Update rowan

crates/ra_syntax/src/algo/mod.rs

@@ -1,5 +1,5 @@
 pub mod visit;
-pub mod walk;
+// pub mod walk;
 
 use crate::{
     text_utils::{contains_offset_nonstrict, is_subrange},

crates/ra_syntax/src/algo/walk.rs

@@ -1,28 +0,0 @@
-use crate::{algo::generate, SyntaxNodeRef};
-
-#[derive(Debug, Copy, Clone)]
-pub enum WalkEvent<'a> {
-    Enter(SyntaxNodeRef<'a>),
-    Exit(SyntaxNodeRef<'a>),
-}
-
-pub fn walk<'a>(root: SyntaxNodeRef<'a>) -> impl Iterator<Item = WalkEvent<'a>> {
-    generate(Some(WalkEvent::Enter(root)), move |pos| {
-        let next = match *pos {
-            WalkEvent::Enter(node) => match node.first_child() {
-                Some(child) => WalkEvent::Enter(child),
-                None => WalkEvent::Exit(node),
-            },
-            WalkEvent::Exit(node) => {
-                if node == root {
-                    return None;
-                }
-                match node.next_sibling() {
-                    Some(sibling) => WalkEvent::Enter(sibling),
-                    None => WalkEvent::Exit(node.parent().unwrap()),
-                }
-            }
-        };
-        Some(next)
-    })
-}