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-rw-r--r--crates/ra_analysis/src/completion.rs622
-rw-r--r--crates/ra_analysis/src/descriptors/module/scope.rs6
-rw-r--r--crates/ra_analysis/src/imp.rs10
-rw-r--r--crates/ra_analysis/src/lib.rs9
-rw-r--r--crates/ra_analysis/src/mock_analysis.rs71
-rw-r--r--crates/ra_analysis/tests/tests.rs56
6 files changed, 711 insertions, 63 deletions
diff --git a/crates/ra_analysis/src/completion.rs b/crates/ra_analysis/src/completion.rs
index 869ab5afb..340ae3f66 100644
--- a/crates/ra_analysis/src/completion.rs
+++ b/crates/ra_analysis/src/completion.rs
@@ -1,7 +1,10 @@
1use ra_editor::{CompletionItem, find_node_at_offset}; 1use rustc_hash::{FxHashMap, FxHashSet};
2use ra_editor::{find_node_at_offset};
2use ra_syntax::{ 3use ra_syntax::{
3 AtomEdit, File, TextUnit, AstNode, 4 AtomEdit, File, TextUnit, AstNode, SyntaxNodeRef,
4 ast, 5 algo::visit::{visitor, visitor_ctx, Visitor, VisitorCtx},
6 ast::{self, AstChildren, LoopBodyOwner, ModuleItemOwner},
7 SyntaxKind::*,
5}; 8};
6 9
7use crate::{ 10use crate::{
@@ -9,9 +12,21 @@ use crate::{
9 input::FilesDatabase, 12 input::FilesDatabase,
10 db::{self, SyntaxDatabase}, 13 db::{self, SyntaxDatabase},
11 descriptors::DescriptorDatabase, 14 descriptors::DescriptorDatabase,
12 descriptors::module::{ModuleTree, ModuleId}, 15 descriptors::function::FnScopes,
16 descriptors::module::{ModuleTree, ModuleId, ModuleScope},
13}; 17};
14 18
19
20#[derive(Debug)]
21pub struct CompletionItem {
22 /// What user sees in pop-up
23 pub label: String,
24 /// What string is used for filtering, defaults to label
25 pub lookup: Option<String>,
26 /// What is inserted, defaults to label
27 pub snippet: Option<String>,
28}
29
15pub(crate) fn resolve_based_completion(db: &db::RootDatabase, file_id: FileId, offset: TextUnit) -> Cancelable<Option<Vec<CompletionItem>>> { 30pub(crate) fn resolve_based_completion(db: &db::RootDatabase, file_id: FileId, offset: TextUnit) -> Cancelable<Option<Vec<CompletionItem>>> {
16 let source_root_id = db.file_source_root(file_id); 31 let source_root_id = db.file_source_root(file_id);
17 let file = db.file_syntax(file_id); 32 let file = db.file_syntax(file_id);
@@ -73,3 +88,602 @@ fn crate_path(name_ref: ast::NameRef) -> Option<Vec<ast::NameRef>> {
73 res.reverse(); 88 res.reverse();
74 Some(res) 89 Some(res)
75} 90}
91
92
93pub(crate) fn scope_completion(
94 db: &db::RootDatabase,
95 file_id: FileId,
96 offset: TextUnit,
97) -> Option<Vec<CompletionItem>> {
98 let original_file = db.file_syntax(file_id);
99 // Insert a fake ident to get a valid parse tree
100 let file = {
101 let edit = AtomEdit::insert(offset, "intellijRulezz".to_string());
102 original_file.reparse(&edit)
103 };
104 let mut has_completions = false;
105 let mut res = Vec::new();
106 if let Some(name_ref) = find_node_at_offset::<ast::NameRef>(file.syntax(), offset) {
107 has_completions = true;
108 complete_name_ref(&file, name_ref, &mut res);
109 // special case, `trait T { fn foo(i_am_a_name_ref) {} }`
110 if is_node::<ast::Param>(name_ref.syntax()) {
111 param_completions(name_ref.syntax(), &mut res);
112 }
113 let name_range = name_ref.syntax().range();
114 let top_node = name_ref
115 .syntax()
116 .ancestors()
117 .take_while(|it| it.range() == name_range)
118 .last()
119 .unwrap();
120 match top_node.parent().map(|it| it.kind()) {
121 Some(ROOT) | Some(ITEM_LIST) => complete_mod_item_snippets(&mut res),
122 _ => (),
123 }
124 }
125 if let Some(name) = find_node_at_offset::<ast::Name>(file.syntax(), offset) {
126 if is_node::<ast::Param>(name.syntax()) {
127 has_completions = true;
128 param_completions(name.syntax(), &mut res);
129 }
130 }
131 if has_completions {
132 Some(res)
133 } else {
134 None
135 }
136}
137
