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-rw-r--r--crates/assists/src/handlers/change_return_type_to_result.rs1091
-rw-r--r--crates/assists/src/handlers/replace_derive_with_manual_impl.rs (renamed from crates/assists/src/handlers/add_custom_impl.rs)103
-rw-r--r--crates/assists/src/handlers/wrap_return_type_in_result.rs1158
-rw-r--r--crates/assists/src/lib.rs8
-rw-r--r--crates/assists/src/tests/generated.rs68
-rw-r--r--xtask/tests/tidy.rs8
6 files changed, 1261 insertions, 1175 deletions
diff --git a/crates/assists/src/handlers/change_return_type_to_result.rs b/crates/assists/src/handlers/change_return_type_to_result.rs
deleted file mode 100644
index 76f33a5b6..000000000
--- a/crates/assists/src/handlers/change_return_type_to_result.rs
+++ /dev/null
@@ -1,1091 +0,0 @@
1use std::iter;
2
3use syntax::{
4 ast::{self, make, BlockExpr, Expr, LoopBodyOwner},
5 match_ast, AstNode, SyntaxNode,
6};
7use test_utils::mark;
8
9use crate::{AssistContext, AssistId, AssistKind, Assists};
10
11// Assist: change_return_type_to_result
12//
13// Change the function's return type to Result.
14//
15// ```
16// fn foo() -> i32<|> { 42i32 }
17// ```
18// ->
19// ```
20// fn foo() -> Result<i32, ${0:_}> { Ok(42i32) }
21// ```
22pub(crate) fn change_return_type_to_result(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
23 let ret_type = ctx.find_node_at_offset::<ast::RetType>()?;
24 let parent = ret_type.syntax().parent()?;
25 let block_expr = match_ast! {
26 match parent {
27 ast::Fn(func) => func.body()?,
28 ast::ClosureExpr(closure) => match closure.body()? {
29 Expr::BlockExpr(block) => block,
30 // closures require a block when a return type is specified
31 _ => return None,
32 },
33 _ => return None,
34 }
35 };
36
37 let type_ref = &ret_type.ty()?;
38 let ret_type_str = type_ref.syntax().text().to_string();
39 let first_part_ret_type = ret_type_str.splitn(2, '<').next();
40 if let Some(ret_type_first_part) = first_part_ret_type {
41 if ret_type_first_part.ends_with("Result") {
42 mark::hit!(change_return_type_to_result_simple_return_type_already_result);
43 return None;
44 }
45 }
46
47 acc.add(
48 AssistId("change_return_type_to_result", AssistKind::RefactorRewrite),
49 "Wrap return type in Result",
50 type_ref.syntax().text_range(),
51 |builder| {
52 let mut tail_return_expr_collector = TailReturnCollector::new();
53 tail_return_expr_collector.collect_jump_exprs(&block_expr, false);
54 tail_return_expr_collector.collect_tail_exprs(&block_expr);
55
56 for ret_expr_arg in tail_return_expr_collector.exprs_to_wrap {
57 let ok_wrapped = make::expr_call(
58 make::expr_path(make::path_unqualified(make::path_segment(make::name_ref(
59 "Ok",
60 )))),
61 make::arg_list(iter::once(ret_expr_arg.clone())),
62 );
63 builder.replace_ast(ret_expr_arg, ok_wrapped);
64 }
65
66 match ctx.config.snippet_cap {
67 Some(cap) => {
68 let snippet = format!("Result<{}, ${{0:_}}>", type_ref);
69 builder.replace_snippet(cap, type_ref.syntax().text_range(), snippet)
70 }
71 None => builder
72 .replace(type_ref.syntax().text_range(), format!("Result<{}, _>", type_ref)),
73 }
74 },
75 )
76}
77
78struct TailReturnCollector {
79 exprs_to_wrap: Vec<ast::Expr>,
80}
81
82impl TailReturnCollector {
83 fn new() -> Self {
84 Self { exprs_to_wrap: vec![] }
85 }
86 /// Collect all`return` expression
87 fn collect_jump_exprs(&mut self, block_expr: &BlockExpr, collect_break: bool) {
88 let statements = block_expr.statements();
89 for stmt in statements {
90 let expr = match &stmt {
91 ast::Stmt::ExprStmt(stmt) => stmt.expr(),
92 ast::Stmt::LetStmt(stmt) => stmt.initializer(),
93 ast::Stmt::Item(_) => continue,
94 };
95 if let Some(expr) = &expr {
96 self.handle_exprs(expr, collect_break);
97 }
98 }
99
100 // Browse tail expressions for each block
101 if let Some(expr) = block_expr.expr() {
102 if let Some(last_exprs) = get_tail_expr_from_block(&expr) {
103 for last_expr in last_exprs {
104 let last_expr = match last_expr {
105 NodeType::Node(expr) => expr,
106 NodeType::Leaf(expr) => expr.syntax().clone(),
107 };
108
109 if let Some(last_expr) = Expr::cast(last_expr.clone()) {
110 self.handle_exprs(&last_expr, collect_break);
111 } else if let Some(expr_stmt) = ast::Stmt::cast(last_expr) {
112 let expr_stmt = match &expr_stmt {
113 ast::Stmt::ExprStmt(stmt) => stmt.expr(),
114 ast::Stmt::LetStmt(stmt) => stmt.initializer(),
115 ast::Stmt::Item(_) => None,
116 };
117 if let Some(expr) = &expr_stmt {
118 self.handle_exprs(expr, collect_break);
119 }
120 }
121 }
122 }
123 }
124 }
125
126 fn handle_exprs(&mut self, expr: &Expr, collect_break: bool) {
127 match expr {
128 Expr::BlockExpr(block_expr) => {
129 self.collect_jump_exprs(&block_expr, collect_break);
130 }
131 Expr::ReturnExpr(ret_expr) => {
132 if let Some(ret_expr_arg) = &ret_expr.expr() {
133 self.exprs_to_wrap.push(ret_expr_arg.clone());
134 }
135 }
136 Expr::BreakExpr(break_expr) if collect_break => {
137 if let Some(break_expr_arg) = &break_expr.expr() {
138 self.exprs_to_wrap.push(break_expr_arg.clone());
139 }
140 }
141 Expr::IfExpr(if_expr) => {
142 for block in if_expr.blocks() {
143 self.collect_jump_exprs(&block, collect_break);
144 }
145 }
146 Expr::LoopExpr(loop_expr) => {
147 if let Some(block_expr) = loop_expr.loop_body() {
148 self.collect_jump_exprs(&block_expr, collect_break);
149 }
150 }
151 Expr::ForExpr(for_expr) => {
152 if let Some(block_expr) = for_expr.loop_body() {
153 self.collect_jump_exprs(&block_expr, collect_break);
154 }
155 }
156 Expr::WhileExpr(while_expr) => {
157 if let Some(block_expr) = while_expr.loop_body() {
158 self.collect_jump_exprs(&block_expr, collect_break);
159 }
160 }
161 Expr::MatchExpr(match_expr) => {
162 if let Some(arm_list) = match_expr.match_arm_list() {
163 arm_list.arms().filter_map(|match_arm| match_arm.expr()).for_each(|expr| {
164 self.handle_exprs(&expr, collect_break);
165 });
166 }
167 }
168 _ => {}
169 }
170 }
171
172 fn collect_tail_exprs(&mut self, block: &BlockExpr) {
173 if let Some(expr) = block.expr() {
174 self.handle_exprs(&expr, true);
175 self.fetch_tail_exprs(&expr);
176 }
177 }
178
179 fn fetch_tail_exprs(&mut self, expr: &Expr) {
180 if let Some(exprs) = get_tail_expr_from_block(expr) {
181 for node_type in &exprs {
182 match node_type {
183 NodeType::Leaf(expr) => {
184 self.exprs_to_wrap.push(expr.clone());
185 }
186 NodeType::Node(expr) => {
187 if let Some(last_expr) = Expr::cast(expr.clone()) {
188 self.fetch_tail_exprs(&last_expr);
189 }
190 }
191 }
192 }
193 }
194 }
195}
196
197#[derive(Debug)]
198enum NodeType {
199 Leaf(ast::Expr),
200 Node(SyntaxNode),
201}
202
203/// Get a tail expression inside a block
204fn get_tail_expr_from_block(expr: &Expr) -> Option<Vec<NodeType>> {
205 match expr {
206 Expr::IfExpr(if_expr) => {
207 let mut nodes = vec![];
208 for block in if_expr.blocks() {
209 if let Some(block_expr) = block.expr() {
210 if let Some(tail_exprs) = get_tail_expr_from_block(&block_expr) {
211 nodes.extend(tail_exprs);
212 }
213 } else if let Some(last_expr) = block.syntax().last_child() {
214 nodes.push(NodeType::Node(last_expr));
215 } else {
216 nodes.push(NodeType::Node(block.syntax().clone()));
217 }
218 }
219 Some(nodes)
220 }
221 Expr::LoopExpr(loop_expr) => {
222 loop_expr.syntax().last_child().map(|lc| vec![NodeType::Node(lc)])
223 }
224 Expr::ForExpr(for_expr) => {
225 for_expr.syntax().last_child().map(|lc| vec![NodeType::Node(lc)])
226 }
227 Expr::WhileExpr(while_expr) => {
228 while_expr.syntax().last_child().map(|lc| vec![NodeType::Node(lc)])
229 }
230 Expr::BlockExpr(block_expr) => {
231 block_expr.expr().map(|lc| vec![NodeType::Node(lc.syntax().clone())])
232 }
233 Expr::MatchExpr(match_expr) => {
234 let arm_list = match_expr.match_arm_list()?;
235 let arms: Vec<NodeType> = arm_list
236 .arms()
237 .filter_map(|match_arm| match_arm.expr())
238 .map(|expr| match expr {
