Add on_unimplemented Diagnostics to Most Public Traits

crates/bevy_reflect/src/from_reflect.rs

@@ -21,7 +21,10 @@ use crate::{FromType, Reflect};
 /// [derive macro]: bevy_reflect_derive::FromReflect
 /// [`DynamicStruct`]: crate::DynamicStruct
 /// [crate-level documentation]: crate
-#[diagnostic::on_unimplemented(message = "`{Self}` can not be created from a reflection")]
+#[diagnostic::on_unimplemented(
+    message = "`{Self}` can not be created from a reflection",
+    note = "consider annotating `{Self}` with `#[derive(FromReflect)]`"
+)]
 pub trait FromReflect: Reflect + Sized {
     /// Constructs a concrete instance of `Self` from a reflected value.
     fn from_reflect(reflect: &dyn Reflect) -> Option<Self>;

crates/bevy_reflect/src/path/mod.rs

@@ -44,10 +44,6 @@ impl<'a> From<AccessError<'a>> for ReflectPathError<'a> {
 }
 
 /// Something that can be interpreted as a reflection path in [`GetPath`].
-#[diagnostic::on_unimplemented(
-    message = "`{Self}` is not a reflection path",
-    label = "invalid path"
-)]
 pub trait ReflectPath<'a>: Sized {
     /// Gets a reference to the specified element on the given [`Reflect`] object.
     ///

crates/bevy_reflect/src/type_info.rs

@@ -70,7 +70,10 @@ use std::fmt::Debug;
 /// ```
 ///
 /// [utility]: crate::utility
-#[diagnostic::on_unimplemented(message = "`{Self}` can not be typed through reflection")]
+#[diagnostic::on_unimplemented(
+    message = "`{Self}` can not be typed through reflection",
+    note = "consider annotating `{Self}` with `#[derive(Reflect)]`"
+)]
 pub trait Typed: Reflect + TypePath {
     /// Returns the compile-time [info] for the underlying type.
     ///

crates/bevy_reflect/src/type_path.rs

@@ -82,7 +82,7 @@ use std::fmt;
 #[diagnostic::on_unimplemented(
     message = "`{Self}` does not have a type path",
     label = "invalid type",
-    note = "consider annotating `{Self}` with `#[derive(TypePath)]`"
+    note = "consider annotating `{Self}` with `#[derive(Reflect)]` or `#[derive(TypePath)]`"
 )]
 pub trait TypePath: 'static {
     /// Returns the fully qualified path of the underlying type.
@@ -136,7 +136,8 @@ pub trait TypePath: 'static {
 /// [`Reflect`]: crate::Reflect
 #[diagnostic::on_unimplemented(
     message = "`{Self}` can not be used as a dynamic type path",
-    label = "invalid type"
+    label = "invalid type",
+    note = "consider annotating `{Self}` with `#[derive(Reflect)]` or `#[derive(TypePath)]`"
 )]
 pub trait DynamicTypePath {
     /// See [`TypePath::type_path`].