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-rw-r--r--crates/ide/src/lib.rs128
1 files changed, 70 insertions, 58 deletions
diff --git a/crates/ide/src/lib.rs b/crates/ide/src/lib.rs
index ff2a54117..97c9e5d2b 100644
--- a/crates/ide/src/lib.rs
+++ b/crates/ide/src/lib.rs
@@ -58,7 +58,7 @@ use cfg::CfgOptions;
58 58
59use ide_db::base_db::{ 59use ide_db::base_db::{
60 salsa::{self, ParallelDatabase}, 60 salsa::{self, ParallelDatabase},
61 CheckCanceled, Env, FileLoader, FileSet, SourceDatabase, VfsPath, 61 Env, FileLoader, FileSet, SourceDatabase, VfsPath,
62}; 62};
63use ide_db::{ 63use ide_db::{
64 symbol_index::{self, FileSymbol}, 64 symbol_index::{self, FileSymbol},
@@ -98,7 +98,7 @@ pub use ide_completion::{
98}; 98};
99pub use ide_db::{ 99pub use ide_db::{
100 base_db::{ 100 base_db::{
101 Canceled, Change, CrateGraph, CrateId, Edition, FileId, FilePosition, FileRange, 101 Cancelled, Change, CrateGraph, CrateId, Edition, FileId, FilePosition, FileRange,
102 SourceRoot, SourceRootId, 102 SourceRoot, SourceRootId,
103 }, 103 },
104 call_info::CallInfo, 104 call_info::CallInfo,
@@ -113,7 +113,7 @@ pub use ide_ssr::SsrError;
113pub use syntax::{TextRange, TextSize}; 113pub use syntax::{TextRange, TextSize};
114pub use text_edit::{Indel, TextEdit}; 114pub use text_edit::{Indel, TextEdit};
115 115
116pub type Cancelable<T> = Result<T, Canceled>; 116pub type Cancellable<T> = Result<T, Cancelled>;
117 117
118/// Info associated with a text range. 118/// Info associated with a text range.
119#[derive(Debug)] 119#[derive(Debug)]
@@ -227,11 +227,11 @@ impl Analysis {
227 } 227 }
228 228
229 /// Debug info about the current state of the analysis. 229 /// Debug info about the current state of the analysis.
230 pub fn status(&self, file_id: Option<FileId>) -> Cancelable<String> { 230 pub fn status(&self, file_id: Option<FileId>) -> Cancellable<String> {
231 self.with_db(|db| status::status(&*db, file_id)) 231 self.with_db(|db| status::status(&*db, file_id))
232 } 232 }
233 233
234 pub fn prime_caches<F>(&self, cb: F) -> Cancelable<()> 234 pub fn prime_caches<F>(&self, cb: F) -> Cancellable<()>
235 where 235 where
236 F: Fn(PrimeCachesProgress) + Sync + std::panic::UnwindSafe, 236 F: Fn(PrimeCachesProgress) + Sync + std::panic::UnwindSafe,
237 { 237 {
@@ -239,35 +239,35 @@ impl Analysis {
239 } 239 }
240 240
241 /// Gets the text of the source file. 241 /// Gets the text of the source file.
242 pub fn file_text(&self, file_id: FileId) -> Cancelable<Arc<String>> { 242 pub fn file_text(&self, file_id: FileId) -> Cancellable<Arc<String>> {
243 self.with_db(|db| db.file_text(file_id)) 243 self.with_db(|db| db.file_text(file_id))
244 } 244 }
245 245
246 /// Gets the syntax tree of the file. 246 /// Gets the syntax tree of the file.
247 pub fn parse(&self, file_id: FileId) -> Cancelable<SourceFile> { 247 pub fn parse(&self, file_id: FileId) -> Cancellable<SourceFile> {
248 self.with_db(|db| db.parse(file_id).tree()) 248 self.with_db(|db| db.parse(file_id).tree())
249 } 249 }
250 250
251 /// Returns true if this file belongs to an immutable library. 251 /// Returns true if this file belongs to an immutable library.
