1 //! `render` module provides utilities for rendering completion suggestions
2 //! into code pieces that will be presented to user.
5 pub(crate) mod function;
7 pub(crate) mod pattern;
8 pub(crate) mod type_alias;
9 pub(crate) mod variant;
10 pub(crate) mod union_literal;
11 pub(crate) mod literal;
13 use hir::{AsAssocItem, HasAttrs, HirDisplay, ScopeDef};
15 helpers::item_name, imports::import_assets::LocatedImport, RootDatabase, SnippetCap, SymbolKind,
17 use syntax::{AstNode, SmolStr, SyntaxKind, TextRange};
20 context::{DotAccess, PathCompletionCtx, PathKind, PatternContext},
21 item::{Builder, CompletionRelevanceTypeMatch},
24 literal::render_variant_lit,
25 macro_::{render_macro, render_macro_pat},
27 CompletionContext, CompletionItem, CompletionItemKind, CompletionRelevance,
29 /// Interface for data and methods required for items rendering.
30 #[derive(Debug, Clone)]
31 pub(crate) struct RenderContext<'a> {
32 completion: &'a CompletionContext<'a>,
33 is_private_editable: bool,
34 import_to_add: Option<LocatedImport>,
37 impl<'a> RenderContext<'a> {
38 pub(crate) fn new(completion: &'a CompletionContext<'a>) -> RenderContext<'a> {
39 RenderContext { completion, is_private_editable: false, import_to_add: None }
42 pub(crate) fn private_editable(mut self, private_editable: bool) -> Self {
43 self.is_private_editable = private_editable;
47 pub(crate) fn import_to_add(mut self, import_to_add: Option<LocatedImport>) -> Self {
48 self.import_to_add = import_to_add;
52 fn snippet_cap(&self) -> Option<SnippetCap> {
53 self.completion.config.snippet_cap
56 fn db(&self) -> &'a RootDatabase {
60 fn source_range(&self) -> TextRange {
61 self.completion.source_range()
64 fn completion_relevance(&self) -> CompletionRelevance {
66 is_private_editable: self.is_private_editable,
67 requires_import: self.import_to_add.is_some(),
72 fn is_immediately_after_macro_bang(&self) -> bool {
73 self.completion.token.kind() == SyntaxKind::BANG
78 .map_or(false, |it| it.kind() == SyntaxKind::MACRO_CALL)
81 fn is_deprecated(&self, def: impl HasAttrs) -> bool {
82 let attrs = def.attrs(self.db());
83 attrs.by_key("deprecated").exists()
86 fn is_deprecated_assoc_item(&self, as_assoc_item: impl AsAssocItem) -> bool {
88 let assoc = match as_assoc_item.as_assoc_item(db) {
93 let is_assoc_deprecated = match assoc {
94 hir::AssocItem::Function(it) => self.is_deprecated(it),
95 hir::AssocItem::Const(it) => self.is_deprecated(it),
96 hir::AssocItem::TypeAlias(it) => self.is_deprecated(it),
100 .containing_trait_or_trait_impl(db)
101 .map(|trait_| self.is_deprecated(trait_))
105 // FIXME: remove this
106 fn docs(&self, def: impl HasAttrs) -> Option<hir::Documentation> {
111 pub(crate) fn render_field(
112 ctx: RenderContext<'_>,
113 dot_access: &DotAccess,
114 receiver: Option<hir::Name>,
117 ) -> CompletionItem {
118 let is_deprecated = ctx.is_deprecated(field);
119 let name = field.name(ctx.db());
120 let (name, escaped_name) = (name.unescaped().to_smol_str(), name.to_smol_str());
121 let mut item = CompletionItem::new(
124 field_with_receiver(receiver.as_ref(), &name),
126 item.set_relevance(CompletionRelevance {
127 type_match: compute_type_match(ctx.completion, ty),
128 exact_name_match: compute_exact_name_match(ctx.completion, name.as_str()),
129 ..CompletionRelevance::default()
131 item.detail(ty.display(ctx.db()).to_string())
132 .set_documentation(field.docs(ctx.db()))
133 .set_deprecated(is_deprecated)
134 .lookup_by(name.clone());
