feat(versioned): Emit generics in plain From impl (#1284)

* feat(versioned): Emit generics in plain From impl

* test(versioned): Add snapshot test for generics

Author: Techassi

crates/stackable-versioned-macros/src/codegen/container/struct/mod.rs

@@ -478,6 +478,8 @@ impl Struct {
     ) -> TokenStream {
         // TODO (@Techassi): A bunch this stuff is duplicated in self.generate_tracking_from_impl.
         // Ideally we remove that duplication.
+        let (impl_generics, type_generics, where_clause) = self.generics.split_for_impl();
+
         let from_struct_ident = &self.common.idents.parameter;
         let struct_ident = &self.common.idents.original;
 
@@ -521,8 +523,12 @@ impl Struct {
         quote! {
             #automatically_derived
             #allow_attribute
-            impl ::core::convert::From<#from_module_ident::#struct_ident> for #for_module_ident::#struct_ident {
-                fn from(#from_struct_ident: #from_module_ident::#struct_ident) -> Self {
+            impl #impl_generics
+                ::core::convert::From<#from_module_ident::#struct_ident #type_generics>
+                for #for_module_ident::#struct_ident #type_generics
+            #where_clause
+            {
+                fn from(#from_struct_ident: #from_module_ident::#struct_ident #type_generics) -> Self {
                     Self {
                         #fields
                     }

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

@@ -0,0 +1,16 @@
+use stackable_versioned::versioned;
+// ---
+#[versioned(version(name = "v1alpha1"), version(name = "v1alpha2"))]
+// ---
+pub(crate) mod versioned {
+    struct FooSpec<Bar, Baz>
+    where
+        Bar: Default,
+        Baz: Clone,
+    {
+        bar: Bar,
+        baz: Baz,
+    }
+}
+// ---
+fn main() {}

crates/stackable-versioned-macros/tests/snapshots/stackable_versioned_macros__snapshots__pass@generics.rs.snap

@@ -28,6 +28,7 @@ mod inputs {
         // mod docs;
         // mod downgrade_with;
         // mod enum_fields;
+        // mod generics;
         // mod module;
         // mod module_preserve;
         // mod renamed_field;