252 pub fn is_library_file(&self, file_id: FileId) -> Cancelable<bool> { 252 pub fn is_library_file(&self, file_id: FileId) -> Cancellable<bool> {
253 use ide_db::base_db::SourceDatabaseExt; 253 use ide_db::base_db::SourceDatabaseExt;
254 self.with_db(|db| db.source_root(db.file_source_root(file_id)).is_library) 254 self.with_db(|db| db.source_root(db.file_source_root(file_id)).is_library)
255 } 255 }
256 256
257 /// Gets the file's `LineIndex`: data structure to convert between absolute 257 /// Gets the file's `LineIndex`: data structure to convert between absolute
258 /// offsets and line/column representation. 258 /// offsets and line/column representation.
259 pub fn file_line_index(&self, file_id: FileId) -> Cancelable<Arc<LineIndex>> { 259 pub fn file_line_index(&self, file_id: FileId) -> Cancellable<Arc<LineIndex>> {
260 self.with_db(|db| db.line_index(file_id)) 260 self.with_db(|db| db.line_index(file_id))
261 } 261 }
262 262
263 /// Selects the next syntactic nodes encompassing the range. 263 /// Selects the next syntactic nodes encompassing the range.
264 pub fn extend_selection(&self, frange: FileRange) -> Cancelable<TextRange> { 264 pub fn extend_selection(&self, frange: FileRange) -> Cancellable<TextRange> {
265 self.with_db(|db| extend_selection::extend_selection(db, frange)) 265 self.with_db(|db| extend_selection::extend_selection(db, frange))
266 } 266 }
267 267
268 /// Returns position of the matching brace (all types of braces are 268 /// Returns position of the matching brace (all types of braces are
269 /// supported). 269 /// supported).
270 pub fn matching_brace(&self, position: FilePosition) -> Cancelable<Option<TextSize>> { 270 pub fn matching_brace(&self, position: FilePosition) -> Cancellable<Option<TextSize>> {
271 self.with_db(|db| { 271 self.with_db(|db| {
272 let parse = db.parse(position.file_id); 272 let parse = db.parse(position.file_id);
273 let file = parse.tree(); 273 let file = parse.tree();
@@ -281,30 +281,30 @@ impl Analysis {
281 &self, 281 &self,
282 file_id: FileId, 282 file_id: FileId,
283 text_range: Option<TextRange>, 283 text_range: Option<TextRange>,
284 ) -> Cancelable<String> { 284 ) -> Cancellable<String> {
285 self.with_db(|db| syntax_tree::syntax_tree(&db, file_id, text_range)) 285 self.with_db(|db| syntax_tree::syntax_tree(&db, file_id, text_range))
286 } 286 }
287 287
288 pub fn view_hir(&self, position: FilePosition) -> Cancelable<String> { 288 pub fn view_hir(&self, position: FilePosition) -> Cancellable<String> {
289 self.with_db(|db| view_hir::view_hir(&db, position)) 289 self.with_db(|db| view_hir::view_hir(&db, position))
290 } 290 }
291 291
292 pub fn view_item_tree(&self, file_id: FileId) -> Cancelable<String> { 292 pub fn view_item_tree(&self, file_id: FileId) -> Cancellable<String> {
293 self.with_db(|db| view_item_tree::view_item_tree(&db, file_id)) 293 self.with_db(|db| view_item_tree::view_item_tree(&db, file_id))
294 } 294 }
295 295
296 /// Renders the crate graph to GraphViz "dot" syntax. 296 /// Renders the crate graph to GraphViz "dot" syntax.
