1use anyhow::Result;
2use collections::{HashMap, HashSet};
3use editor::{
4 context_header_renderer, diagnostic_block_renderer, diagnostic_header_renderer,
5 display_map::{BlockDisposition, BlockId, BlockProperties},
6 BuildSettings, Editor, ExcerptId, ExcerptProperties, MultiBuffer,
7};
8use gpui::{
9 action, elements::*, keymap::Binding, AppContext, Entity, ModelHandle, MutableAppContext,
10 RenderContext, Task, View, ViewContext, ViewHandle,
11};
12use language::{Bias, Buffer, Diagnostic, DiagnosticEntry, Point};
13use postage::watch;
14use project::{Project, ProjectPath, WorktreeId};
15use std::{cmp::Ordering, ops::Range, path::Path, sync::Arc};
16use util::TryFutureExt;
17use workspace::Workspace;
18
19action!(Toggle);
20
21const CONTEXT_LINE_COUNT: u32 = 1;
22
23pub fn init(cx: &mut MutableAppContext) {
24 cx.add_bindings([Binding::new("alt-shift-D", Toggle, None)]);
25 cx.add_action(ProjectDiagnosticsEditor::toggle);
26}
27
28type Event = editor::Event;
29
30struct ProjectDiagnostics {
31 project: ModelHandle<Project>,
32}
33
34struct ProjectDiagnosticsEditor {
35 project: ModelHandle<Project>,
36 editor: ViewHandle<Editor>,
37 excerpts: ModelHandle<MultiBuffer>,
38 path_states: Vec<(Arc<Path>, Vec<DiagnosticGroupState>)>,
39 paths_to_update: HashMap<WorktreeId, HashSet<ProjectPath>>,
40 build_settings: BuildSettings,
41 settings: watch::Receiver<workspace::Settings>,
42}
43
44struct DiagnosticGroupState {
45 primary_diagnostic: DiagnosticEntry<language::Anchor>,
46 excerpts: Vec<ExcerptId>,
47 blocks: HashMap<BlockId, DiagnosticBlock>,
48 block_count: usize,
49}
50
51enum DiagnosticBlock {
52 Header(Diagnostic),
53 Inline(Diagnostic),
54 Context,
55}
56
57impl ProjectDiagnostics {
58 fn new(project: ModelHandle<Project>) -> Self {
59 Self { project }
60 }
61}
62
63impl Entity for ProjectDiagnostics {
64 type Event = ();
65}
66
67impl Entity for ProjectDiagnosticsEditor {
68 type Event = Event;
69}
70
71impl View for ProjectDiagnosticsEditor {
72 fn ui_name() -> &'static str {
73 "ProjectDiagnosticsEditor"
74 }
75
76 fn render(&mut self, _: &mut RenderContext<Self>) -> ElementBox {
77 if self.path_states.is_empty() {
78 let theme = &self.settings.borrow().theme.project_diagnostics;
79 Label::new(
80 "No problems detected in the project".to_string(),
81 theme.empty_message.clone(),
82 )
83 .aligned()
84 .contained()
85 .with_style(theme.container)
86 .boxed()
87 } else {
88 ChildView::new(self.editor.id()).boxed()
89 }
90 }
91
92 fn on_focus(&mut self, cx: &mut ViewContext<Self>) {
93 if !self.path_states.is_empty() {
94 cx.focus(&self.editor);
95 }
96 }
97}
98
99impl ProjectDiagnosticsEditor {
100 fn new(
101 project: ModelHandle<Project>,
102 settings: watch::Receiver<workspace::Settings>,
103 cx: &mut ViewContext<Self>,
104 ) -> Self {
105 cx.subscribe(&project, |this, _, event, cx| match event {
106 project::Event::DiskBasedDiagnosticsUpdated { worktree_id } => {
107 if let Some(paths) = this.paths_to_update.remove(&worktree_id) {
108 this.update_excerpts(paths, cx);
109 }
110 }
111 project::Event::DiagnosticsUpdated(path) => {
112 this.paths_to_update
113 .entry(path.worktree_id)
114 .or_default()
115 .insert(path.clone());
116 }
117 _ => {}
118 })
119 .detach();
120
121 let excerpts = cx.add_model(|cx| MultiBuffer::new(project.read(cx).replica_id()));
122 let build_settings = editor::settings_builder(excerpts.downgrade(), settings.clone());
123 let editor =
124 cx.add_view(|cx| Editor::for_buffer(excerpts.clone(), build_settings.clone(), cx));
