6 files changed, 195 insertions, 60 deletions

diff --git a/crates/assists/src/handlers/fix_visibility.rs b/crates/assists/src/handlers/fix_visibility.rs
index 7cd76ea06..d505e9444 100644
--- a/crates/assists/src/handlers/fix_visibility.rs
+++ b/crates/assists/src/handlers/fix_visibility.rs
@@ -324,14 +324,14 @@ pub struct Foo { pub bar: () }
 
     #[test]
     fn fix_visibility_of_enum_variant_field() {
-        check_assist(
+        // Enum variants, as well as their fields, always get the enum's visibility. In fact, rustc
+        // rejects any visibility specifiers on them, so this assist should never fire on them.
+        check_assist_not_applicable(
             fix_visibility,
             r"mod foo { pub enum Foo { Bar { bar: () } } }
               fn main() { foo::Foo::Bar { <|>bar: () }; } ",
-            r"mod foo { pub enum Foo { Bar { $0pub(crate) bar: () } } }
-              fn main() { foo::Foo::Bar { bar: () }; } ",
         );
-        check_assist(
+        check_assist_not_applicable(
             fix_visibility,
             r"
 //- /lib.rs
@@ -340,8 +340,6 @@ fn main() { foo::Foo::Bar { <|>bar: () }; }
 //- /foo.rs
 pub enum Foo { Bar { bar: () } }
 ",
-            r"pub enum Foo { Bar { $0pub(crate) bar: () } }
-",
         );
         check_assist_not_applicable(
             fix_visibility,
diff --git a/crates/hir/src/semantics/source_to_def.rs b/crates/hir/src/semantics/source_to_def.rs
index 5918b9541..66fc11611 100644
--- a/crates/hir/src/semantics/source_to_def.rs
+++ b/crates/hir/src/semantics/source_to_def.rs
@@ -189,6 +189,10 @@ impl SourceToDefCtx<'_, '_> {
                         let def = self.type_alias_to_def(container.with_value(it))?;
                         def.into()
                     },
+                    ast::Variant(it) => {
+                        let def = self.enum_variant_to_def(container.with_value(it))?;
+                        VariantId::from(def).into()
+                    },
                     _ => continue,
                 }
             };
diff --git a/crates/hir_def/src/adt.rs b/crates/hir_def/src/adt.rs
index d69ff2fc7..6539959c3 100644
--- a/crates/hir_def/src/adt.rs
+++ b/crates/hir_def/src/adt.rs
@@ -14,7 +14,7 @@ use tt::{Delimiter, DelimiterKind, Leaf, Subtree, TokenTree};
 use crate::{
     body::{CfgExpander, LowerCtx},
     db::DefDatabase,
-    item_tree::{AttrOwner, Field, Fields, ItemTree, ModItem},
+    item_tree::{AttrOwner, Field, Fields, ItemTree, ModItem, RawVisibilityId},
     src::HasChildSource,
     src::HasSource,
     trace::Trace,
@@ -91,7 +91,7 @@ impl StructData {
         let cfg_options = db.crate_graph()[loc.container.module(db).krate].cfg_options.clone();
 
         let strukt = &item_tree[loc.id.value];
-        let variant_data = lower_fields(&item_tree, &cfg_options, &strukt.fields);
+        let variant_data = lower_fields(&item_tree, &cfg_options, &strukt.fields, None);
         Arc::new(StructData {
             name: strukt.name.clone(),
             variant_data: Arc::new(variant_data),
@@ -105,7 +105,7 @@ impl StructData {
         let cfg_options = db.crate_graph()[loc.container.module(db).krate].cfg_options.clone();
 
         let union = &item_tree[loc.id.value];
-        let variant_data = lower_fields(&item_tree, &cfg_options, &union.fields);
+        let variant_data = lower_fields(&item_tree, &cfg_options, &union.fields, None);
 
         Arc::new(StructData {
             name: union.name.clone(),
@@ -126,7 +126,8 @@ impl EnumData {
         for var_id in enum_.variants.clone() {
             if item_tree.attrs(var_id.into()).is_cfg_enabled(&cfg_options) {
                 let var = &item_tree[var_id];
-                let var_data = lower_fields(&item_tree, &cfg_options, &var.fields);
+                let var_data =
+                    lower_fields(&item_tree, &cfg_options, &var.fields, Some(enum_.visibility));
 
                 variants.alloc(EnumVariantData {
                     name: var.name.clone(),
@@ -296,13 +297,18 @@ fn lower_struct(
     }
 }
 