138fn complete_module_items(
139 file: &File,
140 items: AstChildren<ast::ModuleItem>,
141 this_item: Option<ast::NameRef>,
142 acc: &mut Vec<CompletionItem>,
143) {
144 let scope = ModuleScope::from_items(items);
145 acc.extend(
146 scope
147 .entries()
148 .iter()
149 .filter(|entry| {
150 let syntax = entry.ptr().resolve(file);
151 Some(syntax.borrowed()) != this_item.map(|it| it.syntax())
152 })
153 .map(|entry| CompletionItem {
154 label: entry.name().to_string(),
155 lookup: None,
156 snippet: None,
157 }),
158 );
159}
160
161fn complete_name_ref(
162 file: &File,
163 name_ref: ast::NameRef,
164 acc: &mut Vec<CompletionItem>,
165) {
166 if !is_node::<ast::Path>(name_ref.syntax()) {
167 return;
168 }
169 let mut visited_fn = false;
170 for node in name_ref.syntax().ancestors() {
171 if let Some(items) = visitor()
172 .visit::<ast::Root, _>(|it| Some(it.items()))
173 .visit::<ast::Module, _>(|it| Some(it.item_list()?.items()))
174 .accept(node)
175 {
176 if let Some(items) = items {
177 complete_module_items(file, items, Some(name_ref), acc);
178 }
179 break;
180 } else if !visited_fn {
181 if let Some(fn_def) = ast::FnDef::cast(node) {
182 visited_fn = true;
183 complete_expr_keywords(&file, fn_def, name_ref, acc);
184 complete_expr_snippets(acc);
185 let scopes = FnScopes::new(fn_def);
186 complete_fn(name_ref, &scopes, acc);
187 }
188 }
189 }
190}
191
192fn param_completions(ctx: SyntaxNodeRef, acc: &mut Vec<CompletionItem>) {
193 let mut params = FxHashMap::default();
194 for node in ctx.ancestors() {
195 let _ = visitor_ctx(&mut params)
196 .visit::<ast::Root, _>(process)
197 .visit::<ast::ItemList, _>(process)
198 .accept(node);
199 }
200 params
201 .into_iter()
202 .filter_map(|(label, (count, param))| {
203 let lookup = param.pat()?.syntax().text().to_string();
204 if count < 2 {
205 None
206 } else {
207 Some((label, lookup))
208 }
209 })
210 .for_each(|(label, lookup)| {
211 acc.push(CompletionItem {
212 label,
213 lookup: Some(lookup),
214 snippet: None,
215 })
216 });
217
218 fn process<'a, N: ast::FnDefOwner<'a>>(
219 node: N,
220 params: &mut FxHashMap<String, (u32, ast::Param<'a>)>,
221 ) {
222 node.functions()
223 .filter_map(|it| it.param_list())
224 .flat_map(|it| it.params())
225 .for_each(|param| {
226 let text = param.syntax().text().to_string();
227 params.entry(text).or_insert((0, param)).0 += 1;
228 })
229 }
230}
231
232fn is_node<'a, N: AstNode<'a>>(node: SyntaxNodeRef<'a>) -> bool {
233 match node.ancestors().filter_map(N::cast).next() {
234 None => false,
235 Some(n) => n.syntax().range() == node.range(),
236 }
237}
238
239fn complete_expr_keywords(
240 file: &File,
241 fn_def: ast::FnDef,
242 name_ref: ast::NameRef,
243 acc: &mut Vec<CompletionItem>,
244) {
245 acc.push(keyword("if", "if $0 {}"));
246 acc.push(keyword("match", "match $0 {}"));
247 acc.push(keyword("while", "while $0 {}"));
248 acc.push(keyword("loop", "loop {$0}"));
249
250 if let Some(off) = name_ref.syntax().range().start().checked_sub(2.into()) {
251 if let Some(if_expr) = find_node_at_offset::<ast::IfExpr>(file.syntax(), off) {
252 if if_expr.syntax().range().end() < name_ref.syntax().range().start() {
253 acc.push(keyword("else", "else {$0}"));
254 acc.push(keyword("else if", "else if $0 {}"));
255 }
256 }
257 }
258 if is_in_loop_body(name_ref) {
259 acc.push(keyword("continue", "continue"));
260 acc.push(keyword("break", "break"));
261 }
262 acc.extend(complete_return(fn_def, name_ref));
263}
264
265fn is_in_loop_body(name_ref: ast::NameRef) -> bool {
266 for node in name_ref.syntax().ancestors() {
267 if node.kind() == FN_DEF || node.kind() == LAMBDA_EXPR {
268 break;
269 }
270 let loop_body = visitor()
271 .visit::<ast::ForExpr, _>(LoopBodyOwner::loop_body)
272 .visit::<ast::WhileExpr, _>(LoopBodyOwner::loop_body)
