minor: move functionality to a better place

crates/ide_assists/src/utils.rs

@@ -13,6 +13,7 @@ use syntax::{
     ast::{
         self,
         edit::{self, AstNodeEdit},
+        edit_in_place::AttrsOwnerEdit,
         make, ArgListOwner, AttrsOwner, GenericParamsOwner, NameOwner, TypeBoundsOwner,
     },
     ted, AstNode, Direction, SmolStr,
@@ -130,7 +131,7 @@ pub fn add_trait_assoc_items_to_impl(
     let items = items.into_iter().map(|assoc_item| {
         let assoc_item = assoc_item.clone_for_update();
         transform.apply(assoc_item.syntax());
-        edit::remove_attrs_and_docs(&assoc_item);
+        assoc_item.remove_attrs_and_docs();
         assoc_item
     });
 

crates/ide_completion/src/completions/trait_impl.rs

@@ -34,7 +34,7 @@
 use hir::{self, HasAttrs, HasSource};
 use ide_db::{path_transform::PathTransform, traits::get_missing_assoc_items, SymbolKind};
 use syntax::{
-    ast::{self, edit},
+    ast::{self, edit_in_place::AttrsOwnerEdit},
     display::function_declaration,
     AstNode, SyntaxElement, SyntaxKind, SyntaxNode, SyntaxToken, TextRange, T,
 };
@@ -195,7 +195,7 @@ fn get_transformed_assoc_item(
 
     transform.apply(assoc_item.syntax());
     if let ast::AssocItem::Fn(func) = &assoc_item {
-        edit::remove_attrs_and_docs(func)
+        func.remove_attrs_and_docs()
     }
     Some(assoc_item)
 }
@@ -253,7 +253,7 @@ fn add_const_impl(
 }
 
 fn make_const_compl_syntax(const_: &ast::Const) -> String {
-    edit::remove_attrs_and_docs(const_);
+    const_.remove_attrs_and_docs();
 
     let const_start = const_.syntax().text_range().start();
     let const_end = const_.syntax().text_range().end();

crates/syntax/src/ast/edit.rs

@@ -6,9 +6,7 @@ use std::{fmt, iter, ops};
 use crate::{
     algo,
     ast::{self, make, AstNode},
-    ted, AstToken, NodeOrToken, SyntaxElement,
-    SyntaxKind::{ATTR, COMMENT, WHITESPACE},
-    SyntaxNode, SyntaxToken,
+    ted, AstToken, NodeOrToken, SyntaxElement, SyntaxNode, SyntaxToken,
 };
 
 impl ast::UseTree {
@@ -48,28 +46,6 @@ impl ast::UseTree {
     }
 }
 
-pub fn remove_attrs_and_docs<N: ast::AttrsOwner>(node: &N) {
-    remove_attrs_and_docs_inner(node.syntax())
-}
-
-fn remove_attrs_and_docs_inner(node: &SyntaxNode) {
-    let mut remove_next_ws = false;
-    for child in node.children_with_tokens() {
-        match child.kind() {
-            ATTR | COMMENT => {
-                remove_next_ws = true;
-                child.detach();
-                continue;
-            }
-            WHITESPACE if remove_next_ws => {
-                child.detach();
-            }
-            _ => (),
-        }
-        remove_next_ws = false;
-    }
-}
-
 #[derive(Debug, Clone, Copy)]
 pub struct IndentLevel(pub u8);
 

crates/syntax/src/ast/edit_in_place.rs

@@ -13,7 +13,9 @@ use crate::{
         make, GenericParamsOwner,
     },
     ted::{self, Position},
-    AstNode, AstToken, Direction, SyntaxNode,
+    AstNode, AstToken, Direction,
+    SyntaxKind::{ATTR, COMMENT, WHITESPACE},
+    SyntaxNode,
 };
 
 use super::NameOwner;
@@ -196,6 +198,32 @@ fn create_generic_param_list(position: Position) -> ast::GenericParamList {
     gpl
 }
 
+pub trait AttrsOwnerEdit: ast::AttrsOwner + AstNodeEdit {
+    fn remove_attrs_and_docs(&self) {
+        remove_attrs_and_docs(self.syntax());
+
+        fn remove_attrs_and_docs(node: &SyntaxNode) {
+            let mut remove_next_ws = false;
+            for child in node.children_with_tokens() {
+                match child.kind() {
+                    ATTR | COMMENT => {
+                        remove_next_ws = true;
+                        child.detach();
+                        continue;
+                    }
+                    WHITESPACE if remove_next_ws => {
+                        child.detach();
+                    }
+                    _ => (),
+                }
+                remove_next_ws = false;
+            }
+        }
+    }
+}
+
+impl<T: ast::AttrsOwner + AstNodeEdit> AttrsOwnerEdit for T {}
+
 impl ast::GenericParamList {
     pub fn add_generic_param(&self, generic_param: ast::GenericParam) {
         match self.generic_params().last() {