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::{IdentContext, NameRefContext, NameRefKind, 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 pub(crate) fn path_is_call(&self) -> bool {
79 self.completion.ident_ctx,
80 IdentContext::NameRef(NameRefContext {
81 kind: Some(NameRefKind::Path(PathCompletionCtx { has_call_parens: true, .. })),
87 fn is_deprecated(&self, def: impl HasAttrs) -> bool {
88 let attrs = def.attrs(self.db());
89 attrs.by_key("deprecated").exists()
92 fn is_deprecated_assoc_item(&self, as_assoc_item: impl AsAssocItem) -> bool {
94 let assoc = match as_assoc_item.as_assoc_item(db) {
99 let is_assoc_deprecated = match assoc {
100 hir::AssocItem::Function(it) => self.is_deprecated(it),
101 hir::AssocItem::Const(it) => self.is_deprecated(it),
102 hir::AssocItem::TypeAlias(it) => self.is_deprecated(it),
106 .containing_trait_or_trait_impl(db)
107 .map(|trait_| self.is_deprecated(trait_))
111 // FIXME: remove this
112 fn docs(&self, def: impl HasAttrs) -> Option<hir::Documentation> {
117 pub(crate) fn render_field(
118 ctx: RenderContext<'_>,
119 receiver: Option<hir::Name>,
122 ) -> CompletionItem {
123 let is_deprecated = ctx.is_deprecated(field);
124 let name = field.name(ctx.db()).to_smol_str();
125 let mut item = CompletionItem::new(
128 receiver.map_or_else(|| name.clone(), |receiver| format!("{}.{}", receiver, name).into()),
130 item.set_relevance(CompletionRelevance {
131 type_match: compute_type_match(ctx.completion, ty),
132 exact_name_match: compute_exact_name_match(ctx.completion, name.as_str()),
133 ..CompletionRelevance::default()
135 item.detail(ty.display(ctx.db()).to_string())
136 .set_documentation(field.docs(ctx.db()))
137 .set_deprecated(is_deprecated)
138 .lookup_by(name.clone());
139 let is_keyword = SyntaxKind::from_keyword(name.as_str()).is_some();
140 if is_keyword && !matches!(name.as_str(), "self" | "crate" | "super" | "Self") {
141 item.insert_text(format!("r#{}", name));
143 if let Some(_ref_match) = compute_ref_match(ctx.completion, ty) {
145 // For now we don't properly calculate the edits for ref match
146 // completions on struct fields, so we've disabled them. See #8058.
151 pub(crate) fn render_tuple_field(
152 ctx: RenderContext<'_>,
153 receiver: Option<hir::Name>,
156 ) -> CompletionItem {
157 let mut item = CompletionItem::new(
160 receiver.map_or_else(|| field.to_string(), |receiver| format!("{}.{}", receiver, field)),
162 item.detail(ty.display(ctx.db()).to_string()).lookup_by(field.to_string());
166 pub(crate) fn render_resolution(
167 ctx: RenderContext<'_>,
168 local_name: hir::Name,
169 resolution: ScopeDef,
171 render_resolution_(ctx, local_name, None, resolution)
174 pub(crate) fn render_resolution_simple(
175 ctx: RenderContext<'_>,
176 local_name: hir::Name,
177 resolution: ScopeDef,
179 render_resolution_simple_(ctx, local_name, None, resolution)
182 pub(crate) fn render_resolution_with_import(
183 ctx: RenderContext<'_>,
184 import_edit: LocatedImport,
185 ) -> Option<Builder> {
186 let resolution = ScopeDef::from(import_edit.original_item);
187 let local_name = match resolution {