273 .visit::<ast::LoopExpr, _>(LoopBodyOwner::loop_body)
274 .accept(node);
275 if let Some(Some(body)) = loop_body {
276 if name_ref.syntax().range().is_subrange(&body.syntax().range()) {
277 return true;
278 }
279 }
280 }
281 false
282}
283
284fn complete_return(fn_def: ast::FnDef, name_ref: ast::NameRef) -> Option<CompletionItem> {
285 // let is_last_in_block = name_ref.syntax().ancestors().filter_map(ast::Expr::cast)
286 // .next()
287 // .and_then(|it| it.syntax().parent())
288 // .and_then(ast::Block::cast)
289 // .is_some();
290
291 // if is_last_in_block {
292 // return None;
293 // }
294
295 let is_stmt = match name_ref
296 .syntax()
297 .ancestors()
298 .filter_map(ast::ExprStmt::cast)
299 .next()
300 {
301 None => false,
302 Some(expr_stmt) => expr_stmt.syntax().range() == name_ref.syntax().range(),
303 };
304 let snip = match (is_stmt, fn_def.ret_type().is_some()) {
305 (true, true) => "return $0;",
306 (true, false) => "return;",
307 (false, true) => "return $0",
308 (false, false) => "return",
309 };
310 Some(keyword("return", snip))
311}
312
313fn keyword(kw: &str, snip: &str) -> CompletionItem {
314 CompletionItem {
315 label: kw.to_string(),
316 lookup: None,
317 snippet: Some(snip.to_string()),
318 }
319}
320
321fn complete_expr_snippets(acc: &mut Vec<CompletionItem>) {
322 acc.push(CompletionItem {
323 label: "pd".to_string(),
324 lookup: None,
325 snippet: Some("eprintln!(\"$0 = {:?}\", $0);".to_string()),
326 });
327 acc.push(CompletionItem {
328 label: "ppd".to_string(),
329 lookup: None,
330 snippet: Some("eprintln!(\"$0 = {:#?}\", $0);".to_string()),
331 });
332}
333
334fn complete_mod_item_snippets(acc: &mut Vec<CompletionItem>) {
335 acc.push(CompletionItem {
336 label: "tfn".to_string(),
337 lookup: None,
338 snippet: Some("#[test]\nfn $1() {\n $0\n}".to_string()),
339 });
340 acc.push(CompletionItem {
341 label: "pub(crate)".to_string(),
342 lookup: None,
343 snippet: Some("pub(crate) $0".to_string()),
344 })
345}
346
347fn complete_fn(name_ref: ast::NameRef, scopes: &FnScopes, acc: &mut Vec<CompletionItem>) {
348 let mut shadowed = FxHashSet::default();
349 acc.extend(
350 scopes
351 .scope_chain(name_ref.syntax())
352 .flat_map(|scope| scopes.entries(scope).iter())
353 .filter(|entry| shadowed.insert(entry.name()))
354 .map(|entry| CompletionItem {
355 label: entry.name().to_string(),
356 lookup: None,
357 snippet: None,
358 }),
359 );
360 if scopes.self_param.is_some() {
361 acc.push(CompletionItem {
362 label: "self".to_string(),
363 lookup: None,
364 snippet: None,
365 })
366 }
367}
368
369#[cfg(test)]
370mod tests {
371 use test_utils::{assert_eq_dbg, extract_offset};
372
373 use crate::FileId;
374 use crate::mock_analysis::MockAnalysis;
375
376 use super::*;
377
378 fn check_scope_completion(code: &str, expected_completions: &str) {
379 let (off, code) = extract_offset(&code);
380 let analysis = MockAnalysis::with_files(&[("/main.rs", &code)]).analysis();
381 let file_id = FileId(1);
382 let completions = scope_completion(&analysis.imp.db, file_id, off)
383 .unwrap()
384 .into_iter()
385 .filter(|c| c.snippet.is_none())
386 .collect::<Vec<_>>();
387 assert_eq_dbg(expected_completions, &completions);
388 }
389
390 fn check_snippet_completion(code: &str, expected_completions: &str) {
391 let (off, code) = extract_offset(&code);
392 let analysis = MockAnalysis::with_files(&[("/main.rs", &code)]).analysis();
393 let file_id = FileId(1);
394 let completions = scope_completion(&analysis.imp.db, file_id, off)
395 .unwrap()
396 .into_iter()
397 .filter(|c| c.snippet.is_some())
398 .collect::<Vec<_>>();
399 assert_eq_dbg(expected_completions, &completions);
400 }
401
402 #[test]
403 fn test_completion_let_scope() {
404 check_scope_completion(
405 r"
