From 36865adcb946d5567fb61d3547b78fc71df58b20 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Tue, 11 Jun 2019 16:40:49 +0300
Subject: Introduce HasSource trait

---
 crates/ra_hir/src/code_model.rs | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'crates/ra_hir/src/code_model.rs')

diff --git a/crates/ra_hir/src/code_model.rs b/crates/ra_hir/src/code_model.rs
index 63fdca55e..765850488 100644
--- a/crates/ra_hir/src/code_model.rs
+++ b/crates/ra_hir/src/code_model.rs
@@ -31,6 +31,11 @@ impl<T> From<(HirFileId, T)> for Source<T> {
     }
 }
 
+pub trait HasSource {
+    type Ast;
+    fn source(self, db: &(impl DefDatabase + AstDatabase)) -> Source<Self::Ast>;
+}
+
 /// hir::Crate describes a single crate. It's the main interface with which
 /// a crate's dependencies interact. Mostly, it should be just a proxy for the
 /// root module.
@@ -364,6 +369,13 @@ pub struct Struct {
     pub(crate) id: StructId,
 }
 
+impl HasSource for Struct {
+    type Ast = TreeArc<ast::StructDef>;
+    fn source(self, db: &(impl DefDatabase + AstDatabase)) -> Source<TreeArc<ast::StructDef>> {
+        self.id.source(db).into()
+    }
+}
+
 impl Struct {
     pub fn source(self, db: &(impl DefDatabase + AstDatabase)) -> Source<TreeArc<ast::StructDef>> {
         self.id.source(db).into()
@@ -422,6 +434,13 @@ pub struct Union {
     pub(crate) id: StructId,
 }
 
+impl HasSource for Union {
+    type Ast = TreeArc<ast::StructDef>;
+    fn source(self, db: &(impl DefDatabase + AstDatabase)) -> Source<TreeArc<ast::StructDef>> {
+        self.id.source(db).into()
+    }
+}
+
 impl Union {
     pub fn source(
         self,
@@ -455,6 +474,13 @@ pub struct Enum {
     pub(crate) id: EnumId,
 }
 
+impl HasSource for Enum {
+    type Ast = TreeArc<ast::EnumDef>;
+    fn source(self, db: &(impl DefDatabase + AstDatabase)) -> Source<TreeArc<ast::EnumDef>> {
+        self.id.source(db).into()
+    }
+}
+
 impl Enum {
     pub fn source(self, db: &(impl DefDatabase + AstDatabase)) -> Source<TreeArc<ast::EnumDef>> {
         self.id.source(db).into()
-- 
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