From e42f9627664cc3c44094e1c4f985270fbfd592b1 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Fri, 22 Nov 2019 11:27:47 +0300
Subject: Encapsulate Attrs

---
 crates/ra_hir/src/code_model/attrs.rs | 16 +++++++++-------
 crates/ra_hir/src/db.rs               |  4 ++--
 2 files changed, 11 insertions(+), 9 deletions(-)

(limited to 'crates/ra_hir/src')

diff --git a/crates/ra_hir/src/code_model/attrs.rs b/crates/ra_hir/src/code_model/attrs.rs
index 9e304217c..9923cde81 100644
--- a/crates/ra_hir/src/code_model/attrs.rs
+++ b/crates/ra_hir/src/code_model/attrs.rs
@@ -8,7 +8,6 @@ use crate::{
 use hir_def::attr::Attr;
 use hir_expand::hygiene::Hygiene;
 use ra_syntax::ast;
-use std::sync::Arc;
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 pub enum AttrDef {
@@ -38,16 +37,19 @@ impl_froms!(
 );
 
 pub trait Attrs {
-    fn attrs(&self, db: &impl HirDatabase) -> Option<Arc<[Attr]>>;
+    fn attrs(&self, db: &impl HirDatabase) -> hir_def::attr::Attrs;
 }
 
 pub(crate) fn attributes_query(
     db: &(impl DefDatabase + AstDatabase),
     def: AttrDef,
-) -> Option<Arc<[Attr]>> {
+) -> hir_def::attr::Attrs {
     match def {
         AttrDef::Module(it) => {
-            let src = it.declaration_source(db)?;
+            let src = match it.declaration_source(db) {
+                Some(it) => it,
+                None => return hir_def::attr::Attrs::default(),
+            };
             let hygiene = Hygiene::new(db, src.file_id);
             Attr::from_attrs_owner(&src.value, &hygiene)
         }
@@ -57,7 +59,7 @@ pub(crate) fn attributes_query(
                 let hygiene = Hygiene::new(db, src.file_id);
                 Attr::from_attrs_owner(&named, &hygiene)
             }
-            FieldSource::Pos(..) => None,
+            FieldSource::Pos(..) => hir_def::attr::Attrs::default(),
         },
         AttrDef::Adt(it) => match it {
             Adt::Struct(it) => attrs_from_ast(it, db),
@@ -74,7 +76,7 @@ pub(crate) fn attributes_query(
     }
 }
 
-fn attrs_from_ast<T, D>(node: T, db: &D) -> Option<Arc<[Attr]>>
+fn attrs_from_ast<T, D>(node: T, db: &D) -> hir_def::attr::Attrs
 where
     T: HasSource,
     T::Ast: ast::AttrsOwner,
@@ -86,7 +88,7 @@ where
 }
 
 impl<T: Into<AttrDef> + Copy> Attrs for T {
-    fn attrs(&self, db: &impl HirDatabase) -> Option<Arc<[Attr]>> {
+    fn attrs(&self, db: &impl HirDatabase) -> hir_def::attr::Attrs {
         db.attrs((*self).into())
     }
 }
diff --git a/crates/ra_hir/src/db.rs b/crates/ra_hir/src/db.rs
index ed0d68001..1f63be3b9 100644
--- a/crates/ra_hir/src/db.rs
+++ b/crates/ra_hir/src/db.rs
@@ -2,7 +2,7 @@
 
 use std::sync::Arc;
 
-use hir_def::attr::Attr;
+use hir_def::attr::Attrs;
 use ra_db::salsa;
 use ra_syntax::SmolStr;
 
@@ -61,7 +61,7 @@ pub trait DefDatabase: HirDebugDatabase + DefDatabase2 {
     fn documentation(&self, def: crate::DocDef) -> Option<crate::Documentation>;
 
     #[salsa::invoke(crate::code_model::attrs::attributes_query)]
-    fn attrs(&self, def: crate::AttrDef) -> Option<Arc<[Attr]>>;
+    fn attrs(&self, def: crate::AttrDef) -> Attrs;
 }
 
 #[salsa::query_group(HirDatabaseStorage)]
-- 
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