297 pub fn view_crate_graph(&self) -> Cancelable<Result<String, String>> { 297 pub fn view_crate_graph(&self) -> Cancellable<Result<String, String>> {
298 self.with_db(|db| view_crate_graph::view_crate_graph(&db)) 298 self.with_db(|db| view_crate_graph::view_crate_graph(&db))
299 } 299 }
300 300
301 pub fn expand_macro(&self, position: FilePosition) -> Cancelable<Option<ExpandedMacro>> { 301 pub fn expand_macro(&self, position: FilePosition) -> Cancellable<Option<ExpandedMacro>> {
302 self.with_db(|db| expand_macro::expand_macro(db, position)) 302 self.with_db(|db| expand_macro::expand_macro(db, position))
303 } 303 }
304 304
305 /// Returns an edit to remove all newlines in the range, cleaning up minor 305 /// Returns an edit to remove all newlines in the range, cleaning up minor
306 /// stuff like trailing commas. 306 /// stuff like trailing commas.
307 pub fn join_lines(&self, frange: FileRange) -> Cancelable<TextEdit> { 307 pub fn join_lines(&self, frange: FileRange) -> Cancellable<TextEdit> {
308 self.with_db(|db| { 308 self.with_db(|db| {
309 let parse = db.parse(frange.file_id); 309 let parse = db.parse(frange.file_id);
310 join_lines::join_lines(&parse.tree(), frange.range) 310 join_lines::join_lines(&parse.tree(), frange.range)
@@ -314,7 +314,7 @@ impl Analysis {
314 /// Returns an edit which should be applied when opening a new line, fixing 314 /// Returns an edit which should be applied when opening a new line, fixing
315 /// up minor stuff like continuing the comment. 315 /// up minor stuff like continuing the comment.
316 /// The edit will be a snippet (with `$0`). 316 /// The edit will be a snippet (with `$0`).
317 pub fn on_enter(&self, position: FilePosition) -> Cancelable<Option<TextEdit>> { 317 pub fn on_enter(&self, position: FilePosition) -> Cancellable<Option<TextEdit>> {
318 self.with_db(|db| typing::on_enter(&db, position)) 318 self.with_db(|db| typing::on_enter(&db, position))
319 } 319 }
320 320
@@ -326,7 +326,7 @@ impl Analysis {
326 &self, 326 &self,
327 position: FilePosition, 327 position: FilePosition,
328 char_typed: char, 328 char_typed: char,
329 ) -> Cancelable<Option<SourceChange>> { 329 ) -> Cancellable<Option<SourceChange>> {
330 // Fast path to not even parse the file. 330 // Fast path to not even parse the file.
331 if !typing::TRIGGER_CHARS.contains(char_typed) { 331 if !typing::TRIGGER_CHARS.contains(char_typed) {
332 return Ok(None); 332 return Ok(None);
@@ -336,7 +336,7 @@ impl Analysis {
336 336
337 /// Returns a tree representation of symbols in the file. Useful to draw a 337 /// Returns a tree representation of symbols in the file. Useful to draw a
338 /// file outline. 338 /// file outline.
339 pub fn file_structure(&self, file_id: FileId) -> Cancelable<Vec<StructureNode>> { 339 pub fn file_structure(&self, file_id: FileId) -> Cancellable<Vec<StructureNode>> {
340 self.with_db(|db| file_structure::file_structure(&db.parse(file_id).tree())) 340 self.with_db(|db| file_structure::file_structure(&db.parse(file_id).tree()))
341 } 341 }
342 342
@@ -345,17 +345,17 @@ impl Analysis {
345 &self, 345 &self,
346 file_id: FileId, 346 file_id: FileId,
347 config: &InlayHintsConfig, 347 config: &InlayHintsConfig,
348 ) -> Cancelable<Vec<InlayHint>> { 348 ) -> Cancellable<Vec<InlayHint>> {
349 self.with_db(|db| inlay_hints::inlay_hints(db, file_id, config)) 349 self.with_db(|db| inlay_hints::inlay_hints(db, file_id, config))
350 } 350 }
351 351
352 /// Returns the set of folding ranges. 352 /// Returns the set of folding ranges.