188 ScopeDef::ModuleDef(hir::ModuleDef::Function(f)) => f.name(ctx.completion.db),
189 ScopeDef::ModuleDef(hir::ModuleDef::Const(c)) => c.name(ctx.completion.db)?,
190 ScopeDef::ModuleDef(hir::ModuleDef::TypeAlias(t)) => t.name(ctx.completion.db),
191 _ => item_name(ctx.db(), import_edit.original_item)?,
193 Some(render_resolution_(ctx, local_name, Some(import_edit), resolution))
196 pub(crate) fn render_type_inference(ty_string: String, ctx: &CompletionContext) -> CompletionItem {
198 CompletionItem::new(CompletionItemKind::InferredType, ctx.source_range(), ty_string);
199 builder.set_relevance(CompletionRelevance { is_definite: true, ..Default::default() });
203 fn render_resolution_(
204 ctx: RenderContext<'_>,
205 local_name: hir::Name,
206 import_to_add: Option<LocatedImport>,
207 resolution: ScopeDef,
209 let _p = profile::span("render_resolution");
210 use hir::ModuleDef::*;
213 ScopeDef::ModuleDef(Macro(mac)) => {
214 let ctx = ctx.import_to_add(import_to_add);
215 return render_macro(ctx, local_name, mac);
217 ScopeDef::ModuleDef(Function(func)) => {
218 let ctx = ctx.import_to_add(import_to_add);
219 return render_fn(ctx, Some(local_name), func);
221 ScopeDef::ModuleDef(Variant(var)) if ctx.completion.pattern_ctx.is_none() => {
222 let ctx = ctx.clone().import_to_add(import_to_add.clone());
223 if let Some(item) = render_variant_lit(ctx, Some(local_name.clone()), var, None) {
229 render_resolution_simple_(ctx, local_name, import_to_add, resolution)
232 fn render_resolution_simple_(
233 ctx: RenderContext<'_>,
234 local_name: hir::Name,
235 import_to_add: Option<LocatedImport>,
236 resolution: ScopeDef,
238 let _p = profile::span("render_resolution");
239 use hir::ModuleDef::*;
242 let ctx = ctx.import_to_add(import_to_add);
243 let kind = match resolution {
244 ScopeDef::Unknown => CompletionItemKind::UnresolvedReference,
245 ScopeDef::ModuleDef(Function(_)) => CompletionItemKind::SymbolKind(SymbolKind::Function),
246 ScopeDef::ModuleDef(Variant(_)) => CompletionItemKind::SymbolKind(SymbolKind::Variant),
247 ScopeDef::ModuleDef(Macro(_)) => CompletionItemKind::SymbolKind(SymbolKind::Macro),
248 ScopeDef::ModuleDef(Module(..)) => CompletionItemKind::SymbolKind(SymbolKind::Module),
249 ScopeDef::ModuleDef(Adt(adt)) => CompletionItemKind::SymbolKind(match adt {
250 hir::Adt::Struct(_) => SymbolKind::Struct,
251 hir::Adt::Union(_) => SymbolKind::Union,
252 hir::Adt::Enum(_) => SymbolKind::Enum,
254 ScopeDef::ModuleDef(Const(..)) => CompletionItemKind::SymbolKind(SymbolKind::Const),
255 ScopeDef::ModuleDef(Static(..)) => CompletionItemKind::SymbolKind(SymbolKind::Static),
256 ScopeDef::ModuleDef(Trait(..)) => CompletionItemKind::SymbolKind(SymbolKind::Trait),
257 ScopeDef::ModuleDef(TypeAlias(..)) => CompletionItemKind::SymbolKind(SymbolKind::TypeAlias),
258 ScopeDef::ModuleDef(BuiltinType(..)) => CompletionItemKind::BuiltinType,
259 ScopeDef::GenericParam(param) => CompletionItemKind::SymbolKind(match param {
260 hir::GenericParam::TypeParam(_) => SymbolKind::TypeParam,
261 hir::GenericParam::ConstParam(_) => SymbolKind::ConstParam,
