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 pub(crate) fn path_is_call(&self) -> bool {
78 self.completion.path_context().map_or(false, |it| it.has_call_parens)
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 receiver: Option<hir::Name>,
116 ) -> CompletionItem {
117 let is_deprecated = ctx.is_deprecated(field);
118 let name = field.name(ctx.db()).to_smol_str();
119 let mut item = CompletionItem::new(
122 receiver.map_or_else(|| name.clone(), |receiver| format!("{}.{}", receiver, name).into()),
124 item.set_relevance(CompletionRelevance {
125 type_match: compute_type_match(ctx.completion, ty),
126 exact_name_match: compute_exact_name_match(ctx.completion, name.as_str()),
127 ..CompletionRelevance::default()
129 item.detail(ty.display(ctx.db()).to_string())
130 .set_documentation(field.docs(ctx.db()))
131 .set_deprecated(is_deprecated)
132 .lookup_by(name.clone());
133 let is_keyword = SyntaxKind::from_keyword(name.as_str()).is_some();
134 if is_keyword && !matches!(name.as_str(), "self" | "crate" | "super" | "Self") {
135 item.insert_text(format!("r#{}", name));
137 if let Some(_ref_match) = compute_ref_match(ctx.completion, ty) {
139 // For now we don't properly calculate the edits for ref match
140 // completions on struct fields, so we've disabled them. See #8058.
145 pub(crate) fn render_tuple_field(
146 ctx: RenderContext<'_>,
147 receiver: Option<hir::Name>,
150 ) -> CompletionItem {
151 let mut item = CompletionItem::new(
154 receiver.map_or_else(|| field.to_string(), |receiver| format!("{}.{}", receiver, field)),
156 item.detail(ty.display(ctx.db()).to_string()).lookup_by(field.to_string());
160 pub(crate) fn render_resolution(
161 ctx: RenderContext<'_>,
162 local_name: hir::Name,
163 resolution: ScopeDef,
165 render_resolution_(ctx, local_name, None, resolution)
168 pub(crate) fn render_resolution_simple(
169 ctx: RenderContext<'_>,
170 local_name: hir::Name,
171 resolution: ScopeDef,
173 render_resolution_simple_(ctx, local_name, None, resolution)
176 pub(crate) fn render_resolution_with_import(
177 ctx: RenderContext<'_>,
178 import_edit: LocatedImport,
179 ) -> Option<Builder> {
180 let resolution = ScopeDef::from(import_edit.original_item);
181 let local_name = match resolution {
182 ScopeDef::ModuleDef(hir::ModuleDef::Function(f)) => f.name(ctx.completion.db),
183 ScopeDef::ModuleDef(hir::ModuleDef::Const(c)) => c.name(ctx.completion.db)?,
184 ScopeDef::ModuleDef(hir::ModuleDef::TypeAlias(t)) => t.name(ctx.completion.db),
185 _ => item_name(ctx.db(), import_edit.original_item)?,
187 Some(render_resolution_(ctx, local_name, Some(import_edit), resolution))
190 pub(crate) fn render_type_inference(ty_string: String, ctx: &CompletionContext) -> CompletionItem {
192 CompletionItem::new(CompletionItemKind::InferredType, ctx.source_range(), ty_string);
193 builder.set_relevance(CompletionRelevance { is_definite: true, ..Default::default() });
197 fn render_resolution_(
198 ctx: RenderContext<'_>,
199 local_name: hir::Name,
200 import_to_add: Option<LocatedImport>,
201 resolution: ScopeDef,
203 let _p = profile::span("render_resolution");
204 use hir::ModuleDef::*;
207 ScopeDef::ModuleDef(Macro(mac)) => {
208 let ctx = ctx.import_to_add(import_to_add);
209 return render_macro(ctx, local_name, mac);
211 ScopeDef::ModuleDef(Function(func)) => {
212 let ctx = ctx.import_to_add(import_to_add);