239 Expr::ReturnExpr(ret_expr) => NodeType::Node(ret_expr.syntax().clone()),
240 Expr::BreakExpr(break_expr) => NodeType::Node(break_expr.syntax().clone()),
241 _ => match expr.syntax().last_child() {
242 Some(last_expr) => NodeType::Node(last_expr),
243 None => NodeType::Node(expr.syntax().clone()),
244 },
245 })
246 .collect();
247
248 Some(arms)
249 }
250 Expr::BreakExpr(expr) => expr.expr().map(|e| vec![NodeType::Leaf(e)]),
251 Expr::ReturnExpr(ret_expr) => Some(vec![NodeType::Node(ret_expr.syntax().clone())]),
252
253 Expr::CallExpr(_)
254 | Expr::Literal(_)
255 | Expr::TupleExpr(_)
256 | Expr::ArrayExpr(_)
257 | Expr::ParenExpr(_)
258 | Expr::PathExpr(_)
259 | Expr::RecordExpr(_)
260 | Expr::IndexExpr(_)
261 | Expr::MethodCallExpr(_)
262 | Expr::AwaitExpr(_)
263 | Expr::CastExpr(_)
264 | Expr::RefExpr(_)
265 | Expr::PrefixExpr(_)
266 | Expr::RangeExpr(_)
267 | Expr::BinExpr(_)
268 | Expr::MacroCall(_)
269 | Expr::BoxExpr(_) => Some(vec![NodeType::Leaf(expr.clone())]),
270 _ => None,
271 }
272}
273
274#[cfg(test)]
275mod tests {
276 use crate::tests::{check_assist, check_assist_not_applicable};
277
278 use super::*;
279
280 #[test]
281 fn change_return_type_to_result_simple() {
282 check_assist(
283 change_return_type_to_result,
284 r#"fn foo() -> i3<|>2 {
285 let test = "test";
286 return 42i32;
287 }"#,
288 r#"fn foo() -> Result<i32, ${0:_}> {
289 let test = "test";
290 return Ok(42i32);
291 }"#,
292 );
293 }
294
295 #[test]
296 fn change_return_type_to_result_simple_closure() {
297 check_assist(
298 change_return_type_to_result,
299 r#"fn foo() {
300 || -> i32<|> {
301 let test = "test";
302 return 42i32;
303 };
304 }"#,
305 r#"fn foo() {
306 || -> Result<i32, ${0:_}> {
307 let test = "test";
308 return Ok(42i32);
309 };
310 }"#,
311 );
312 }
313
314 #[test]
315 fn change_return_type_to_result_simple_return_type_bad_cursor() {
316 check_assist_not_applicable(
317 change_return_type_to_result,
318 r#"fn foo() -> i32 {
319 let test = "test";<|>
320 return 42i32;
321 }"#,
322 );
323 }
324
325 #[test]
326 fn change_return_type_to_result_simple_return_type_bad_cursor_closure() {
327 check_assist_not_applicable(
328 change_return_type_to_result,
329 r#"fn foo() {
330 || -> i32 {
331 let test = "test";<|>
332 return 42i32;
333 };
334 }"#,
335 );
336 }
337
338 #[test]
339 fn change_return_type_to_result_closure_non_block() {
340 check_assist_not_applicable(
341 change_return_type_to_result,
342 r#"fn foo() {
343 || -> i<|>32 3;
344 }"#,
345 );
346 }
347
348 #[test]
349 fn change_return_type_to_result_simple_return_type_already_result_std() {
350 check_assist_not_applicable(
351 change_return_type_to_result,
352 r#"fn foo() -> std::result::Result<i32<|>, String> {
353 let test = "test";
354 return 42i32;
355 }"#,
356 );
357 }
358
359 #[test]
360 fn change_return_type_to_result_simple_return_type_already_result() {
361 mark::check!(change_return_type_to_result_simple_return_type_already_result);
362 check_assist_not_applicable(
363 change_return_type_to_result,
364 r#"fn foo() -> Result<i32<|>, String> {
365 let test = "test";
366 return 42i32;
367 }"#,
368 );
369 }
370
371 #[test]
372 fn change_return_type_to_result_simple_return_type_already_result_closure() {
373 check_assist_not_applicable(
374 change_return_type_to_result,
375 r#"fn foo() {
376 || -> Result<i32<|>, String> {
377 let test = "test";
378 return 42i32;
379 };
380 }"#,
381 );
382 }
383
384 #[test]
385 fn change_return_type_to_result_simple_with_cursor() {
386 check_assist(
387 change_return_type_to_result,
388 r#"fn foo() -> <|>i32 {
389 let test = "test";
390 return 42i32;
391 }"#,
392 r#"fn foo() -> Result<i32, ${0:_}> {
393 let test = "test";
394 return Ok(42i32);
395 }"#,
396 );
397 }
398
399 #[test]
400 fn change_return_type_to_result_simple_with_tail() {
401 check_assist(
402 change_return_type_to_result,
403 r#"fn foo() -><|> i32 {
404 let test = "test";
405 42i32
406 }"#,
407 r#"fn foo() -> Result<i32, ${0:_}> {
408 let test = "test";
409 Ok(42i32)
410 }"#,
411 );
412 }
413
414 #[test]
415 fn change_return_type_to_result_simple_with_tail_closure() {
416 check_assist(
417 change_return_type_to_result,
418 r#"fn foo() {
419 || -><|> i32 {
420 let test = "test";
421 42i32
422 };
423 }"#,
424 r#"fn foo() {
425 || -> Result<i32, ${0:_}> {
426 let test = "test";
427 Ok(42i32)
428 };
429 }"#,
430 );
431 }
432
433 #[test]
434 fn change_return_type_to_result_simple_with_tail_only() {
435 check_assist(
436 change_return_type_to_result,
437 r#"fn foo() -> i32<|> {
438 42i32
439 }"#,
440 r#"fn foo() -> Result<i32, ${0:_}> {
441 Ok(42i32)
442 }"#,
443 );
444 }
445
446 #[test]
447 fn change_return_type_to_result_simple_with_tail_block_like() {
448 check_assist(
449 change_return_type_to_result,
450 r#"fn foo() -> i32<|> {
451 if true {
452 42i32
453 } else {
454 24i32
455 }
456 }"#,
457 r#"fn foo() -> Result<i32, ${0:_}> {
458 if true {
459 Ok(42i32)
460 } else {
461 Ok(24i32)
462 }
463 }"#,
464 );
465 }
466
467 #[test]
468 fn change_return_type_to_result_simple_without_block_closure() {
469 check_assist(
470 change_return_type_to_result,
471 r#"fn foo() {
472 || -> i32<|> {
473 if true {
474 42i32
475 } else {
476 24i32
477 }
478 };
479 }"#,
480 r#"fn foo() {
481 || -> Result<i32, ${0:_}> {
482 if true {
483 Ok(42i32)
484 } else {
485 Ok(24i32)
486 }
487 };
488 }"#,
489 );
490 }
491
492 #[test]
493 fn change_return_type_to_result_simple_with_nested_if() {
494 check_assist(
495 change_return_type_to_result,
496 r#"fn foo() -> i32<|> {
497 if true {
498 if false {
499 1
500 } else {
501 2
502 }
503 } else {
504 24i32
505 }
506 }"#,
507 r#"fn foo() -> Result<i32, ${0:_}> {
508 if true {
509 if false {
510 Ok(1)
511 } else {
512 Ok(2)
513 }
514 } else {
515 Ok(24i32)
516 }
517 }"#,
518 );
519 }
520
521 #[test]
522 fn change_return_type_to_result_simple_with_await() {
523 check_assist(
524 change_return_type_to_result,
525 r#"async fn foo() -> i<|>32 {
526 if true {
527 if false {
528 1.await
529 } else {
530 2.await
531 }
532 } else {
533 24i32.await
534 }
535 }"#,
536 r#"async fn foo() -> Result<i32, ${0:_}> {
537 if true {
538 if false {
539 Ok(1.await)
540 } else {
541 Ok(2.await)
542 }
543 } else {
544 Ok(24i32.await)
545 }
546 }"#,
547 );
548 }
549
550 #[test]
551 fn change_return_type_to_result_simple_with_array() {
552 check_assist(
553 change_return_type_to_result,
554 r#"fn foo() -> [i32;<|> 3] {
555 [1, 2, 3]
556 }"#,
557 r#"fn foo() -> Result<[i32; 3], ${0:_}> {
558 Ok([1, 2, 3])
559 }"#,
560 );
561 }
562
563 #[test]
564 fn change_return_type_to_result_simple_with_cast() {
565 check_assist(
566 change_return_type_to_result,
567 r#"fn foo() -<|>> i32 {
568 if true {
569 if false {
570 1 as i32
571 } else {
572 2 as i32
573 }
574 } else {
575 24 as i32
576 }
577 }"#,
578 r#"fn foo() -> Result<i32, ${0:_}> {
579 if true {
580 if false {
581 Ok(1 as i32)
582 } else {
583 Ok(2 as i32)
584 }
585 } else {
586 Ok(24 as i32)
587 }
588 }"#,
589 );
590 }
591
592 #[test]
593 fn change_return_type_to_result_simple_with_tail_block_like_match() {
594 check_assist(
595 change_return_type_to_result,
596 r#"fn foo() -> i32<|> {
597 let my_var = 5;
598 match my_var {
599 5 => 42i32,
600 _ => 24i32,
601 }
602 }"#,
603 r#"fn foo() -> Result<i32, ${0:_}> {
604 let my_var = 5;
605 match my_var {
606 5 => Ok(42i32),
607 _ => Ok(24i32),
608 }
609 }"#,
610 );
611 }
612
613 #[test]
614 fn change_return_type_to_result_simple_with_loop_with_tail() {
615 check_assist(
616 change_return_type_to_result,
617 r#"fn foo() -> i32<|> {
618 let my_var = 5;
619 loop {
620 println!("test");
621 5
622 }
623
624 my_var
625 }"#,
626 r#"fn foo() -> Result<i32, ${0:_}> {
627 let my_var = 5;
628 loop {
629 println!("test");
630 5
631 }
632
633 Ok(my_var)
634 }"#,
635 );
636 }
637
638 #[test]
639 fn change_return_type_to_result_simple_with_loop_in_let_stmt() {
640 check_assist(