125 cx.subscribe(&editor, |_, _, event, cx| cx.emit(*event))
126 .detach();
127
128 let paths_to_update = project
129 .read(cx)
130 .diagnostic_summaries(cx)
131 .map(|e| e.0)
132 .collect();
133 let this = Self {
134 project,
135 excerpts,
136 editor,
137 build_settings,
138 settings,
139 path_states: Default::default(),
140 paths_to_update: Default::default(),
141 };
142 this.update_excerpts(paths_to_update, cx);
143 this
144 }
145
146 #[cfg(test)]
147 fn text(&self, cx: &AppContext) -> String {
148 self.editor.read(cx).text(cx)
149 }
150
151 fn toggle(workspace: &mut Workspace, _: &Toggle, cx: &mut ViewContext<Workspace>) {
152 let diagnostics = cx.add_model(|_| ProjectDiagnostics::new(workspace.project().clone()));
153 workspace.add_item(diagnostics, cx);
154 }
155
156 fn update_excerpts(&self, paths: HashSet<ProjectPath>, cx: &mut ViewContext<Self>) {
157 let project = self.project.clone();
158 cx.spawn(|this, mut cx| {
159 async move {
160 for path in paths {
161 let buffer = project
162 .update(&mut cx, |project, cx| project.open_buffer(path, cx))
163 .await?;
164 this.update(&mut cx, |view, cx| view.populate_excerpts(buffer, cx))
165 }
166 Result::<_, anyhow::Error>::Ok(())
167 }
168 .log_err()
169 })
170 .detach();
171 }
172
173 fn populate_excerpts(&mut self, buffer: ModelHandle<Buffer>, cx: &mut ViewContext<Self>) {
174 let snapshot;
175 let path;
176 {
177 let buffer = buffer.read(cx);
178 snapshot = buffer.snapshot();
179 if let Some(file) = buffer.file() {
180 path = file.path().clone();
181 } else {
182 return;
183 }
184 }
185
186 let path_ix = match self
187 .path_states
188 .binary_search_by_key(&path.as_ref(), |e| e.0.as_ref())
189 {
190 Ok(ix) => ix,
191 Err(ix) => {
192 self.path_states
193 .insert(ix, (path.clone(), Default::default()));
194 ix
195 }
196 };
197
198 let mut prev_excerpt_id = if path_ix > 0 {
199 let prev_path_last_group = &self.path_states[path_ix - 1].1.last().unwrap();
200 prev_path_last_group.excerpts.last().unwrap().clone()
201 } else {
202 ExcerptId::min()
203 };
204
205 let groups = &mut self.path_states[path_ix].1;
206 let mut groups_to_add = Vec::new();
207 let mut group_ixs_to_remove = Vec::new();
208 let mut blocks_to_add = Vec::new();
209 let mut blocks_to_remove = HashSet::default();
210 let mut diagnostic_blocks = Vec::new();
211 let excerpts_snapshot = self.excerpts.update(cx, |excerpts, excerpts_cx| {
212 let mut old_groups = groups.iter().enumerate().peekable();
213 let mut new_groups = snapshot
214 .diagnostic_groups()
215 .into_iter()
216 .filter(|group| group.entries[group.primary_ix].diagnostic.is_disk_based)
217 .peekable();
218
219 loop {
220 let mut to_insert = None;
221 let mut to_invalidate = None;
222 match (old_groups.peek(), new_groups.peek()) {
223 (None, None) => break,
224 (None, Some(_)) => to_insert = new_groups.next(),
225 (Some(_), None) => to_invalidate = old_groups.next(),
226 (Some((_, old_group)), Some(new_group)) => {
227 let old_primary = &old_group.primary_diagnostic;
228 let new_primary = &new_group.entries[new_group.primary_ix];
229 match compare_diagnostics(old_primary, new_primary, &snapshot) {
230 Ordering::Less => to_invalidate = old_groups.next(),
231 Ordering::Equal => {
232 old_groups.next();
233 new_groups.next();
234 }
235 Ordering::Greater => to_insert = new_groups.next(),
236 }
237 }
238 }
239
240 if let Some(group) = to_insert {
241 let mut group_state = DiagnosticGroupState {
