fix Exit; document Size

dizzle

@@ -1 +1 @@
-Subproject commit 2dbf9d8797a3642f69813be4ef3613836e061b94
+Subproject commit 4da276af7be5690f0a7a763de3710433a9700c3c

src/exit.rs

@@ -4,7 +4,7 @@ use crate::Usually;
 #[derive(Clone)] pub struct Exit(Arc<AtomicBool>);
 
 impl Exit {
-    pub fn run <T> (run: impl Fn(Self)->Usually<T>) -> Usually<T> {
+    pub fn run <T> (run: impl FnOnce(Self)->Usually<T>) -> Usually<T> {
         run(Self(Arc::new(AtomicBool::new(false))))
     }
 }

src/space/size.rs

@@ -3,7 +3,12 @@ use super::*;
 /// Uses [AtomicUsize] to measure size during\
 /// rendering (which is normally read-only).
 #[derive(Default, Debug, Clone)]
-pub struct Size(Arc<AtomicUsize>, Arc<AtomicUsize>);
+pub struct Size(
+    /// Width
+    pub Arc<AtomicUsize>,
+    /// Height
+    pub Arc<AtomicUsize>,
+);
 
 impl PartialEq for Size {
     fn eq (&self, _: &Self) -> bool {
@@ -31,4 +36,3 @@ impl Size {
         })
     }
 }
-