-fn lower_fields(item_tree: &ItemTree, cfg_options: &CfgOptions, fields: &Fields) -> VariantData {
+fn lower_fields(
+    item_tree: &ItemTree,
+    cfg_options: &CfgOptions,
+    fields: &Fields,
+    override_visibility: Option<RawVisibilityId>,
+) -> VariantData {
     match fields {
         Fields::Record(flds) => {
             let mut arena = Arena::new();
             for field_id in flds.clone() {
                 if item_tree.attrs(field_id.into()).is_cfg_enabled(cfg_options) {
-                    arena.alloc(lower_field(item_tree, &item_tree[field_id]));
+                    arena.alloc(lower_field(item_tree, &item_tree[field_id], override_visibility));
                 }
             }
             VariantData::Record(arena)
@@ -311,7 +317,7 @@ fn lower_fields(item_tree: &ItemTree, cfg_options: &CfgOptions, fields: &Fields)
             let mut arena = Arena::new();
             for field_id in flds.clone() {
                 if item_tree.attrs(field_id.into()).is_cfg_enabled(cfg_options) {
-                    arena.alloc(lower_field(item_tree, &item_tree[field_id]));
+                    arena.alloc(lower_field(item_tree, &item_tree[field_id], override_visibility));
                 }
             }
             VariantData::Tuple(arena)
@@ -320,10 +326,14 @@ fn lower_fields(item_tree: &ItemTree, cfg_options: &CfgOptions, fields: &Fields)
     }
 }
 
-fn lower_field(item_tree: &ItemTree, field: &Field) -> FieldData {
+fn lower_field(
+    item_tree: &ItemTree,
+    field: &Field,
+    override_visibility: Option<RawVisibilityId>,
+) -> FieldData {
     FieldData {
         name: field.name.clone(),
         type_ref: field.type_ref.clone(),
-        visibility: item_tree[field.visibility].clone(),
+        visibility: item_tree[override_visibility.unwrap_or(field.visibility)].clone(),
     }
 }
diff --git a/crates/ide/src/references.rs b/crates/ide/src/references.rs
index e0830eb4f..9315f7354 100644
--- a/crates/ide/src/references.rs
+++ b/crates/ide/src/references.rs
@@ -406,6 +406,23 @@ enum Foo {
     }
 
     #[test]
+    fn test_find_all_refs_enum_var_field() {
+        check(
+            r#"
+enum Foo {
+    A,
+    B { field<|>: u8 },
+    C,
+}
+"#,
+            expect![[r#"
+                field RECORD_FIELD FileId(0) 26..35 26..31 Other
+
+            "#]],
+        );
+    }
+
+    #[test]
     fn test_find_all_refs_two_modules() {
         check(
             r#"
@@ -669,6 +686,76 @@ fn g() { f(); }
         );
     }
 
+    #[test]
+    fn test_find_all_refs_struct_pat() {
+        check(
+            r#"
+struct S {
+    field<|>: u8,
+}
+
+fn f(s: S) {
+    match s {
+        S { field } => {}
+    }
+}
+"#,
+            expect![[r#"
+                field RECORD_FIELD FileId(0) 15..24 15..20 Other
+
+                FileId(0) 68..73 FieldShorthandForField Read
+            "#]],
+        );
+    }
+
+    #[test]
+    fn test_find_all_refs_enum_var_pat() {
+        check(
+            r#"
+enum En {
+    Variant {
+        field<|>: u8,
+    }
+}
+
+fn f(e: En) {
+    match e {
+        En::Variant { field } => {}
+    }
+}
+"#,
+            expect![[r#"
+                field RECORD_FIELD FileId(0) 32..41 32..37 Other
+
+                FileId(0) 102..107 FieldShorthandForField Read
+            "#]],
+        );
+    }
+
+    #[test]
+    fn test_find_all_refs_enum_var_privacy() {
+        check(
+            r#"
+mod m {
+    pub enum En {
+        Variant {
+            field<|>: u8,
+        }
+    }
+}
+
+fn f() -> m::En {
+    m::En::Variant { field: 0 }
+}
+"#,
+            expect![[r#"
+                field RECORD_FIELD FileId(0) 56..65 56..61 Other
+
+                FileId(0) 125..130 Other Read
+            "#]],
+        );
+    }
+
     fn check(ra_fixture: &str, expect: Expect) {
         check_with_scope(ra_fixture, None, expect)
     }
diff --git a/crates/ide_db/src/search.rs b/crates/ide_db/src/search.rs
index edab1d644..8e3dcd99c 100644
--- a/crates/ide_db/src/search.rs
+++ b/crates/ide_db/src/search.rs
@@ -12,8 +12,9 @@ use once_cell::unsync::Lazy;
 use rustc_hash::FxHashMap;
 use syntax::{ast, match_ast, AstNode, TextRange, TextSize};
 
+use crate::defs::NameClass;
 use crate::{
-    defs::{classify_name_ref, Definition, NameRefClass},
+    defs::{classify_name, classify_name_ref, Definition, NameRefClass},
     RootDatabase,
 };
 
@@ -226,9 +227,9 @@ impl<'a> FindUsages<'a> {
 
         let search_scope = {
             let base = self.def.search_scope(sema.db);
-            match self.scope {
+            match &self.scope {
                 None => base,
-                Some(scope) => base.intersection(&scope),
+                Some(scope) => base.intersection(scope),
             }
         };
 
@@ -251,54 +252,83 @@ impl<'a> FindUsages<'a> {
                     continue;
                 }
 