353 pub fn folding_ranges(&self, file_id: FileId) -> Cancelable<Vec<Fold>> { 353 pub fn folding_ranges(&self, file_id: FileId) -> Cancellable<Vec<Fold>> {
354 self.with_db(|db| folding_ranges::folding_ranges(&db.parse(file_id).tree())) 354 self.with_db(|db| folding_ranges::folding_ranges(&db.parse(file_id).tree()))
355 } 355 }
356 356
357 /// Fuzzy searches for a symbol. 357 /// Fuzzy searches for a symbol.
358 pub fn symbol_search(&self, query: Query) -> Cancelable<Vec<NavigationTarget>> { 358 pub fn symbol_search(&self, query: Query) -> Cancellable<Vec<NavigationTarget>> {
359 self.with_db(|db| { 359 self.with_db(|db| {
360 symbol_index::world_symbols(db, query) 360 symbol_index::world_symbols(db, query)
361 .into_iter() 361 .into_iter()
@@ -368,7 +368,7 @@ impl Analysis {
368 pub fn goto_definition( 368 pub fn goto_definition(
369 &self, 369 &self,
370 position: FilePosition, 370 position: FilePosition,
371 ) -> Cancelable<Option<RangeInfo<Vec<NavigationTarget>>>> { 371 ) -> Cancellable<Option<RangeInfo<Vec<NavigationTarget>>>> {
372 self.with_db(|db| goto_definition::goto_definition(db, position)) 372 self.with_db(|db| goto_definition::goto_definition(db, position))
373 } 373 }
374 374
@@ -376,7 +376,7 @@ impl Analysis {
376 pub fn goto_implementation( 376 pub fn goto_implementation(
377 &self, 377 &self,
378 position: FilePosition, 378 position: FilePosition,
379 ) -> Cancelable<Option<RangeInfo<Vec<NavigationTarget>>>> { 379 ) -> Cancellable<Option<RangeInfo<Vec<NavigationTarget>>>> {
380 self.with_db(|db| goto_implementation::goto_implementation(db, position)) 380 self.with_db(|db| goto_implementation::goto_implementation(db, position))
381 } 381 }
382 382
@@ -384,7 +384,7 @@ impl Analysis {
384 pub fn goto_type_definition( 384 pub fn goto_type_definition(
385 &self, 385 &self,
386 position: FilePosition, 386 position: FilePosition,
387 ) -> Cancelable<Option<RangeInfo<Vec<NavigationTarget>>>> { 387 ) -> Cancellable<Option<RangeInfo<Vec<NavigationTarget>>>> {
388 self.with_db(|db| goto_type_definition::goto_type_definition(db, position)) 388 self.with_db(|db| goto_type_definition::goto_type_definition(db, position))
389 } 389 }
390 390
@@ -393,12 +393,12 @@ impl Analysis {
393 &self, 393 &self,
394 position: FilePosition, 394 position: FilePosition,
395 search_scope: Option<SearchScope>, 395 search_scope: Option<SearchScope>,
396 ) -> Cancelable<Option<ReferenceSearchResult>> { 396 ) -> Cancellable<Option<ReferenceSearchResult>> {
397 self.with_db(|db| references::find_all_refs(&Semantics::new(db), position, search_scope)) 397 self.with_db(|db| references::find_all_refs(&Semantics::new(db), position, search_scope))
398 } 398 }
399 399
400 /// Finds all methods and free functions for the file. Does not return tests! 400 /// Finds all methods and free functions for the file. Does not return tests!
