feat: soa_attr for Ref/RefMut's field

Author: CurryPseudo

soa-derive-internal/src/refs.rs

@@ -34,6 +34,12 @@ pub fn derive(input: &Input) -> TokenStream {
                                      .map(|field| format!("A mutable reference to a `{0}` from a [`{1}`](struct.{1}.html)", field, vec_name))
                                      .collect::<Vec<_>>();
 
+    let field_attrs = input.field_attrs.iter()
+        .map(|attr| &attr.ref_).collect::<Vec<_>>();
+
+    let mut_field_attrs = input.field_attrs.iter()
+        .map(|attr| &attr.ref_mut).collect::<Vec<_>>();
+
     quote! {
         /// A reference to a
         #[doc = #doc_url]
@@ -43,6 +49,7 @@ pub fn derive(input: &Input) -> TokenStream {
         #visibility struct #ref_name<'a> {
             #(
                 #[doc = #fields_doc]
+                #(#[#field_attrs])*
                 pub #fields_names_1: &'a #fields_types,
             )*
         }
@@ -54,6 +61,7 @@ pub fn derive(input: &Input) -> TokenStream {
         #visibility struct #ref_mut_name<'a> {
             #(
                 #[doc = #fields_mut_doc]
+                #(#[#mut_field_attrs])*
                 pub #fields_names_1: &'a mut #fields_types,
             )*
         }

tests/soa_attr.rs

@@ -31,10 +31,12 @@ fn eq_test() {
 #[soa_derive(PartialEq, Debug, Serialize, Deserialize)]
 pub struct Point {
     #[soa_attr(Slice, deprecated)]
+    #[soa_attr(RefMut, deprecated)]
     pub x: f32,
     #[soa_attr(SliceMut, deprecated)]
     pub y: f32,
     #[soa_attr(Vec, serde(skip))]
+    #[soa_attr(Ref, deprecated)]
     pub meta: bool
 }
 
@@ -53,16 +55,27 @@ fn serde_skip_test() -> Result<(), serde_json::Error> {
         y: vec![2.0, 4.0],
         meta: vec![]
     });
+
     {
         let slice = soa.as_slice();
         let _ = slice.x[0]; // Should have a deprecate warning
         let _ = slice.y[0]; // Should not have a deprecate warning
+        let _ = slice.meta[0]; // Should not have a deprecate warning
+
+        let ref_ = slice.get(1).unwrap();
+        let _ = ref_.x; // Should not have a deprecate warning
+        let _ = ref_.y; // Should not have a deprecate warning
+        let _ = ref_.meta; // Should have a deprecate warning
     }
     {
-        let slice = soa.as_mut_slice();
+        let mut slice = soa.as_mut_slice();
         let _ = slice.y[0]; // Should have a deprecate warning
         let _ = slice.x[0]; // Should not have a deprecate warning
 
+        let ref_mut = slice.get_mut(1).unwrap();
+        let _ = ref_mut.x; // Should have a deprecate warning
+        let _ = ref_mut.y; // Should not have a deprecate warning
+        let _ = ref_mut.meta; // Should not have a deprecate warning
     }
     Ok(())
 }