Merge #10001

10001: Sort enum variant r=Veykril a=vsrs

A small fix to the problem noted by `@lnicola` :

> ![sort-fields](https://user-images.githubusercontent.com/308347/129513196-4ffc7937-be58-44d4-9ec7-ba8745dcb460.gif)
> 
> (note the slight inconsistency here: to sort the variants of `Animal` I have to select the enum name, but to sort the fields of `Cat` I have to select the fields themselves)



Co-authored-by: vsrs <vit@conrlab.com>

crates/ide_assists/src/handlers/sort_items.rs

@@ -92,15 +92,11 @@ pub(crate) fn sort_items(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
     } else if let Some(impl_ast) = ctx.find_node_at_offset::<ast::Impl>() {
         add_sort_methods_assist(acc, impl_ast.assoc_item_list()?)
     } else if let Some(struct_ast) = ctx.find_node_at_offset::<ast::Struct>() {
-        match struct_ast.field_list() {
-            Some(ast::FieldList::RecordFieldList(it)) => add_sort_fields_assist(acc, it),
-            _ => {
-                cov_mark::hit!(not_applicable_if_sorted_or_empty_or_single);
-                None
-            }
-        }
+        add_sort_field_list_assist(acc, struct_ast.field_list())
     } else if let Some(union_ast) = ctx.find_node_at_offset::<ast::Union>() {
         add_sort_fields_assist(acc, union_ast.record_field_list()?)
+    } else if let Some(variant_ast) = ctx.find_node_at_offset::<ast::Variant>() {
+        add_sort_field_list_assist(acc, variant_ast.field_list())
     } else if let Some(enum_struct_variant_ast) = ctx.find_node_at_offset::<ast::RecordFieldList>()
     {
         // should be above enum and below struct
@@ -140,6 +136,16 @@ impl AddRewrite for Assists {
     }
 }
 
+fn add_sort_field_list_assist(acc: &mut Assists, field_list: Option<ast::FieldList>) -> Option<()> {
+    match field_list {
+        Some(ast::FieldList::RecordFieldList(it)) => add_sort_fields_assist(acc, it),
+        _ => {
+            cov_mark::hit!(not_applicable_if_sorted_or_empty_or_single);
+            None
+        }
+    }
+}
+
 fn add_sort_methods_assist(acc: &mut Assists, item_list: ast::AssocItemList) -> Option<()> {
     let methods = get_methods(&item_list);
     let sorted = sort_by_name(&methods);
@@ -541,7 +547,7 @@ enum Bar {
     }
 
     #[test]
-    fn sort_struct_enum_variant() {
+    fn sort_struct_enum_variant_fields() {
         check_assist(
             sort_items,
             r#"
@@ -558,6 +564,23 @@ enum Bar {
     b = 14,
     a,
     c(u32, usize),
+}
+        "#,
+        )
+    }
+
+    #[test]
+    fn sort_struct_enum_variant() {
+        check_assist(
+            sort_items,
+            r#"
+enum Bar {
+    $0d$0{ second: usize, first: u32 },
+}
+        "#,
+            r#"
+enum Bar {
+    d{ first: u32, second: usize },
 }
         "#,
         )