From b2cb752c82581e4f9c8200660be32f8a17c56329 Mon Sep 17 00:00:00 2001
From: cksac <cs.cksac@gmail.com>
Date: Fri, 9 Feb 2024 09:05:05 +0800
Subject: [PATCH] add cow

---
 fake/src/impls/std/container.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/fake/src/impls/std/container.rs b/fake/src/impls/std/container.rs
index f18151e..b87fa7e 100644
--- a/fake/src/impls/std/container.rs
+++ b/fake/src/impls/std/container.rs
@@ -1,5 +1,6 @@
 use crate::Dummy;
 use rand::Rng;
+use std::borrow::Cow;
 use std::cell::{Cell, RefCell};
 use std::ops::Deref;
 use std::pin::Pin;
@@ -36,3 +37,12 @@ where
         Pin::new(T::dummy_with_rng(config, rng))
     }
 }
+
+impl<'a, T, U> Dummy<U> for Cow<'a, T>
+where
+    T: Dummy<U> + Clone,
+{
+    fn dummy_with_rng<R: Rng + ?Sized>(config: &U, rng: &mut R) -> Self {
+        Cow::Owned(T::dummy_with_rng(config, rng))
+    }
+}