From 2fc22901730f35405d2bdfe33f88d7b3c6b14304 Mon Sep 17 00:00:00 2001
From: Ekaterina Babshukova <ekaterina.babshukova@yandex.ru>
Date: Sat, 5 Oct 2019 17:03:03 +0300
Subject: replace AST visitors with macro

---
 crates/ra_ide_api/src/completion/complete_fn_param.rs | 16 ++++++++--------
 crates/ra_ide_api/src/completion/complete_keyword.rs  | 18 ++++++++++--------
 2 files changed, 18 insertions(+), 16 deletions(-)

(limited to 'crates/ra_ide_api/src/completion')

diff --git a/crates/ra_ide_api/src/completion/complete_fn_param.rs b/crates/ra_ide_api/src/completion/complete_fn_param.rs
index 844a63f6c..3e936e3ec 100644
--- a/crates/ra_ide_api/src/completion/complete_fn_param.rs
+++ b/crates/ra_ide_api/src/completion/complete_fn_param.rs
@@ -1,9 +1,6 @@
 //! FIXME: write short doc here
 
-use ra_syntax::{
-    algo::visit::{visitor_ctx, VisitorCtx},
-    ast, AstNode,
-};
+use ra_syntax::{ast, match_ast, AstNode};
 use rustc_hash::FxHashMap;
 
 use crate::completion::{CompletionContext, CompletionItem, CompletionKind, Completions};
@@ -19,10 +16,13 @@ pub(super) fn complete_fn_param(acc: &mut Completions, ctx: &CompletionContext)
 
     let mut params = FxHashMap::default();
     for node in ctx.token.parent().ancestors() {
-        let _ = visitor_ctx(&mut params)
-            .visit::<ast::SourceFile, _>(process)
-            .visit::<ast::ItemList, _>(process)
-            .accept(&node);
+        match_ast! {
+            match node {
+                ast::SourceFile(it) => { process(it, &mut params) },
+                ast::ItemList(it) => { process(it, &mut params) },
+                _ => (),
+            }
+        }
     }
     params
         .into_iter()
diff --git a/crates/ra_ide_api/src/completion/complete_keyword.rs b/crates/ra_ide_api/src/completion/complete_keyword.rs
index 3f121d45c..48c688a08 100644
--- a/crates/ra_ide_api/src/completion/complete_keyword.rs
+++ b/crates/ra_ide_api/src/completion/complete_keyword.rs
@@ -1,9 +1,8 @@
 //! FIXME: write short doc here
 
 use ra_syntax::{
-    algo::visit::{visitor, Visitor},
     ast::{self, LoopBodyOwner},
-    AstNode,
+    match_ast, AstNode,
     SyntaxKind::*,
     SyntaxToken,
 };
@@ -84,12 +83,15 @@ fn is_in_loop_body(leaf: &SyntaxToken) -> bool {
         if node.kind() == FN_DEF || node.kind() == LAMBDA_EXPR {
             break;
         }
-        let loop_body = visitor()
-            .visit::<ast::ForExpr, _>(|it| it.loop_body())
-            .visit::<ast::WhileExpr, _>(|it| it.loop_body())
-            .visit::<ast::LoopExpr, _>(|it| it.loop_body())
-            .accept(&node);
-        if let Some(Some(body)) = loop_body {
+        let loop_body = match_ast! {
+            match node {
+                ast::ForExpr(it) => { it.loop_body() },
+                ast::WhileExpr(it) => { it.loop_body() },
+                ast::LoopExpr(it) => { it.loop_body() },
+                _ => None,
+            }
+        };
+        if let Some(body) = loop_body {
             if leaf.text_range().is_subrange(&body.syntax().text_range()) {
                 return true;
             }
-- 
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