Merge #4346

4346: Fix rename of enum variant visible from module r=matklad a=montekki

Probably fixes #4237 

It looks like the ref is found correctly in this case but it's visibility is not correctly determined. I took a stab at fixing that by adding an implementation of `HasVisibility` for `EnumVariant` so it works more or less the same way it does for struct fields.

In other words, the `search_range` here does not contain the ref since it's not considered visible:

efd8e34c39/crates/ra_ide_db/src/search.rs (L209-L214)


Before that I tried to populate `ItemScope` with visible enum variants but that ended up with breaking tests all over the place and also it looked illogical in the end: `ItemScope` is not populated with, say, public struct fields and the same should be true for `enum` variants.

I've added two more or less identical tests: one for the case with a struct field rename and one for enum variant rename; the test for struct should probably be removed and the names should be changed.


Co-authored-by: Fedor Sakharov <fedor.sakharov@gmail.com>

crates/ra_ide/src/references/rename.rs

@@ -712,6 +712,68 @@ mod tests {
         "###);
     }
 
+    #[test]
+    fn test_enum_variant_from_module_1() {
+        test_rename(
+            r#"
+    mod foo {
+        pub enum Foo {
+            Bar<|>,
+        }
+    }
+
+    fn func(f: foo::Foo) {
+        match f {
+            foo::Foo::Bar => {}
+        }
+    }
+    "#,
+            "Baz",
+            r#"
+    mod foo {
+        pub enum Foo {
+            Baz,
+        }
+    }
+
+    fn func(f: foo::Foo) {
+        match f {
+            foo::Foo::Baz => {}
+        }
+    }
+    "#,
+        );
+    }
+
+    #[test]
+    fn test_enum_variant_from_module_2() {
+        test_rename(
+            r#"
+    mod foo {
+        pub struct Foo {
+            pub bar<|>: uint,
+        }
+    }
+
+    fn foo(f: foo::Foo) {
+        let _ = f.bar;
+    }
+    "#,
+            "baz",
+            r#"
+    mod foo {
+        pub struct Foo {
+            pub baz: uint,
+        }
+    }
+
+    fn foo(f: foo::Foo) {
+        let _ = f.baz;
+    }
+    "#,
+        );
+    }
+
     fn test_rename(text: &str, new_name: &str, expected: &str) {
         let (analysis, position) = single_file_with_position(text);
         let source_change = analysis.rename(position, new_name).unwrap();

crates/ra_ide_db/src/defs.rs

@@ -6,7 +6,7 @@
 // FIXME: this badly needs rename/rewrite (matklad, 2020-02-06).
 
 use hir::{
-    Field, HasVisibility, ImplDef, Local, MacroDef, Module, ModuleDef, Name, PathResolution,
+    Adt, Field, HasVisibility, ImplDef, Local, MacroDef, Module, ModuleDef, Name, PathResolution,
     Semantics, TypeParam, Visibility,
 };
 use ra_prof::profile;
@@ -47,7 +47,13 @@ impl Definition {
         match self {
             Definition::Macro(_) => None,
             Definition::Field(sf) => Some(sf.visibility(db)),
-            Definition::ModuleDef(def) => module?.visibility_of(db, def),
+            Definition::ModuleDef(def) => match def {
+                ModuleDef::EnumVariant(id) => {
+                    let parent = id.parent_enum(db);
+                    module?.visibility_of(db, &ModuleDef::Adt(Adt::Enum(parent)))
+                }
+                _ => module?.visibility_of(db, def),
+            },
             Definition::SelfType(_) => None,
             Definition::Local(_) => None,
             Definition::TypeParam(_) => None,