From 200470692ff1023024f0d4a6c35deb43d3045f10 Mon Sep 17 00:00:00 2001
From: Phil Ellison <phil.j.ellison@gmail.com>
Date: Mon, 12 Aug 2019 20:39:11 +0100
Subject: Cast SyntaxNodePtr to AstPtr directly

---
 crates/ra_syntax/src/ptr.rs | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'crates/ra_syntax/src')

diff --git a/crates/ra_syntax/src/ptr.rs b/crates/ra_syntax/src/ptr.rs
index d24660ac3..992034ef0 100644
--- a/crates/ra_syntax/src/ptr.rs
+++ b/crates/ra_syntax/src/ptr.rs
@@ -31,6 +31,13 @@ impl SyntaxNodePtr {
     pub fn kind(self) -> SyntaxKind {
         self.kind
     }
+
+    pub fn cast<N: AstNode>(self) -> Option<AstPtr<N>> {
+        if !N::can_cast(self.kind()) {
+            return None;
+        }
+        Some(AstPtr { raw: self, _ty: PhantomData })
+    }
 }
 
 /// Like `SyntaxNodePtr`, but remembers the type of node
-- 
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