242 primary_diagnostic: group.entries[group.primary_ix].clone(),
243 excerpts: Default::default(),
244 blocks: Default::default(),
245 block_count: 0,
246 };
247 let mut pending_range: Option<(Range<Point>, usize)> = None;
248 let mut is_first_excerpt_for_group = true;
249 for (ix, entry) in group.entries.iter().map(Some).chain([None]).enumerate() {
250 let resolved_entry = entry.map(|e| e.resolve::<Point>(&snapshot));
251 if let Some((range, start_ix)) = &mut pending_range {
252 if let Some(entry) = resolved_entry.as_ref() {
253 if entry.range.start.row
254 <= range.end.row + 1 + CONTEXT_LINE_COUNT * 2
255 {
256 range.end = range.end.max(entry.range.end);
257 continue;
258 }
259 }
260
261 let excerpt_start =
262 Point::new(range.start.row.saturating_sub(CONTEXT_LINE_COUNT), 0);
263 let excerpt_end = snapshot.clip_point(
264 Point::new(range.end.row + CONTEXT_LINE_COUNT, u32::MAX),
265 Bias::Left,
266 );
267 let excerpt_id = excerpts.insert_excerpt_after(
268 &prev_excerpt_id,
269 ExcerptProperties {
270 buffer: &buffer,
271 range: excerpt_start..excerpt_end,
272 },
273 excerpts_cx,
274 );
275
276 prev_excerpt_id = excerpt_id.clone();
277 group_state.excerpts.push(excerpt_id.clone());
278 let header_position = (excerpt_id.clone(), language::Anchor::min());
279
280 if is_first_excerpt_for_group {
281 is_first_excerpt_for_group = false;
282 let primary = &group.entries[group.primary_ix].diagnostic;
283 group_state.block_count += 1;
284 diagnostic_blocks.push(DiagnosticBlock::Header(primary.clone()));
285 blocks_to_add.push(BlockProperties {
286 position: header_position,
287 height: 2,
288 render: diagnostic_header_renderer(
289 buffer.clone(),
290 primary.clone(),
291 true,
292 self.build_settings.clone(),
293 ),
294 disposition: BlockDisposition::Above,
295 });
296 } else {
297 group_state.block_count += 1;
298 diagnostic_blocks.push(DiagnosticBlock::Context);
299 blocks_to_add.push(BlockProperties {
300 position: header_position,
301 height: 1,
302 render: context_header_renderer(self.build_settings.clone()),
303 disposition: BlockDisposition::Above,
304 });
305 }
306
307 for entry in &group.entries[*start_ix..ix] {
308 if !entry.diagnostic.is_primary {
309 group_state.block_count += 1;
310 diagnostic_blocks
311 .push(DiagnosticBlock::Inline(entry.diagnostic.clone()));
312 blocks_to_add.push(BlockProperties {
313 position: (excerpt_id.clone(), entry.range.start.clone()),
314 height: entry.diagnostic.message.matches('\n').count()
315 as u8
316 + 1,
317 render: diagnostic_block_renderer(
318 entry.diagnostic.clone(),
319 true,
320 self.build_settings.clone(),
321 ),
322 disposition: BlockDisposition::Below,
323 });
324 }
325 }
326
327 pending_range.take();
328 }
329
330 if let Some(entry) = resolved_entry {
331 pending_range = Some((entry.range.clone(), ix));
332 }
333 }
334
335 groups_to_add.push(group_state);
336 } else if let Some((group_ix, group_state)) = to_invalidate {
337 excerpts.remove_excerpts(group_state.excerpts.iter(), excerpts_cx);
338 group_ixs_to_remove.push(group_ix);
339 blocks_to_remove.extend(group_state.blocks.keys().copied());
340 }
341 }
342
343 excerpts.snapshot(excerpts_cx)
344 });
345
346 self.editor.update(cx, |editor, cx| {
347 editor.remove_blocks(blocks_to_remove, cx);
348 let mut block_ids = editor
349 .insert_blocks(
350 blocks_to_add.into_iter().map(|block| {
351 let (excerpt_id, text_anchor) = block.position;
352 BlockProperties {
353 position: excerpts_snapshot.anchor_in_excerpt(excerpt_id, text_anchor),