135 item.insert_text(field_with_receiver(receiver.as_ref(), &escaped_name));
136 if let Some(receiver) = &dot_access.receiver {
137 if let Some(original) = ctx.completion.sema.original_ast_node(receiver.clone()) {
138 if let Some(ref_match) = compute_ref_match(ctx.completion, ty) {
139 item.ref_match(ref_match, original.syntax().text_range().start());
146 fn field_with_receiver(receiver: Option<&hir::Name>, field_name: &str) -> SmolStr {
148 .map_or_else(|| field_name.into(), |receiver| format!("{}.{}", receiver, field_name).into())
151 pub(crate) fn render_tuple_field(
152 ctx: RenderContext<'_>,
153 receiver: Option<hir::Name>,
156 ) -> CompletionItem {
157 let mut item = CompletionItem::new(
160 field_with_receiver(receiver.as_ref(), &field.to_string()),
162 item.detail(ty.display(ctx.db()).to_string()).lookup_by(field.to_string());
166 pub(crate) fn render_type_inference(
168 ctx: &CompletionContext<'_>,
169 ) -> CompletionItem {
171 CompletionItem::new(CompletionItemKind::InferredType, ctx.source_range(), ty_string);
172 builder.set_relevance(CompletionRelevance { is_definite: true, ..Default::default() });
176 pub(crate) fn render_path_resolution(
177 ctx: RenderContext<'_>,
178 path_ctx: &PathCompletionCtx,
179 local_name: hir::Name,
180 resolution: ScopeDef,
182 render_resolution_path(ctx, path_ctx, local_name, None, resolution)
185 pub(crate) fn render_pattern_resolution(
186 ctx: RenderContext<'_>,
187 pattern_ctx: &PatternContext,
188 local_name: hir::Name,
189 resolution: ScopeDef,
191 render_resolution_pat(ctx, pattern_ctx, local_name, None, resolution)
194 pub(crate) fn render_resolution_with_import(
195 ctx: RenderContext<'_>,
196 path_ctx: &PathCompletionCtx,
197 import_edit: LocatedImport,
198 ) -> Option<Builder> {
199 let resolution = ScopeDef::from(import_edit.original_item);
200 let local_name = scope_def_to_name(resolution, &ctx, &import_edit)?;
202 Some(render_resolution_path(ctx, path_ctx, local_name, Some(import_edit), resolution))
205 pub(crate) fn render_resolution_with_import_pat(
206 ctx: RenderContext<'_>,
207 pattern_ctx: &PatternContext,
208 import_edit: LocatedImport,
209 ) -> Option<Builder> {
210 let resolution = ScopeDef::from(import_edit.original_item);
211 let local_name = scope_def_to_name(resolution, &ctx, &import_edit)?;
212 Some(render_resolution_pat(ctx, pattern_ctx, local_name, Some(import_edit), resolution))
215 fn scope_def_to_name(
216 resolution: ScopeDef,
217 ctx: &RenderContext<'_>,
218 import_edit: &LocatedImport,
219 ) -> Option<hir::Name> {
220 Some(match resolution {
221 ScopeDef::ModuleDef(hir::ModuleDef::Function(f)) => f.name(ctx.completion.db),
222 ScopeDef::ModuleDef(hir::ModuleDef::Const(c)) => c.name(ctx.completion.db)?,
223 ScopeDef::ModuleDef(hir::ModuleDef::TypeAlias(t)) => t.name(ctx.completion.db),
224 _ => item_name(ctx.db(), import_edit.original_item)?,
228 fn render_resolution_pat(
229 ctx: RenderContext<'_>,
230 pattern_ctx: &PatternContext,
231 local_name: hir::Name,
232 import_to_add: Option<LocatedImport>,
233 resolution: ScopeDef,
235 let _p = profile::span("render_resolution");
236 use hir::ModuleDef::*;
239 ScopeDef::ModuleDef(Macro(mac)) => {
240 let ctx = ctx.import_to_add(import_to_add);
241 return render_macro_pat(ctx, pattern_ctx, local_name, mac);
246 render_resolution_simple_(ctx, &local_name, import_to_add, resolution)
249 fn render_resolution_path(
250 ctx: RenderContext<'_>,
251 path_ctx: &PathCompletionCtx,
252 local_name: hir::Name,
253 import_to_add: Option<LocatedImport>,