641 change_return_type_to_result,
642 r#"fn foo() -> i32<|> {
643 let my_var = let x = loop {
644 break 1;
645 };
646
647 my_var
648 }"#,
649 r#"fn foo() -> Result<i32, ${0:_}> {
650 let my_var = let x = loop {
651 break 1;
652 };
653
654 Ok(my_var)
655 }"#,
656 );
657 }
658
659 #[test]
660 fn change_return_type_to_result_simple_with_tail_block_like_match_return_expr() {
661 check_assist(
662 change_return_type_to_result,
663 r#"fn foo() -> i32<|> {
664 let my_var = 5;
665 let res = match my_var {
666 5 => 42i32,
667 _ => return 24i32,
668 };
669
670 res
671 }"#,
672 r#"fn foo() -> Result<i32, ${0:_}> {
673 let my_var = 5;
674 let res = match my_var {
675 5 => 42i32,
676 _ => return Ok(24i32),
677 };
678
679 Ok(res)
680 }"#,
681 );
682
683 check_assist(
684 change_return_type_to_result,
685 r#"fn foo() -> i32<|> {
686 let my_var = 5;
687 let res = if my_var == 5 {
688 42i32
689 } else {
690 return 24i32;
691 };
692
693 res
694 }"#,
695 r#"fn foo() -> Result<i32, ${0:_}> {
696 let my_var = 5;
697 let res = if my_var == 5 {
698 42i32
699 } else {
700 return Ok(24i32);
701 };
702
703 Ok(res)
704 }"#,
705 );
706 }
707
708 #[test]
709 fn change_return_type_to_result_simple_with_tail_block_like_match_deeper() {
710 check_assist(
711 change_return_type_to_result,
712 r#"fn foo() -> i32<|> {
713 let my_var = 5;
714 match my_var {
715 5 => {
716 if true {
717 42i32
718 } else {
719 25i32
720 }
721 },
722 _ => {
723 let test = "test";
724 if test == "test" {
725 return bar();
726 }
727 53i32
728 },
729 }
730 }"#,
731 r#"fn foo() -> Result<i32, ${0:_}> {
732 let my_var = 5;
733 match my_var {
734 5 => {
735 if true {
736 Ok(42i32)
737 } else {
738 Ok(25i32)
739 }
740 },
741 _ => {
742 let test = "test";
743 if test == "test" {
744 return Ok(bar());
745 }
746 Ok(53i32)
747 },
748 }
749 }"#,
750 );
751 }
752
753 #[test]
754 fn change_return_type_to_result_simple_with_tail_block_like_early_return() {
755 check_assist(
756 change_return_type_to_result,
757 r#"fn foo() -> i<|>32 {
758 let test = "test";
759 if test == "test" {
760 return 24i32;
761 }
762 53i32
763 }"#,
764 r#"fn foo() -> Result<i32, ${0:_}> {
765 let test = "test";
766 if test == "test" {
767 return Ok(24i32);
768 }
769 Ok(53i32)
770 }"#,
771 );
772 }
773
774 #[test]
775 fn change_return_type_to_result_simple_with_closure() {
776 check_assist(
777 change_return_type_to_result,
778 r#"fn foo(the_field: u32) -><|> u32 {
779 let true_closure = || {
780 return true;
781 };
782 if the_field < 5 {
783 let mut i = 0;
784
785
786 if true_closure() {
787 return 99;
788 } else {
789 return 0;
790 }
791 }
792
793 the_field
794 }"#,
795 r#"fn foo(the_field: u32) -> Result<u32, ${0:_}> {
796 let true_closure = || {
797 return true;
798 };
799 if the_field < 5 {
800 let mut i = 0;
801
802
803 if true_closure() {
804 return Ok(99);
805 } else {
806 return Ok(0);
807 }
808 }
809
810 Ok(the_field)
811 }"#,
812 );
813
814 check_assist(
815 change_return_type_to_result,
816 r#"fn foo(the_field: u32) -> u32<|> {
817 let true_closure = || {
818 return true;
819 };
820 if the_field < 5 {
821 let mut i = 0;
822
823
824 if true_closure() {
825 return 99;
826 } else {
827 return 0;
828 }
829 }
830 let t = None;
831
832 t.unwrap_or_else(|| the_field)
833 }"#,
834 r#"fn foo(the_field: u32) -> Result<u32, ${0:_}> {
835 let true_closure = || {
836 return true;
837 };
838 if the_field < 5 {
839 let mut i = 0;
840
841
842 if true_closure() {
843 return Ok(99);
844 } else {
845 return Ok(0);
846 }
847 }
848 let t = None;
849
850 Ok(t.unwrap_or_else(|| the_field))
851 }"#,
852 );
853 }
854
855 #[test]
856 fn change_return_type_to_result_simple_with_weird_forms() {
857 check_assist(
858 change_return_type_to_result,
859 r#"fn foo() -> i32<|> {
860 let test = "test";
861 if test == "test" {
862 return 24i32;
863 }
864 let mut i = 0;
865 loop {
866 if i == 1 {
867 break 55;
868 }
869 i += 1;
870 }
871 }"#,
872 r#"fn foo() -> Result<i32, ${0:_}> {
873 let test = "test";
874 if test == "test" {
875 return Ok(24i32);
876 }
877 let mut i = 0;
878 loop {
879 if i == 1 {
880 break Ok(55);
881 }
882 i += 1;
883 }
884 }"#,
885 );
886
887 check_assist(
888 change_return_type_to_result,
889 r#"fn foo() -> i32<|> {
890 let test = "test";
891 if test == "test" {
892 return 24i32;
893 }
894 let mut i = 0;
895 loop {
896 loop {
897 if i == 1 {
898 break 55;
899 }
900 i += 1;
901 }
902 }
903 }"#,
904 r#"fn foo() -> Result<i32, ${0:_}> {
905 let test = "test";
906 if test == "test" {
907 return Ok(24i32);
908 }
909 let mut i = 0;
910 loop {
911 loop {
912 if i == 1 {
913 break Ok(55);
914 }
915 i += 1;
916 }
917 }
918 }"#,
919 );
920
921 check_assist(
922 change_return_type_to_result,
923 r#"fn foo() -> i3<|>2 {
924 let test = "test";
925 let other = 5;
926 if test == "test" {
927 let res = match other {
928 5 => 43,
929 _ => return 56,
930 };
931 }
932 let mut i = 0;
933 loop {
934 loop {
935 if i == 1 {
936 break 55;
937 }
938 i += 1;
939 }
940 }
941 }"#,
942 r#"fn foo() -> Result<i32, ${0:_}> {
943 let test = "test";
944 let other = 5;
945 if test == "test" {
946 let res = match other {
947 5 => 43,
948 _ => return Ok(56),
949 };
950 }
951 let mut i = 0;
952 loop {
953 loop {
954 if i == 1 {
955 break Ok(55);
956 }
957 i += 1;
958 }
959 }
960 }"#,
961 );
962
963 check_assist(
964 change_return_type_to_result,
965 r#"fn foo(the_field: u32) -> u32<|> {
966 if the_field < 5 {
967 let mut i = 0;
968 loop {
969 if i > 5 {
970 return 55u32;
971 }
972 i += 3;
973 }
974
975 match i {
976 5 => return 99,
977 _ => return 0,
978 };
979 }
980
981 the_field
982 }"#,
983 r#"fn foo(the_field: u32) -> Result<u32, ${0:_}> {
984 if the_field < 5 {
985 let mut i = 0;
986 loop {
987 if i > 5 {
988 return Ok(55u32);
989 }
990 i += 3;
991 }
992
993 match i {
994 5 => return Ok(99),
995 _ => return Ok(0),
996 };
997 }
998
999 Ok(the_field)
1000 }"#,
1001 );
1002
1003 check_assist(
1004 change_return_type_to_result,
1005 r#"fn foo(the_field: u32) -> u3<|>2 {
1006 if the_field < 5 {
1007 let mut i = 0;
1008
1009 match i {
1010 5 => return 99,
1011 _ => return 0,
1012 }
1013 }
1014
1015 the_field
1016 }"#,
1017 r#"fn foo(the_field: u32) -> Result<u32, ${0:_}> {
1018 if the_field < 5 {
1019 let mut i = 0;
1020
1021 match i {
1022 5 => return Ok(99),
1023 _ => return Ok(0),
1024 }
1025 }
1026
1027 Ok(the_field)
1028 }"#,
1029 );
1030
1031 check_assist(
1032 change_return_type_to_result,
1033 r#"fn foo(the_field: u32) -> u32<|> {
1034 if the_field < 5 {
1035 let mut i = 0;
1036
1037 if i == 5 {
1038 return 99
1039 } else {
1040 return 0
1041 }
1042 }
1043
1044 the_field
1045 }"#,
1046 r#"fn foo(the_field: u32) -> Result<u32, ${0:_}> {
1047 if the_field < 5 {
1048 let mut i = 0;
1049
1050 if i == 5 {
1051 return Ok(99)
1052 } else {
1053 return Ok(0)
1054 }
1055 }
1056
1057 Ok(the_field)
1058 }"#,
1059 );
1060
1061 check_assist(
1062 change_return_type_to_result,
1063 r#"fn foo(the_field: u32) -> <|>u32 {
1064 if the_field < 5 {
1065 let mut i = 0;
1066
1067 if i == 5 {
1068 return 99;
1069 } else {
1070 return 0;
1071 }
1072 }
1073
1074 the_field
1075 }"#,
1076 r#"fn foo(the_field: u32) -> Result<u32, ${0:_}> {
1077 if the_field < 5 {
1078 let mut i = 0;
1079
1080 if i == 5 {
1081 return Ok(99);
1082 } else {
1083 return Ok(0);
1084 }
1085 }
1086
1087 Ok(the_field)
1088 }"#,
1089 );
1090 }
1091}
diff --git a/crates/assists/src/handlers/add_custom_impl.rs b/crates/assists/src/handlers/replace_derive_with_manual_impl.rs
index c13493fd8..82625516c 100644
--- a/crates/assists/src/handlers/add_custom_impl.rs
+++ b/crates/assists/src/handlers/replace_derive_with_manual_impl.rs
@@ -16,24 +16,31 @@ use crate::{
16 AssistId, AssistKind, 16 AssistId, AssistKind,
17}; 17};
18 18
19// Assist: add_custom_impl 19// Assist: replace_derive_with_manual_impl
20// 20//
21// Adds impl block for derived trait. 21// Converts a `derive` impl into a manual one.
