2 files changed, 5 insertions, 100 deletions

diff --git a/crates/ra_assists/src/assist_ctx.rs b/crates/ra_assists/src/assist_ctx.rs
index cbe12e908..5f564be0b 100644
--- a/crates/ra_assists/src/assist_ctx.rs
+++ b/crates/ra_assists/src/assist_ctx.rs
@@ -178,9 +178,7 @@ impl AssistBuilder {
     }
 
     pub(crate) fn replace_ast<N: AstNode>(&mut self, old: N, new: N) {
-        for (from, to) in algo::diff(old.syntax(), new.syntax()) {
-            self.edit.replace(from.text_range(), to.to_string())
-        }
+        algo::diff(old.syntax(), new.syntax()).into_text_edit(&mut self.edit)
     }
 
     fn build(self) -> AssistAction {
diff --git a/crates/ra_assists/src/ast_editor.rs b/crates/ra_assists/src/ast_editor.rs
index 262e2fcf4..54849b7b0 100644
--- a/crates/ra_assists/src/ast_editor.rs
+++ b/crates/ra_assists/src/ast_editor.rs
@@ -1,15 +1,12 @@
 use std::{iter, ops::RangeInclusive};
 
-use arrayvec::ArrayVec;
-use rustc_hash::FxHashMap;
-
-use ra_fmt::leading_indent;
 use ra_syntax::{
     algo,
-    ast::{self, make::tokens, TypeBoundsOwner},
-    AstNode, Direction, InsertPosition, SyntaxElement, T,
+    ast::{self, TypeBoundsOwner},
+    AstNode, SyntaxElement,
 };
 use ra_text_edit::TextEditBuilder;
+use rustc_hash::FxHashMap;
 
 pub struct AstEditor<N: AstNode> {
     original_ast: N,
@@ -25,9 +22,7 @@ impl<N: AstNode> AstEditor<N> {
     }
 
     pub fn into_text_edit(self, builder: &mut TextEditBuilder) {
-        for (from, to) in algo::diff(&self.original_ast.syntax(), self.ast().syntax()) {
-            builder.replace(from.text_range(), to.to_string())
-        }
+        algo::diff(&self.original_ast.syntax(), self.ast().syntax()).into_text_edit(builder)
     }
 
     pub fn ast(&self) -> &N {
@@ -47,16 +42,6 @@ impl<N: AstNode> AstEditor<N> {
     }
 
     #[must_use]
-    fn insert_children(
-        &self,
-        position: InsertPosition<SyntaxElement>,
-        mut to_insert: impl Iterator<Item = SyntaxElement>,
-    ) -> N {
-        let new_syntax = algo::insert_children(self.ast().syntax(), position, &mut to_insert);
-        N::cast(new_syntax).unwrap()
-    }
-
-    #[must_use]
     fn replace_children(
         &self,
         to_delete: RangeInclusive<SyntaxElement>,
@@ -67,84 +52,6 @@ impl<N: AstNode> AstEditor<N> {
     }
 }
 
-impl AstEditor<ast::RecordFieldList> {
-    pub fn append_field(&mut self, field: &ast::RecordField) {
-        self.insert_field(InsertPosition::Last, field)
-    }
-
-    pub fn insert_field(
-        &mut self,
-        position: InsertPosition<&'_ ast::RecordField>,
-        field: &ast::RecordField,
-    ) {
-        let is_multiline = self.ast().syntax().text().contains_char('\n');
-        let ws;
-        let space = if is_multiline {
-            ws = tokens::WsBuilder::new(&format!(
-                "\n{}    ",
-                leading_indent(self.ast().syntax()).unwrap_or("".into())
-            ));
-            ws.ws()
-        } else {
-            tokens::single_space()
-        };
-
-        let mut to_insert: ArrayVec<[SyntaxElement; 4]> = ArrayVec::new();
-        to_insert.push(space.into());
-        to_insert.push(field.syntax().clone().into());
-        to_insert.push(tokens::comma().into());
-
-        macro_rules! after_l_curly {
-            () => {{
-                let anchor = match self.l_curly() {
-                    Some(it) => it,
-                    None => return,
-                };
-                InsertPosition::After(anchor)
-            }};
-        }
-
-        macro_rules! after_field {
-            ($anchor:expr) => {
-                if let Some(comma) = $anchor
-                    .syntax()
-                    .siblings_with_tokens(Direction::Next)
-                    .find(|it| it.kind() == T![,])
-                {
-                    InsertPosition::After(comma)
-                } else {
-                    to_insert.insert(0, tokens::comma().into());
-                    InsertPosition::After($anchor.syntax().clone().into())
-                }
-            };
-        };
-
-        let position = match position {
-            InsertPosition::First => after_l_curly!(),
-            InsertPosition::Last => {
-                if !is_multiline {
-                    // don't insert comma before curly
-                    to_insert.pop();
-                }
-                match self.ast().fields().last() {
-                    Some(it) => after_field!(it),
-                    None => after_l_curly!(),
-                }
-            }
-            InsertPosition::Before(anchor) => {
-                InsertPosition::Before(anchor.syntax().clone().into())
-            }
-            InsertPosition::After(anchor) => after_field!(anchor),
-        };
-
-        self.ast = self.insert_children(position, to_insert.iter().cloned());
-    }
-
-    fn l_curly(&self) -> Option<SyntaxElement> {
-        self.ast().syntax().children_with_tokens().find(|it| it.kind() == T!['{'])
-    }
-}
-
 impl AstEditor<ast::TypeParam> {
     pub fn remove_bounds(&mut self) -> &mut Self {
         let colon = match self.ast.colon_token() {