401 pub fn find_all_methods(&self, file_id: FileId) -> Cancelable<Vec<FileRange>> { 401 pub fn find_all_methods(&self, file_id: FileId) -> Cancellable<Vec<FileRange>> {
402 self.with_db(|db| fn_references::find_all_methods(db, file_id)) 402 self.with_db(|db| fn_references::find_all_methods(db, file_id))
403 } 403 }
404 404
@@ -408,7 +408,7 @@ impl Analysis {
408 position: FilePosition, 408 position: FilePosition,
409 links_in_hover: bool, 409 links_in_hover: bool,
410 markdown: bool, 410 markdown: bool,
411 ) -> Cancelable<Option<RangeInfo<HoverResult>>> { 411 ) -> Cancellable<Option<RangeInfo<HoverResult>>> {
412 self.with_db(|db| hover::hover(db, position, links_in_hover, markdown)) 412 self.with_db(|db| hover::hover(db, position, links_in_hover, markdown))
413 } 413 }
414 414
@@ -416,12 +416,12 @@ impl Analysis {
416 pub fn external_docs( 416 pub fn external_docs(
417 &self, 417 &self,
418 position: FilePosition, 418 position: FilePosition,
419 ) -> Cancelable<Option<doc_links::DocumentationLink>> { 419 ) -> Cancellable<Option<doc_links::DocumentationLink>> {
420 self.with_db(|db| doc_links::external_docs(db, &position)) 420 self.with_db(|db| doc_links::external_docs(db, &position))
421 } 421 }
422 422
423 /// Computes parameter information for the given call expression. 423 /// Computes parameter information for the given call expression.
424 pub fn call_info(&self, position: FilePosition) -> Cancelable<Option<CallInfo>> { 424 pub fn call_info(&self, position: FilePosition) -> Cancellable<Option<CallInfo>> {
425 self.with_db(|db| ide_db::call_info::call_info(db, position)) 425 self.with_db(|db| ide_db::call_info::call_info(db, position))
426 } 426 }
427 427
@@ -429,42 +429,42 @@ impl Analysis {
429 pub fn call_hierarchy( 429 pub fn call_hierarchy(
430 &self, 430 &self,
431 position: FilePosition, 431 position: FilePosition,
432 ) -> Cancelable<Option<RangeInfo<Vec<NavigationTarget>>>> { 432 ) -> Cancellable<Option<RangeInfo<Vec<NavigationTarget>>>> {
433 self.with_db(|db| call_hierarchy::call_hierarchy(db, position)) 433 self.with_db(|db| call_hierarchy::call_hierarchy(db, position))
434 } 434 }
435 435
436 /// Computes incoming calls for the given file position. 436 /// Computes incoming calls for the given file position.
437 pub fn incoming_calls(&self, position: FilePosition) -> Cancelable<Option<Vec<CallItem>>> { 437 pub fn incoming_calls(&self, position: FilePosition) -> Cancellable<Option<Vec<CallItem>>> {
438 self.with_db(|db| call_hierarchy::incoming_calls(db, position)) 438 self.with_db(|db| call_hierarchy::incoming_calls(db, position))
439 } 439 }
440 440
441 /// Computes incoming calls for the given file position. 441 /// Computes incoming calls for the given file position.
442 pub fn outgoing_calls(&self, position: FilePosition) -> Cancelable<Option<Vec<CallItem>>> { 442 pub fn outgoing_calls(&self, position: FilePosition) -> Cancellable<Option<Vec<CallItem>>> {
443 self.with_db(|db| call_hierarchy::outgoing_calls(db, position)) 443 self.with_db(|db| call_hierarchy::outgoing_calls(db, position))
444 } 444 }
445 445
446 /// Returns a `mod name;` declaration which created the current module. 446 /// Returns a `mod name;` declaration which created the current module.
447 pub fn parent_module(&self, position: FilePosition) -> Cancelable<Vec<NavigationTarget>> { 447 pub fn parent_module(&self, position: FilePosition) -> Cancellable<Vec<NavigationTarget>> {
448 self.with_db(|db| parent_module::parent_module(db, position)) 448 self.with_db(|db| parent_module::parent_module(db, position))
449 } 449 }
450 450
451 /// Returns crates this file belongs too. 451 /// Returns crates this file belongs too.
452 pub fn crate_for(&self, file_id: FileId) -> Cancelable<Vec<CrateId>> { 452 pub fn crate_for(&self, file_id: FileId) -> Cancellable<Vec<CrateId>> {
453 self.with_db(|db| parent_module::crate_for(db, file_id)) 453 self.with_db(|db| parent_module::crate_for(db, file_id))
454 } 454 }
455 455
456 /// Returns the edition of the given crate. 456 /// Returns the edition of the given crate.