-                let name_ref: ast::NameRef =
-                    match sema.find_node_at_offset_with_descend(&tree, offset) {
-                        Some(it) => it,
-                        None => continue,
-                    };
-
-                match classify_name_ref(&sema, &name_ref) {
-                    Some(NameRefClass::Definition(def)) if &def == self.def => {
-                        let kind = if is_record_lit_name_ref(&name_ref)
-                            || is_call_expr_name_ref(&name_ref)
-                        {
-                            ReferenceKind::StructLiteral
-                        } else {
-                            ReferenceKind::Other
-                        };
-
-                        let reference = Reference {
-                            file_range: sema.original_range(name_ref.syntax()),
-                            kind,
-                            access: reference_access(&def, &name_ref),
-                        };
-                        if sink(reference) {
+                match sema.find_node_at_offset_with_descend(&tree, offset) {
+                    Some(name_ref) => {
+                        if self.found_name_ref(&name_ref, sink) {
                             return;
                         }
                     }
-                    Some(NameRefClass::FieldShorthand { local, field }) => {
-                        let reference = match self.def {
-                            Definition::Field(_) if &field == self.def => Reference {
-                                file_range: self.sema.original_range(name_ref.syntax()),
-                                kind: ReferenceKind::FieldShorthandForField,
-                                access: reference_access(&field, &name_ref),
-                            },
-                            Definition::Local(l) if &local == l => Reference {
-                                file_range: self.sema.original_range(name_ref.syntax()),
-                                kind: ReferenceKind::FieldShorthandForLocal,
-                                access: reference_access(&Definition::Local(local), &name_ref),
-                            },
-                            _ => continue, // not a usage
-                        };
-                        if sink(reference) {
-                            return;
+                    None => match sema.find_node_at_offset_with_descend(&tree, offset) {
+                        Some(name) => {
+                            if self.found_name(&name, sink) {
+                                return;
+                            }
                         }
-                    }
-                    _ => {} // not a usage
+                        None => {}
+                    },
                 }
             }
         }
     }
+
+    fn found_name_ref(
+        &self,
+        name_ref: &ast::NameRef,
+        sink: &mut dyn FnMut(Reference) -> bool,
+    ) -> bool {
+        match classify_name_ref(self.sema, &name_ref) {
+            Some(NameRefClass::Definition(def)) if &def == self.def => {
+                let kind = if is_record_lit_name_ref(&name_ref) || is_call_expr_name_ref(&name_ref)
+                {
+                    ReferenceKind::StructLiteral
+                } else {
+                    ReferenceKind::Other
+                };
+
+                let reference = Reference {
+                    file_range: self.sema.original_range(name_ref.syntax()),
+                    kind,
+                    access: reference_access(&def, &name_ref),
+                };
+                sink(reference)
+            }
+            Some(NameRefClass::FieldShorthand { local, field }) => {
+                let reference = match self.def {
+                    Definition::Field(_) if &field == self.def => Reference {
+                        file_range: self.sema.original_range(name_ref.syntax()),
+                        kind: ReferenceKind::FieldShorthandForField,
+                        access: reference_access(&field, &name_ref),
+                    },
+                    Definition::Local(l) if &local == l => Reference {
+                        file_range: self.sema.original_range(name_ref.syntax()),
+                        kind: ReferenceKind::FieldShorthandForLocal,
+                        access: reference_access(&Definition::Local(local), &name_ref),
+                    },
+                    _ => return false, // not a usage
+                };
+                sink(reference)
+            }
+            _ => false, // not a usage
+        }
+    }
+
+    fn found_name(&self, name: &ast::Name, sink: &mut dyn FnMut(Reference) -> bool) -> bool {
+        match classify_name(self.sema, name) {
+            Some(NameClass::FieldShorthand { local: _, field }) => {
+                let reference = match self.def {
+                    Definition::Field(_) if &field == self.def => Reference {
+                        file_range: self.sema.original_range(name.syntax()),
+                        kind: ReferenceKind::FieldShorthandForField,
+                        // FIXME: mutable patterns should have `Write` access
+                        access: Some(ReferenceAccess::Read),
+                    },
+                    _ => return false, // not a usage
+                };
+                sink(reference)
+            }
+            _ => false, // not a usage
+        }
+    }
 }
 
 fn reference_access(def: &Definition, name_ref: &ast::NameRef) -> Option<ReferenceAccess> {
diff --git a/crates/project_model/src/sysroot.rs b/crates/project_model/src/sysroot.rs
index 871808d89..e529e07b0 100644
--- a/crates/project_model/src/sysroot.rs
+++ b/crates/project_model/src/sysroot.rs
@@ -90,9 +90,15 @@ impl Sysroot {
         }
 
         if sysroot.by_name("core").is_none() {
+            let var_note = if env::var_os("RUST_SRC_PATH").is_some() {
+                " (`RUST_SRC_PATH` might be incorrect, try unsetting it)"
+            } else {
+                ""
+            };
             anyhow::bail!(
-                "could not find libcore in sysroot path `{}`",
-                sysroot_src_dir.as_ref().display()
+                "could not find libcore in sysroot path `{}`{}",
+                sysroot_src_dir.as_ref().display(),
+                var_note,
             );
         }