254 resolution: ScopeDef,
256 let _p = profile::span("render_resolution");
257 use hir::ModuleDef::*;
260 ScopeDef::ModuleDef(Macro(mac)) => {
261 let ctx = ctx.import_to_add(import_to_add);
262 return render_macro(ctx, path_ctx, local_name, mac);
264 ScopeDef::ModuleDef(Function(func)) => {
265 let ctx = ctx.import_to_add(import_to_add);
266 return render_fn(ctx, path_ctx, Some(local_name), func);
268 ScopeDef::ModuleDef(Variant(var)) => {
269 let ctx = ctx.clone().import_to_add(import_to_add.clone());
271 render_variant_lit(ctx, path_ctx, Some(local_name.clone()), var, None)
279 let completion = ctx.completion;
280 let cap = ctx.snippet_cap();
281 let db = completion.db;
282 let config = completion.config;
284 let name = local_name.to_smol_str();
285 let mut item = render_resolution_simple_(ctx, &local_name, import_to_add, resolution);
286 if local_name.is_escaped() {
287 item.insert_text(local_name.to_smol_str());
289 // Add `<>` for generic types
290 let type_path_no_ty_args = matches!(
292 PathCompletionCtx { kind: PathKind::Type { .. }, has_type_args: false, .. }
293 ) && config.callable.is_some();
294 if type_path_no_ty_args {
295 if let Some(cap) = cap {
296 let has_non_default_type_params = match resolution {
297 ScopeDef::ModuleDef(hir::ModuleDef::Adt(it)) => it.has_non_default_type_params(db),
298 ScopeDef::ModuleDef(hir::ModuleDef::TypeAlias(it)) => {
299 it.has_non_default_type_params(db)
304 if has_non_default_type_params {
305 cov_mark::hit!(inserts_angle_brackets_for_generics);
306 item.lookup_by(name.clone())
307 .label(SmolStr::from_iter([&name, "<…>"]))
309 .insert_snippet(cap, format!("{}<$0>", local_name));
313 if let ScopeDef::Local(local) = resolution {
314 let ty = local.ty(db);
315 if !ty.is_unknown() {
316 item.detail(ty.display(db).to_string());
319 item.set_relevance(CompletionRelevance {
320 type_match: compute_type_match(completion, &ty),
321 exact_name_match: compute_exact_name_match(completion, &name),
323 ..CompletionRelevance::default()
326 path_ref_match(completion, path_ctx, &ty, &mut item);
331 fn render_resolution_simple_(
332 ctx: RenderContext<'_>,
333 local_name: &hir::Name,
334 import_to_add: Option<LocatedImport>,
335 resolution: ScopeDef,
337 let _p = profile::span("render_resolution");
340 let ctx = ctx.import_to_add(import_to_add);
341 let kind = res_to_kind(resolution);
344 CompletionItem::new(kind, ctx.source_range(), local_name.unescaped().to_smol_str());
345 item.set_relevance(ctx.completion_relevance())
346 .set_documentation(scope_def_docs(db, resolution))
347 .set_deprecated(scope_def_is_deprecated(&ctx, resolution));
349 if let Some(import_to_add) = ctx.import_to_add {
350 item.add_import(import_to_add);
355 fn res_to_kind(resolution: ScopeDef) -> CompletionItemKind {
356 use hir::ModuleDef::*;
358 ScopeDef::Unknown => CompletionItemKind::UnresolvedReference,
359 ScopeDef::ModuleDef(Function(_)) => CompletionItemKind::SymbolKind(SymbolKind::Function),
360 ScopeDef::ModuleDef(Variant(_)) => CompletionItemKind::SymbolKind(SymbolKind::Variant),
361 ScopeDef::ModuleDef(Macro(_)) => CompletionItemKind::SymbolKind(SymbolKind::Macro),
362 ScopeDef::ModuleDef(Module(..)) => CompletionItemKind::SymbolKind(SymbolKind::Module),
363 ScopeDef::ModuleDef(Adt(adt)) => CompletionItemKind::SymbolKind(match adt {
364 hir::Adt::Struct(_) => SymbolKind::Struct,
365 hir::Adt::Union(_) => SymbolKind::Union,
366 hir::Adt::Enum(_) => SymbolKind::Enum,
368 ScopeDef::ModuleDef(Const(..)) => CompletionItemKind::SymbolKind(SymbolKind::Const),