457 pub fn crate_edition(&self, crate_id: CrateId) -> Cancelable<Edition> { 457 pub fn crate_edition(&self, crate_id: CrateId) -> Cancellable<Edition> {
458 self.with_db(|db| db.crate_graph()[crate_id].edition) 458 self.with_db(|db| db.crate_graph()[crate_id].edition)
459 } 459 }
460 460
461 /// Returns the root file of the given crate. 461 /// Returns the root file of the given crate.
462 pub fn crate_root(&self, crate_id: CrateId) -> Cancelable<FileId> { 462 pub fn crate_root(&self, crate_id: CrateId) -> Cancellable<FileId> {
463 self.with_db(|db| db.crate_graph()[crate_id].root_file_id) 463 self.with_db(|db| db.crate_graph()[crate_id].root_file_id)
464 } 464 }
465 465
466 /// Returns the set of possible targets to run for the current file. 466 /// Returns the set of possible targets to run for the current file.
467 pub fn runnables(&self, file_id: FileId) -> Cancelable<Vec<Runnable>> { 467 pub fn runnables(&self, file_id: FileId) -> Cancellable<Vec<Runnable>> {
468 self.with_db(|db| runnables::runnables(db, file_id)) 468 self.with_db(|db| runnables::runnables(db, file_id))
469 } 469 }
470 470
@@ -473,24 +473,24 @@ impl Analysis {
473 &self, 473 &self,
474 position: FilePosition, 474 position: FilePosition,
475 search_scope: Option<SearchScope>, 475 search_scope: Option<SearchScope>,
476 ) -> Cancelable<Vec<Runnable>> { 476 ) -> Cancellable<Vec<Runnable>> {
477 self.with_db(|db| runnables::related_tests(db, position, search_scope)) 477 self.with_db(|db| runnables::related_tests(db, position, search_scope))
478 } 478 }
479 479
480 /// Computes syntax highlighting for the given file 480 /// Computes syntax highlighting for the given file
481 pub fn highlight(&self, file_id: FileId) -> Cancelable<Vec<HlRange>> { 481 pub fn highlight(&self, file_id: FileId) -> Cancellable<Vec<HlRange>> {
482 self.with_db(|db| syntax_highlighting::highlight(db, file_id, None, false)) 482 self.with_db(|db| syntax_highlighting::highlight(db, file_id, None, false))
483 } 483 }
484 484
485 /// Computes syntax highlighting for the given file range. 485 /// Computes syntax highlighting for the given file range.
486 pub fn highlight_range(&self, frange: FileRange) -> Cancelable<Vec<HlRange>> { 486 pub fn highlight_range(&self, frange: FileRange) -> Cancellable<Vec<HlRange>> {
487 self.with_db(|db| { 487 self.with_db(|db| {
488 syntax_highlighting::highlight(db, frange.file_id, Some(frange.range), false) 488 syntax_highlighting::highlight(db, frange.file_id, Some(frange.range), false)
489 }) 489 })
490 } 490 }
491 491
492 /// Computes syntax highlighting for the given file. 492 /// Computes syntax highlighting for the given file.