406 fn quux(x: i32) {
407 let y = 92;
408 1 + <|>;
409 let z = ();
410 }
411 ",
412 r#"[CompletionItem { label: "y", lookup: None, snippet: None },
413 CompletionItem { label: "x", lookup: None, snippet: None },
414 CompletionItem { label: "quux", lookup: None, snippet: None }]"#,
415 );
416 }
417
418 #[test]
419 fn test_completion_if_let_scope() {
420 check_scope_completion(
421 r"
422 fn quux() {
423 if let Some(x) = foo() {
424 let y = 92;
425 };
426 if let Some(a) = bar() {
427 let b = 62;
428 1 + <|>
429 }
430 }
431 ",
432 r#"[CompletionItem { label: "b", lookup: None, snippet: None },
433 CompletionItem { label: "a", lookup: None, snippet: None },
434 CompletionItem { label: "quux", lookup: None, snippet: None }]"#,
435 );
436 }
437
438 #[test]
439 fn test_completion_for_scope() {
440 check_scope_completion(
441 r"
442 fn quux() {
443 for x in &[1, 2, 3] {
444 <|>
445 }
446 }
447 ",
448 r#"[CompletionItem { label: "x", lookup: None, snippet: None },
449 CompletionItem { label: "quux", lookup: None, snippet: None }]"#,
450 );
451 }
452
453 #[test]
454 fn test_completion_mod_scope() {
455 check_scope_completion(
456 r"
457 struct Foo;
458 enum Baz {}
459 fn quux() {
460 <|>
461 }
462 ",
463 r#"[CompletionItem { label: "Foo", lookup: None, snippet: None },
464 CompletionItem { label: "Baz", lookup: None, snippet: None },
465 CompletionItem { label: "quux", lookup: None, snippet: None }]"#,
466 );
467 }
468
469 #[test]
470 fn test_completion_mod_scope_no_self_use() {
471 check_scope_completion(
472 r"
473 use foo<|>;
474 ",
475 r#"[]"#,
476 );
477 }
478
479 #[test]
480 fn test_completion_mod_scope_nested() {
481 check_scope_completion(
482 r"
483 struct Foo;
484 mod m {
485 struct Bar;
486 fn quux() { <|> }
487 }
488 ",
489 r#"[CompletionItem { label: "Bar", lookup: None, snippet: None },
490 CompletionItem { label: "quux", lookup: None, snippet: None }]"#,
491 );
492 }
493
494 #[test]
495 fn test_complete_type() {
496 check_scope_completion(
497 r"
498 struct Foo;
499 fn x() -> <|>
500 ",
501 r#"[CompletionItem { label: "Foo", lookup: None, snippet: None },
502 CompletionItem { label: "x", lookup: None, snippet: None }]"#,
503 )
504 }
505
506 #[test]
507 fn test_complete_shadowing() {
508 check_scope_completion(
509 r"
510 fn foo() -> {
511 let bar = 92;
512 {
513 let bar = 62;
514 <|>
515 }
516 }
517 ",
518 r#"[CompletionItem { label: "bar", lookup: None, snippet: None },
519 CompletionItem { label: "foo", lookup: None, snippet: None }]"#,
520 )
521 }
522
523 #[test]
524 fn test_complete_self() {
525 check_scope_completion(
526 r"
527 impl S { fn foo(&self) { <|> } }
528 ",
529 r#"[CompletionItem { label: "self", lookup: None, snippet: None }]"#,
530 )
531 }
532
533 #[test]
534 fn test_completion_kewords() {
535 check_snippet_completion(r"
536 fn quux() {
537 <|>
538 }
539 ", r#"[CompletionItem { label: "if", lookup: None, snippet: Some("if $0 {}") },
540 CompletionItem { label: "match", lookup: None, snippet: Some("match $0 {}") },
541 CompletionItem { label: "while", lookup: None, snippet: Some("while $0 {}") },
542 CompletionItem { label: "loop", lookup: None, snippet: Some("loop {$0}") },
543 CompletionItem { label: "return", lookup: None, snippet: Some("return") },
544 CompletionItem { label: "pd", lookup: None, snippet: Some("eprintln!(\"$0 = {:?}\", $0);") },
545 CompletionItem { label: "ppd", lookup: None, snippet: Some("eprintln!(\"$0 = {:#?}\", $0);") }]"#);
546 }
547
548 #[test]
549 fn test_completion_else() {
550 check_snippet_completion(r"
551 fn quux() {
552 if true {
553 ()
554 } <|>
555 }
556 ", r#"[CompletionItem { label: "if", lookup: None, snippet: Some("if $0 {}") },
557 CompletionItem { label: "match", lookup: None, snippet: Some("match $0 {}") },
