feat(engine): add immutable try_get* fns to reflection

2 files changed, 41 insertions, 0 deletions

diff --git a/engine-macros/src/reflection/enum_impl.rs b/engine-macros/src/reflection/enum_impl.rs
index 37abc34..14d91a7 100644
--- a/engine-macros/src/reflection/enum_impl.rs
+++ b/engine-macros/src/reflection/enum_impl.rs
@@ -352,6 +352,29 @@ fn generate_variants<'a>(
 
                     Ok(())
                 },
+                try_get_field: |target, field_index| { {
+                    #![allow(unreachable_code)]
+
+                    use std::any::Any;
+                    use #engine_crate_path::reflection::GetError;
+
+                    let target = target
+                        .downcast_ref::<Self>()
+                        .ok_or(GetError::WrongTargetType)?;
+
+                    let #variant_pattern = target else {
+                        return Err(GetError::WrongTargetEnumVariant);
+                    };
+
+                    let field: &dyn Any = match field_index {
+                        #field_index_match_arms
+                        _ => {
+                            return Err(GetError::IndexOutOfBounds);
+                        }
+                    };
+
+                    Ok(field)
+                } },
                 try_get_field_mut: |target, field_index| { {
                     #![allow(unreachable_code)]
 
diff --git a/engine-macros/src/reflection/struct_impl.rs b/engine-macros/src/reflection/struct_impl.rs
index 1cd9fb8..0ba426d 100644
--- a/engine-macros/src/reflection/struct_impl.rs
+++ b/engine-macros/src/reflection/struct_impl.rs
@@ -142,6 +142,24 @@ fn gen_impl(
                                 #get_default_value_fn
                             },
                             cast_dyn_any: |ptr| ptr.cast::<Self>(),
+                            try_get_field: |target, field_index| { {
+                                #![allow(unreachable_code)]
+
+                                let target = target
+                                    .downcast_ref::<Self>()
+                                    .ok_or(GetError::WrongTargetType)?;
+
+                                let #struct_pattern = target;
+
+                                let field: &dyn Any = match field_index {
+                                    #field_index_match_arms
+                                    _ => {
+                                        return Err(GetError::IndexOutOfBounds);
+                                    }
+                                };
+
+                                Ok(field)
+                            } },
                             try_get_field_mut: |target, field_index| { {
                                 #![allow(unreachable_code)]