1 use syntax::{ast, AstNode, T};
3 use crate::{AssistContext, AssistId, AssistKind, Assists};
5 // Assist: split_import
7 // Wraps the tail of import into braces.
10 // use std::$0collections::HashMap;
14 // use std::{collections::HashMap};
16 pub(crate) fn split_import(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
17 let colon_colon = ctx.find_token_syntax_at_offset(T![::])?;
18 let path = ast::Path::cast(colon_colon.parent()?)?.qualifier()?;
20 let use_tree = path.top_path().syntax().ancestors().find_map(ast::UseTree::cast)?;
22 let has_errors = use_tree
24 .descendants_with_tokens()
25 .any(|it| it.kind() == syntax::SyntaxKind::ERROR);
26 let last_segment = use_tree.path().and_then(|it| it.segment());
27 if has_errors || last_segment.is_none() {
31 let target = colon_colon.text_range();
32 acc.add(AssistId("split_import", AssistKind::RefactorRewrite), "Split import", target, |edit| {
33 let use_tree = edit.make_mut(use_tree.clone());
34 let path = edit.make_mut(path);
35 use_tree.split_prefix(&path);
41 use crate::tests::{check_assist, check_assist_not_applicable, check_assist_target};
46 fn test_split_import() {
49 "use crate::$0db::RootDatabase;",
50 "use crate::{db::RootDatabase};",
55 fn split_import_works_with_trees() {
58 "use crate:$0:db::{RootDatabase, FileSymbol}",
59 "use crate::{db::{RootDatabase, FileSymbol}}",
64 fn split_import_target() {
65 check_assist_target(split_import, "use crate::$0db::{RootDatabase, FileSymbol}", "::");
70 check_assist_not_applicable(split_import, "use crate::$0:::self;")
75 check_assist_not_applicable(