From f377b94628a265cb5335fbe4594a47cc8ddc9e2c Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Mon, 2 Sep 2019 19:45:41 +0300
Subject: remove useless trait

---
 crates/ra_hir/src/expr.rs             | 4 ++--
 crates/ra_syntax/src/ast/generated.rs | 7 +++++--
 crates/ra_syntax/src/ast/traits.rs    | 6 ------
 crates/ra_syntax/src/grammar.ron      | 2 +-
 4 files changed, 8 insertions(+), 11 deletions(-)

diff --git a/crates/ra_hir/src/expr.rs b/crates/ra_hir/src/expr.rs
index 7cdc7555c..c7530849b 100644
--- a/crates/ra_hir/src/expr.rs
+++ b/crates/ra_hir/src/expr.rs
@@ -7,7 +7,7 @@ use ra_arena::{impl_arena_id, map::ArenaMap, Arena, RawId};
 use ra_syntax::{
     ast::{
         self, ArgListOwner, ArrayExprKind, LiteralKind, LoopBodyOwner, NameOwner,
-        TryBlockBodyOwner, TypeAscriptionOwner,
+        TypeAscriptionOwner,
     },
     AstNode, AstPtr, SyntaxNodePtr,
 };
@@ -640,7 +640,7 @@ where
                 self.alloc_expr(Expr::If { condition, then_branch, else_branch }, syntax_ptr)
             }
             ast::Expr::TryBlockExpr(e) => {
-                let body = self.collect_block_opt(e.try_body());
+                let body = self.collect_block_opt(e.block());
                 self.alloc_expr(Expr::TryBlock { body }, syntax_ptr)
             }
             ast::Expr::BlockExpr(e) => self.collect_block_opt(e.block()),
diff --git a/crates/ra_syntax/src/ast/generated.rs b/crates/ra_syntax/src/ast/generated.rs
index 90480b6ca..7f91417c5 100644
--- a/crates/ra_syntax/src/ast/generated.rs
+++ b/crates/ra_syntax/src/ast/generated.rs
@@ -3134,8 +3134,11 @@ impl AstNode for TryBlockExpr {
         &self.syntax
     }
 }
-impl ast::TryBlockBodyOwner for TryBlockExpr {}
-impl TryBlockExpr {}
+impl TryBlockExpr {
+    pub fn block(&self) -> Option<Block> {
+        AstChildren::new(&self.syntax).next()
+    }
+}
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct TryExpr {
     pub(crate) syntax: SyntaxNode,
diff --git a/crates/ra_syntax/src/ast/traits.rs b/crates/ra_syntax/src/ast/traits.rs
index 1b9a2b20c..20c251fba 100644
--- a/crates/ra_syntax/src/ast/traits.rs
+++ b/crates/ra_syntax/src/ast/traits.rs
@@ -33,12 +33,6 @@ pub trait LoopBodyOwner: AstNode {
     }
 }
 
-pub trait TryBlockBodyOwner: AstNode {
-    fn try_body(&self) -> Option<ast::Block> {
-        child_opt(self)
-    }
-}
-
 pub trait ArgListOwner: AstNode {
     fn arg_list(&self) -> Option<ast::ArgList> {
         child_opt(self)
diff --git a/crates/ra_syntax/src/grammar.ron b/crates/ra_syntax/src/grammar.ron
index 1836862fe..9f17a10ed 100644
--- a/crates/ra_syntax/src/grammar.ron
+++ b/crates/ra_syntax/src/grammar.ron
@@ -426,7 +426,7 @@ Grammar(
             traits: ["LoopBodyOwner"],
         ),
         "TryBlockExpr": (
-            traits: ["TryBlockBodyOwner"],
+            options: ["Block"],
         ),
         "ForExpr": (
             traits: ["LoopBodyOwner"],
-- 
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