow/mod.rs
@@ -66,7 +66,7 @@ impl SyntaxRoot {
     }
 }
 
-#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+#[derive(Clone, Copy, PartialEq, Eq, Debug, Hash)]
 pub(crate) struct RedPtr(ptr::NonNull<RedNode>);
 
 unsafe impl Send for RedPtr {}
diff --git a/crates/libsyntax2/src/yellow/syntax.rs b/crates/libsyntax2/src/yellow/syntax.rs
index 0045598d4..75b6cb7dc 100644
--- a/crates/libsyntax2/src/yellow/syntax.rs
+++ b/crates/libsyntax2/src/yellow/syntax.rs
@@ -1,4 +1,7 @@
-use std::{fmt, sync::Arc};
+use std::{
+    fmt, sync::Arc,
+    hash::{Hasher, Hash},
+};
 
 use smol_str::SmolStr;
 
@@ -27,6 +30,11 @@ impl<R1: TreeRoot, R2: TreeRoot> PartialEq<SyntaxNode<R1>> for SyntaxNode<R2> {
 }
 
 impl<R: TreeRoot> Eq for SyntaxNode<R> {}
+impl<R: TreeRoot> Hash for SyntaxNode<R> {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.red.hash(state)
+    }
+}
 
 pub type SyntaxNodeRef<'a> = SyntaxNode<RefRoot<'a>>;
 
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