From ecc5242463308c16f38dbd5015b9f264f990b76a Mon Sep 17 00:00:00 2001
From: Nadrieril
Date: Tue, 3 Nov 2020 20:35:22 +0000
Subject: Remove NirInternal

---
 dhall/src/semantics/nze/lazy.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'dhall/src/semantics/nze/lazy.rs')

diff --git a/dhall/src/semantics/nze/lazy.rs b/dhall/src/semantics/nze/lazy.rs
index 550f69a..d3b5c8d 100644
--- a/dhall/src/semantics/nze/lazy.rs
+++ b/dhall/src/semantics/nze/lazy.rs
@@ -63,6 +63,17 @@ where
     }
 }
 
+/// This implementation evaluates before cloning, because we can't clone the contents of a `Cell`.
+impl<Src, Tgt> Clone for Lazy<Src, Tgt>
+where
+    Src: Eval<Tgt>,
+    Tgt: Clone,
+{
+    fn clone(&self) -> Self {
+        Self::new_completed(self.force().clone())
+    }
+}
+
 impl<Src, Tgt> Debug for Lazy<Src, Tgt>
 where
     Tgt: Debug,
-- 
cgit v1.2.3