262 hir::GenericParam::LifetimeParam(_) => SymbolKind::LifetimeParam,
264 ScopeDef::Local(..) => CompletionItemKind::SymbolKind(SymbolKind::Local),
265 ScopeDef::Label(..) => CompletionItemKind::SymbolKind(SymbolKind::Label),
266 ScopeDef::AdtSelfType(..) | ScopeDef::ImplSelfType(..) => {
267 CompletionItemKind::SymbolKind(SymbolKind::SelfParam)
271 let local_name = local_name.to_smol_str();
272 let mut item = CompletionItem::new(kind, ctx.source_range(), local_name.clone());
273 item.set_relevance(ctx.completion_relevance());
274 if let ScopeDef::Local(local) = resolution {
275 let ty = local.ty(db);
276 if !ty.is_unknown() {
277 item.detail(ty.display(db).to_string());
280 item.set_relevance(CompletionRelevance {
281 type_match: compute_type_match(ctx.completion, &ty),
282 exact_name_match: compute_exact_name_match(ctx.completion, &local_name),
284 ..CompletionRelevance::default()
287 if let Some(ref_match) = compute_ref_match(ctx.completion, &ty) {
288 item.ref_match(ref_match);
292 // Add `<>` for generic types
293 let type_path_no_ty_args = matches!(
294 ctx.completion.ident_ctx,
295 IdentContext::NameRef(NameRefContext {
296 kind: Some(NameRefKind::Path(PathCompletionCtx {
297 kind: PathKind::Type { .. },
298 has_type_args: false,
303 ) && ctx.completion.config.callable.is_some();
304 if type_path_no_ty_args {
305 if let Some(cap) = ctx.snippet_cap() {
306 let has_non_default_type_params = match resolution {
307 ScopeDef::ModuleDef(Adt(it)) => it.has_non_default_type_params(db),
308 ScopeDef::ModuleDef(TypeAlias(it)) => it.has_non_default_type_params(db),
311 if has_non_default_type_params {
312 cov_mark::hit!(inserts_angle_brackets_for_generics);
313 item.lookup_by(local_name.clone())
314 .label(SmolStr::from_iter([&local_name, "<…>"]))
316 .insert_snippet(cap, format!("{}<$0>", local_name));
320 item.set_documentation(scope_def_docs(db, resolution))
321 .set_deprecated(scope_def_is_deprecated(&ctx, resolution));
323 if let Some(import_to_add) = ctx.import_to_add {
324 item.add_import(import_to_add);
329 fn scope_def_docs(db: &RootDatabase, resolution: ScopeDef) -> Option<hir::Documentation> {
330 use hir::ModuleDef::*;
332 ScopeDef::ModuleDef(Module(it)) => it.docs(db),
333 ScopeDef::ModuleDef(Adt(it)) => it.docs(db),
334 ScopeDef::ModuleDef(Variant(it)) => it.docs(db),
335 ScopeDef::ModuleDef(Const(it)) => it.docs(db),
336 ScopeDef::ModuleDef(Static(it)) => it.docs(db),
337 ScopeDef::ModuleDef(Trait(it)) => it.docs(db),
338 ScopeDef::ModuleDef(TypeAlias(it)) => it.docs(db),
343 fn scope_def_is_deprecated(ctx: &RenderContext<'_>, resolution: ScopeDef) -> bool {
345 ScopeDef::ModuleDef(it) => ctx.is_deprecated_assoc_item(it),
346 ScopeDef::GenericParam(it) => ctx.is_deprecated(it),
347 ScopeDef::AdtSelfType(it) => ctx.is_deprecated(it),
352 fn compute_type_match(
353 ctx: &CompletionContext,
354 completion_ty: &hir::Type,
355 ) -> Option<CompletionRelevanceTypeMatch> {
356 let expected_type = ctx.expected_type.as_ref()?;
358 // We don't ever consider unit type to be an exact type match, since
359 // nearly always this is not meaningful to the user.