493 pub fn highlight_as_html(&self, file_id: FileId, rainbow: bool) -> Cancelable<String> { 493 pub fn highlight_as_html(&self, file_id: FileId, rainbow: bool) -> Cancellable<String> {
494 self.with_db(|db| syntax_highlighting::highlight_as_html(db, file_id, rainbow)) 494 self.with_db(|db| syntax_highlighting::highlight_as_html(db, file_id, rainbow))
495 } 495 }
496 496
@@ -499,7 +499,7 @@ impl Analysis {
499 &self, 499 &self,
500 config: &CompletionConfig, 500 config: &CompletionConfig,
501 position: FilePosition, 501 position: FilePosition,
502 ) -> Cancelable<Option<Vec<CompletionItem>>> { 502 ) -> Cancellable<Option<Vec<CompletionItem>>> {
503 self.with_db(|db| ide_completion::completions(db, config, position).map(Into::into)) 503 self.with_db(|db| ide_completion::completions(db, config, position).map(Into::into))
504 } 504 }
505 505
@@ -510,7 +510,7 @@ impl Analysis {
510 position: FilePosition, 510 position: FilePosition,
511 full_import_path: &str, 511 full_import_path: &str,
512 imported_name: String, 512 imported_name: String,
513 ) -> Cancelable<Vec<TextEdit>> { 513 ) -> Cancellable<Vec<TextEdit>> {
514 Ok(self 514 Ok(self
515 .with_db(|db| { 515 .with_db(|db| {
516 ide_completion::resolve_completion_edits( 516 ide_completion::resolve_completion_edits(
@@ -533,7 +533,7 @@ impl Analysis {
533 config: &AssistConfig, 533 config: &AssistConfig,
534 resolve: AssistResolveStrategy, 534 resolve: AssistResolveStrategy,
535 frange: FileRange, 535 frange: FileRange,
536 ) -> Cancelable<Vec<Assist>> { 536 ) -> Cancellable<Vec<Assist>> {
537 self.with_db(|db| { 537 self.with_db(|db| {
538 let ssr_assists = ssr::ssr_assists(db, &resolve, frange); 538 let ssr_assists = ssr::ssr_assists(db, &resolve, frange);
539 let mut acc = Assist::get(db, config, resolve, frange); 539 let mut acc = Assist::get(db, config, resolve, frange);
@@ -548,7 +548,7 @@ impl Analysis {
548 config: &DiagnosticsConfig, 548 config: &DiagnosticsConfig,
549 resolve: AssistResolveStrategy, 549 resolve: AssistResolveStrategy,
550 file_id: FileId, 550 file_id: FileId,
551 ) -> Cancelable<Vec<Diagnostic>> { 551 ) -> Cancellable<Vec<Diagnostic>> {
552 self.with_db(|db| diagnostics::diagnostics(db, config, &resolve, file_id)) 552 self.with_db(|db| diagnostics::diagnostics(db, config, &resolve, file_id))
553 } 553 }
554 554
@@ -559,7 +559,7 @@ impl Analysis {
559 diagnostics_config: &DiagnosticsConfig, 559 diagnostics_config: &DiagnosticsConfig,
560 resolve: AssistResolveStrategy, 560 resolve: AssistResolveStrategy,
561 frange: FileRange, 561 frange: FileRange,
562 ) -> Cancelable<Vec<Assist>> { 562 ) -> Cancellable<Vec<Assist>> {
563 let include_fixes = match &assist_config.allowed { 563 let include_fixes = match &assist_config.allowed {
564 Some(it) => it.iter().any(|&it| it == AssistKind::None || it == AssistKind::QuickFix), 564 Some(it) => it.iter().any(|&it| it == AssistKind::None || it == AssistKind::QuickFix),
565 None => true, 565 None => true,
@@ -591,14 +591,14 @@ impl Analysis {
591 &self, 591 &self,
592 position: FilePosition, 592 position: FilePosition,
593 new_name: &str, 593 new_name: &str,
594 ) -> Cancelable<Result<SourceChange, RenameError>> { 594 ) -> Cancellable<Result<SourceChange, RenameError>> {
595 self.with_db(|db| references::rename::rename(db, position, new_name)) 595 self.with_db(|db| references::rename::rename(db, position, new_name))
596 } 596 }
597 597
598 pub fn prepare_rename( 598 pub fn prepare_rename(
599 &self, 599 &self,