354 height: block.height,
355 render: block.render,
356 disposition: block.disposition,
357 }
358 }),
359 cx,
360 )
361 .into_iter()
362 .zip(diagnostic_blocks);
363
364 for group_state in &mut groups_to_add {
365 group_state.blocks = block_ids.by_ref().take(group_state.block_count).collect();
366 }
367 });
368
369 for ix in group_ixs_to_remove.into_iter().rev() {
370 groups.remove(ix);
371 }
372 groups.extend(groups_to_add);
373 groups.sort_unstable_by(|a, b| {
374 let range_a = &a.primary_diagnostic.range;
375 let range_b = &b.primary_diagnostic.range;
376 range_a
377 .start
378 .cmp(&range_b.start, &snapshot)
379 .unwrap()
380 .then_with(|| range_a.end.cmp(&range_b.end, &snapshot).unwrap())
381 });
382
383 if groups.is_empty() {
384 self.path_states.remove(path_ix);
385 }
386
387 if self.editor.is_focused(cx) && self.path_states.is_empty() {
388 cx.focus_self();
389 }
390 cx.notify();
391 }
392}
393
394impl workspace::Item for ProjectDiagnostics {
395 type View = ProjectDiagnosticsEditor;
396
397 fn build_view(
398 handle: ModelHandle<Self>,
399 settings: watch::Receiver<workspace::Settings>,
400 cx: &mut ViewContext<Self::View>,
401 ) -> Self::View {
402 let project = handle.read(cx).project.clone();
403 ProjectDiagnosticsEditor::new(project, settings, cx)
404 }
405
406 fn project_path(&self) -> Option<project::ProjectPath> {
407 None
408 }
409}
410
411impl workspace::ItemView for ProjectDiagnosticsEditor {
412 fn title(&self, _: &AppContext) -> String {
413 "Project Diagnostics".to_string()
414 }
415
416 fn project_path(&self, _: &AppContext) -> Option<project::ProjectPath> {
417 None
418 }
419
420 fn save(&mut self, cx: &mut ViewContext<Self>) -> Result<Task<Result<()>>> {
421 self.excerpts.update(cx, |excerpts, cx| excerpts.save(cx))
422 }
423
424 fn save_as(
425 &mut self,
426 _: ModelHandle<project::Worktree>,
427 _: &std::path::Path,
428 _: &mut ViewContext<Self>,
429 ) -> Task<Result<()>> {
430 unreachable!()
431 }
432
433 fn is_dirty(&self, cx: &AppContext) -> bool {
434 self.excerpts.read(cx).read(cx).is_dirty()
435 }
436
437 fn has_conflict(&self, cx: &AppContext) -> bool {
438 self.excerpts.read(cx).read(cx).has_conflict()
439 }
440
441 fn should_update_tab_on_event(event: &Event) -> bool {
442 matches!(
443 event,
444 Event::Saved | Event::Dirtied | Event::FileHandleChanged
445 )
446 }
447
448 fn can_save(&self, _: &AppContext) -> bool {
449 true
450 }
451
452 fn can_save_as(&self, _: &AppContext) -> bool {
453 false
454 }
455}
456
457fn compare_diagnostics<L: language::ToOffset, R: language::ToOffset>(
458 lhs: &DiagnosticEntry<L>,
459 rhs: &DiagnosticEntry<R>,
460 snapshot: &language::BufferSnapshot,
461) -> Ordering {
462 lhs.range
463 .start
464 .to_offset(&snapshot)
465 .cmp(&rhs.range.start.to_offset(snapshot))
466 .then_with(|| {
467 lhs.range
468 .end
469 .to_offset(&snapshot)
470 .cmp(&rhs.range.end.to_offset(snapshot))
471 })
472 .then_with(|| lhs.diagnostic.message.cmp(&rhs.diagnostic.message))
473}
474
475#[cfg(test)]
476mod tests {
477 use super::*;
478 use client::{http::ServerResponse, test::FakeHttpClient, Client, UserStore};
479 use gpui::TestAppContext;
480 use language::{Diagnostic, DiagnosticEntry, DiagnosticSeverity, LanguageRegistry, PointUtf16};
481 use project::{worktree, FakeFs};
482 use serde_json::json;
483 use std::sync::Arc;
484 use unindent::Unindent as _;
485 use workspace::WorkspaceParams;
486
487 #[gpui::test]
488 async fn test_diagnostics(mut cx: TestAppContext) {
