Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/ide-db/src/path_transform.rs')
| -rw-r--r-- | crates/ide-db/src/path_transform.rs | 26 |
1 files changed, 21 insertions, 5 deletions
diff --git a/crates/ide-db/src/path_transform.rs b/crates/ide-db/src/path_transform.rs index 84a388a460..0afa9163e3 100644 --- a/crates/ide-db/src/path_transform.rs +++ b/crates/ide-db/src/path_transform.rs @@ -7,7 +7,7 @@ use itertools::Itertools; use rustc_hash::FxHashMap; use syntax::{ ast::{self, make, AstNode, HasGenericArgs}, - ted, SyntaxNode, + ted, NodeOrToken, SyntaxNode, }; #[derive(Default)] @@ -328,10 +328,26 @@ impl Ctx<'_> { let qualified = make::path_from_segments(std::iter::once(segment), false); ted::replace(path.syntax(), qualified.clone_for_update().syntax()); } else if let Some(path_ty) = ast::PathType::cast(parent) { - ted::replace( - path_ty.syntax(), - subst.clone_subtree().clone_for_update().syntax(), - ); + let old = path_ty.syntax(); + + if old.parent().is_some() { + ted::replace(old, subst.clone_subtree().clone_for_update().syntax()); + } else { + // Some `path_ty` has no parent, especially ones made for default value + // of type parameters. + // In this case, `ted` cannot replace `path_ty` with `subst` directly. + // So, just replace its children as long as the `subst` is the same type. + let new = subst.clone_subtree().clone_for_update(); + if !matches!(new, ast::Type::PathType(..)) { + return None; + } + let start = path_ty.syntax().first_child().map(NodeOrToken::Node)?; + let end = path_ty.syntax().last_child().map(NodeOrToken::Node)?; + ted::replace_all( + start..=end, + new.syntax().children().map(NodeOrToken::Node).collect::<Vec<_>>(), + ); + } } else { ted::replace( path.syntax(), |