22// 22//
23// ``` 23// ```
24// # trait Debug { fn fmt(&self, f: &mut Formatter) -> Result<()>; }
24// #[derive(Deb<|>ug, Display)] 25// #[derive(Deb<|>ug, Display)]
25// struct S; 26// struct S;
26// ``` 27// ```
27// -> 28// ->
28// ``` 29// ```
30// # trait Debug { fn fmt(&self, f: &mut Formatter) -> Result<()>; }
29// #[derive(Display)] 31// #[derive(Display)]
30// struct S; 32// struct S;
31// 33//
32// impl Debug for S { 34// impl Debug for S {
33// $0 35// fn fmt(&self, f: &mut Formatter) -> Result<()> {
36// ${0:todo!()}
37// }
34// } 38// }
35// ``` 39// ```
36pub(crate) fn add_custom_impl(acc: &mut Assists, ctx: &AssistContext) -> Option<()> { 40pub(crate) fn replace_derive_with_manual_impl(
41 acc: &mut Assists,
42 ctx: &AssistContext,
43) -> Option<()> {
37 let attr = ctx.find_node_at_offset::<ast::Attr>()?; 44 let attr = ctx.find_node_at_offset::<ast::Attr>()?;
38 45
39 let attr_name = attr 46 let attr_name = attr
@@ -90,43 +97,49 @@ fn add_assist(
90) -> Option<()> { 97) -> Option<()> {
91 let target = attr.syntax().text_range(); 98 let target = attr.syntax().text_range();
92 let input = attr.token_tree()?; 99 let input = attr.token_tree()?;
93 let label = format!("Add custom impl `{}` for `{}`", trait_path, annotated_name); 100 let label = format!("Convert to manual `impl {} for {}`", trait_path, annotated_name);
94 let trait_name = trait_path.segment().and_then(|seg| seg.name_ref())?; 101 let trait_name = trait_path.segment().and_then(|seg| seg.name_ref())?;
95 102
96 acc.add(AssistId("add_custom_impl", AssistKind::Refactor), label, target, |builder| { 103 acc.add(
97 let impl_def_with_items = 104 AssistId("replace_derive_with_manual_impl", AssistKind::Refactor),
98 impl_def_from_trait(&ctx.sema, annotated_name, trait_, trait_path); 105 label,
99 update_attribute(builder, &input, &trait_name, &attr); 106 target,
100 match (ctx.config.snippet_cap, impl_def_with_items) { 107 |builder| {
101 (None, _) => builder.insert( 108 let impl_def_with_items =
102 insert_pos, 109 impl_def_from_trait(&ctx.sema, annotated_name, trait_, trait_path);
103 format!("\n\nimpl {} for {} {{\n\n}}", trait_path, annotated_name), 110 update_attribute(builder, &input, &trait_name, &attr);
104 ), 111 match (ctx.config.snippet_cap, impl_def_with_items) {
105 (Some(cap), None) => builder.insert_snippet( 112 (None, _) => builder.insert(
106 cap, 113 insert_pos,
107 insert_pos, 114 format!("\n\nimpl {} for {} {{\n\n}}", trait_path, annotated_name),
108 format!("\n\nimpl {} for {} {{\n $0\n}}", trait_path, annotated_name), 115 ),
109 ), 116 (Some(cap), None) => builder.insert_snippet(
110 (Some(cap), Some((impl_def, first_assoc_item))) => { 117 cap,
111 let mut cursor = Cursor::Before(first_assoc_item.syntax()); 118 insert_pos,
112 let placeholder; 119 format!("\n\nimpl {} for {} {{\n $0\n}}", trait_path, annotated_name),
113 if let ast::AssocItem::Fn(ref func) = first_assoc_item { 120 ),
114 if let Some(m) = func.syntax().descendants().find_map(ast::MacroCall::cast) { 121 (Some(cap), Some((impl_def, first_assoc_item))) => {
115 if m.syntax().text() == "todo!()" { 122 let mut cursor = Cursor::Before(first_assoc_item.syntax());
116 placeholder = m; 123 let placeholder;
117 cursor = Cursor::Replace(placeholder.syntax()); 124 if let ast::AssocItem::Fn(ref func) = first_assoc_item {
125 if let Some(m) = func.syntax().descendants().find_map(ast::MacroCall::cast)
126 {
127 if m.syntax().text() == "todo!()" {
128 placeholder = m;
129 cursor = Cursor::Replace(placeholder.syntax());
130 }
118 } 131 }
119 } 132 }
120 }
121 133
122 builder.insert_snippet( 134 builder.insert_snippet(
123 cap, 135 cap,
124 insert_pos, 136 insert_pos,
125 format!("\n\n{}", render_snippet(cap, impl_def.syntax(), cursor)), 137 format!("\n\n{}", render_snippet(cap, impl_def.syntax(), cursor)),
126 ) 138 )
127 } 139 }
128 }; 140 };
129 }) 141 },
142 )
130} 143}
131 144
132fn impl_def_from_trait( 145fn impl_def_from_trait(
@@ -192,7 +205,7 @@ mod tests {
192 #[test] 205 #[test]
193 fn add_custom_impl_debug() { 206 fn add_custom_impl_debug() {
194 check_assist( 207 check_assist(
195 add_custom_impl, 208 replace_derive_with_manual_impl,
196 " 209 "
197mod fmt { 210mod fmt {
198 pub struct Error; 211 pub struct Error;
@@ -233,7 +246,7 @@ impl fmt::Debug for Foo {
233 #[test] 246 #[test]
234 fn add_custom_impl_all() { 247 fn add_custom_impl_all() {
235 check_assist( 248 check_assist(
236 add_custom_impl, 249 replace_derive_with_manual_impl,
237 " 250 "
238mod foo { 251mod foo {
239 pub trait Bar { 252 pub trait Bar {
@@ -282,7 +295,7 @@ impl foo::Bar for Foo {
282 #[test] 295 #[test]
283 fn add_custom_impl_for_unique_input() { 296 fn add_custom_impl_for_unique_input() {
284 check_assist( 297 check_assist(
285 add_custom_impl, 298 replace_derive_with_manual_impl,
286 " 299 "
287#[derive(Debu<|>g)] 300#[derive(Debu<|>g)]
288struct Foo { 301struct Foo {
@@ -304,7 +317,7 @@ impl Debug for Foo {
304 #[test] 317 #[test]
305 fn add_custom_impl_for_with_visibility_modifier() { 318 fn add_custom_impl_for_with_visibility_modifier() {
306 check_assist( 319 check_assist(
307 add_custom_impl, 320 replace_derive_with_manual_impl,
308 " 321 "
309#[derive(Debug<|>)] 322#[derive(Debug<|>)]
310pub struct Foo { 323pub struct Foo {
@@ -326,7 +339,7 @@ impl Debug for Foo {
326 #[test] 339 #[test]
327 fn add_custom_impl_when_multiple_inputs() { 340 fn add_custom_impl_when_multiple_inputs() {
328 check_assist( 341 check_assist(
329 add_custom_impl, 342 replace_derive_with_manual_impl,
330 " 343 "
331#[derive(Display, Debug<|>, Serialize)] 344#[derive(Display, Debug<|>, Serialize)]
332struct Foo {} 345struct Foo {}
@@ -345,7 +358,7 @@ impl Debug for Foo {
345 #[test] 358 #[test]
346 fn test_ignore_derive_macro_without_input() { 359 fn test_ignore_derive_macro_without_input() {
347 check_assist_not_applicable( 360 check_assist_not_applicable(
348 add_custom_impl, 361 replace_derive_with_manual_impl,
349 " 362 "
350#[derive(<|>)] 363#[derive(<|>)]
351struct Foo {} 364struct Foo {}
@@ -356,7 +369,7 @@ struct Foo {}
356 #[test] 369 #[test]
357 fn test_ignore_if_cursor_on_param() { 370 fn test_ignore_if_cursor_on_param() {
358 check_assist_not_applicable( 371 check_assist_not_applicable(
359 add_custom_impl, 372 replace_derive_with_manual_impl,
360 " 373 "
361#[derive<|>(Debug)] 374#[derive<|>(Debug)]
362struct Foo {} 375struct Foo {}
@@ -364,7 +377,7 @@ struct Foo {}
364 ); 377 );
365 378
366 check_assist_not_applicable( 379 check_assist_not_applicable(
367 add_custom_impl, 380 replace_derive_with_manual_impl,
368 " 381 "
369#[derive(Debug)<|>] 382#[derive(Debug)<|>]
370struct Foo {} 383struct Foo {}
@@ -375,7 +388,7 @@ struct Foo {}
375 #[test] 388 #[test]
376 fn test_ignore_if_not_derive() { 389 fn test_ignore_if_not_derive() {
377 check_assist_not_applicable( 390 check_assist_not_applicable(
378 add_custom_impl, 391 replace_derive_with_manual_impl,
379 " 392 "
380#[allow(non_camel_<|>case_types)] 393#[allow(non_camel_<|>case_types)]
381struct Foo {} 394struct Foo {}
diff --git a/crates/assists/src/handlers/wrap_return_type_in_result.rs b/crates/assists/src/handlers/wrap_return_type_in_result.rs
new file mode 100644
index 000000000..59e5debb1
--- /dev/null
+++ b/crates/assists/src/handlers/wrap_return_type_in_result.rs
@@ -0,0 +1,1158 @@
1use std::iter;
2
3use syntax::{
4 ast::{self, make, BlockExpr, Expr, LoopBodyOwner},
5 match_ast, AstNode, SyntaxNode,
6};
7use test_utils::mark;
8
9use crate::{AssistContext, AssistId, AssistKind, Assists};
10
11// Assist: wrap_return_type_in_result
12//
13// Wrap the function's return type into Result.
