From 7a07a8f761eec3da533c52f718bb79a797c1622c Mon Sep 17 00:00:00 2001
From: Boxy <supbscripter@gmail.com>
Date: Tue, 27 Sep 2022 18:48:25 +0000
Subject: [PATCH] add `Res::clone` (#4109)

# Objective
Make `Res` cloneable
## Solution
Add an associated fn `clone(self: &Self) -. Self` instead of `Copy + Clone` trait impls to avoid `res.clone()` failing to clone out the underlying `T`
---
 crates/bevy_ecs/src/system/system_param.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/crates/bevy_ecs/src/system/system_param.rs b/crates/bevy_ecs/src/system/system_param.rs
index 01f317e3ed6b7..6f57b2dd0e4a6 100644
--- a/crates/bevy_ecs/src/system/system_param.rs
+++ b/crates/bevy_ecs/src/system/system_param.rs
@@ -291,6 +291,17 @@ where
 }
 
 impl<'w, T: Resource> Res<'w, T> {
+    // no it shouldn't clippy
+    #[allow(clippy::should_implement_trait)]
+    pub fn clone(this: &Self) -> Self {
+        Self {
+            value: this.value,
+            ticks: this.ticks,
+            last_change_tick: this.last_change_tick,
+            change_tick: this.change_tick,
+        }
+    }
+
     /// Returns `true` if the resource was added after the system last ran.
     pub fn is_added(&self) -> bool {
         self.ticks.is_added(self.last_change_tick, self.change_tick)