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::{SmolStr, SyntaxKind, TextRange};
20 context::{PathCompletionCtx, PathKind},
21 item::{Builder, CompletionRelevanceTypeMatch},
22 render::{function::render_fn, literal::render_variant_lit, macro_::render_macro},
23 CompletionContext, CompletionItem, CompletionItemKind, CompletionRelevance,
25 /// Interface for data and methods required for items rendering.
26 #[derive(Debug, Clone)]
27 pub(crate) struct RenderContext<'a> {
28 completion: &'a CompletionContext<'a>,
29 is_private_editable: bool,
30 import_to_add: Option<LocatedImport>,
33 impl<'a> RenderContext<'a> {
34 pub(crate) fn new(completion: &'a CompletionContext<'a>) -> RenderContext<'a> {
35 RenderContext { completion, is_private_editable: false, import_to_add: None }
38 pub(crate) fn private_editable(mut self, private_editable: bool) -> Self {
39 self.is_private_editable = private_editable;
43 pub(crate) fn import_to_add(mut self, import_to_add: Option<LocatedImport>) -> Self {
44 self.import_to_add = import_to_add;
48 fn snippet_cap(&self) -> Option<SnippetCap> {
49 self.completion.config.snippet_cap
52 fn db(&self) -> &'a RootDatabase {
56 fn source_range(&self) -> TextRange {
57 self.completion.source_range()
60 fn completion_relevance(&self) -> CompletionRelevance {
62 is_private_editable: self.is_private_editable,
63 requires_import: self.import_to_add.is_some(),
68 fn is_immediately_after_macro_bang(&self) -> bool {
69 self.completion.token.kind() == SyntaxKind::BANG
74 .map_or(false, |it| it.kind() == SyntaxKind::MACRO_CALL)
77 fn is_deprecated(&self, def: impl HasAttrs) -> bool {
78 let attrs = def.attrs(self.db());
79 attrs.by_key("deprecated").exists()
82 fn is_deprecated_assoc_item(&self, as_assoc_item: impl AsAssocItem) -> bool {
84 let assoc = match as_assoc_item.as_assoc_item(db) {
89 let is_assoc_deprecated = match assoc {
90 hir::AssocItem::Function(it) => self.is_deprecated(it),
91 hir::AssocItem::Const(it) => self.is_deprecated(it),
92 hir::AssocItem::TypeAlias(it) => self.is_deprecated(it),
96 .containing_trait_or_trait_impl(db)
97 .map(|trait_| self.is_deprecated(trait_))
101 // FIXME: remove this
102 fn docs(&self, def: impl HasAttrs) -> Option<hir::Documentation> {
107 pub(crate) fn render_field(
108 ctx: RenderContext<'_>,
109 receiver: Option<hir::Name>,
112 ) -> CompletionItem {
113 let is_deprecated = ctx.is_deprecated(field);
114 let name = field.name(ctx.db()).to_smol_str();
115 let mut item = CompletionItem::new(
118 receiver.map_or_else(|| name.clone(), |receiver| format!("{}.{}", receiver, name).into()),
120 item.set_relevance(CompletionRelevance {
121 type_match: compute_type_match(ctx.completion, ty),
122 exact_name_match: compute_exact_name_match(ctx.completion, name.as_str()),
123 ..CompletionRelevance::default()
125 item.detail(ty.display(ctx.db()).to_string())
126 .set_documentation(field.docs(ctx.db()))
127 .set_deprecated(is_deprecated)
128 .lookup_by(name.clone());
129 let is_keyword = SyntaxKind::from_keyword(name.as_str()).is_some();
130 if is_keyword && !matches!(name.as_str(), "self" | "crate" | "super" | "Self") {
131 item.insert_text(format!("r#{}", name));
133 if let Some(_ref_match) = compute_ref_match(ctx.completion, ty) {
135 // For now we don't properly calculate the edits for ref match
136 // completions on struct fields, so we've disabled them. See #8058.