360 if expected_type.is_unit() {
364 if completion_ty == expected_type {
365 Some(CompletionRelevanceTypeMatch::Exact)
366 } else if expected_type.could_unify_with(ctx.db, completion_ty) {
367 Some(CompletionRelevanceTypeMatch::CouldUnify)
373 fn compute_exact_name_match(ctx: &CompletionContext, completion_name: &str) -> bool {
374 ctx.expected_name.as_ref().map_or(false, |name| name.text() == completion_name)
377 fn compute_ref_match(
378 ctx: &CompletionContext,
379 completion_ty: &hir::Type,
380 ) -> Option<hir::Mutability> {
381 let expected_type = ctx.expected_type.as_ref()?;
382 if completion_ty != expected_type {
383 let expected_type_without_ref = expected_type.remove_ref()?;
384 if completion_ty.autoderef(ctx.db).any(|deref_ty| deref_ty == expected_type_without_ref) {
385 cov_mark::hit!(suggest_ref);
386 let mutability = if expected_type.is_mutable_reference() {
389 hir::Mutability::Shared
391 return Some(mutability);
401 use expect_test::{expect, Expect};
402 use ide_db::SymbolKind;
403 use itertools::Itertools;
406 item::CompletionRelevanceTypeMatch,
407 tests::{check_edit, do_completion, get_all_items, TEST_CONFIG},
408 CompletionItem, CompletionItemKind, CompletionRelevance, CompletionRelevancePostfixMatch,
412 fn check(ra_fixture: &str, kind: impl Into<CompletionItemKind>, expect: Expect) {
413 let actual = do_completion(ra_fixture, kind.into());
414 expect.assert_debug_eq(&actual);
418 fn check_kinds(ra_fixture: &str, kinds: &[CompletionItemKind], expect: Expect) {
420 kinds.iter().flat_map(|&kind| do_completion(ra_fixture, kind)).collect();
421 expect.assert_debug_eq(&actual);
425 fn check_relevance_for_kinds(ra_fixture: &str, kinds: &[CompletionItemKind], expect: Expect) {
426 let mut actual = get_all_items(TEST_CONFIG, ra_fixture, None);
427 actual.retain(|it| kinds.contains(&it.kind()));
428 actual.sort_by_key(|it| cmp::Reverse(it.relevance().score()));
429 check_relevance_(actual, expect);
433 fn check_relevance(ra_fixture: &str, expect: Expect) {
434 let mut actual = get_all_items(TEST_CONFIG, ra_fixture, None);
435 actual.retain(|it| it.kind() != CompletionItemKind::Snippet);
436 actual.retain(|it| it.kind() != CompletionItemKind::Keyword);
437 actual.retain(|it| it.kind() != CompletionItemKind::BuiltinType);
438 actual.sort_by_key(|it| cmp::Reverse(it.relevance().score()));
439 check_relevance_(actual, expect);
443 fn check_relevance_(actual: Vec<CompletionItem>, expect: Expect) {
447 let mut items = vec![];
449 let tag = it.kind().tag();
450 let relevance = display_relevance(it.relevance());
451 items.push(format!("{} {} {}\n", tag, it.label(), relevance));
453 if let Some((mutability, relevance)) = it.ref_match() {
454 let label = format!("&{}{}", mutability.as_keyword_for_ref(), it.label());
455 let relevance = display_relevance(relevance);
457 items.push(format!("{} {} {}\n", tag, label, relevance));
462 .collect::<String>();
464 expect.assert_eq(&actual);
466 fn display_relevance(relevance: CompletionRelevance) -> String {
467 let relevance_factors = vec![
468 (relevance.type_match == Some(CompletionRelevanceTypeMatch::Exact), "type"),
