From da2ca01ebaaaaa47aa09c5848c53b145a68af8fa Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Thu, 14 Nov 2019 10:30:30 +0300
Subject: Handle macro-generated expressions slightly less wrong

---
 crates/ra_hir_expand/src/lib.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'crates/ra_hir_expand/src')

diff --git a/crates/ra_hir_expand/src/lib.rs b/crates/ra_hir_expand/src/lib.rs
index c6ffa2c6f..930789b0f 100644
--- a/crates/ra_hir_expand/src/lib.rs
+++ b/crates/ra_hir_expand/src/lib.rs
@@ -223,7 +223,7 @@ impl<N: AstNode> AstId<N> {
     }
 }
 
-#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[derive(Debug, PartialEq, Eq, Clone, Copy, Hash)]
 pub struct Source<T> {
     pub file_id: HirFileId,
     pub ast: T,
@@ -233,6 +233,9 @@ impl<T> Source<T> {
     pub fn map<F: FnOnce(T) -> U, U>(self, f: F) -> Source<U> {
         Source { file_id: self.file_id, ast: f(self.ast) }
     }
+    pub fn as_ref(&self) -> Source<&T> {
+        Source { file_id: self.file_id, ast: &self.ast }
+    }
     pub fn file_syntax(&self, db: &impl db::AstDatabase) -> SyntaxNode {
         db.parse_or_expand(self.file_id).expect("source created from invalid file")
     }
-- 
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