213 return render_fn(ctx, Some(local_name), func);
215 ScopeDef::ModuleDef(Variant(var)) if ctx.completion.pattern_ctx.is_none() => {
216 let ctx = ctx.clone().import_to_add(import_to_add.clone());
217 if let Some(item) = render_variant_lit(ctx, Some(local_name.clone()), var, None) {
223 render_resolution_simple_(ctx, local_name, import_to_add, resolution)
226 fn render_resolution_simple_(
227 ctx: RenderContext<'_>,
228 local_name: hir::Name,
229 import_to_add: Option<LocatedImport>,
230 resolution: ScopeDef,
232 let _p = profile::span("render_resolution");
233 use hir::ModuleDef::*;
236 let ctx = ctx.import_to_add(import_to_add);
237 let kind = match resolution {
238 ScopeDef::Unknown => CompletionItemKind::UnresolvedReference,
239 ScopeDef::ModuleDef(Function(_)) => CompletionItemKind::SymbolKind(SymbolKind::Function),
240 ScopeDef::ModuleDef(Variant(_)) => CompletionItemKind::SymbolKind(SymbolKind::Variant),
241 ScopeDef::ModuleDef(Macro(_)) => CompletionItemKind::SymbolKind(SymbolKind::Macro),
242 ScopeDef::ModuleDef(Module(..)) => CompletionItemKind::SymbolKind(SymbolKind::Module),
243 ScopeDef::ModuleDef(Adt(adt)) => CompletionItemKind::SymbolKind(match adt {
244 hir::Adt::Struct(_) => SymbolKind::Struct,
245 hir::Adt::Union(_) => SymbolKind::Union,
246 hir::Adt::Enum(_) => SymbolKind::Enum,
248 ScopeDef::ModuleDef(Const(..)) => CompletionItemKind::SymbolKind(SymbolKind::Const),
249 ScopeDef::ModuleDef(Static(..)) => CompletionItemKind::SymbolKind(SymbolKind::Static),
250 ScopeDef::ModuleDef(Trait(..)) => CompletionItemKind::SymbolKind(SymbolKind::Trait),
251 ScopeDef::ModuleDef(TypeAlias(..)) => CompletionItemKind::SymbolKind(SymbolKind::TypeAlias),
252 ScopeDef::ModuleDef(BuiltinType(..)) => CompletionItemKind::BuiltinType,
253 ScopeDef::GenericParam(param) => CompletionItemKind::SymbolKind(match param {
254 hir::GenericParam::TypeParam(_) => SymbolKind::TypeParam,
255 hir::GenericParam::ConstParam(_) => SymbolKind::ConstParam,
256 hir::GenericParam::LifetimeParam(_) => SymbolKind::LifetimeParam,
258 ScopeDef::Local(..) => CompletionItemKind::SymbolKind(SymbolKind::Local),
259 ScopeDef::Label(..) => CompletionItemKind::SymbolKind(SymbolKind::Label),
260 ScopeDef::AdtSelfType(..) | ScopeDef::ImplSelfType(..) => {
261 CompletionItemKind::SymbolKind(SymbolKind::SelfParam)
265 let local_name = local_name.to_smol_str();
266 let mut item = CompletionItem::new(kind, ctx.source_range(), local_name.clone());
267 item.set_relevance(ctx.completion_relevance());
268 if let ScopeDef::Local(local) = resolution {
269 let ty = local.ty(db);
270 if !ty.is_unknown() {
271 item.detail(ty.display(db).to_string());
274 item.set_relevance(CompletionRelevance {
275 type_match: compute_type_match(ctx.completion, &ty),
276 exact_name_match: compute_exact_name_match(ctx.completion, &local_name),
278 ..CompletionRelevance::default()
281 if let Some(ref_match) = compute_ref_match(ctx.completion, &ty) {
282 item.ref_match(ref_match);
286 // Add `<>` for generic types
287 let type_path_no_ty_args = matches!(
288 ctx.completion.path_context(),
289 Some(PathCompletionCtx { kind: PathKind::Type { .. }, has_type_args: false, .. })
290 ) && ctx.completion.config.callable.is_some();
291 if type_path_no_ty_args {
292 if let Some(cap) = ctx.snippet_cap() {
293 let has_non_default_type_params = match resolution {
294 ScopeDef::ModuleDef(Adt(it)) => it.has_non_default_type_params(db),