470 relevance.type_match == Some(CompletionRelevanceTypeMatch::CouldUnify),
473 (relevance.exact_name_match, "name"),
474 (relevance.is_local, "local"),
476 relevance.postfix_match == Some(CompletionRelevancePostfixMatch::Exact),
479 (relevance.is_op_method, "op_method"),
480 (relevance.requires_import, "requires_import"),
483 .filter_map(|(cond, desc)| if cond { Some(desc) } else { None })
486 format!("[{}]", relevance_factors)
491 fn enum_detail_includes_record_fields() {
494 enum Foo { Foo { x: i32, y: i32 } }
496 fn main() { Foo::Fo$0 }
503 source_range: 54..56,
505 insert: "Foo { x: ${1:()}, y: ${2:()} }$0",
509 detail: "Foo { x: i32, y: i32 }",
517 fn enum_detail_includes_tuple_fields() {
520 enum Foo { Foo (i32, i32) }
522 fn main() { Foo::Fo$0 }
529 source_range: 46..48,
531 insert: "Foo(${1:()}, ${2:()})$0",
535 detail: "Foo(i32, i32)",
543 fn fn_detail_includes_args_and_return_type() {
546 fn foo<T>(a: u32, b: u32, t: T) -> (u32, T) { (a, t) }
550 SymbolKind::Function,
555 source_range: 68..70,
557 insert: "foo(${1:a}, ${2:b}, ${3:t})$0",
562 detail: "fn(u32, u32, T) -> (u32, T)",
563 trigger_call_info: true,
567 source_range: 68..70,
582 fn enum_detail_just_name_for_unit() {
587 fn main() { Foo::Fo$0 }
594 source_range: 35..37,
608 fn lookup_enums_by_two_qualifiers() {
612 pub enum Spam { Foo, Bar(i32) }
614 fn main() { let _: m::Spam = S$0 }
617 CompletionItemKind::SymbolKind(SymbolKind::Function),
618 CompletionItemKind::SymbolKind(SymbolKind::Module),
619 CompletionItemKind::SymbolKind(SymbolKind::Variant),
625 source_range: 75..76,
636 source_range: 75..76,
644 label: "m::Spam::Bar(…)",
645 source_range: 75..76,
647 insert: "m::Spam::Bar(${1:()})$0",
651 lookup: "Spam::Bar(…)",
652 detail: "m::Spam::Bar(i32)",
653 relevance: CompletionRelevance {
654 exact_name_match: false,
659 is_item_from_trait: false,
660 is_name_already_imported: false,
661 requires_import: false,
663 is_private_editable: false,
669 label: "m::Spam::Foo",
670 source_range: 75..76,
672 insert: "m::Spam::Foo$0",
677 detail: "m::Spam::Foo",
678 relevance: CompletionRelevance {
679 exact_name_match: false,
684 is_item_from_trait: false,
685 is_name_already_imported: false,
686 requires_import: false,
688 is_private_editable: false,
699 fn sets_deprecated_flag_in_items() {
703 fn something_deprecated() {}
707 SymbolKind::Function,
712 source_range: 56..59,
722 label: "something_deprecated()",
723 source_range: 56..59,
725 insert: "something_deprecated()$0",
729 lookup: "something_deprecated",
739 struct A { #[deprecated] the_field: u32 }
740 fn foo() { A { the$0 } }
747 source_range: 57..60,
755 relevance: CompletionRelevance {
756 exact_name_match: false,
761 is_item_from_trait: false,
762 is_name_already_imported: false,
763 requires_import: false,
765 is_private_editable: false,
785 fn bar(self) { self.$0 }
787 &[CompletionItemKind::Method, CompletionItemKind::SymbolKind(SymbolKind::Field)],
792 source_range: 94..94,
798 documentation: Documentation(
804 source_range: 94..94,
811 documentation: Documentation(