558 CompletionItem { label: "while", lookup: None, snippet: Some("while $0 {}") },
559 CompletionItem { label: "loop", lookup: None, snippet: Some("loop {$0}") },
560 CompletionItem { label: "else", lookup: None, snippet: Some("else {$0}") },
561 CompletionItem { label: "else if", lookup: None, snippet: Some("else if $0 {}") },
562 CompletionItem { label: "return", lookup: None, snippet: Some("return") },
563 CompletionItem { label: "pd", lookup: None, snippet: Some("eprintln!(\"$0 = {:?}\", $0);") },
564 CompletionItem { label: "ppd", lookup: None, snippet: Some("eprintln!(\"$0 = {:#?}\", $0);") }]"#);
565 }
566
567 #[test]
568 fn test_completion_return_value() {
569 check_snippet_completion(r"
570 fn quux() -> i32 {
571 <|>
572 92
573 }
574 ", r#"[CompletionItem { label: "if", lookup: None, snippet: Some("if $0 {}") },
575 CompletionItem { label: "match", lookup: None, snippet: Some("match $0 {}") },
576 CompletionItem { label: "while", lookup: None, snippet: Some("while $0 {}") },
577 CompletionItem { label: "loop", lookup: None, snippet: Some("loop {$0}") },
578 CompletionItem { label: "return", lookup: None, snippet: Some("return $0;") },
579 CompletionItem { label: "pd", lookup: None, snippet: Some("eprintln!(\"$0 = {:?}\", $0);") },
580 CompletionItem { label: "ppd", lookup: None, snippet: Some("eprintln!(\"$0 = {:#?}\", $0);") }]"#);
581 check_snippet_completion(r"
582 fn quux() {
583 <|>
584 92
585 }
586 ", r#"[CompletionItem { label: "if", lookup: None, snippet: Some("if $0 {}") },
587 CompletionItem { label: "match", lookup: None, snippet: Some("match $0 {}") },
588 CompletionItem { label: "while", lookup: None, snippet: Some("while $0 {}") },
589 CompletionItem { label: "loop", lookup: None, snippet: Some("loop {$0}") },
590 CompletionItem { label: "return", lookup: None, snippet: Some("return;") },
591 CompletionItem { label: "pd", lookup: None, snippet: Some("eprintln!(\"$0 = {:?}\", $0);") },
592 CompletionItem { label: "ppd", lookup: None, snippet: Some("eprintln!(\"$0 = {:#?}\", $0);") }]"#);
593 }
594
595 #[test]
596 fn test_completion_return_no_stmt() {
597 check_snippet_completion(r"
598 fn quux() -> i32 {
599 match () {
600 () => <|>
601 }
602 }
603 ", r#"[CompletionItem { label: "if", lookup: None, snippet: Some("if $0 {}") },
604 CompletionItem { label: "match", lookup: None, snippet: Some("match $0 {}") },
605 CompletionItem { label: "while", lookup: None, snippet: Some("while $0 {}") },
606 CompletionItem { label: "loop", lookup: None, snippet: Some("loop {$0}") },
607 CompletionItem { label: "return", lookup: None, snippet: Some("return $0") },
608 CompletionItem { label: "pd", lookup: None, snippet: Some("eprintln!(\"$0 = {:?}\", $0);") },
609 CompletionItem { label: "ppd", lookup: None, snippet: Some("eprintln!(\"$0 = {:#?}\", $0);") }]"#);
610 }
611
612 #[test]
613 fn test_continue_break_completion() {
614 check_snippet_completion(r"
615 fn quux() -> i32 {
616 loop { <|> }
617 }
618 ", r#"[CompletionItem { label: "if", lookup: None, snippet: Some("if $0 {}") },
619 CompletionItem { label: "match", lookup: None, snippet: Some("match $0 {}") },
620 CompletionItem { label: "while", lookup: None, snippet: Some("while $0 {}") },
621 CompletionItem { label: "loop", lookup: None, snippet: Some("loop {$0}") },
622 CompletionItem { label: "continue", lookup: None, snippet: Some("continue") },
623 CompletionItem { label: "break", lookup: None, snippet: Some("break") },
624 CompletionItem { label: "return", lookup: None, snippet: Some("return $0") },
625 CompletionItem { label: "pd", lookup: None, snippet: Some("eprintln!(\"$0 = {:?}\", $0);") },
626 CompletionItem { label: "ppd", lookup: None, snippet: Some("eprintln!(\"$0 = {:#?}\", $0);") }]"#);
627 check_snippet_completion(r"
628 fn quux() -> i32 {