295 ScopeDef::ModuleDef(TypeAlias(it)) => it.has_non_default_type_params(db),
298 if has_non_default_type_params {
299 cov_mark::hit!(inserts_angle_brackets_for_generics);
300 item.lookup_by(local_name.clone())
301 .label(SmolStr::from_iter([&local_name, "<…>"]))
303 .insert_snippet(cap, format!("{}<$0>", local_name));
307 item.set_documentation(scope_def_docs(db, resolution))
308 .set_deprecated(scope_def_is_deprecated(&ctx, resolution));
310 if let Some(import_to_add) = ctx.import_to_add {
311 item.add_import(import_to_add);
316 fn scope_def_docs(db: &RootDatabase, resolution: ScopeDef) -> Option<hir::Documentation> {
317 use hir::ModuleDef::*;
319 ScopeDef::ModuleDef(Module(it)) => it.docs(db),
320 ScopeDef::ModuleDef(Adt(it)) => it.docs(db),
321 ScopeDef::ModuleDef(Variant(it)) => it.docs(db),
322 ScopeDef::ModuleDef(Const(it)) => it.docs(db),
323 ScopeDef::ModuleDef(Static(it)) => it.docs(db),
324 ScopeDef::ModuleDef(Trait(it)) => it.docs(db),
325 ScopeDef::ModuleDef(TypeAlias(it)) => it.docs(db),
330 fn scope_def_is_deprecated(ctx: &RenderContext<'_>, resolution: ScopeDef) -> bool {
332 ScopeDef::ModuleDef(it) => ctx.is_deprecated_assoc_item(it),
333 ScopeDef::GenericParam(it) => ctx.is_deprecated(it),
334 ScopeDef::AdtSelfType(it) => ctx.is_deprecated(it),
339 fn compute_type_match(
340 ctx: &CompletionContext,
341 completion_ty: &hir::Type,
342 ) -> Option<CompletionRelevanceTypeMatch> {
343 let expected_type = ctx.expected_type.as_ref()?;
345 // We don't ever consider unit type to be an exact type match, since
346 // nearly always this is not meaningful to the user.
347 if expected_type.is_unit() {
351 if completion_ty == expected_type {
352 Some(CompletionRelevanceTypeMatch::Exact)
353 } else if expected_type.could_unify_with(ctx.db, completion_ty) {
354 Some(CompletionRelevanceTypeMatch::CouldUnify)
360 fn compute_exact_name_match(ctx: &CompletionContext, completion_name: &str) -> bool {
361 ctx.expected_name.as_ref().map_or(false, |name| name.text() == completion_name)
364 fn compute_ref_match(
365 ctx: &CompletionContext,
366 completion_ty: &hir::Type,
367 ) -> Option<hir::Mutability> {
368 let expected_type = ctx.expected_type.as_ref()?;
369 if completion_ty != expected_type {
370 let expected_type_without_ref = expected_type.remove_ref()?;
371 if completion_ty.autoderef(ctx.db).any(|deref_ty| deref_ty == expected_type_without_ref) {
372 cov_mark::hit!(suggest_ref);
373 let mutability = if expected_type.is_mutable_reference() {
376 hir::Mutability::Shared
378 return Some(mutability);
388 use expect_test::{expect, Expect};
389 use ide_db::SymbolKind;
390 use itertools::Itertools;
393 item::CompletionRelevanceTypeMatch,
394 tests::{check_edit, do_completion, get_all_items, TEST_CONFIG},
395 CompletionItem, CompletionItemKind, CompletionRelevance, CompletionRelevancePostfixMatch,
399 fn check(ra_fixture: &str, kind: impl Into<CompletionItemKind>, expect: Expect) {
400 let actual = do_completion(ra_fixture, kind.into());
401 expect.assert_debug_eq(&actual);
405 fn check_kinds(ra_fixture: &str, kinds: &[CompletionItemKind], expect: Expect) {
407 kinds.iter().flat_map(|&kind| do_completion(ra_fixture, kind)).collect();
408 expect.assert_debug_eq(&actual);
412 fn check_relevance_for_kinds(ra_fixture: &str, kinds: &[CompletionItemKind], expect: Expect) {
413 let mut actual = get_all_items(TEST_CONFIG, ra_fixture, None);