14//
15// ```
16// fn foo() -> i32<|> { 42i32 }
17// ```
18// ->
19// ```
20// fn foo() -> Result<i32, ${0:_}> { Ok(42i32) }
21// ```
22pub(crate) fn wrap_return_type_in_result(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
23 let ret_type = ctx.find_node_at_offset::<ast::RetType>()?;
24 let parent = ret_type.syntax().parent()?;
25 let block_expr = match_ast! {
26 match parent {
27 ast::Fn(func) => func.body()?,
28 ast::ClosureExpr(closure) => match closure.body()? {
29 Expr::BlockExpr(block) => block,
30 // closures require a block when a return type is specified
31 _ => return None,
32 },
33 _ => return None,
34 }
35 };
36
37 let type_ref = &ret_type.ty()?;
38 let ret_type_str = type_ref.syntax().text().to_string();
39 let first_part_ret_type = ret_type_str.splitn(2, '<').next();
40 if let Some(ret_type_first_part) = first_part_ret_type {
41 if ret_type_first_part.ends_with("Result") {
42 mark::hit!(wrap_return_type_in_result_simple_return_type_already_result);
43 return None;
44 }
45 }
46
47 acc.add(
48 AssistId("wrap_return_type_in_result", AssistKind::RefactorRewrite),
49 "Wrap return type in Result",
50 type_ref.syntax().text_range(),
51 |builder| {
52 let mut tail_return_expr_collector = TailReturnCollector::new();
53 tail_return_expr_collector.collect_jump_exprs(&block_expr, false);
54 tail_return_expr_collector.collect_tail_exprs(&block_expr);
55
56 for ret_expr_arg in tail_return_expr_collector.exprs_to_wrap {
57 let ok_wrapped = make::expr_call(
58 make::expr_path(make::path_unqualified(make::path_segment(make::name_ref(
59 "Ok",
60 )))),
61 make::arg_list(iter::once(ret_expr_arg.clone())),
62 );
63 builder.replace_ast(ret_expr_arg, ok_wrapped);
64 }
65
66 match ctx.config.snippet_cap {
67 Some(cap) => {
68 let snippet = format!("Result<{}, ${{0:_}}>", type_ref);
69 builder.replace_snippet(cap, type_ref.syntax().text_range(), snippet)
70 }
71 None => builder
72 .replace(type_ref.syntax().text_range(), format!("Result<{}, _>", type_ref)),
73 }
74 },
75 )
76}
77
78struct TailReturnCollector {
79 exprs_to_wrap: Vec<ast::Expr>,
80}
81
82impl TailReturnCollector {
83 fn new() -> Self {
84 Self { exprs_to_wrap: vec![] }
85 }
86 /// Collect all`return` expression
87 fn collect_jump_exprs(&mut self, block_expr: &BlockExpr, collect_break: bool) {
88 let statements = block_expr.statements();
89 for stmt in statements {
90 let expr = match &stmt {
91 ast::Stmt::ExprStmt(stmt) => stmt.expr(),
92 ast::Stmt::LetStmt(stmt) => stmt.initializer(),
93 ast::Stmt::Item(_) => continue,
94 };
95 if let Some(expr) = &expr {
96 self.handle_exprs(expr, collect_break);
97 }
98 }
99
100 // Browse tail expressions for each block
101 if let Some(expr) = block_expr.expr() {
102 if let Some(last_exprs) = get_tail_expr_from_block(&expr) {
103 for last_expr in last_exprs {
104 let last_expr = match last_expr {
105 NodeType::Node(expr) => expr,
106 NodeType::Leaf(expr) => expr.syntax().clone(),
107 };
108
109 if let Some(last_expr) = Expr::cast(last_expr.clone()) {
110 self.handle_exprs(&last_expr, collect_break);
111 } else if let Some(expr_stmt) = ast::Stmt::cast(last_expr) {
112 let expr_stmt = match &expr_stmt {
113 ast::Stmt::ExprStmt(stmt) => stmt.expr(),
114 ast::Stmt::LetStmt(stmt) => stmt.initializer(),
115 ast::Stmt::Item(_) => None,
116 };
117 if let Some(expr) = &expr_stmt {
118 self.handle_exprs(expr, collect_break);
119 }
120 }
121 }
122 }
123 }
124 }
125
126 fn handle_exprs(&mut self, expr: &Expr, collect_break: bool) {
127 match expr {
128 Expr::BlockExpr(block_expr) => {
129 self.collect_jump_exprs(&block_expr, collect_break);
130 }
131 Expr::ReturnExpr(ret_expr) => {
132 if let Some(ret_expr_arg) = &ret_expr.expr() {
133 self.exprs_to_wrap.push(ret_expr_arg.clone());
134 }
135 }
136 Expr::BreakExpr(break_expr) if collect_break => {
137 if let Some(break_expr_arg) = &break_expr.expr() {
138 self.exprs_to_wrap.push(break_expr_arg.clone());
139 }
140 }
141 Expr::IfExpr(if_expr) => {
142 for block in if_expr.blocks() {
143 self.collect_jump_exprs(&block, collect_break);
144 }
145 }
146 Expr::LoopExpr(loop_expr) => {
147 if let Some(block_expr) = loop_expr.loop_body() {
148 self.collect_jump_exprs(&block_expr, collect_break);
149 }
150 }
151 Expr::ForExpr(for_expr) => {
152 if let Some(block_expr) = for_expr.loop_body() {
153 self.collect_jump_exprs(&block_expr, collect_break);
154 }
155 }
156 Expr::WhileExpr(while_expr) => {
157 if let Some(block_expr) = while_expr.loop_body() {
158 self.collect_jump_exprs(&block_expr, collect_break);
159 }
160 }
161 Expr::MatchExpr(match_expr) => {
162 if let Some(arm_list) = match_expr.match_arm_list() {
163 arm_list.arms().filter_map(|match_arm| match_arm.expr()).for_each(|expr| {
164 self.handle_exprs(&expr, collect_break);
165 });
166 }
167 }
168 _ => {}
169 }
170 }
171
172 fn collect_tail_exprs(&mut self, block: &BlockExpr) {
173 if let Some(expr) = block.expr() {
174 self.handle_exprs(&expr, true);
175 self.fetch_tail_exprs(&expr);
176 }
177 }
178
179 fn fetch_tail_exprs(&mut self, expr: &Expr) {
180 if let Some(exprs) = get_tail_expr_from_block(expr) {
181 for node_type in &exprs {
182 match node_type {
183 NodeType::Leaf(expr) => {
184 self.exprs_to_wrap.push(expr.clone());
185 }
186 NodeType::Node(expr) => {
187 if let Some(last_expr) = Expr::cast(expr.clone()) {
188 self.fetch_tail_exprs(&last_expr);
189 }
190 }
191 }
192 }
193 }
194 }
195}
196
197#[derive(Debug)]
198enum NodeType {
199 Leaf(ast::Expr),
200 Node(SyntaxNode),
201}
202
203/// Get a tail expression inside a block
204fn get_tail_expr_from_block(expr: &Expr) -> Option<Vec<NodeType>> {
205 match expr {
206 Expr::IfExpr(if_expr) => {
207 let mut nodes = vec![];
208 for block in if_expr.blocks() {
209 if let Some(block_expr) = block.expr() {
210 if let Some(tail_exprs) = get_tail_expr_from_block(&block_expr) {
211 nodes.extend(tail_exprs);
212 }
213 } else if let Some(last_expr) = block.syntax().last_child() {
214 nodes.push(NodeType::Node(last_expr));
215 } else {
216 nodes.push(NodeType::Node(block.syntax().clone()));
217 }
218 }
219 Some(nodes)
220 }
221 Expr::LoopExpr(loop_expr) => {
222 loop_expr.syntax().last_child().map(|lc| vec![NodeType::Node(lc)])
223 }
224 Expr::ForExpr(for_expr) => {
225 for_expr.syntax().last_child().map(|lc| vec![NodeType::Node(lc)])
226 }
227 Expr::WhileExpr(while_expr) => {
228 while_expr.syntax().last_child().map(|lc| vec![NodeType::Node(lc)])
229 }
230 Expr::BlockExpr(block_expr) => {
231 block_expr.expr().map(|lc| vec![NodeType::Node(lc.syntax().clone())])
232 }
233 Expr::MatchExpr(match_expr) => {
234 let arm_list = match_expr.match_arm_list()?;
235 let arms: Vec<NodeType> = arm_list
236 .arms()
237 .filter_map(|match_arm| match_arm.expr())
238 .map(|expr| match expr {
239 Expr::ReturnExpr(ret_expr) => NodeType::Node(ret_expr.syntax().clone()),
240 Expr::BreakExpr(break_expr) => NodeType::Node(break_expr.syntax().clone()),
241 _ => match expr.syntax().last_child() {
242 Some(last_expr) => NodeType::Node(last_expr),
243 None => NodeType::Node(expr.syntax().clone()),
244 },
245 })
246 .collect();
247
248 Some(arms)
249 }
250 Expr::BreakExpr(expr) => expr.expr().map(|e| vec![NodeType::Leaf(e)]),
251 Expr::ReturnExpr(ret_expr) => Some(vec![NodeType::Node(ret_expr.syntax().clone())]),
252
253 Expr::CallExpr(_)
254 | Expr::Literal(_)
255 | Expr::TupleExpr(_)
256 | Expr::ArrayExpr(_)
257 | Expr::ParenExpr(_)
258 | Expr::PathExpr(_)
259 | Expr::RecordExpr(_)