369 ScopeDef::ModuleDef(Static(..)) => CompletionItemKind::SymbolKind(SymbolKind::Static),
370 ScopeDef::ModuleDef(Trait(..)) => CompletionItemKind::SymbolKind(SymbolKind::Trait),
371 ScopeDef::ModuleDef(TypeAlias(..)) => CompletionItemKind::SymbolKind(SymbolKind::TypeAlias),
372 ScopeDef::ModuleDef(BuiltinType(..)) => CompletionItemKind::BuiltinType,
373 ScopeDef::GenericParam(param) => CompletionItemKind::SymbolKind(match param {
374 hir::GenericParam::TypeParam(_) => SymbolKind::TypeParam,
375 hir::GenericParam::ConstParam(_) => SymbolKind::ConstParam,
376 hir::GenericParam::LifetimeParam(_) => SymbolKind::LifetimeParam,
378 ScopeDef::Local(..) => CompletionItemKind::SymbolKind(SymbolKind::Local),
379 ScopeDef::Label(..) => CompletionItemKind::SymbolKind(SymbolKind::Label),
380 ScopeDef::AdtSelfType(..) | ScopeDef::ImplSelfType(..) => {
381 CompletionItemKind::SymbolKind(SymbolKind::SelfParam)
386 fn scope_def_docs(db: &RootDatabase, resolution: ScopeDef) -> Option<hir::Documentation> {
387 use hir::ModuleDef::*;
389 ScopeDef::ModuleDef(Module(it)) => it.docs(db),
390 ScopeDef::ModuleDef(Adt(it)) => it.docs(db),
391 ScopeDef::ModuleDef(Variant(it)) => it.docs(db),
392 ScopeDef::ModuleDef(Const(it)) => it.docs(db),
393 ScopeDef::ModuleDef(Static(it)) => it.docs(db),
394 ScopeDef::ModuleDef(Trait(it)) => it.docs(db),
395 ScopeDef::ModuleDef(TypeAlias(it)) => it.docs(db),
400 fn scope_def_is_deprecated(ctx: &RenderContext<'_>, resolution: ScopeDef) -> bool {
402 ScopeDef::ModuleDef(it) => ctx.is_deprecated_assoc_item(it),
403 ScopeDef::GenericParam(it) => ctx.is_deprecated(it),
404 ScopeDef::AdtSelfType(it) => ctx.is_deprecated(it),
409 fn compute_type_match(
410 ctx: &CompletionContext<'_>,
411 completion_ty: &hir::Type,
412 ) -> Option<CompletionRelevanceTypeMatch> {
413 let expected_type = ctx.expected_type.as_ref()?;
415 // We don't ever consider unit type to be an exact type match, since
416 // nearly always this is not meaningful to the user.
417 if expected_type.is_unit() {
421 if completion_ty == expected_type {
422 Some(CompletionRelevanceTypeMatch::Exact)
423 } else if expected_type.could_unify_with(ctx.db, completion_ty) {
424 Some(CompletionRelevanceTypeMatch::CouldUnify)
430 fn compute_exact_name_match(ctx: &CompletionContext<'_>, completion_name: &str) -> bool {
431 ctx.expected_name.as_ref().map_or(false, |name| name.text() == completion_name)
434 fn compute_ref_match(
435 ctx: &CompletionContext<'_>,
436 completion_ty: &hir::Type,
437 ) -> Option<hir::Mutability> {
438 let expected_type = ctx.expected_type.as_ref()?;
439 if completion_ty != expected_type {
440 let expected_type_without_ref = expected_type.remove_ref()?;
441 if completion_ty.autoderef(ctx.db).any(|deref_ty| deref_ty == expected_type_without_ref) {
442 cov_mark::hit!(suggest_ref);
443 let mutability = if expected_type.is_mutable_reference() {
446 hir::Mutability::Shared
448 return Some(mutability);
455 completion: &CompletionContext<'_>,
456 path_ctx: &PathCompletionCtx,
460 if let Some(original_path) = &path_ctx.original_path {
461 // At least one char was typed by the user already, in that case look for the original path
462 if let Some(original_path) = completion.sema.original_ast_node(original_path.clone()) {
463 if let Some(ref_match) = compute_ref_match(completion, ty) {
464 item.ref_match(ref_match, original_path.syntax().text_range().start());
468 // completion requested on an empty identifier, there is no path here yet.