141 pub(crate) fn render_tuple_field(
142 ctx: RenderContext<'_>,
143 receiver: Option<hir::Name>,
146 ) -> CompletionItem {
147 let mut item = CompletionItem::new(
150 receiver.map_or_else(|| field.to_string(), |receiver| format!("{}.{}", receiver, field)),
152 item.detail(ty.display(ctx.db()).to_string()).lookup_by(field.to_string());
156 pub(crate) fn render_path_resolution(
157 ctx: RenderContext<'_>,
158 path_ctx: &PathCompletionCtx,
159 local_name: hir::Name,
160 resolution: ScopeDef,
162 render_resolution_(ctx, path_ctx, local_name, None, resolution)
165 pub(crate) fn render_resolution_simple(
166 ctx: RenderContext<'_>,
167 local_name: hir::Name,
168 resolution: ScopeDef,
170 render_resolution_simple_(ctx, local_name, None, resolution)
173 pub(crate) fn render_resolution_with_import(
174 ctx: RenderContext<'_>,
175 path_ctx: &PathCompletionCtx,
176 import_edit: LocatedImport,
177 ) -> Option<Builder> {
178 let resolution = ScopeDef::from(import_edit.original_item);
179 let local_name = match resolution {
180 ScopeDef::ModuleDef(hir::ModuleDef::Function(f)) => f.name(ctx.completion.db),
181 ScopeDef::ModuleDef(hir::ModuleDef::Const(c)) => c.name(ctx.completion.db)?,
182 ScopeDef::ModuleDef(hir::ModuleDef::TypeAlias(t)) => t.name(ctx.completion.db),
183 _ => item_name(ctx.db(), import_edit.original_item)?,
185 Some(render_resolution_(ctx, path_ctx, local_name, Some(import_edit), resolution))
188 pub(crate) fn render_type_inference(ty_string: String, ctx: &CompletionContext) -> CompletionItem {
190 CompletionItem::new(CompletionItemKind::InferredType, ctx.source_range(), ty_string);
191 builder.set_relevance(CompletionRelevance { is_definite: true, ..Default::default() });
195 fn render_resolution_(
196 ctx: RenderContext<'_>,
197 path_ctx: &PathCompletionCtx,
198 local_name: hir::Name,
199 import_to_add: Option<LocatedImport>,
200 resolution: ScopeDef,
202 let _p = profile::span("render_resolution");
203 use hir::ModuleDef::*;
206 ScopeDef::ModuleDef(Macro(mac)) => {
207 let ctx = ctx.import_to_add(import_to_add);
208 return render_macro(ctx, path_ctx, local_name, mac);
210 ScopeDef::ModuleDef(Function(func)) => {
211 let ctx = ctx.import_to_add(import_to_add);
212 return render_fn(ctx, path_ctx, Some(local_name), func);
214 ScopeDef::ModuleDef(Variant(var)) => {
215 let ctx = ctx.clone().import_to_add(import_to_add.clone());
217 render_variant_lit(ctx, path_ctx, Some(local_name.clone()), var, None)
224 render_resolution_simple_type(ctx, path_ctx, local_name, import_to_add, resolution)
227 fn render_resolution_simple_type(
228 ctx: RenderContext<'_>,
229 path_ctx: &PathCompletionCtx,
230 local_name: hir::Name,
231 import_to_add: Option<LocatedImport>,
232 resolution: ScopeDef,
234 let cap = ctx.snippet_cap();
235 let db = ctx.completion.db;
236 let config = ctx.completion.config;
237 let name = local_name.to_smol_str();
238 let mut item = render_resolution_simple_(ctx, local_name, import_to_add, resolution);
239 // Add `<>` for generic types
240 let type_path_no_ty_args = matches!(
242 PathCompletionCtx { kind: PathKind::Type { .. }, has_type_args: false, .. }
243 ) && config.callable.is_some();
244 if type_path_no_ty_args {
245 if let Some(cap) = cap {
246 let has_non_default_type_params = match resolution {
247 ScopeDef::ModuleDef(hir::ModuleDef::Adt(it)) => it.has_non_default_type_params(db),
248 ScopeDef::ModuleDef(hir::ModuleDef::TypeAlias(it)) => {
249 it.has_non_default_type_params(db)
253 if has_non_default_type_params {
254 cov_mark::hit!(inserts_angle_brackets_for_generics);
255 item.lookup_by(name.clone())
256 .label(SmolStr::from_iter([&name, "<…>"]))
258 .insert_snippet(cap, format!("{}<$0>", name));
265 fn render_resolution_simple_(
266 ctx: RenderContext<'_>,
267 local_name: hir::Name,
