feat(versioned): Add "map" hint

crates/stackable-versioned-macros/src/attrs/item/field.rs

@@ -92,4 +92,5 @@ impl FieldAttributes {
 pub enum Hint {
     Option,
     Vec,
+    Map,
 }

crates/stackable-versioned-macros/src/codegen/item/field.rs

@@ -442,6 +442,9 @@ impl VersionedField {
                 Hint::Vec => {
                     quote! { into_iter().map(|v| v.tracking_into(status, &#json_path_ident)).collect() }
                 }
+                Hint::Map => {
+                    quote! { into_iter().map(|(k, v)| (k, v.tracking_into(status, &#json_path_ident))).collect() }
+                }
             }
         } else {
             quote! { tracking_into(status, &#json_path_ident) }
@@ -454,6 +457,7 @@ impl VersionedField {
             match hint {
                 Hint::Option => quote! { map(Into::into) },
                 Hint::Vec => quote! { into_iter().map(Into::into).collect() },
+                Hint::Map => quote! { into_iter().map(|(k, v)| (k, v.into())).collect() },
             }
         } else {
             quote! { into() }

crates/stackable-versioned-macros/tests/inputs/pass/hint_map.rs

@@ -0,0 +1,31 @@
+use std::collections::HashMap;
+
+use stackable_versioned::versioned;
+// ---
+#[versioned(version(name = "v1alpha1"), version(name = "v1alpha2"))]
+// ---
+pub(crate) mod versioned {
+    pub(crate) struct Foo {
+        #[versioned(
+            changed(since = "v1alpha2", from_type = "HashMap<String, u8>"),
+            hint(map)
+        )]
+        bar: HashMap<String, Bar>,
+    }
+}
+// ---
+struct Bar(u8);
+
+impl From<u8> for Bar {
+    fn from(value: u8) -> Self {
+        Self(value)
+    }
+}
+
+impl From<Bar> for u8 {
+    fn from(value: Bar) -> Self {
+        value.0
+    }
+}
+
+fn main() {}

crates/stackable-versioned-macros/tests/trybuild.rs

@@ -29,6 +29,7 @@ mod inputs {
         // mod downgrade_with;
         // mod enum_fields;
         // mod generics;
+        // mod hint_map;
         // mod module;
         // mod module_preserve;
         // mod renamed_field;