Add emacs function for extend shirnk selection

2018-09-19 00:46:10 +03:00
parent 79293d2593
commit d6c7030aeb
4 changed files with 123 additions and 3 deletions
--- a/crates/ra_syntax/src/algo/mod.rs
+++ b/crates/ra_syntax/src/algo/mod.rs
@@ -78,7 +78,11 @@ impl<'f> Iterator for LeafAtOffset<'f> {
 }

 pub fn find_covering_node(root: SyntaxNodeRef, range: TextRange) -> SyntaxNodeRef {
-    assert!(is_subrange(root.range(), range));
+    assert!(
+        is_subrange(root.range(), range),
+        "node range: {:?}, target range: {:?}",
+        root.range(), range,
+    );
    let (left, right) = match (
        find_leaf_at_offset(root, range.start()).right_biased(),
        find_leaf_at_offset(root, range.end()).left_biased()