629 loop { || { <|> } }
630 }
631 ", r#"[CompletionItem { label: "if", lookup: None, snippet: Some("if $0 {}") },
632 CompletionItem { label: "match", lookup: None, snippet: Some("match $0 {}") },
633 CompletionItem { label: "while", lookup: None, snippet: Some("while $0 {}") },
634 CompletionItem { label: "loop", lookup: None, snippet: Some("loop {$0}") },
635 CompletionItem { label: "return", lookup: None, snippet: Some("return $0") },
636 CompletionItem { label: "pd", lookup: None, snippet: Some("eprintln!(\"$0 = {:?}\", $0);") },
637 CompletionItem { label: "ppd", lookup: None, snippet: Some("eprintln!(\"$0 = {:#?}\", $0);") }]"#);
638 }
639
640 #[test]
641 fn test_param_completion_last_param() {
642 check_scope_completion(r"
643 fn foo(file_id: FileId) {}
644 fn bar(file_id: FileId) {}
645 fn baz(file<|>) {}
646 ", r#"[CompletionItem { label: "file_id: FileId", lookup: Some("file_id"), snippet: None }]"#);
647 }
648
649 #[test]
650 fn test_param_completion_nth_param() {
651 check_scope_completion(r"
652 fn foo(file_id: FileId) {}
653 fn bar(file_id: FileId) {}
654 fn baz(file<|>, x: i32) {}
655 ", r#"[CompletionItem { label: "file_id: FileId", lookup: Some("file_id"), snippet: None }]"#);
656 }
657
658 #[test]
659 fn test_param_completion_trait_param() {
660 check_scope_completion(r"
661 pub(crate) trait SourceRoot {
662 pub fn contains(&self, file_id: FileId) -> bool;
663 pub fn module_map(&self) -> &ModuleMap;
664 pub fn lines(&self, file_id: FileId) -> &LineIndex;
665 pub fn syntax(&self, file<|>)
666 }
667 ", r#"[CompletionItem { label: "self", lookup: None, snippet: None },
668 CompletionItem { label: "SourceRoot", lookup: None, snippet: None },
669 CompletionItem { label: "file_id: FileId", lookup: Some("file_id"), snippet: None }]"#);
670 }
671
672 #[test]
673 fn test_item_snippets() {
674 // check_snippet_completion(r"
675 // <|>
676 // ",
677 // r##"[CompletionItem { label: "tfn", lookup: None, snippet: Some("#[test]\nfn $1() {\n $0\n}") }]"##,
678 // );
679 check_snippet_completion(r"
680 #[cfg(test)]
681 mod tests {
682 <|>
683 }
684 ",
685 r##"[CompletionItem { label: "tfn", lookup: None, snippet: Some("#[test]\nfn $1() {\n $0\n}") },
686 CompletionItem { label: "pub(crate)", lookup: None, snippet: Some("pub(crate) $0") }]"##,
687 );
688 }
689}
diff --git a/crates/ra_analysis/src/descriptors/module/scope.rs b/crates/ra_analysis/src/descriptors/module/scope.rs
index 0f8f325ab..846b8b44f 100644
--- a/crates/ra_analysis/src/descriptors/module/scope.rs
+++ b/crates/ra_analysis/src/descriptors/module/scope.rs
@@ -30,8 +30,12 @@ enum EntryKind {
30 30
31impl ModuleScope { 31impl ModuleScope {
32 pub fn new(file: &File) -> ModuleScope { 32 pub fn new(file: &File) -> ModuleScope {
33 ModuleScope::from_items(file.ast().items())
34 }
35
36 pub fn from_items<'a>(items: impl Iterator<Item = ast::ModuleItem<'a>>) -> ModuleScope {
33 let mut entries = Vec::new(); 37 let mut entries = Vec::new();
34 for item in file.ast().items() { 38 for item in items {
35 let entry = match item { 39 let entry = match item {
36 ast::ModuleItem::StructDef(item) => Entry::new(item), 40 ast::ModuleItem::StructDef(item) => Entry::new(item),
37 ast::ModuleItem::EnumDef(item) => Entry::new(item), 41 ast::ModuleItem::EnumDef(item) => Entry::new(item),
diff --git a/crates/ra_analysis/src/imp.rs b/crates/ra_analysis/src/imp.rs
index 6473a1dbc..38d4b6a23 100644
--- a/crates/ra_analysis/src/imp.rs
+++ b/crates/ra_analysis/src/imp.rs
@@ -3,7 +3,7 @@ use std::{
3 sync::Arc, 3 sync::Arc,
4}; 4};
5 5
6use ra_editor::{self, find_node_at_offset, FileSymbol, LineIndex, LocalEdit, CompletionItem}; 6use ra_editor::{self, find_node_at_offset, FileSymbol, LineIndex, LocalEdit};
7use ra_syntax::{ 7use ra_syntax::{