268 import_to_add: Option<LocatedImport>,
269 resolution: ScopeDef,
271 let _p = profile::span("render_resolution");
272 use hir::ModuleDef::*;
275 let ctx = ctx.import_to_add(import_to_add);
276 let kind = match resolution {
277 ScopeDef::Unknown => CompletionItemKind::UnresolvedReference,
278 ScopeDef::ModuleDef(Function(_)) => CompletionItemKind::SymbolKind(SymbolKind::Function),
279 ScopeDef::ModuleDef(Variant(_)) => CompletionItemKind::SymbolKind(SymbolKind::Variant),
280 ScopeDef::ModuleDef(Macro(_)) => CompletionItemKind::SymbolKind(SymbolKind::Macro),
281 ScopeDef::ModuleDef(Module(..)) => CompletionItemKind::SymbolKind(SymbolKind::Module),
282 ScopeDef::ModuleDef(Adt(adt)) => CompletionItemKind::SymbolKind(match adt {
283 hir::Adt::Struct(_) => SymbolKind::Struct,
284 hir::Adt::Union(_) => SymbolKind::Union,
285 hir::Adt::Enum(_) => SymbolKind::Enum,
287 ScopeDef::ModuleDef(Const(..)) => CompletionItemKind::SymbolKind(SymbolKind::Const),
288 ScopeDef::ModuleDef(Static(..)) => CompletionItemKind::SymbolKind(SymbolKind::Static),
289 ScopeDef::ModuleDef(Trait(..)) => CompletionItemKind::SymbolKind(SymbolKind::Trait),
290 ScopeDef::ModuleDef(TypeAlias(..)) => CompletionItemKind::SymbolKind(SymbolKind::TypeAlias),
291 ScopeDef::ModuleDef(BuiltinType(..)) => CompletionItemKind::BuiltinType,
292 ScopeDef::GenericParam(param) => CompletionItemKind::SymbolKind(match param {
293 hir::GenericParam::TypeParam(_) => SymbolKind::TypeParam,
294 hir::GenericParam::ConstParam(_) => SymbolKind::ConstParam,
295 hir::GenericParam::LifetimeParam(_) => SymbolKind::LifetimeParam,
297 ScopeDef::Local(..) => CompletionItemKind::SymbolKind(SymbolKind::Local),
298 ScopeDef::Label(..) => CompletionItemKind::SymbolKind(SymbolKind::Label),
299 ScopeDef::AdtSelfType(..) | ScopeDef::ImplSelfType(..) => {
300 CompletionItemKind::SymbolKind(SymbolKind::SelfParam)
304 let local_name = local_name.to_smol_str();
305 let mut item = CompletionItem::new(kind, ctx.source_range(), local_name.clone());
306 item.set_relevance(ctx.completion_relevance());
307 if let ScopeDef::Local(local) = resolution {
308 let ty = local.ty(db);
309 if !ty.is_unknown() {
310 item.detail(ty.display(db).to_string());
313 item.set_relevance(CompletionRelevance {
314 type_match: compute_type_match(ctx.completion, &ty),
315 exact_name_match: compute_exact_name_match(ctx.completion, &local_name),
317 ..CompletionRelevance::default()
320 if let Some(ref_match) = compute_ref_match(ctx.completion, &ty) {
321 item.ref_match(ref_match);
325 item.set_documentation(scope_def_docs(db, resolution))
326 .set_deprecated(scope_def_is_deprecated(&ctx, resolution));
328 if let Some(import_to_add) = ctx.import_to_add {
329 item.add_import(import_to_add);
334 fn scope_def_docs(db: &RootDatabase, resolution: ScopeDef) -> Option<hir::Documentation> {
335 use hir::ModuleDef::*;
337 ScopeDef::ModuleDef(Module(it)) => it.docs(db),
338 ScopeDef::ModuleDef(Adt(it)) => it.docs(db),
339 ScopeDef::ModuleDef(Variant(it)) => it.docs(db),
340 ScopeDef::ModuleDef(Const(it)) => it.docs(db),
341 ScopeDef::ModuleDef(Static(it)) => it.docs(db),
342 ScopeDef::ModuleDef(Trait(it)) => it.docs(db),
343 ScopeDef::ModuleDef(TypeAlias(it)) => it.docs(db),
348 fn scope_def_is_deprecated(ctx: &RenderContext<'_>, resolution: ScopeDef) -> bool {
350 ScopeDef::ModuleDef(it) => ctx.is_deprecated_assoc_item(it),
351 ScopeDef::GenericParam(it) => ctx.is_deprecated(it),
352 ScopeDef::AdtSelfType(it) => ctx.is_deprecated(it),
357 fn compute_type_match(
358 ctx: &CompletionContext,
359 completion_ty: &hir::Type,
360 ) -> Option<CompletionRelevanceTypeMatch> {
361 let expected_type = ctx.expected_type.as_ref()?;
363 // We don't ever consider unit type to be an exact type match, since
364 // nearly always this is not meaningful to the user.