260 | Expr::IndexExpr(_)
261 | Expr::MethodCallExpr(_)
262 | Expr::AwaitExpr(_)
263 | Expr::CastExpr(_)
264 | Expr::RefExpr(_)
265 | Expr::PrefixExpr(_)
266 | Expr::RangeExpr(_)
267 | Expr::BinExpr(_)
268 | Expr::MacroCall(_)
269 | Expr::BoxExpr(_) => Some(vec![NodeType::Leaf(expr.clone())]),
270 _ => None,
271 }
272}
273
274#[cfg(test)]
275mod tests {
276 use crate::tests::{check_assist, check_assist_not_applicable};
277
278 use super::*;
279
280 #[test]
281 fn wrap_return_type_in_result_simple() {
282 check_assist(
283 wrap_return_type_in_result,
284 r#"
285fn foo() -> i3<|>2 {
286 let test = "test";
287 return 42i32;
288}
289"#,
290 r#"
291fn foo() -> Result<i32, ${0:_}> {
292 let test = "test";
293 return Ok(42i32);
294}
295"#,
296 );
297 }
298
299 #[test]
300 fn wrap_return_type_in_result_simple_closure() {
301 check_assist(
302 wrap_return_type_in_result,
303 r#"
304fn foo() {
305 || -> i32<|> {
306 let test = "test";
307 return 42i32;
308 };
309}
310"#,
311 r#"
312fn foo() {
313 || -> Result<i32, ${0:_}> {
314 let test = "test";
315 return Ok(42i32);
316 };
317}
318"#,
319 );
320 }
321
322 #[test]
323 fn wrap_return_type_in_result_simple_return_type_bad_cursor() {
324 check_assist_not_applicable(
325 wrap_return_type_in_result,
326 r#"
327fn foo() -> i32 {
328 let test = "test";<|>
329 return 42i32;
330}
331"#,
332 );
333 }
334
335 #[test]
336 fn wrap_return_type_in_result_simple_return_type_bad_cursor_closure() {
337 check_assist_not_applicable(
338 wrap_return_type_in_result,
339 r#"
340fn foo() {
341 || -> i32 {
342 let test = "test";<|>
343 return 42i32;
344 };
345}
346"#,
347 );
348 }
349
350 #[test]
351 fn wrap_return_type_in_result_closure_non_block() {
352 check_assist_not_applicable(wrap_return_type_in_result, r#"fn foo() { || -> i<|>32 3; }"#);
353 }
354
355 #[test]
356 fn wrap_return_type_in_result_simple_return_type_already_result_std() {
357 check_assist_not_applicable(
358 wrap_return_type_in_result,
359 r#"
360fn foo() -> std::result::Result<i32<|>, String> {
361 let test = "test";
362 return 42i32;
363}
364"#,
365 );
366 }
367
368 #[test]
369 fn wrap_return_type_in_result_simple_return_type_already_result() {
370 mark::check!(wrap_return_type_in_result_simple_return_type_already_result);
371 check_assist_not_applicable(
372 wrap_return_type_in_result,
373 r#"
374fn foo() -> Result<i32<|>, String> {
375 let test = "test";
376 return 42i32;
377}
378"#,
379 );
380 }
381
382 #[test]
383 fn wrap_return_type_in_result_simple_return_type_already_result_closure() {
384 check_assist_not_applicable(
385 wrap_return_type_in_result,
386 r#"
387fn foo() {
388 || -> Result<i32<|>, String> {
389 let test = "test";
390 return 42i32;
391 };
392}
393"#,
394 );
395 }
396
397 #[test]
398 fn wrap_return_type_in_result_simple_with_cursor() {
399 check_assist(
400 wrap_return_type_in_result,
401 r#"
402fn foo() -> <|>i32 {
403 let test = "test";
404 return 42i32;
405}
406"#,
407 r#"
408fn foo() -> Result<i32, ${0:_}> {
409 let test = "test";
410 return Ok(42i32);
411}
412"#,
413 );
414 }
415
416 #[test]
417 fn wrap_return_type_in_result_simple_with_tail() {
418 check_assist(
419 wrap_return_type_in_result,
420 r#"
421fn foo() -><|> i32 {
422 let test = "test";
423 42i32
424}
425"#,
426 r#"
427fn foo() -> Result<i32, ${0:_}> {
428 let test = "test";
429 Ok(42i32)
430}
431"#,
432 );
433 }
434
435 #[test]
436 fn wrap_return_type_in_result_simple_with_tail_closure() {
437 check_assist(
438 wrap_return_type_in_result,
439 r#"
440fn foo() {
441 || -><|> i32 {
442 let test = "test";
443 42i32
444 };
445}
446"#,
447 r#"
448fn foo() {
449 || -> Result<i32, ${0:_}> {
450 let test = "test";
451 Ok(42i32)
452 };
453}
454"#,
455 );
456 }
457
458 #[test]
459 fn wrap_return_type_in_result_simple_with_tail_only() {
460 check_assist(
461 wrap_return_type_in_result,
462 r#"fn foo() -> i32<|> { 42i32 }"#,
463 r#"fn foo() -> Result<i32, ${0:_}> { Ok(42i32) }"#,
464 );
465 }
466
467 #[test]
468 fn wrap_return_type_in_result_simple_with_tail_block_like() {
469 check_assist(
470 wrap_return_type_in_result,
471 r#"
472fn foo() -> i32<|> {
473 if true {
474 42i32
475 } else {
476 24i32
477 }
478}
479"#,
480 r#"
481fn foo() -> Result<i32, ${0:_}> {
482 if true {
483 Ok(42i32)
484 } else {
485 Ok(24i32)
486 }
487}
488"#,
489 );
490 }
491
492 #[test]
493 fn wrap_return_type_in_result_simple_without_block_closure() {
494 check_assist(
495 wrap_return_type_in_result,
496 r#"
497fn foo() {
498 || -> i32<|> {
499 if true {
500 42i32
501 } else {
502 24i32
503 }
504 };
505}
506"#,
507 r#"
508fn foo() {
509 || -> Result<i32, ${0:_}> {
510 if true {
511 Ok(42i32)
512 } else {
513 Ok(24i32)
514 }
515 };
516}
517"#,
518 );
519 }
520
521 #[test]
522 fn wrap_return_type_in_result_simple_with_nested_if() {
523 check_assist(
524 wrap_return_type_in_result,
525 r#"
526fn foo() -> i32<|> {
527 if true {
528 if false {
529 1
530 } else {
531 2
532 }
533 } else {
534 24i32
535 }
536}
537"#,
538 r#"
539fn foo() -> Result<i32, ${0:_}> {
540 if true {
541 if false {
542 Ok(1)
543 } else {
544 Ok(2)
545 }
546 } else {
547 Ok(24i32)
548 }
549}
550"#,
551 );
552 }
553
554 #[test]
555 fn wrap_return_type_in_result_simple_with_await() {
556 check_assist(
557 wrap_return_type_in_result,
558 r#"
559async fn foo() -> i<|>32 {
560 if true {
561 if false {
562 1.await
563 } else {
564 2.await
565 }
566 } else {
567 24i32.await
568 }
569}
570"#,
571 r#"
572async fn foo() -> Result<i32, ${0:_}> {
573 if true {
574 if false {
575 Ok(1.await)
576 } else {
577 Ok(2.await)
578 }
579 } else {
580 Ok(24i32.await)
581 }
582}
583"#,
584 );
585 }
586
587 #[test]
588 fn wrap_return_type_in_result_simple_with_array() {
589 check_assist(
590 wrap_return_type_in_result,
591 r#"fn foo() -> [i32;<|> 3] { [1, 2, 3] }"#,
592 r#"fn foo() -> Result<[i32; 3], ${0:_}> { Ok([1, 2, 3]) }"#,
593 );
594 }
595
596 #[test]
597 fn wrap_return_type_in_result_simple_with_cast() {
598 check_assist(
599 wrap_return_type_in_result,
600 r#"
601fn foo() -<|>> i32 {
602 if true {
603 if false {
604 1 as i32
605 } else {
606 2 as i32
607 }
608 } else {
609 24 as i32
610 }
611}
612"#,
613 r#"
614fn foo() -> Result<i32, ${0:_}> {
615 if true {
616 if false {
617 Ok(1 as i32)
618 } else {
619 Ok(2 as i32)
620 }
621 } else {
622 Ok(24 as i32)
623 }
624}
625"#,
626 );
627 }
628
629 #[test]
630 fn wrap_return_type_in_result_simple_with_tail_block_like_match() {
631 check_assist(
632 wrap_return_type_in_result,
633 r#"
634fn foo() -> i32<|> {
635 let my_var = 5;
636 match my_var {
637 5 => 42i32,
638 _ => 24i32,
639 }
640}
641"#,
642 r#"
643fn foo() -> Result<i32, ${0:_}> {
644 let my_var = 5;
645 match my_var {
646 5 => Ok(42i32),
647 _ => Ok(24i32),
648 }
649}
650"#,
651 );
652 }
653
654 #[test]
655 fn wrap_return_type_in_result_simple_with_loop_with_tail() {
656 check_assist(
657 wrap_return_type_in_result,
658 r#"
659fn foo() -> i32<|> {
660 let my_var = 5;
661 loop {
662 println!("test");
663 5
664 }
665 my_var
666}
667"#,
668 r#"
669fn foo() -> Result<i32, ${0:_}> {
670 let my_var = 5;
671 loop {
672 println!("test");
673 5
674 }
675 Ok(my_var)
676}
677"#,
678 );
679 }
680
681 #[test]
682 fn wrap_return_type_in_result_simple_with_loop_in_let_stmt() {
683 check_assist(
684 wrap_return_type_in_result,
685 r#"
686fn foo() -> i32<|> {
687 let my_var = let x = loop {
688 break 1;
689 };
690 my_var
691}
692"#,
693 r#"
694fn foo() -> Result<i32, ${0:_}> {
695 let my_var = let x = loop {
696 break 1;
697 };