489 let settings = cx.update(WorkspaceParams::test).settings;
490 let http_client = FakeHttpClient::new(|_| async move { Ok(ServerResponse::new(404)) });
491 let client = Client::new(http_client.clone());
492 let user_store = cx.add_model(|cx| UserStore::new(client.clone(), http_client, cx));
493 let fs = Arc::new(FakeFs::new());
494
495 let project = cx.update(|cx| {
496 Project::local(
497 client.clone(),
498 user_store,
499 Arc::new(LanguageRegistry::new()),
500 fs.clone(),
501 cx,
502 )
503 });
504
505 fs.insert_tree(
506 "/test",
507 json!({
508 "a.rs": "
509 const a: i32 = 'a';
510 ".unindent(),
511
512 "main.rs": "
513 fn main() {
514 let x = vec![];
515 let y = vec![];
516 a(x);
517 b(y);
518 // comment 1
519 // comment 2
520 c(y);
521 d(x);
522 }
523 "
524 .unindent(),
525 }),
526 )
527 .await;
528
529 let worktree = project
530 .update(&mut cx, |project, cx| {
531 project.add_local_worktree("/test", cx)
532 })
533 .await
534 .unwrap();
535
536 worktree.update(&mut cx, |worktree, cx| {
537 worktree
538 .update_diagnostic_entries(
539 Arc::from("/test/main.rs".as_ref()),
540 None,
541 vec![
542 DiagnosticEntry {
543 range: PointUtf16::new(1, 8)..PointUtf16::new(1, 9),
544 diagnostic: Diagnostic {
545 message:
546 "move occurs because `x` has type `Vec<char>`, which does not implement the `Copy` trait"
547 .to_string(),
548 severity: DiagnosticSeverity::INFORMATION,
549 is_primary: false,
550 is_disk_based: true,
551 group_id: 1,
552 ..Default::default()
553 },
554 },
555 DiagnosticEntry {
556 range: PointUtf16::new(2, 8)..PointUtf16::new(2, 9),
557 diagnostic: Diagnostic {
558 message:
559 "move occurs because `y` has type `Vec<char>`, which does not implement the `Copy` trait"
560 .to_string(),
561 severity: DiagnosticSeverity::INFORMATION,
562 is_primary: false,
563 is_disk_based: true,
564 group_id: 0,
565 ..Default::default()
566 },
567 },
568 DiagnosticEntry {
569 range: PointUtf16::new(3, 6)..PointUtf16::new(3, 7),
570 diagnostic: Diagnostic {
571 message: "value moved here".to_string(),
572 severity: DiagnosticSeverity::INFORMATION,
573 is_primary: false,
574 is_disk_based: true,
575 group_id: 1,
576 ..Default::default()
577 },
578 },
579 DiagnosticEntry {
580 range: PointUtf16::new(4, 6)..PointUtf16::new(4, 7),
581 diagnostic: Diagnostic {
582 message: "value moved here".to_string(),
583 severity: DiagnosticSeverity::INFORMATION,
584 is_primary: false,
585 is_disk_based: true,
586 group_id: 0,
587 ..Default::default()
588 },
589 },
590 DiagnosticEntry {
591 range: PointUtf16::new(7, 6)..PointUtf16::new(7, 7),
592 diagnostic: Diagnostic {
593 message: "use of moved value".to_string(),
594 severity: DiagnosticSeverity::ERROR,
595 is_primary: true,
596 is_disk_based: true,
597 group_id: 0,
598 ..Default::default()
599 },
600 },
601 DiagnosticEntry {
602 range: PointUtf16::new(7, 6)..PointUtf16::new(7, 7),
603 diagnostic: Diagnostic {
604 message: "value used here after move".to_string(),
605 severity: DiagnosticSeverity::INFORMATION,
606 is_primary: false,
607 is_disk_based: true,
608 group_id: 0,
609 ..Default::default()
610 },
611 },
612 DiagnosticEntry {
613 range: PointUtf16::new(8, 6)..PointUtf16::new(8, 7),
614 diagnostic: Diagnostic {
615 message: "use of moved value".to_string(),
616 severity: DiagnosticSeverity::ERROR,
617 is_primary: true,
618 is_disk_based: true,
619 group_id: 1,
620 ..Default::default()
621 },
622 },
623 DiagnosticEntry {
624 range: PointUtf16::new(8, 6)..PointUtf16::new(8, 7),
625 diagnostic: Diagnostic {