365 if expected_type.is_unit() {
369 if completion_ty == expected_type {
370 Some(CompletionRelevanceTypeMatch::Exact)
371 } else if expected_type.could_unify_with(ctx.db, completion_ty) {
372 Some(CompletionRelevanceTypeMatch::CouldUnify)
378 fn compute_exact_name_match(ctx: &CompletionContext, completion_name: &str) -> bool {
379 ctx.expected_name.as_ref().map_or(false, |name| name.text() == completion_name)
382 fn compute_ref_match(
383 ctx: &CompletionContext,
384 completion_ty: &hir::Type,
385 ) -> Option<hir::Mutability> {
386 let expected_type = ctx.expected_type.as_ref()?;
387 if completion_ty != expected_type {
388 let expected_type_without_ref = expected_type.remove_ref()?;
389 if completion_ty.autoderef(ctx.db).any(|deref_ty| deref_ty == expected_type_without_ref) {
390 cov_mark::hit!(suggest_ref);
391 let mutability = if expected_type.is_mutable_reference() {
394 hir::Mutability::Shared
396 return Some(mutability);
406 use expect_test::{expect, Expect};
407 use ide_db::SymbolKind;
408 use itertools::Itertools;
411 item::CompletionRelevanceTypeMatch,
412 tests::{check_edit, do_completion, get_all_items, TEST_CONFIG},
413 CompletionItem, CompletionItemKind, CompletionRelevance, CompletionRelevancePostfixMatch,
417 fn check(ra_fixture: &str, kind: impl Into<CompletionItemKind>, expect: Expect) {
418 let actual = do_completion(ra_fixture, kind.into());
419 expect.assert_debug_eq(&actual);
423 fn check_kinds(ra_fixture: &str, kinds: &[CompletionItemKind], expect: Expect) {
425 kinds.iter().flat_map(|&kind| do_completion(ra_fixture, kind)).collect();
426 expect.assert_debug_eq(&actual);
430 fn check_relevance_for_kinds(ra_fixture: &str, kinds: &[CompletionItemKind], expect: Expect) {
431 let mut actual = get_all_items(TEST_CONFIG, ra_fixture, None);
432 actual.retain(|it| kinds.contains(&it.kind()));
433 actual.sort_by_key(|it| cmp::Reverse(it.relevance().score()));
434 check_relevance_(actual, expect);
438 fn check_relevance(ra_fixture: &str, expect: Expect) {
439 let mut actual = get_all_items(TEST_CONFIG, ra_fixture, None);
440 actual.retain(|it| it.kind() != CompletionItemKind::Snippet);
441 actual.retain(|it| it.kind() != CompletionItemKind::Keyword);
442 actual.retain(|it| it.kind() != CompletionItemKind::BuiltinType);
443 actual.sort_by_key(|it| cmp::Reverse(it.relevance().score()));
444 check_relevance_(actual, expect);
448 fn check_relevance_(actual: Vec<CompletionItem>, expect: Expect) {
452 let mut items = vec![];
454 let tag = it.kind().tag();
455 let relevance = display_relevance(it.relevance());
456 items.push(format!("{} {} {}\n", tag, it.label(), relevance));
458 if let Some((mutability, relevance)) = it.ref_match() {
459 let label = format!("&{}{}", mutability.as_keyword_for_ref(), it.label());
460 let relevance = display_relevance(relevance);
462 items.push(format!("{} {} {}\n", tag, label, relevance));
467 .collect::<String>();
469 expect.assert_eq(&actual);
471 fn display_relevance(relevance: CompletionRelevance) -> String {
472 let relevance_factors = vec![
