From 9493267c1031144c7e81262918d32743ec323818 Mon Sep 17 00:00:00 2001
From: Nathan Froyd <froydnj@gmail.com>
Date: Sat, 1 Nov 2025 14:36:39 -0400
Subject: [PATCH 1/3] [rust] add `size` function for `NodeList`

---
 rust/ruby-prism/src/lib.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/rust/ruby-prism/src/lib.rs b/rust/ruby-prism/src/lib.rs
index b46121f602..684a8b6aca 100644
--- a/rust/ruby-prism/src/lib.rs
+++ b/rust/ruby-prism/src/lib.rs
@@ -149,6 +149,12 @@ impl<'pr> NodeList<'pr> {
             marker: PhantomData,
         }
     }
+
+    /// Returns the size of the list.
+    #[must_use]
+    pub const fn size(&self) -> usize {
+        unsafe { self.pointer.as_ref().size }
+    }
 }
 
 impl<'pr> IntoIterator for &NodeList<'pr> {
@@ -795,6 +801,7 @@ mod tests {
         let result = parse(source.as_ref());
 
         let node = result.node();
+        assert_eq!(node.as_program_node().unwrap().statements().body().size(), 1);
         let module = node.as_program_node().unwrap().statements().body().iter().next().unwrap();
         let module = module.as_module_node().unwrap();
         let locals = module.locals().iter().collect::<Vec<_>>();

From a7f76cf546ebda1e9b4984176e5a7da04c9b032e Mon Sep 17 00:00:00 2001
From: Nathan Froyd <froydnj@gmail.com>
Date: Sat, 1 Nov 2025 20:49:08 -0400
Subject: [PATCH 2/3] oops, we should call it `len`

---
 rust/ruby-prism/src/lib.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/rust/ruby-prism/src/lib.rs b/rust/ruby-prism/src/lib.rs
index 684a8b6aca..dd3dce1c4b 100644
--- a/rust/ruby-prism/src/lib.rs
+++ b/rust/ruby-prism/src/lib.rs
@@ -150,9 +150,9 @@ impl<'pr> NodeList<'pr> {
         }
     }
 
-    /// Returns the size of the list.
+    /// Returns the length of the list.
     #[must_use]
-    pub const fn size(&self) -> usize {
+    pub const fn len(&self) -> usize {
         unsafe { self.pointer.as_ref().size }
     }
 }
@@ -801,7 +801,7 @@ mod tests {
         let result = parse(source.as_ref());
 
         let node = result.node();
-        assert_eq!(node.as_program_node().unwrap().statements().body().size(), 1);
+        assert_eq!(node.as_program_node().unwrap().statements().body().len(), 1);
         let module = node.as_program_node().unwrap().statements().body().iter().next().unwrap();
         let module = module.as_module_node().unwrap();
         let locals = module.locals().iter().collect::<Vec<_>>();

From 32d4ab0ee8d6aa66af2ec7904c015634c6a9d5c9 Mon Sep 17 00:00:00 2001
From: Nathan Froyd <froydnj@gmail.com>
Date: Sat, 1 Nov 2025 20:55:06 -0400
Subject: [PATCH 3/3] clippy wants `is_empty` to exist as well

---
 rust/ruby-prism/src/lib.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/rust/ruby-prism/src/lib.rs b/rust/ruby-prism/src/lib.rs
index dd3dce1c4b..34e1517be2 100644
--- a/rust/ruby-prism/src/lib.rs
+++ b/rust/ruby-prism/src/lib.rs
@@ -155,6 +155,12 @@ impl<'pr> NodeList<'pr> {
     pub const fn len(&self) -> usize {
         unsafe { self.pointer.as_ref().size }
     }
+
+    /// Returns whether the list is empty.
+    #[must_use]
+    pub const fn is_empty(&self) -> bool {
+        self.len() == 0
+    }
 }
 
 impl<'pr> IntoIterator for &NodeList<'pr> {
@@ -802,6 +808,7 @@ mod tests {
 
         let node = result.node();
         assert_eq!(node.as_program_node().unwrap().statements().body().len(), 1);
+        assert!(!node.as_program_node().unwrap().statements().body().is_empty());
         let module = node.as_program_node().unwrap().statements().body().iter().next().unwrap();
         let module = module.as_module_node().unwrap();
         let locals = module.locals().iter().collect::<Vec<_>>();