626 message: "value used here after move".to_string(),
627 severity: DiagnosticSeverity::INFORMATION,
628 is_primary: false,
629 is_disk_based: true,
630 group_id: 1,
631 ..Default::default()
632 },
633 },
634 ],
635 cx,
636 )
637 .unwrap();
638 });
639
640 let view = cx.add_view(Default::default(), |cx| {
641 ProjectDiagnosticsEditor::new(project.clone(), settings, cx)
642 });
643
644 view.condition(&mut cx, |view, cx| view.text(cx).contains("fn main()"))
645 .await;
646
647 view.update(&mut cx, |view, cx| {
648 let editor = view.editor.update(cx, |editor, cx| editor.snapshot(cx));
649
650 assert_eq!(
651 editor.text(),
652 concat!(
653 //
654 // main.rs, diagnostic group 1
655 //
656 "\n", // primary message
657 "\n", // filename
658 " let x = vec![];\n",
659 " let y = vec![];\n",
660 "\n", // supporting diagnostic
661 " a(x);\n",
662 " b(y);\n",
663 "\n", // supporting diagnostic
664 " // comment 1\n",
665 " // comment 2\n",
666 " c(y);\n",
667 "\n", // supporting diagnostic
668 " d(x);\n",
669 //
670 // main.rs, diagnostic group 2
671 //
672 "\n", // primary message
673 "\n", // filename
674 "fn main() {\n",
675 " let x = vec![];\n",
676 "\n", // supporting diagnostic
677 " let y = vec![];\n",
678 " a(x);\n",
679 "\n", // supporting diagnostic
680 " b(y);\n",
681 "\n", // context ellipsis
682 " c(y);\n",
683 " d(x);\n",
684 "\n", // supporting diagnostic
685 "}"
686 )
687 );
688 });
689
690 worktree.update(&mut cx, |worktree, cx| {
691 worktree
692 .update_diagnostic_entries(
693 Arc::from("/test/a.rs".as_ref()),
694 None,
695 vec![
696 DiagnosticEntry {
697 range: PointUtf16::new(0, 15)..PointUtf16::new(0, 15),
698 diagnostic: Diagnostic {
699 message: "mismatched types".to_string(),
700 severity: DiagnosticSeverity::ERROR,
701 is_primary: true,
702 is_disk_based: true,
703 group_id: 0,
704 ..Default::default()
705 },
706 },
707 DiagnosticEntry {
708 range: PointUtf16::new(0, 15)..PointUtf16::new(0, 15),
709 diagnostic: Diagnostic {
710 message: "expected `usize`, found `char`".to_string(),
711 severity: DiagnosticSeverity::INFORMATION,
712 is_primary: false,
713 is_disk_based: true,
714 group_id: 0,
715 ..Default::default()
716 },
717 },
718 ],
719 cx,
720 )
721 .unwrap();
722 cx.emit(worktree::Event::DiskBasedDiagnosticsUpdated);
723 });
724
725 view.condition(&mut cx, |view, cx| view.text(cx).contains("const a"))
726 .await;
727
728 view.update(&mut cx, |view, cx| {
729 let editor = view.editor.update(cx, |editor, cx| editor.snapshot(cx));
730
731 assert_eq!(
732 editor.text(),
733 concat!(
734 //
735 // a.rs
736 //
737 "\n", // primary message
738 "\n", // filename
739 "const a: i32 = 'a';\n",
740 "\n", // supporting diagnostic
741 "\n", // context line
742 //
743 // main.rs, diagnostic group 1
744 //
745 "\n", // primary message
746 "\n", // filename
747 " let x = vec![];\n",
748 " let y = vec![];\n",
749 "\n", // supporting diagnostic
750 " a(x);\n",
751 " b(y);\n",
752 "\n", // supporting diagnostic
753 " // comment 1\n",
754 " // comment 2\n",
755 " c(y);\n",
756 "\n", // supporting diagnostic
757 " d(x);\n",
758 //
759 // main.rs, diagnostic group 2
760 //
761 "\n", // primary message
762 "\n", // filename
763 "fn main() {\n",
764 " let x = vec![];\n",
765 "\n", // supporting diagnostic
766 " let y = vec![];\n",
767 " a(x);\n",
768 "\n", // supporting diagnostic
769 " b(y);\n",
770 "\n", // context ellipsis
771 " c(y);\n",
772 " d(x);\n",
773 "\n", // supporting diagnostic
774 "}"
775 )
776 );
777 });
778 }
779}