473 (relevance.type_match == Some(CompletionRelevanceTypeMatch::Exact), "type"),
475 relevance.type_match == Some(CompletionRelevanceTypeMatch::CouldUnify),
478 (relevance.exact_name_match, "name"),
479 (relevance.is_local, "local"),
481 relevance.postfix_match == Some(CompletionRelevancePostfixMatch::Exact),
484 (relevance.is_op_method, "op_method"),
485 (relevance.requires_import, "requires_import"),
488 .filter_map(|(cond, desc)| if cond { Some(desc) } else { None })
491 format!("[{}]", relevance_factors)
496 fn enum_detail_includes_record_fields() {
499 enum Foo { Foo { x: i32, y: i32 } }
501 fn main() { Foo::Fo$0 }
508 source_range: 54..56,
510 insert: "Foo { x: ${1:()}, y: ${2:()} }$0",
514 detail: "Foo { x: i32, y: i32 }",
522 fn enum_detail_includes_tuple_fields() {
525 enum Foo { Foo (i32, i32) }
527 fn main() { Foo::Fo$0 }
534 source_range: 46..48,
536 insert: "Foo(${1:()}, ${2:()})$0",
540 detail: "Foo(i32, i32)",
548 fn fn_detail_includes_args_and_return_type() {
551 fn foo<T>(a: u32, b: u32, t: T) -> (u32, T) { (a, t) }
555 SymbolKind::Function,
560 source_range: 68..70,
562 insert: "foo(${1:a}, ${2:b}, ${3:t})$0",
567 detail: "fn(u32, u32, T) -> (u32, T)",
568 trigger_call_info: true,
572 source_range: 68..70,
587 fn enum_detail_just_name_for_unit() {
592 fn main() { Foo::Fo$0 }
599 source_range: 35..37,
613 fn lookup_enums_by_two_qualifiers() {
617 pub enum Spam { Foo, Bar(i32) }
619 fn main() { let _: m::Spam = S$0 }
622 CompletionItemKind::SymbolKind(SymbolKind::Function),
623 CompletionItemKind::SymbolKind(SymbolKind::Module),
624 CompletionItemKind::SymbolKind(SymbolKind::Variant),
630 source_range: 75..76,
641 source_range: 75..76,
649 label: "m::Spam::Bar(…)",
650 source_range: 75..76,
652 insert: "m::Spam::Bar(${1:()})$0",
656 lookup: "Spam::Bar(…)",
657 detail: "m::Spam::Bar(i32)",
658 relevance: CompletionRelevance {
659 exact_name_match: false,
664 is_item_from_trait: false,
665 is_name_already_imported: false,
666 requires_import: false,
668 is_private_editable: false,
674 label: "m::Spam::Foo",
675 source_range: 75..76,
677 insert: "m::Spam::Foo$0",
682 detail: "m::Spam::Foo",
683 relevance: CompletionRelevance {
684 exact_name_match: false,
689 is_item_from_trait: false,
690 is_name_already_imported: false,
691 requires_import: false,
693 is_private_editable: false,
704 fn sets_deprecated_flag_in_items() {
708 fn something_deprecated() {}
712 SymbolKind::Function,
717 source_range: 56..59,
727 label: "something_deprecated()",
728 source_range: 56..59,
730 insert: "something_deprecated()$0",
734 lookup: "something_deprecated",
744 struct A { #[deprecated] the_field: u32 }
745 fn foo() { A { the$0 } }
752 source_range: 57..60,
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,
790 fn bar(self) { self.$0 }
792 &[CompletionItemKind::Method, CompletionItemKind::SymbolKind(SymbolKind::Field)],
797 source_range: 94..94,
803 documentation: Documentation(
809 source_range: 94..94,
816 documentation: Documentation(
839 CompletionItemKind::SymbolKind(SymbolKind::Module),
