From 5df2a92f28be1d53d32d5b42a6645459b7d78efe Mon Sep 17 00:00:00 2001
From: Héctor Ramón Jiménez <hector0193@gmail.com>
Date: Tue, 13 Jul 2021 21:15:07 +0200
Subject: Force `Application::Message` to implement `Clone`

A `Message` should represent an application event (e.g. user
interactions, command results, subscription results...). Therefore, it
should always consist of pure, cloneable data.
---
 native/src/program.rs   | 2 +-
 src/application.rs      | 2 +-
 src/sandbox.rs          | 2 +-
 winit/src/conversion.rs | 5 ++++-
 4 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/native/src/program.rs b/native/src/program.rs
index 066c29d8..75fab094 100644
--- a/native/src/program.rs
+++ b/native/src/program.rs
@@ -11,7 +11,7 @@ pub trait Program: Sized {
     type Renderer: Renderer;
 
     /// The type of __messages__ your [`Program`] will produce.
-    type Message: std::fmt::Debug + Send;
+    type Message: std::fmt::Debug + Clone + Send;
 
     /// The type of [`Clipboard`] your [`Program`] will use.
     type Clipboard: Clipboard;
diff --git a/src/application.rs b/src/application.rs
index b3dae1b3..42c28f99 100644
--- a/src/application.rs
+++ b/src/application.rs
@@ -99,7 +99,7 @@ pub trait Application: Sized {
     type Executor: Executor;
 
     /// The type of __messages__ your [`Application`] will produce.
-    type Message: std::fmt::Debug + Send;
+    type Message: std::fmt::Debug + Clone + Send;
 
     /// The data needed to initialize your [`Application`].
     type Flags;
diff --git a/src/sandbox.rs b/src/sandbox.rs
index 10b05a92..cb3cf624 100644
--- a/src/sandbox.rs
+++ b/src/sandbox.rs
@@ -88,7 +88,7 @@ use crate::{
 /// ```
 pub trait Sandbox {
     /// The type of __messages__ your [`Sandbox`] will produce.
-    type Message: std::fmt::Debug + Send;
+    type Message: std::fmt::Debug + Clone + Send;
 
     /// Initializes the [`Sandbox`].
     ///
diff --git a/winit/src/conversion.rs b/winit/src/conversion.rs
index 75419006..687a037e 100644
--- a/winit/src/conversion.rs
+++ b/winit/src/conversion.rs
@@ -223,7 +223,10 @@ pub fn menu<Message>(menu: &Menu<Message>) -> winit::window::Menu {
 pub fn menu_message<Message>(
     _menu: &Menu<Message>,
     id: isize,
-) -> Option<Message> {
+) -> Option<Message>
+where
+    Message: Clone,
+{
     println!("Menu entry activated: {}", id);
 
     None
-- 
cgit