469 // FIXME: This might create inconsistent completions where we show a ref match in macro inputs
470 // as long as nothing was typed yet
471 if let Some(ref_match) = compute_ref_match(completion, ty) {
472 item.ref_match(ref_match, completion.position.offset);
481 use expect_test::{expect, Expect};
482 use ide_db::SymbolKind;
483 use itertools::Itertools;
486 item::CompletionRelevanceTypeMatch,
487 tests::{check_edit, do_completion, get_all_items, TEST_CONFIG},
488 CompletionItem, CompletionItemKind, CompletionRelevance, CompletionRelevancePostfixMatch,
492 fn check(ra_fixture: &str, kind: impl Into<CompletionItemKind>, expect: Expect) {
493 let actual = do_completion(ra_fixture, kind.into());
494 expect.assert_debug_eq(&actual);
498 fn check_kinds(ra_fixture: &str, kinds: &[CompletionItemKind], expect: Expect) {
500 kinds.iter().flat_map(|&kind| do_completion(ra_fixture, kind)).collect();
501 expect.assert_debug_eq(&actual);
505 fn check_relevance_for_kinds(ra_fixture: &str, kinds: &[CompletionItemKind], expect: Expect) {
506 let mut actual = get_all_items(TEST_CONFIG, ra_fixture, None);
507 actual.retain(|it| kinds.contains(&it.kind()));
508 actual.sort_by_key(|it| cmp::Reverse(it.relevance().score()));
509 check_relevance_(actual, expect);
513 fn check_relevance(ra_fixture: &str, expect: Expect) {
514 let mut actual = get_all_items(TEST_CONFIG, ra_fixture, None);
515 actual.retain(|it| it.kind() != CompletionItemKind::Snippet);
516 actual.retain(|it| it.kind() != CompletionItemKind::Keyword);
517 actual.retain(|it| it.kind() != CompletionItemKind::BuiltinType);
518 actual.sort_by_key(|it| cmp::Reverse(it.relevance().score()));
519 check_relevance_(actual, expect);
523 fn check_relevance_(actual: Vec<CompletionItem>, expect: Expect) {
527 let mut items = vec![];
529 let tag = it.kind().tag();
530 let relevance = display_relevance(it.relevance());
531 items.push(format!("{} {} {}\n", tag, it.label(), relevance));
533 if let Some((mutability, _offset, relevance)) = it.ref_match() {
534 let label = format!("&{}{}", mutability.as_keyword_for_ref(), it.label());
535 let relevance = display_relevance(relevance);
537 items.push(format!("{} {} {}\n", tag, label, relevance));
542 .collect::<String>();
544 expect.assert_eq(&actual);
546 fn display_relevance(relevance: CompletionRelevance) -> String {
547 let relevance_factors = vec![
548 (relevance.type_match == Some(CompletionRelevanceTypeMatch::Exact), "type"),
550 relevance.type_match == Some(CompletionRelevanceTypeMatch::CouldUnify),
553 (relevance.exact_name_match, "name"),
554 (relevance.is_local, "local"),
556 relevance.postfix_match == Some(CompletionRelevancePostfixMatch::Exact),
559 (relevance.is_op_method, "op_method"),
560 (relevance.requires_import, "requires_import"),
563 .filter_map(|(cond, desc)| if cond { Some(desc) } else { None })
566 format!("[{}]", relevance_factors)
571 fn enum_detail_includes_record_fields() {
574 enum Foo { Foo { x: i32, y: i32 } }
576 fn main() { Foo::Fo$0 }
583 source_range: 54..56,
585 insert: "Foo { x: ${1:()}, y: ${2:()} }$0",
590 detail: "Foo { x: i32, y: i32 }",
598 fn enum_detail_includes_tuple_fields() {