840 CompletionItemKind::SymbolKind(SymbolKind::Variant),
841 CompletionItemKind::SymbolKind(SymbolKind::Enum),
847 source_range: 10..12,
853 documentation: Documentation(
859 source_range: 10..12,
866 documentation: Documentation(
872 source_range: 10..12,
878 documentation: Documentation(
888 fn dont_render_attrs() {
894 fn the_method(&self) { }
896 fn foo(s: S) { s.$0 }
898 CompletionItemKind::Method,
902 label: "the_method()",
903 source_range: 81..81,
905 insert: "the_method()$0",
907 lookup: "the_method",
916 fn no_call_parens_if_fn_ptr_needed() {
917 cov_mark::check!(no_call_parens_if_fn_ptr_needed);
921 fn foo(foo: u8, bar: u8) {}
922 struct ManualVtable { f: fn(u8, u8) }
924 fn main() -> ManualVtable {
925 ManualVtable { f: f$0 }
929 fn foo(foo: u8, bar: u8) {}
930 struct ManualVtable { f: fn(u8, u8) }
932 fn main() -> ManualVtable {
933 ManualVtable { f: foo }
940 struct RawIdentTable { r#type: u32 }
942 fn main() -> RawIdentTable {
943 RawIdentTable { t$0: 42 }
947 struct RawIdentTable { r#type: u32 }
949 fn main() -> RawIdentTable {
950 RawIdentTable { r#type: 42 }
957 fn no_parens_in_use_item() {
961 mod m { pub fn foo() {} }
965 mod m { pub fn foo() {} }
972 fn no_parens_in_call() {
988 impl Foo { fn foo(&self){} }
989 fn f(foo: &Foo) { foo.f$0(); }
993 impl Foo { fn foo(&self){} }
994 fn f(foo: &Foo) { foo.foo(); }
1000 fn inserts_angle_brackets_for_generics() {
1001 cov_mark::check!(inserts_angle_brackets_for_generics);
1027 struct Vec<T = i128> {}
1031 struct Vec<T = i128> {}
1039 fn foo(xs: Ve$0<i128>)
1043 fn foo(xs: Vec<i128>)
1049 fn active_param_relevance() {
1052 struct S { foo: i64, bar: u32, baz: u32 }
1053 fn test(bar: u32) { }
1054 fn foo(s: S) { test(s.$0) }
1065 fn record_field_relevances() {
1068 struct A { foo: i64, bar: u32, baz: u32 }
1069 struct B { x: (), y: f32, bar: u32 }
1070 fn foo(a: A) { B { bar: a.$0 }; }
1081 fn record_field_and_call_relevances() {
1084 struct A { foo: i64, bar: u32, baz: u32 }
1085 struct B { x: (), y: f32, bar: u32 }
1087 fn foo(a: A) { B { bar: f(a.$0) }; }
1097 struct A { foo: i64, bar: u32, baz: u32 }
1098 struct B { x: (), y: f32, bar: u32 }
1100 fn foo(a: A) { f(B { bar: a.$0 }); }
1111 fn prioritize_exact_ref_match() {
1114 struct WorldSnapshot { _f: () };
1115 fn go(world: &WorldSnapshot) { go(w$0) }
1118 lc world [type+name+local]
1119 st WorldSnapshot {…} []
1120 st &WorldSnapshot {…} [type]
1128 fn too_many_arguments() {
1129 cov_mark::check!(too_many_arguments);
1133 fn f(foo: &Foo) { f(foo, w$0) }
1144 fn score_fn_type_and_name_match() {
1147 struct A { bar: u8 }
1148 fn baz() -> u8 { 0 }
1149 fn bar() -> u8 { 0 }
1150 fn f() { A { bar: b$0 }; }
1153 fn bar() [type+name]
1162 fn score_method_type_and_name_match() {
1168 fn aaa(&self) -> u32 { 0 }
1169 fn bbb(&self) -> u32 { 0 }
1170 fn ccc(&self) -> u64 { 0 }
1177 me aaa() [type+name]
1185 fn score_method_name_match_only() {
1191 fn aaa(&self) -> u64 { 0 }
1204 fn suggest_ref_mut() {
1205 cov_mark::check!(suggest_ref);
1209 fn foo(s: &mut S) {}
1217 lc &mut s [type+name+local]
1228 fn foo(s: &mut S) {}
