From 22dc0fe6c74e29cc878025979896616ea70b9aec Mon Sep 17 00:00:00 2001
From: rvcas <x@rvcas.dev>
Date: Tue, 15 Jun 2021 19:20:15 -0400
Subject: [PATCH] feat: implement shallow clone for PExpected

---
 editor/src/lang/pool.rs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/editor/src/lang/pool.rs b/editor/src/lang/pool.rs
index 975d2b2655..1d77814b46 100644
--- a/editor/src/lang/pool.rs
+++ b/editor/src/lang/pool.rs
@@ -12,6 +12,7 @@
 /// This is important for performance.
 use libc::{c_void, MAP_ANONYMOUS, MAP_PRIVATE, PROT_READ, PROT_WRITE};
 use roc_can::expected::Expected;
+use roc_can::expected::PExpected;
 use std::cmp::Ordering;
 use std::marker::PhantomData;
 use std::mem::size_of;
@@ -620,3 +621,14 @@ impl<T: ShallowClone> ShallowClone for Expected<T> {
         }
     }
 }
+
+impl<T: ShallowClone> ShallowClone for PExpected<T> {
+    fn shallow_clone(&self) -> Self {
+        use PExpected::*;
+
+        match self {
+            NoExpectation(t) => NoExpectation(t.shallow_clone()),
+            ForReason(reason, t, region) => ForReason(reason.clone(), t.shallow_clone(), *region),
+        }
+    }
+}