698 Ok(my_var)
699}
700"#,
701 );
702 }
703
704 #[test]
705 fn wrap_return_type_in_result_simple_with_tail_block_like_match_return_expr() {
706 check_assist(
707 wrap_return_type_in_result,
708 r#"
709fn foo() -> i32<|> {
710 let my_var = 5;
711 let res = match my_var {
712 5 => 42i32,
713 _ => return 24i32,
714 };
715 res
716}
717"#,
718 r#"
719fn foo() -> Result<i32, ${0:_}> {
720 let my_var = 5;
721 let res = match my_var {
722 5 => 42i32,
723 _ => return Ok(24i32),
724 };
725 Ok(res)
726}
727"#,
728 );
729
730 check_assist(
731 wrap_return_type_in_result,
732 r#"
733fn foo() -> i32<|> {
734 let my_var = 5;
735 let res = if my_var == 5 {
736 42i32
737 } else {
738 return 24i32;
739 };
740 res
741}
742"#,
743 r#"
744fn foo() -> Result<i32, ${0:_}> {
745 let my_var = 5;
746 let res = if my_var == 5 {
747 42i32
748 } else {
749 return Ok(24i32);
750 };
751 Ok(res)
752}
753"#,
754 );
755 }
756
757 #[test]
758 fn wrap_return_type_in_result_simple_with_tail_block_like_match_deeper() {
759 check_assist(
760 wrap_return_type_in_result,
761 r#"
762fn foo() -> i32<|> {
763 let my_var = 5;
764 match my_var {
765 5 => {
766 if true {
767 42i32
768 } else {
769 25i32
770 }
771 },
772 _ => {
773 let test = "test";
774 if test == "test" {
775 return bar();
776 }
777 53i32
778 },
779 }
780}
781"#,
782 r#"
783fn foo() -> Result<i32, ${0:_}> {
784 let my_var = 5;
785 match my_var {
786 5 => {
787 if true {
788 Ok(42i32)
789 } else {
790 Ok(25i32)
791 }
792 },
793 _ => {
794 let test = "test";
795 if test == "test" {
796 return Ok(bar());
797 }
798 Ok(53i32)
799 },
800 }
801}
802"#,
803 );
804 }
805
806 #[test]
807 fn wrap_return_type_in_result_simple_with_tail_block_like_early_return() {
808 check_assist(
809 wrap_return_type_in_result,
810 r#"
811fn foo() -> i<|>32 {
812 let test = "test";
813 if test == "test" {
814 return 24i32;
815 }
816 53i32
817}
818"#,
819 r#"
820fn foo() -> Result<i32, ${0:_}> {
821 let test = "test";
822 if test == "test" {
823 return Ok(24i32);
824 }
825 Ok(53i32)
826}
827"#,
828 );
829 }
830
831 #[test]
832 fn wrap_return_type_in_result_simple_with_closure() {
833 check_assist(
834 wrap_return_type_in_result,
835 r#"
836fn foo(the_field: u32) -><|> u32 {
837 let true_closure = || { return true; };
838 if the_field < 5 {
839 let mut i = 0;
840 if true_closure() {
841 return 99;
842 } else {
843 return 0;
844 }
845 }
846 the_field
847}
848"#,
849 r#"
850fn foo(the_field: u32) -> Result<u32, ${0:_}> {
851 let true_closure = || { return true; };
852 if the_field < 5 {
853 let mut i = 0;
854 if true_closure() {
855 return Ok(99);
856 } else {
857 return Ok(0);
858 }
859 }
860 Ok(the_field)
861}
862"#,
863 );
864
865 check_assist(
866 wrap_return_type_in_result,
867 r#"
868 fn foo(the_field: u32) -> u32<|> {
869 let true_closure = || {
870 return true;
871 };
872 if the_field < 5 {
873 let mut i = 0;
874
875
876 if true_closure() {
877 return 99;
878 } else {
879 return 0;
880 }
881 }
882 let t = None;
883
884 t.unwrap_or_else(|| the_field)
885 }
886 "#,
887 r#"
888 fn foo(the_field: u32) -> Result<u32, ${0:_}> {
889 let true_closure = || {
890 return true;
891 };
892 if the_field < 5 {
893 let mut i = 0;
894
895
896 if true_closure() {
897 return Ok(99);
898 } else {
899 return Ok(0);
900 }
901 }
902 let t = None;
903
904 Ok(t.unwrap_or_else(|| the_field))
905 }
906 "#,
907 );
908 }
909
910 #[test]
911 fn wrap_return_type_in_result_simple_with_weird_forms() {
912 check_assist(
913 wrap_return_type_in_result,
914 r#"
915fn foo() -> i32<|> {
916 let test = "test";
917 if test == "test" {
918 return 24i32;
919 }
920 let mut i = 0;
921 loop {
922 if i == 1 {
923 break 55;
924 }
925 i += 1;
926 }
927}
928"#,
929 r#"
930fn foo() -> Result<i32, ${0:_}> {
931 let test = "test";
932 if test == "test" {
933 return Ok(24i32);
934 }
935 let mut i = 0;
936 loop {
937 if i == 1 {
938 break Ok(55);
939 }
940 i += 1;
941 }
942}
943"#,
944 );
945
946 check_assist(
947 wrap_return_type_in_result,
948 r#"
949fn foo() -> i32<|> {
950 let test = "test";
951 if test == "test" {
952 return 24i32;
953 }
954 let mut i = 0;
955 loop {
956 loop {
957 if i == 1 {
958 break 55;
959 }
960 i += 1;
961 }
962 }
963}
964"#,
965 r#"
966fn foo() -> Result<i32, ${0:_}> {
967 let test = "test";
968 if test == "test" {
969 return Ok(24i32);
970 }
971 let mut i = 0;
972 loop {
973 loop {
974 if i == 1 {
975 break Ok(55);
976 }
977 i += 1;
978 }
979 }
980}
981"#,
982 );
983
984 check_assist(
985 wrap_return_type_in_result,
986 r#"
987fn foo() -> i3<|>2 {
988 let test = "test";
989 let other = 5;
990 if test == "test" {
991 let res = match other {
992 5 => 43,
993 _ => return 56,
994 };
995 }
996 let mut i = 0;
997 loop {
998 loop {
999 if i == 1 {
1000 break 55;
1001 }
1002 i += 1;
1003 }
1004 }
1005}
1006"#,
1007 r#"
1008fn foo() -> Result<i32, ${0:_}> {
1009 let test = "test";
1010 let other = 5;
1011 if test == "test" {
1012 let res = match other {
1013 5 => 43,
1014 _ => return Ok(56),
1015 };
1016 }
1017 let mut i = 0;
1018 loop {
1019 loop {
1020 if i == 1 {
1021 break Ok(55);
1022 }
1023 i += 1;
1024 }
1025 }
1026}
1027"#,
1028 );
1029
1030 check_assist(
1031 wrap_return_type_in_result,
1032 r#"
1033fn foo(the_field: u32) -> u32<|> {
1034 if the_field < 5 {
1035 let mut i = 0;
1036 loop {
1037 if i > 5 {
1038 return 55u32;
1039 }
1040 i += 3;
1041 }
1042 match i {
1043 5 => return 99,
1044 _ => return 0,
1045 };
1046 }
1047 the_field
1048}
1049"#,
1050 r#"
1051fn foo(the_field: u32) -> Result<u32, ${0:_}> {
1052 if the_field < 5 {
1053 let mut i = 0;
1054 loop {
1055 if i > 5 {
1056 return Ok(55u32);
1057 }
1058 i += 3;
1059 }
1060 match i {
1061 5 => return Ok(99),
1062 _ => return Ok(0),
1063 };
1064 }
1065 Ok(the_field)
1066}
1067"#,
1068 );
1069
1070 check_assist(
1071 wrap_return_type_in_result,
1072 r#"
1073fn foo(the_field: u32) -> u3<|>2 {
1074 if the_field < 5 {
1075 let mut i = 0;
1076 match i {
1077 5 => return 99,
1078 _ => return 0,
1079 }
1080 }
1081 the_field
1082}
1083"#,
1084 r#"
1085fn foo(the_field: u32) -> Result<u32, ${0:_}> {
1086 if the_field < 5 {
1087 let mut i = 0;
1088 match i {
1089 5 => return Ok(99),
1090 _ => return Ok(0),
1091 }
1092 }
1093 Ok(the_field)
1094}
1095"#,
1096 );
1097
1098 check_assist(
1099 wrap_return_type_in_result,
1100 r#"
1101fn foo(the_field: u32) -> u32<|> {
1102 if the_field < 5 {
1103 let mut i = 0;
1104 if i == 5 {
1105 return 99
1106 } else {
1107 return 0
1108 }
1109 }
1110 the_field
1111}
1112"#,
1113 r#"
1114fn foo(the_field: u32) -> Result<u32, ${0:_}> {
1115 if the_field < 5 {
1116 let mut i = 0;
1117 if i == 5 {
1118 return Ok(99)
1119 } else {
1120 return Ok(0)
1121 }
1122 }
1123 Ok(the_field)
1124}
1125"#,
1126 );
1127
1128 check_assist(
1129 wrap_return_type_in_result,
1130 r#"
1131fn foo(the_field: u32) -> <|>u32 {
1132 if the_field < 5 {
1133 let mut i = 0;
1134 if i == 5 {
1135 return 99;
1136 } else {
1137 return 0;
1138 }
1139 }
1140 the_field
1141}
1142"#,
1143 r#"
1144fn foo(the_field: u32) -> Result<u32, ${0:_}> {
1145 if the_field < 5 {
1146 let mut i = 0;
1147 if i == 5 {
1148 return Ok(99);
1149 } else {
1150 return Ok(0);
1151 }
1152 }
1153 Ok(the_field)
1154}
1155"#,
1156 );
1157 }
1158}
diff --git a/crates/assists/src/lib.rs b/crates/assists/src/lib.rs
index af88b3437..e8d81b33d 100644
--- a/crates/assists/src/lib.rs
+++ b/crates/assists/src/lib.rs
@@ -120,13 +120,11 @@ mod handlers {
120 120
