From 7ea868bd0835fc0572a0c34ae1a76bba900733db Mon Sep 17 00:00:00 2001
From: Evan Almloff <evanalmloff@gmail.com>
Date: Wed, 11 Oct 2023 12:46:53 -0500
Subject: [PATCH] add a map method to signal

---
 packages/signals/src/signal.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/packages/signals/src/signal.rs b/packages/signals/src/signal.rs
index c1ae076d9..567534ec5 100644
--- a/packages/signals/src/signal.rs
+++ b/packages/signals/src/signal.rs
@@ -1,3 +1,4 @@
+use crate::SignalMap;
 use std::{
     cell::{Ref, RefCell, RefMut},
     ops::{Deref, DerefMut},
@@ -252,6 +253,11 @@ impl<T: 'static> Signal<T> {
         let mut write = self.write();
         f(&mut *write)
     }
+
+    /// Map the signal to a new type.
+    pub fn map<O>(self, f: fn(&T) -> &O) -> SignalMap<T, O> {
+        SignalMap::new(self, f)
+    }
 }
 
 impl<T: Clone + 'static> Signal<T> {