1235 lc s [type+name+local]
1245 fn foo(s: &mut S) {}
1252 lc ssss [type+local]
1262 fn suggest_deref() {
1269 impl core::ops::Deref for T {
1272 fn deref(&self) -> &Self::Target {
1303 fn suggest_deref_mut() {
1306 //- minicore: deref_mut
1310 impl core::ops::Deref for T {
1313 fn deref(&self) -> &Self::Target {
1318 impl core::ops::DerefMut for T {
1319 fn deref_mut(&mut self) -> &mut Self::Target {
1324 fn foo(s: &mut S) {}
1336 lc &mut t [type+local]
1410 fn suggest_deref_fn_ret() {
1417 impl core::ops::Deref for T {
1420 fn deref(&self) -> &Self::Target {
1448 fn op_function_relevances() {
1453 fn sub(self, other: Self) -> Self { self }
1456 fn foo(a: u32) { a.$0 }
1459 me sub(…) (as Sub) [op_method]
1469 pub trait PartialEq<Rhs: ?Sized = Self> {
1470 fn eq(&self, other: &Rhs) -> bool;
1471 fn ne(&self, other: &Rhs) -> bool;
1474 impl PartialEq for Foo {}
1481 me eq(…) (as PartialEq) [op_method]
1482 me ne(…) (as PartialEq) [op_method]
1488 fn struct_field_method_ref() {
1491 struct Foo { bar: u32 }
1492 impl Foo { fn baz(&self) -> u32 { 0 } }
1494 fn foo(f: Foo) { let _: &u32 = f.b$0 }
1496 &[CompletionItemKind::Method, CompletionItemKind::SymbolKind(SymbolKind::Field)],
1498 // Ideally we'd also suggest &f.bar and &f.baz() as exact
1499 // type matches. See #8058.
1504 source_range: 98..99,
1509 detail: "fn(&self) -> u32",
1513 source_range: 98..99,
1527 fn qualified_path_ref() {
1528 // disabled right now because it doesn't render correctly, #8058
1544 &[CompletionItemKind::SymbolKind(SymbolKind::Function)],
1549 source_range: 95..95,
1556 detail: "fn() -> S",
1567 enum Foo<T> { A(T), B }
1568 // bar() should not be an exact type match
1569 // because the generic parameters are different
1570 fn bar() -> Foo<u8> { Foo::B }
1571 // FIXME baz() should be an exact type match
1572 // because the types could unify, but it currently
1573 // is not. This is due to the T here being
1574 // TyKind::Placeholder rather than TyKind::Missing.
1575 fn baz<T>() -> Foo<T> { Foo::B }
1577 let foo: Foo<u32> = Foo::B;
1578 let _: Foo<u32> = f$0;
1583 ev Foo::A(…) [type_could_unify]
1584 ev Foo::B [type_could_unify]
1594 fn postfix_exact_match_is_high_priority() {
1595 cov_mark::check!(postfix_exact_match_is_high_priority);
1596 check_relevance_for_kinds(
1601 fn not(self) -> Self::Output;
1606 fn not(self) -> bool { if self { false } else { true }}
1611 let _: bool = (9 > 2).not$0;
1614 &[CompletionItemKind::Snippet, CompletionItemKind::Method],
1617 me not() (use ops::Not) [type_could_unify+requires_import]
1632 fn postfix_inexact_match_is_low_priority() {
1633 cov_mark::check!(postfix_inexact_match_is_low_priority);
1634 check_relevance_for_kinds(
1644 &[CompletionItemKind::Snippet, CompletionItemKind::Method],
1661 fn flyimport_reduced_relevance() {
1666 pub trait BufRead {}
1667 pub struct BufReader;
1668 pub struct BufWriter;
1681 tt BufRead (use std::io::BufRead) [requires_import]
1682 st BufReader (use std::io::BufReader) [requires_import]
1683 st BufWriter (use std::io::BufWriter) [requires_import]