600 position: FilePosition, 600 position: FilePosition,
601 ) -> Cancelable<Result<RangeInfo<()>, RenameError>> { 601 ) -> Cancellable<Result<RangeInfo<()>, RenameError>> {
602 self.with_db(|db| references::rename::prepare_rename(db, position)) 602 self.with_db(|db| references::rename::prepare_rename(db, position))
603 } 603 }
604 604
@@ -606,7 +606,7 @@ impl Analysis {
606 &self, 606 &self,
607 file_id: FileId, 607 file_id: FileId,
608 new_name_stem: &str, 608 new_name_stem: &str,
609 ) -> Cancelable<Option<SourceChange>> { 609 ) -> Cancellable<Option<SourceChange>> {
610 self.with_db(|db| references::rename::will_rename_file(db, file_id, new_name_stem)) 610 self.with_db(|db| references::rename::will_rename_file(db, file_id, new_name_stem))
611 } 611 }
612 612
@@ -616,7 +616,7 @@ impl Analysis {
616 parse_only: bool, 616 parse_only: bool,
617 resolve_context: FilePosition, 617 resolve_context: FilePosition,
618 selections: Vec<FileRange>, 618 selections: Vec<FileRange>,
619 ) -> Cancelable<Result<SourceChange, SsrError>> { 619 ) -> Cancellable<Result<SourceChange, SsrError>> {
620 self.with_db(|db| { 620 self.with_db(|db| {
621 let rule: ide_ssr::SsrRule = query.parse()?; 621 let rule: ide_ssr::SsrRule = query.parse()?;
622 let mut match_finder = 622 let mut match_finder =
@@ -631,11 +631,11 @@ impl Analysis {
631 &self, 631 &self,
632 file_id: FileId, 632 file_id: FileId,
633 config: AnnotationConfig, 633 config: AnnotationConfig,
634 ) -> Cancelable<Vec<Annotation>> { 634 ) -> Cancellable<Vec<Annotation>> {
635 self.with_db(|db| annotations::annotations(db, file_id, config)) 635 self.with_db(|db| annotations::annotations(db, file_id, config))
636 } 636 }
637 637
638 pub fn resolve_annotation(&self, annotation: Annotation) -> Cancelable<Annotation> { 638 pub fn resolve_annotation(&self, annotation: Annotation) -> Cancellable<Annotation> {
639 self.with_db(|db| annotations::resolve_annotation(db, annotation)) 639 self.with_db(|db| annotations::resolve_annotation(db, annotation))
640 } 640 }
641 641
@@ -643,16 +643,28 @@ impl Analysis {
643 &self, 643 &self,
644 range: FileRange, 644 range: FileRange,
645 direction: Direction, 645 direction: Direction,
646 ) -> Cancelable<Option<TextEdit>> { 646 ) -> Cancellable<Option<TextEdit>> {
647 self.with_db(|db| move_item::move_item(db, range, direction)) 647 self.with_db(|db| move_item::move_item(db, range, direction))
648 } 648 }
649 649
650 /// Performs an operation on that may be Canceled. 650 /// Performs an operation on the database that may be canceled.
651 fn with_db<F, T>(&self, f: F) -> Cancelable<T> 651 ///
652 /// rust-analyzer needs to be able to answer semantic questions about the
653 /// code while the code is being modified. A common problem is that a
654 /// long-running query is being calculated when a new change arrives.
655 ///
656 /// We can't just apply the change immediately: this will cause the pending
657 /// query to see inconsistent state (it will observe an absence of
658 /// repeatable read). So what we do is we **cancel** all pending queries
659 /// before applying the change.
660 ///
661 /// Salsa implements cancelation by unwinding with a special value and
662 /// catching it on the API boundary.
663 fn with_db<F, T>(&self, f: F) -> Cancellable<T>
652 where 664 where
653 F: FnOnce(&RootDatabase) -> T + std::panic::UnwindSafe, 665 F: FnOnce(&RootDatabase) -> T + std::panic::UnwindSafe,
654 { 666 {
655 self.db.catch_canceled(f) 667 Cancelled::catch(|| f(&self.db))
656 } 668 }
657} 669}
658 670