601 enum Foo { Foo (i32, i32) }
603 fn main() { Foo::Fo$0 }
610 source_range: 46..48,
612 insert: "Foo(${1:()}, ${2:()})$0",
617 detail: "Foo(i32, i32)",
625 fn fn_detail_includes_args_and_return_type() {
628 fn foo<T>(a: u32, b: u32, t: T) -> (u32, T) { (a, t) }
632 SymbolKind::Function,
637 source_range: 68..70,
639 insert: "foo(${1:a}, ${2:b}, ${3:t})$0",
644 detail: "fn(u32, u32, T) -> (u32, T)",
645 trigger_call_info: true,
649 source_range: 68..70,
664 fn enum_detail_just_name_for_unit() {
669 fn main() { Foo::Fo$0 }
676 source_range: 35..37,
690 fn lookup_enums_by_two_qualifiers() {
694 pub enum Spam { Foo, Bar(i32) }
696 fn main() { let _: m::Spam = S$0 }
699 CompletionItemKind::SymbolKind(SymbolKind::Function),
700 CompletionItemKind::SymbolKind(SymbolKind::Module),
701 CompletionItemKind::SymbolKind(SymbolKind::Variant),
707 source_range: 75..76,
718 source_range: 75..76,
726 label: "m::Spam::Bar(…)",
727 source_range: 75..76,
729 insert: "m::Spam::Bar(${1:()})$0",
733 lookup: "Spam::Bar()",
734 detail: "m::Spam::Bar(i32)",
735 relevance: CompletionRelevance {
736 exact_name_match: false,
741 is_item_from_trait: false,
742 is_name_already_imported: false,
743 requires_import: false,
745 is_private_editable: false,
751 label: "m::Spam::Foo",
752 source_range: 75..76,
754 insert: "m::Spam::Foo$0",
759 detail: "m::Spam::Foo",
760 relevance: CompletionRelevance {
761 exact_name_match: false,
766 is_item_from_trait: false,
767 is_name_already_imported: false,
768 requires_import: false,
770 is_private_editable: false,
781 fn sets_deprecated_flag_in_items() {
785 fn something_deprecated() {}
789 SymbolKind::Function,
794 source_range: 56..59,
804 label: "something_deprecated()",
805 source_range: 56..59,
807 insert: "something_deprecated()$0",
811 lookup: "something_deprecated",
821 struct A { #[deprecated] the_field: u32 }
822 fn foo() { A { the$0 } }
829 source_range: 57..60,
837 relevance: CompletionRelevance {
838 exact_name_match: false,
843 is_item_from_trait: false,
844 is_name_already_imported: false,
845 requires_import: false,
847 is_private_editable: false,
867 fn bar(self) { self.$0 }
869 &[CompletionItemKind::Method, CompletionItemKind::SymbolKind(SymbolKind::Field)],
874 source_range: 94..94,
880 documentation: Documentation(
886 source_range: 94..94,
893 documentation: Documentation(
916 CompletionItemKind::SymbolKind(SymbolKind::Module),
917 CompletionItemKind::SymbolKind(SymbolKind::Variant),
918 CompletionItemKind::SymbolKind(SymbolKind::Enum),
924 source_range: 10..12,
930 documentation: Documentation(
936 source_range: 10..12,
943 documentation: Documentation(
949 source_range: 10..12,
955 documentation: Documentation(
965 fn dont_render_attrs() {
971 fn the_method(&self) { }
973 fn foo(s: S) { s.$0 }
975 CompletionItemKind::Method,
979 label: "the_method()",
980 source_range: 81..81,
982 insert: "the_method()$0",
984 lookup: "the_method",
993 fn no_call_parens_if_fn_ptr_needed() {
994 cov_mark::check!(no_call_parens_if_fn_ptr_needed);
998 fn foo(foo: u8, bar: u8) {}
999 struct ManualVtable { f: fn(u8, u8) }
1001 fn main() -> ManualVtable {
1002 ManualVtable { f: f$0 }
