bendns' repos / rust-analyzer
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Diffstat (limited to 'crates/syntax/src/ast/edit_in_place.rs')
-rw-r--r--crates/syntax/src/ast/edit_in_place.rs36
1 files changed, 36 insertions, 0 deletions
diff --git a/crates/syntax/src/ast/edit_in_place.rs b/crates/syntax/src/ast/edit_in_place.rs
index 606804aea2..a150d9e6c0 100644
--- a/crates/syntax/src/ast/edit_in_place.rs
+++ b/crates/syntax/src/ast/edit_in_place.rs
@@ -380,6 +380,26 @@ impl Removable for ast::UseTree {
}
impl ast::UseTree {
+ /// Deletes the usetree node represented by the input. Recursively removes parents, including use nodes that become empty.
+ pub fn remove_recursive(self) {
+ let parent = self.syntax().parent();
+
+ self.remove();
+
+ if let Some(u) = parent.clone().and_then(ast::Use::cast) {
+ if u.use_tree().is_none() {
+ u.remove();
+ }
+ } else if let Some(u) = parent.and_then(ast::UseTreeList::cast) {
+ if u.use_trees().next().is_none() {
+ let parent = u.syntax().parent().and_then(ast::UseTree::cast);
+ if let Some(u) = parent {
+ u.remove_recursive();
+ }
+ }
+ }
+ }
+
pub fn get_or_create_use_tree_list(&self) -> ast::UseTreeList {
match self.use_tree_list() {
Some(it) => it,
@@ -487,6 +507,22 @@ impl Removable for ast::Use {
}
}
}
+ let prev_ws = self
+ .syntax()
+ .prev_sibling_or_token()
+ .and_then(|it| it.into_token())
+ .and_then(ast::Whitespace::cast);
+ if let Some(prev_ws) = prev_ws {
+ let ws_text = prev_ws.syntax().text();
+ let prev_newline = ws_text.rfind('\n').map(|x| x + 1).unwrap_or(0);
+ let rest = &ws_text[0..prev_newline];
+ if rest.is_empty() {
+ ted::remove(prev_ws.syntax());
+ } else {
+ ted::replace(prev_ws.syntax(), make::tokens::whitespace(rest));
+ }
+ }
+
ted::remove(self.syntax());
}
}