util: WithLifetime type for tagging with a lifetime

crates/renderer/src/util.rs

@@ -1,4 +1,4 @@
-use std::ops::Deref;
+use std::ops::{Deref, DerefMut};
 
 use ash::vk;
 
@@ -391,3 +391,26 @@ pub fn image_aspect_from_format(format: vk::Format) -> vk::ImageAspectFlags {
         _ => ImageAspectFlags::COLOR,
     }
 }
+
+#[repr(transparent)]
+pub struct WithLifetime<'a, T>(T, std::marker::PhantomData<&'a ()>);
+
+impl<T> WithLifetime<'_, T> {
+    pub fn new(t: T) -> Self {
+        Self(t, std::marker::PhantomData)
+    }
+}
+
+impl<'a, T: 'a> Deref for WithLifetime<'a, T> {
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl<'a, T: 'a> DerefMut for WithLifetime<'a, T> {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}