(trait expment)

Author: Bromeon

godot-core/src/meta/traits.rs

@@ -7,7 +7,6 @@
 
 use godot_ffi as sys;
 
-use crate::builtin;
 use crate::builtin::{Variant, VariantType};
 use crate::global::PropertyUsageFlags;
 use crate::meta::error::ConvertError;
@@ -16,6 +15,7 @@ use crate::meta::{
 };
 use crate::registry::method::MethodParamOrReturnInfo;
 use crate::registry::property::builtin_type_string;
+use crate::{builtin, meta};
 
 // Re-export sys traits in this module, so all are in one place.
 #[rustfmt::skip] // Do not reorder.
@@ -213,6 +213,25 @@ pub trait ArrayElement: ToGodot + FromGodot + sealed::Sealed + 'static {
     }
 }
 
+pub trait ElementLiteral {
+    type Element;
+    fn to_element(&self) -> Self::Element;
+}
+
+impl<T> ElementLiteral for T
+where
+    T: ToGodot<Pass = meta::ByValue> + Copy,
+{
+    type Element = T;
+    fn to_element(&self) -> Self::Element {
+        *self
+    }
+}
+
+pub fn elem<T: ElementLiteral>(element: &T) -> T::Element {
+    element.to_element()
+}
+
 // ----------------------------------------------------------------------------------------------------------------------------------------------
 // Non-polymorphic helper functions, to avoid constant `<T::Via as GodotType>::` in the code.