834 CompletionItemKind::SymbolKind(SymbolKind::Module),
835 CompletionItemKind::SymbolKind(SymbolKind::Variant),
836 CompletionItemKind::SymbolKind(SymbolKind::Enum),
842 source_range: 10..12,
848 documentation: Documentation(
854 source_range: 10..12,
861 documentation: Documentation(
867 source_range: 10..12,
873 documentation: Documentation(
883 fn dont_render_attrs() {
889 fn the_method(&self) { }
891 fn foo(s: S) { s.$0 }
893 CompletionItemKind::Method,
897 label: "the_method()",
898 source_range: 81..81,
900 insert: "the_method()$0",
902 lookup: "the_method",
911 fn no_call_parens_if_fn_ptr_needed() {
912 cov_mark::check!(no_call_parens_if_fn_ptr_needed);
916 fn foo(foo: u8, bar: u8) {}
917 struct ManualVtable { f: fn(u8, u8) }
919 fn main() -> ManualVtable {
920 ManualVtable { f: f$0 }
924 fn foo(foo: u8, bar: u8) {}
925 struct ManualVtable { f: fn(u8, u8) }
927 fn main() -> ManualVtable {
928 ManualVtable { f: foo }
935 struct RawIdentTable { r#type: u32 }
937 fn main() -> RawIdentTable {
938 RawIdentTable { t$0: 42 }
942 struct RawIdentTable { r#type: u32 }
944 fn main() -> RawIdentTable {
945 RawIdentTable { r#type: 42 }
952 fn no_parens_in_use_item() {
956 mod m { pub fn foo() {} }
960 mod m { pub fn foo() {} }
967 fn no_parens_in_call() {
983 impl Foo { fn foo(&self){} }
984 fn f(foo: &Foo) { foo.f$0(); }
988 impl Foo { fn foo(&self){} }
989 fn f(foo: &Foo) { foo.foo(); }
995 fn inserts_angle_brackets_for_generics() {
996 cov_mark::check!(inserts_angle_brackets_for_generics);
1022 struct Vec<T = i128> {}
1026 struct Vec<T = i128> {}
1034 fn foo(xs: Ve$0<i128>)
1038 fn foo(xs: Vec<i128>)
1044 fn active_param_relevance() {
1047 struct S { foo: i64, bar: u32, baz: u32 }
1048 fn test(bar: u32) { }
1049 fn foo(s: S) { test(s.$0) }
1060 fn record_field_relevances() {
1063 struct A { foo: i64, bar: u32, baz: u32 }
1064 struct B { x: (), y: f32, bar: u32 }
1065 fn foo(a: A) { B { bar: a.$0 }; }
1076 fn record_field_and_call_relevances() {
1079 struct A { foo: i64, bar: u32, baz: u32 }
1080 struct B { x: (), y: f32, bar: u32 }
1082 fn foo(a: A) { B { bar: f(a.$0) }; }
1092 struct A { foo: i64, bar: u32, baz: u32 }
1093 struct B { x: (), y: f32, bar: u32 }
1095 fn foo(a: A) { f(B { bar: a.$0 }); }
1106 fn prioritize_exact_ref_match() {
1109 struct WorldSnapshot { _f: () };
1110 fn go(world: &WorldSnapshot) { go(w$0) }
1113 lc world [type+name+local]
1114 st WorldSnapshot {…} []
1115 st &WorldSnapshot {…} [type]
1123 fn too_many_arguments() {
1124 cov_mark::check!(too_many_arguments);
1128 fn f(foo: &Foo) { f(foo, w$0) }
1139 fn score_fn_type_and_name_match() {
1142 struct A { bar: u8 }
1143 fn baz() -> u8 { 0 }
1144 fn bar() -> u8 { 0 }
1145 fn f() { A { bar: b$0 }; }
1148 fn bar() [type+name]
1157 fn score_method_type_and_name_match() {
1163 fn aaa(&self) -> u32 { 0 }
1164 fn bbb(&self) -> u32 { 0 }
1165 fn ccc(&self) -> u64 { 0 }
1172 me aaa() [type+name]
1180 fn score_method_name_match_only() {
1186 fn aaa(&self) -> u64 { 0 }
1199 fn suggest_ref_mut() {
1200 cov_mark::check!(suggest_ref);
1204 fn foo(s: &mut S) {}
1212 lc &mut s [type+name+local]