1006 fn foo(foo: u8, bar: u8) {}
1007 struct ManualVtable { f: fn(u8, u8) }
1009 fn main() -> ManualVtable {
1010 ManualVtable { f: foo }
1017 struct RawIdentTable { r#type: u32 }
1019 fn main() -> RawIdentTable {
1020 RawIdentTable { t$0: 42 }
1024 struct RawIdentTable { r#type: u32 }
1026 fn main() -> RawIdentTable {
1027 RawIdentTable { r#type: 42 }
1034 fn no_parens_in_use_item() {
1038 mod m { pub fn foo() {} }
1042 mod m { pub fn foo() {} }
1049 fn no_parens_in_call() {
1054 fn main() { f$0(); }
1058 fn main() { foo(); }
1065 impl Foo { fn foo(&self){} }
1066 fn f(foo: &Foo) { foo.f$0(); }
1070 impl Foo { fn foo(&self){} }
1071 fn f(foo: &Foo) { foo.foo(); }
1077 fn inserts_angle_brackets_for_generics() {
1078 cov_mark::check!(inserts_angle_brackets_for_generics);
1104 struct Vec<T = i128> {}
1108 struct Vec<T = i128> {}
1116 fn foo(xs: Ve$0<i128>)
1120 fn foo(xs: Vec<i128>)
1126 fn active_param_relevance() {
1129 struct S { foo: i64, bar: u32, baz: u32 }
1130 fn test(bar: u32) { }
1131 fn foo(s: S) { test(s.$0) }
1142 fn record_field_relevances() {
1145 struct A { foo: i64, bar: u32, baz: u32 }
1146 struct B { x: (), y: f32, bar: u32 }
1147 fn foo(a: A) { B { bar: a.$0 }; }
1158 fn record_field_and_call_relevances() {
1161 struct A { foo: i64, bar: u32, baz: u32 }
1162 struct B { x: (), y: f32, bar: u32 }
1164 fn foo(a: A) { B { bar: f(a.$0) }; }
1174 struct A { foo: i64, bar: u32, baz: u32 }
1175 struct B { x: (), y: f32, bar: u32 }
1177 fn foo(a: A) { f(B { bar: a.$0 }); }
1188 fn prioritize_exact_ref_match() {
1191 struct WorldSnapshot { _f: () };
1192 fn go(world: &WorldSnapshot) { go(w$0) }
1195 lc world [type+name+local]
1196 st WorldSnapshot {…} []
1197 st &WorldSnapshot {…} [type]
1205 fn too_many_arguments() {
1206 cov_mark::check!(too_many_arguments);
1210 fn f(foo: &Foo) { f(foo, w$0) }
1221 fn score_fn_type_and_name_match() {
1224 struct A { bar: u8 }
1225 fn baz() -> u8 { 0 }
1226 fn bar() -> u8 { 0 }
1227 fn f() { A { bar: b$0 }; }
1230 fn bar() [type+name]
1239 fn score_method_type_and_name_match() {
1245 fn aaa(&self) -> u32 { 0 }
1246 fn bbb(&self) -> u32 { 0 }
1247 fn ccc(&self) -> u64 { 0 }
1254 me aaa() [type+name]
1262 fn score_method_name_match_only() {
1268 fn aaa(&self) -> u64 { 0 }
1281 fn suggest_ref_mut() {
1282 cov_mark::check!(suggest_ref);
1286 fn foo(s: &mut S) {}
1294 lc &mut s [type+name+local]
1305 fn foo(s: &mut S) {}
1312 lc s [type+name+local]
1322 fn foo(s: &mut S) {}
1329 lc ssss [type+local]
1339 fn suggest_deref() {
1346 impl core::ops::Deref for T {
1349 fn deref(&self) -> &Self::Target {
1379 fn suggest_deref_mut() {
1382 //- minicore: deref_mut
1386 impl core::ops::Deref for T {
1389 fn deref(&self) -> &Self::Target {
1394 impl core::ops::DerefMut for T {
1395 fn deref_mut(&mut self) -> &mut Self::Target {
1400 fn foo(s: &mut S) {}
1412 lc &mut t [type+local]
1485 fn suggest_deref_fn_ret() {
1492 impl core::ops::Deref for T {
1495 fn deref(&self) -> &Self::Target {
1522 fn op_function_relevances() {
1527 fn sub(self, other: Self) -> Self { self }
1530 fn foo(a: u32) { a.$0 }
1533 me sub(…) (as Sub) [op_method]
1543 pub trait PartialEq<Rhs: ?Sized = Self> {