121 pub(crate) type Handler = fn(&mut Assists, &AssistContext) -> Option<()>; 121 pub(crate) type Handler = fn(&mut Assists, &AssistContext) -> Option<()>;
122 122
123 mod add_custom_impl;
124 mod add_explicit_type; 123 mod add_explicit_type;
125 mod add_missing_impl_members; 124 mod add_missing_impl_members;
126 mod add_turbo_fish; 125 mod add_turbo_fish;
127 mod apply_demorgan; 126 mod apply_demorgan;
128 mod auto_import; 127 mod auto_import;
129 mod change_return_type_to_result;
130 mod change_visibility; 128 mod change_visibility;
131 mod convert_integer_literal; 129 mod convert_integer_literal;
132 mod early_return; 130 mod early_return;
@@ -157,6 +155,7 @@ mod handlers {
157 mod remove_mut; 155 mod remove_mut;
158 mod remove_unused_param; 156 mod remove_unused_param;
159 mod reorder_fields; 157 mod reorder_fields;
158 mod replace_derive_with_manual_impl;
160 mod replace_if_let_with_match; 159 mod replace_if_let_with_match;
161 mod replace_impl_trait_with_generic; 160 mod replace_impl_trait_with_generic;
162 mod replace_let_with_if_let; 161 mod replace_let_with_if_let;
@@ -165,16 +164,15 @@ mod handlers {
165 mod replace_unwrap_with_match; 164 mod replace_unwrap_with_match;
166 mod split_import; 165 mod split_import;
167 mod unwrap_block; 166 mod unwrap_block;
167 mod wrap_return_type_in_result;
168 168
169 pub(crate) fn all() -> &'static [Handler] { 169 pub(crate) fn all() -> &'static [Handler] {
170 &[ 170 &[
171 // These are alphabetic for the foolish consistency 171 // These are alphabetic for the foolish consistency
172 add_custom_impl::add_custom_impl,
173 add_explicit_type::add_explicit_type, 172 add_explicit_type::add_explicit_type,
174 add_turbo_fish::add_turbo_fish, 173 add_turbo_fish::add_turbo_fish,
175 apply_demorgan::apply_demorgan, 174 apply_demorgan::apply_demorgan,
176 auto_import::auto_import, 175 auto_import::auto_import,
177 change_return_type_to_result::change_return_type_to_result,
178 change_visibility::change_visibility, 176 change_visibility::change_visibility,
179 convert_integer_literal::convert_integer_literal, 177 convert_integer_literal::convert_integer_literal,
180 early_return::convert_to_guarded_return, 178 early_return::convert_to_guarded_return,
@@ -208,6 +206,7 @@ mod handlers {
208 remove_mut::remove_mut, 206 remove_mut::remove_mut,
209 remove_unused_param::remove_unused_param, 207 remove_unused_param::remove_unused_param,
210 reorder_fields::reorder_fields, 208 reorder_fields::reorder_fields,
209 replace_derive_with_manual_impl::replace_derive_with_manual_impl,
211 replace_if_let_with_match::replace_if_let_with_match, 210 replace_if_let_with_match::replace_if_let_with_match,
212 replace_impl_trait_with_generic::replace_impl_trait_with_generic, 211 replace_impl_trait_with_generic::replace_impl_trait_with_generic,
213 replace_let_with_if_let::replace_let_with_if_let, 212 replace_let_with_if_let::replace_let_with_if_let,
@@ -215,6 +214,7 @@ mod handlers {
215 replace_unwrap_with_match::replace_unwrap_with_match, 214 replace_unwrap_with_match::replace_unwrap_with_match,
216 split_import::split_import, 215 split_import::split_import,
217 unwrap_block::unwrap_block, 216 unwrap_block::unwrap_block,
217 wrap_return_type_in_result::wrap_return_type_in_result,
218 // These are manually sorted for better priorities 218 // These are manually sorted for better priorities
219 add_missing_impl_members::add_missing_impl_members, 219 add_missing_impl_members::add_missing_impl_members,
220 add_missing_impl_members::add_missing_default_members, 220 add_missing_impl_members::add_missing_default_members,
diff --git a/crates/assists/src/tests/generated.rs b/crates/assists/src/tests/generated.rs
index 168e1626a..dbf4f21aa 100644
--- a/crates/assists/src/tests/generated.rs
+++ b/crates/assists/src/tests/generated.rs
@@ -3,25 +3,6 @@
3use super::check_doc_test; 3use super::check_doc_test;
4 4
5#[test] 5#[test]
6fn doctest_add_custom_impl() {
7 check_doc_test(
8 "add_custom_impl",
9 r#####"
10#[derive(Deb<|>ug, Display)]
11struct S;
12"#####,
13 r#####"
14#[derive(Display)]
15struct S;
16
17impl Debug for S {
18 $0
19}
20"#####,
21 )
22}
23
24#[test]
25fn doctest_add_explicit_type() { 6fn doctest_add_explicit_type() {
26 check_doc_test( 7 check_doc_test(
27 "add_explicit_type", 8 "add_explicit_type",
@@ -178,19 +159,6 @@ pub mod std { pub mod collections { pub struct HashMap { } } }
178} 159}
179 160
180#[test] 161#[test]
181fn doctest_change_return_type_to_result() {
182 check_doc_test(
183 "change_return_type_to_result",
184 r#####"
185fn foo() -> i32<|> { 42i32 }
186"#####,
187 r#####"
188fn foo() -> Result<i32, ${0:_}> { Ok(42i32) }
189"#####,
190 )
191}
192
193#[test]
194fn doctest_change_visibility() { 162fn doctest_change_visibility() {
195 check_doc_test( 163 check_doc_test(
196 "change_visibility", 164 "change_visibility",
@@ -832,6 +800,29 @@ const test: Foo = Foo {foo: 1, bar: 0}
832} 800}
833 801
834#[test] 802#[test]
803fn doctest_replace_derive_with_manual_impl() {
804 check_doc_test(
805 "replace_derive_with_manual_impl",
806 r#####"
807trait Debug { fn fmt(&self, f: &mut Formatter) -> Result<()>; }
808#[derive(Deb<|>ug, Display)]
809struct S;
810"#####,
811 r#####"
812trait Debug { fn fmt(&self, f: &mut Formatter) -> Result<()>; }
813#[derive(Display)]
814struct S;
815
816impl Debug for S {
817 fn fmt(&self, f: &mut Formatter) -> Result<()> {
818 ${0:todo!()}
819 }
820}
821"#####,
822 )
823}
824
825#[test]
835fn doctest_replace_if_let_with_match() { 826fn doctest_replace_if_let_with_match() {
836 check_doc_test( 827 check_doc_test(
837 "replace_if_let_with_match", 828 "replace_if_let_with_match",
@@ -985,3 +976,16 @@ fn foo() {
985"#####, 976"#####,
986 ) 977 )
987} 978}
979
980#[test]
981fn doctest_wrap_return_type_in_result() {
982 check_doc_test(
983 "wrap_return_type_in_result",
984 r#####"
985fn foo() -> i32<|> { 42i32 }
986"#####,
987 r#####"
988fn foo() -> Result<i32, ${0:_}> { Ok(42i32) }
989"#####,
990 )
991}
diff --git a/xtask/tests/tidy.rs b/xtask/tests/tidy.rs
index 4c7db8405..99652e76b 100644
--- a/xtask/tests/tidy.rs
+++ b/xtask/tests/tidy.rs
@@ -214,9 +214,6 @@ fn check_todo(path: &Path, text: &str) {
214 // This file itself obviously needs to use todo (<- like this!). 214 // This file itself obviously needs to use todo (<- like this!).
215 "tests/cli.rs", 215 "tests/cli.rs",
216 // Some of our assists generate `todo!()`. 216 // Some of our assists generate `todo!()`.
217 "tests/generated.rs",
218 "handlers/add_custom_impl.rs",
219 "handlers/add_missing_impl_members.rs",
220 "handlers/add_turbo_fish.rs", 217 "handlers/add_turbo_fish.rs",
221 "handlers/generate_function.rs", 218 "handlers/generate_function.rs",
222 // To support generating `todo!()` in assists, we have `expr_todo()` in 219 // To support generating `todo!()` in assists, we have `expr_todo()` in
@@ -229,6 +226,11 @@ fn check_todo(path: &Path, text: &str) {
229 return; 226 return;
230 } 227 }
231 if text.contains("TODO") || text.contains("TOOD") || text.contains("todo!") { 228 if text.contains("TODO") || text.contains("TOOD") || text.contains("todo!") {
229 // Generated by an assist
230 if text.contains("${0:todo!()}") {
231 return;
232 }
233
232 panic!( 234 panic!(
233 "\nTODO markers or todo! macros should not be committed to the master branch,\n\ 235 "\nTODO markers or todo! macros should not be committed to the master branch,\n\
234 use FIXME instead\n\ 236 use FIXME instead\n\
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 22:58:18 +0000