feat(engine-reflection): add try_get_len fn to slice reflection

1 files changed, 6 insertions, 0 deletions

diff --git a/engine-reflection/src/lib.rs b/engine-reflection/src/lib.rs
index d9e2c72..76dc71d 100644
--- a/engine-reflection/src/lib.rs
+++ b/engine-reflection/src/lib.rs
@@ -313,6 +313,7 @@ pub struct Slice
     pub item_layout: Layout,
     pub get_item_type_name: FnWithDebug<&'static str>,
     pub try_get_item: fn(target: &dyn Any, index: usize) -> Result<&dyn Any, GetError>,
+    pub try_get_len: fn(target: &dyn Any) -> Option<usize>,
 }
 
 impl Slice
@@ -477,6 +478,11 @@ unsafe impl<T: Reflection> Reflection for &'static [T]
 
             Ok(item)
         },
+        try_get_len: |target| {
+            let target = target.downcast_ref::<Self>()?;
+
+            Some(target.len())
+        },
     });
 }