braces around {self} in UseTree are not unnecessary · rust-lang/rust@dd16cbc (original) (raw)
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- src/tools/rust-analyzer/crates
2 files changed
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -776,6 +776,40 @@ mod z { | ||
| 776 | 776 | ); |
| 777 | 777 | } |
| 778 | 778 | |
| 779 | +#[test] | |
| 780 | +fn remove_unused_fixes_nested_self() { | |
| 781 | +check_assist( | |
| 782 | + remove_unused_imports, | |
| 783 | +r#" | |
| 784 | +mod inner { | |
| 785 | + pub struct X(); | |
| 786 | + pub struct Y(); | |
| 787 | +} | |
| 788 | + | |
| 789 | +mod z { | |
| 790 | + use super::inner::{self, X}$0; | |
| 791 | + | |
| 792 | + fn f() { | |
| 793 | + let y = inner::Y(); | |
| 794 | + } | |
| 795 | +} | |
| 796 | +"#, | |
| 797 | +r#"mod inner { | |
| 798 | + pub struct X(); | |
| 799 | + pub struct Y(); | |
| 800 | +} | |
| 801 | + | |
| 802 | +mod z { | |
| 803 | + use super::inner::{self}; | |
| 804 | + | |
| 805 | + fn f() { | |
| 806 | + let y = inner::Y(); | |
| 807 | + } | |
| 808 | +} | |
| 809 | +"#, | |
| 810 | +); | |
| 811 | +} | |
| 812 | + | |
| 779 | 813 | #[test] |
| 780 | 814 | fn dont_remove_used_glob() { |
| 781 | 815 | check_assist_not_applicable( |
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -378,9 +378,26 @@ impl ast::UseTreeList { | ||
| 378 | 378 | |
| 379 | 379 | /// Remove the unnecessary braces in current `UseTreeList` |
| 380 | 380 | pub fn remove_unnecessary_braces(mut self) { |
| 381 | +// Returns true iff there is a single subtree and it is not the self keyword. The braces in | |
| 382 | +// `use x::{self};` are necessary and so we should not remove them. | |
| 383 | +let has_single_subtree_that_is_not_self = |u: &ast::UseTreeList | |
| 384 | +if let Some((single_subtree,)) = u.use_trees().collect_tuple() { | |
| 385 | +// We have a single subtree, check whether it is self. | |
| 386 | + | |
| 387 | +let is_self = single_subtree.path().as_ref().map_or(false, |path | |
| 388 | + path.segment().and_then(|seg | |
| 389 | + && path.qualifier().is_none() | |
| 390 | +}); | |
| 391 | + | |
| 392 | + !is_self | |
| 393 | +} else { | |
| 394 | +// Not a single subtree | |
| 395 | +false | |
| 396 | +} | |
| 397 | +}; | |
| 398 | + | |
| 381 | 399 | let remove_brace_in_use_tree_list = |u: &ast::UseTreeList |
| 382 | -let use_tree_count = u.use_trees().count(); | |
| 383 | -if use_tree_count == 1 { | |
| 400 | +if has_single_subtree_that_is_not_self(u) { | |
| 384 | 401 | if let Some(a) = u.l_curly_token() { |
| 385 | 402 | ted::remove(a) |
| 386 | 403 | } |