8 ast::{self, ArgListOwner, Expr, NameOwner}, 8 ast::{self, ArgListOwner, Expr, NameOwner},
9 AstNode, File, SmolStr, 9 AstNode, File, SmolStr,
@@ -26,6 +26,7 @@ use crate::{
26 module::{ModuleTree, Problem}, 26 module::{ModuleTree, Problem},
27 function::{FnDescriptor, FnId}, 27 function::{FnDescriptor, FnId},
28 }, 28 },
29 completion::{scope_completion, resolve_based_completion, CompletionItem},
29 symbol_index::SymbolIndex, 30 symbol_index::SymbolIndex,
30 syntax_ptr::SyntaxPtrDatabase, 31 syntax_ptr::SyntaxPtrDatabase,
31 CrateGraph, CrateId, Diagnostic, FileId, FileResolver, FileSystemEdit, Position, 32 CrateGraph, CrateId, Diagnostic, FileId, FileResolver, FileSystemEdit, Position,
@@ -179,7 +180,7 @@ impl AnalysisHostImpl {
179 180
180#[derive(Debug)] 181#[derive(Debug)]
181pub(crate) struct AnalysisImpl { 182pub(crate) struct AnalysisImpl {
182 db: db::RootDatabase, 183 pub(crate) db: db::RootDatabase,
183} 184}
184 185
185impl AnalysisImpl { 186impl AnalysisImpl {
@@ -249,12 +250,11 @@ impl AnalysisImpl {
249 pub fn completions(&self, file_id: FileId, offset: TextUnit) -> Cancelable<Option<Vec<CompletionItem>>> { 250 pub fn completions(&self, file_id: FileId, offset: TextUnit) -> Cancelable<Option<Vec<CompletionItem>>> {
250 let mut res = Vec::new(); 251 let mut res = Vec::new();
251 let mut has_completions = false; 252 let mut has_completions = false;
252 let file = self.file_syntax(file_id); 253 if let Some(scope_based) = scope_completion(&self.db, file_id, offset) {
253 if let Some(scope_based) = ra_editor::scope_completion(&file, offset) {
254 res.extend(scope_based); 254 res.extend(scope_based);
255 has_completions = true; 255 has_completions = true;
256 } 256 }
257 if let Some(scope_based) = crate::completion::resolve_based_completion(&self.db, file_id, offset)? { 257 if let Some(scope_based) = resolve_based_completion(&self.db, file_id, offset)? {
258 res.extend(scope_based); 258 res.extend(scope_based);
259 has_completions = true; 259 has_completions = true;
260 } 260 }
diff --git a/crates/ra_analysis/src/lib.rs b/crates/ra_analysis/src/lib.rs
index a77c9a5fa..776010281 100644
--- a/crates/ra_analysis/src/lib.rs
+++ b/crates/ra_analysis/src/lib.rs
@@ -13,6 +13,7 @@ mod imp;
13mod symbol_index; 13mod symbol_index;
14mod completion; 14mod completion;
15mod syntax_ptr; 15mod syntax_ptr;
16mod mock_analysis;
16 17
17use std::{ 18use std::{
18 fmt, 19 fmt,
@@ -30,10 +31,12 @@ use crate::{
30 31
31pub use crate::{ 32pub use crate::{
32 descriptors::function::FnDescriptor, 33 descriptors::function::FnDescriptor,
33 input::{FileId, FileResolver, CrateGraph, CrateId} 34 completion::CompletionItem,
35 input::{FileId, FileResolver, CrateGraph, CrateId},
36 mock_analysis::MockAnalysis,
34}; 37};
35pub use ra_editor::{ 38pub use ra_editor::{
36 CompletionItem, FileSymbol, Fold, FoldKind, HighlightedRange, LineIndex, Runnable, 39 FileSymbol, Fold, FoldKind, HighlightedRange, LineIndex, Runnable,
37 RunnableKind, StructureNode, 40 RunnableKind, StructureNode,
38}; 41};
39 42
@@ -197,7 +200,7 @@ impl Query {
197 200
198#[derive(Debug)] 201#[derive(Debug)]
199pub struct Analysis { 202pub struct Analysis {
200 imp: AnalysisImpl, 203 pub(crate) imp: AnalysisImpl,
201} 204}
202 205
203impl Analysis { 206impl Analysis {
diff --git a/crates/ra_analysis/src/mock_analysis.rs b/crates/ra_analysis/src/mock_analysis.rs
new file mode 100644
index 000000000..1c1dbee7c
--- /dev/null
+++ b/crates/ra_analysis/src/mock_analysis.rs
@@ -0,0 +1,71 @@
1
2use std::sync::Arc;
3
4use relative_path::{RelativePath, RelativePathBuf};
5
6use crate::{
7 AnalysisChange, Analysis, AnalysisHost, FileId, FileResolver,
8};
9
10/// Mock analysis is used in test to bootstrap an AnalysisHost/Analysis
11/// from a set of in-memory files.