1223 fn foo(s: &mut S) {}
1230 lc s [type+name+local]
1240 fn foo(s: &mut S) {}
1247 lc ssss [type+local]
1257 fn suggest_deref() {
1264 impl core::ops::Deref for T {
1267 fn deref(&self) -> &Self::Target {
1298 fn suggest_deref_mut() {
1301 //- minicore: deref_mut
1305 impl core::ops::Deref for T {
1308 fn deref(&self) -> &Self::Target {
1313 impl core::ops::DerefMut for T {
1314 fn deref_mut(&mut self) -> &mut Self::Target {
1319 fn foo(s: &mut S) {}
1331 lc &mut t [type+local]
1405 fn suggest_deref_fn_ret() {
1412 impl core::ops::Deref for T {
1415 fn deref(&self) -> &Self::Target {
1443 fn op_function_relevances() {
1448 fn sub(self, other: Self) -> Self { self }
1451 fn foo(a: u32) { a.$0 }
1454 me sub(…) (as Sub) [op_method]
1464 pub trait PartialEq<Rhs: ?Sized = Self> {
1465 fn eq(&self, other: &Rhs) -> bool;
1466 fn ne(&self, other: &Rhs) -> bool;
1469 impl PartialEq for Foo {}
1476 me eq(…) (as PartialEq) [op_method]
1477 me ne(…) (as PartialEq) [op_method]
1483 fn struct_field_method_ref() {
1486 struct Foo { bar: u32 }
1487 impl Foo { fn baz(&self) -> u32 { 0 } }
1489 fn foo(f: Foo) { let _: &u32 = f.b$0 }
1491 &[CompletionItemKind::Method, CompletionItemKind::SymbolKind(SymbolKind::Field)],
1493 // Ideally we'd also suggest &f.bar and &f.baz() as exact
1494 // type matches. See #8058.
1499 source_range: 98..99,
1504 detail: "fn(&self) -> u32",
1508 source_range: 98..99,
1522 fn qualified_path_ref() {
1523 // disabled right now because it doesn't render correctly, #8058
1539 &[CompletionItemKind::SymbolKind(SymbolKind::Function)],
1544 source_range: 95..95,
1551 detail: "fn() -> S",
1562 enum Foo<T> { A(T), B }
1563 // bar() should not be an exact type match
1564 // because the generic parameters are different
1565 fn bar() -> Foo<u8> { Foo::B }
1566 // FIXME baz() should be an exact type match
1567 // because the types could unify, but it currently
1568 // is not. This is due to the T here being
1569 // TyKind::Placeholder rather than TyKind::Missing.
1570 fn baz<T>() -> Foo<T> { Foo::B }
1572 let foo: Foo<u32> = Foo::B;
1573 let _: Foo<u32> = f$0;
1578 ev Foo::A(…) [type_could_unify]
1579 ev Foo::B [type_could_unify]
1589 fn postfix_exact_match_is_high_priority() {
1590 cov_mark::check!(postfix_exact_match_is_high_priority);
1591 check_relevance_for_kinds(
1596 fn not(self) -> Self::Output;
1601 fn not(self) -> bool { if self { false } else { true }}
1606 let _: bool = (9 > 2).not$0;
1609 &[CompletionItemKind::Snippet, CompletionItemKind::Method],
1612 me not() (use ops::Not) [type_could_unify+requires_import]
1627 fn postfix_inexact_match_is_low_priority() {
1628 cov_mark::check!(postfix_inexact_match_is_low_priority);
1629 check_relevance_for_kinds(
1639 &[CompletionItemKind::Snippet, CompletionItemKind::Method],
1656 fn flyimport_reduced_relevance() {
1661 pub trait BufRead {}
1662 pub struct BufReader;
1663 pub struct BufWriter;
1676 tt BufRead (use std::io::BufRead) [requires_import]
1677 st BufReader (use std::io::BufReader) [requires_import]
1678 st BufWriter (use std::io::BufWriter) [requires_import]