1544 fn eq(&self, other: &Rhs) -> bool;
1545 fn ne(&self, other: &Rhs) -> bool;
1548 impl PartialEq for Foo {}
1555 me eq(…) (as PartialEq) [op_method]
1556 me ne(…) (as PartialEq) [op_method]
1562 fn struct_field_method_ref() {
1565 struct Foo { bar: u32 }
1566 impl Foo { fn baz(&self) -> u32 { 0 } }
1568 fn foo(f: Foo) { let _: &u32 = f.b$0 }
1570 &[CompletionItemKind::Method, CompletionItemKind::SymbolKind(SymbolKind::Field)],
1575 source_range: 98..99,
1580 detail: "fn(&self) -> u32",
1585 source_range: 98..99,
1600 fn qualified_path_ref() {
1616 &[CompletionItemKind::SymbolKind(SymbolKind::Function)],
1621 source_range: 95..95,
1628 detail: "fn() -> S",
1640 enum Foo<T> { A(T), B }
1641 // bar() should not be an exact type match
1642 // because the generic parameters are different
1643 fn bar() -> Foo<u8> { Foo::B }
1644 // FIXME baz() should be an exact type match
1645 // because the types could unify, but it currently
1646 // is not. This is due to the T here being
1647 // TyKind::Placeholder rather than TyKind::Missing.
1648 fn baz<T>() -> Foo<T> { Foo::B }
1650 let foo: Foo<u32> = Foo::B;
1651 let _: Foo<u32> = f$0;
1656 ev Foo::A(…) [type_could_unify]
1657 ev Foo::B [type_could_unify]
1667 fn postfix_exact_match_is_high_priority() {
1668 cov_mark::check!(postfix_exact_match_is_high_priority);
1669 check_relevance_for_kinds(
1674 fn not(self) -> Self::Output;
1679 fn not(self) -> bool { if self { false } else { true }}
1684 let _: bool = (9 > 2).not$0;
1687 &[CompletionItemKind::Snippet, CompletionItemKind::Method],
1690 me not() (use ops::Not) [type_could_unify+requires_import]
1705 fn postfix_inexact_match_is_low_priority() {
1706 cov_mark::check!(postfix_inexact_match_is_low_priority);
1707 check_relevance_for_kinds(
1717 &[CompletionItemKind::Snippet, CompletionItemKind::Method],
1734 fn flyimport_reduced_relevance() {
1739 pub trait BufRead {}
1740 pub struct BufReader;
1741 pub struct BufWriter;
1754 tt BufRead (use std::io::BufRead) [requires_import]
1755 st BufReader (use std::io::BufReader) [requires_import]
1756 st BufWriter (use std::io::BufWriter) [requires_import]
1762 fn completes_struct_with_raw_identifier() {
1766 mod m { pub struct r#type {} }
1768 let r#type = m::t$0;
1772 mod m { pub struct r#type {} }
1774 let r#type = m::r#type;
1781 fn completes_fn_with_raw_identifier() {
1785 mod m { pub fn r#type {} }
1791 mod m { pub fn r#type {} }
1800 fn completes_macro_with_raw_identifier() {
1804 macro_rules! r#let { () => {} }
1810 macro_rules! r#let { () => {} }
1819 fn completes_variant_with_raw_identifier() {
1838 fn completes_field_with_raw_identifier() {
1843 pub struct r#struct {
1849 let a = r#type::r#struct {};
1855 pub struct r#struct {
1861 let a = r#type::r#struct {};
1869 fn completes_const_with_raw_identifier() {
1874 impl r#struct { pub const r#type: u8 = 1; }
1881 impl r#struct { pub const r#type: u8 = 1; }
1890 fn completes_type_alias_with_raw_identifier() {
1895 trait r#trait { type r#type; }
1896 impl r#trait for r#struct { type t$0 }
1900 trait r#trait { type r#type; }
1901 impl r#trait for r#struct { type r#type = $0; }
1907 fn field_access_includes_self() {