12#[derive(Debug, Default)]
13pub struct MockAnalysis {
14 files: Vec<(String, String)>,
15}
16
17impl MockAnalysis {
18 pub fn new() -> MockAnalysis {
19 MockAnalysis::default()
20 }
21 pub fn with_files(files: &[(&str, &str)]) -> MockAnalysis {
22 let files = files.iter()
23 .map(|it| (it.0.to_string(), it.1.to_string()))
24 .collect();
25 MockAnalysis { files }
26 }
27 pub fn analysis_host(self) -> AnalysisHost {
28 let mut host = AnalysisHost::new();
29 let mut file_map = Vec::new();
30 let mut change = AnalysisChange::new();
31 for (id, (path, contents)) in self.files.into_iter().enumerate() {
32 let file_id = FileId((id + 1) as u32);
33 assert!(path.starts_with('/'));
34 let path = RelativePathBuf::from_path(&path[1..]).unwrap();
35 change.add_file(file_id, contents);
36 file_map.push((file_id, path));
37 }
38 change.set_file_resolver(Arc::new(FileMap(file_map)));
39 host.apply_change(change);
40 host
41 }
42 pub fn analysis(self) -> Analysis {
43 self.analysis_host().analysis()
44 }
45}
46
47#[derive(Debug)]
48struct FileMap(Vec<(FileId, RelativePathBuf)>);
49
50impl FileMap {
51 fn iter<'a>(&'a self) -> impl Iterator<Item = (FileId, &'a RelativePath)> + 'a {
52 self.0
53 .iter()
54 .map(|(id, path)| (*id, path.as_relative_path()))
55 }
56
57 fn path(&self, id: FileId) -> &RelativePath {
58 self.iter().find(|&(it, _)| it == id).unwrap().1
59 }
60}
61
62impl FileResolver for FileMap {
63 fn file_stem(&self, id: FileId) -> String {
64 self.path(id).file_stem().unwrap().to_string()
65 }
66 fn resolve(&self, id: FileId, rel: &RelativePath) -> Option<FileId> {
67 let path = self.path(id).join(rel).normalize();
68 let id = self.iter().find(|&(_, p)| path == p)?.0;
69 Some(id)
70 }
71}
diff --git a/crates/ra_analysis/tests/tests.rs b/crates/ra_analysis/tests/tests.rs
index 806e1fb34..f5683aec5 100644
--- a/crates/ra_analysis/tests/tests.rs
+++ b/crates/ra_analysis/tests/tests.rs
@@ -5,62 +5,16 @@ extern crate relative_path;
5extern crate rustc_hash; 5extern crate rustc_hash;
6extern crate test_utils; 6extern crate test_utils;
7 7
8use std::{
9 sync::Arc,
10};
11
12use ra_syntax::TextRange; 8use ra_syntax::TextRange;
13use relative_path::{RelativePath, RelativePathBuf};
14use test_utils::{assert_eq_dbg, extract_offset}; 9use test_utils::{assert_eq_dbg, extract_offset};
15 10
16use ra_analysis::{ 11use ra_analysis::{
17 AnalysisChange, Analysis, AnalysisHost, CrateGraph, CrateId, FileId, FileResolver, FnDescriptor, 12 MockAnalysis,
13 AnalysisChange, Analysis, CrateGraph, CrateId, FileId, FnDescriptor,
18}; 14};
19 15
20#[derive(Debug)]
21struct FileMap(Vec<(FileId, RelativePathBuf)>);
22
23impl FileMap {
24 fn iter<'a>(&'a self) -> impl Iterator<Item = (FileId, &'a RelativePath)> + 'a {
25 self.0
26 .iter()
27 .map(|(id, path)| (*id, path.as_relative_path()))
28 }
29
30 fn path(&self, id: FileId) -> &RelativePath {
31 self.iter().find(|&(it, _)| it == id).unwrap().1
32 }
33}
34
35impl FileResolver for FileMap {
36 fn file_stem(&self, id: FileId) -> String {
37 self.path(id).file_stem().unwrap().to_string()
38 }
39 fn resolve(&self, id: FileId, rel: &RelativePath) -> Option<FileId> {
40 let path = self.path(id).join(rel).normalize();
41 let id = self.iter().find(|&(_, p)| path == p)?.0;
42 Some(id)
43 }
44}
45
46fn analysis_host(files: &[(&str, &str)]) -> AnalysisHost {
47 let mut host = AnalysisHost::new();
48 let mut file_map = Vec::new();
49 let mut change = AnalysisChange::new();
50 for (id, &(path, contents)) in files.iter().enumerate() {
51 let file_id = FileId((id + 1) as u32);
52 assert!(path.starts_with('/'));
53 let path = RelativePathBuf::from_path(&path[1..]).unwrap();
54 change.add_file(file_id, contents.to_string());
55 file_map.push((file_id, path));
56 }
57 change.set_file_resolver(Arc::new(FileMap(file_map)));
58 host.apply_change(change);
59 host
60}
61
62fn analysis(files: &[(&str, &str)]) -> Analysis { 16fn analysis(files: &[(&str, &str)]) -> Analysis {
63 analysis_host(files).analysis() 17 MockAnalysis::with_files(files).analysis()
64} 18}
65 19
66fn get_signature(text: &str) -> (FnDescriptor, Option<usize>) { 20fn get_signature(text: &str) -> (FnDescriptor, Option<usize>) {
@@ -125,7 +79,9 @@ fn test_resolve_parent_module() {
125 79
126#[test] 80#[test]
127fn test_resolve_crate_root() { 81fn test_resolve_crate_root() {
128 let mut host = analysis_host(&[("/lib.rs", "mod foo;"), ("/foo.rs", "")]); 82 let mut host = MockAnalysis::with_files(
83 &[("/lib.rs", "mod foo;"), ("/foo.rs", "")]
84 ).analysis_host();
129 let snap = host.analysis(); 85 let snap = host.analysis();
130 assert!(snap.crate_for(FileId(2)).unwrap().is_empty()); 86 assert!(snap.crate_for(FileId(2)).unwrap().is_empty());
131 87