414 actual.retain(|it| kinds.contains(&it.kind()));
415 actual.sort_by_key(|it| cmp::Reverse(it.relevance().score()));
416 check_relevance_(actual, expect);
420 fn check_relevance(ra_fixture: &str, expect: Expect) {
421 let mut actual = get_all_items(TEST_CONFIG, ra_fixture, None);
422 actual.retain(|it| it.kind() != CompletionItemKind::Snippet);
423 actual.retain(|it| it.kind() != CompletionItemKind::Keyword);
424 actual.retain(|it| it.kind() != CompletionItemKind::BuiltinType);
425 actual.sort_by_key(|it| cmp::Reverse(it.relevance().score()));
426 check_relevance_(actual, expect);
430 fn check_relevance_(actual: Vec<CompletionItem>, expect: Expect) {
434 let mut items = vec![];
436 let tag = it.kind().tag();
437 let relevance = display_relevance(it.relevance());
438 items.push(format!("{} {} {}\n", tag, it.label(), relevance));
440 if let Some((mutability, relevance)) = it.ref_match() {
441 let label = format!("&{}{}", mutability.as_keyword_for_ref(), it.label());
442 let relevance = display_relevance(relevance);
444 items.push(format!("{} {} {}\n", tag, label, relevance));
449 .collect::<String>();
451 expect.assert_eq(&actual);
453 fn display_relevance(relevance: CompletionRelevance) -> String {
454 let relevance_factors = vec![
455 (relevance.type_match == Some(CompletionRelevanceTypeMatch::Exact), "type"),
457 relevance.type_match == Some(CompletionRelevanceTypeMatch::CouldUnify),
460 (relevance.exact_name_match, "name"),
461 (relevance.is_local, "local"),
463 relevance.postfix_match == Some(CompletionRelevancePostfixMatch::Exact),
466 (relevance.is_op_method, "op_method"),
467 (relevance.requires_import, "requires_import"),
470 .filter_map(|(cond, desc)| if cond { Some(desc) } else { None })
473 format!("[{}]", relevance_factors)
478 fn enum_detail_includes_record_fields() {
481 enum Foo { Foo { x: i32, y: i32 } }
483 fn main() { Foo::Fo$0 }
490 source_range: 54..56,
492 insert: "Foo { x: ${1:()}, y: ${2:()} }$0",
496 detail: "Foo { x: i32, y: i32 }",
504 fn enum_detail_includes_tuple_fields() {
507 enum Foo { Foo (i32, i32) }
509 fn main() { Foo::Fo$0 }
516 source_range: 46..48,
518 insert: "Foo(${1:()}, ${2:()})$0",
522 detail: "Foo(i32, i32)",
530 fn fn_detail_includes_args_and_return_type() {
533 fn foo<T>(a: u32, b: u32, t: T) -> (u32, T) { (a, t) }
537 SymbolKind::Function,
542 source_range: 68..70,
544 insert: "foo(${1:a}, ${2:b}, ${3:t})$0",
549 detail: "fn(u32, u32, T) -> (u32, T)",
550 trigger_call_info: true,
554 source_range: 68..70,
569 fn enum_detail_just_name_for_unit() {
574 fn main() { Foo::Fo$0 }
581 source_range: 35..37,
595 fn lookup_enums_by_two_qualifiers() {
599 pub enum Spam { Foo, Bar(i32) }
601 fn main() { let _: m::Spam = S$0 }
604 CompletionItemKind::SymbolKind(SymbolKind::Function),
605 CompletionItemKind::SymbolKind(SymbolKind::Module),
606 CompletionItemKind::SymbolKind(SymbolKind::Variant),
612 source_range: 75..76,
623 source_range: 75..76,
631 label: "m::Spam::Bar(…)",
632 source_range: 75..76,
634 insert: "m::Spam::Bar(${1:()})$0",
638 lookup: "Spam::Bar(…)",
639 detail: "m::Spam::Bar(i32)",
640 relevance: CompletionRelevance {
641 exact_name_match: false,
646 is_item_from_trait: false,
647 is_name_already_imported: false,
648 requires_import: false,
650 is_private_editable: false,
656 label: "m::Spam::Foo",
657 source_range: 75..76,
659 insert: "m::Spam::Foo$0",
664 detail: "m::Spam::Foo",
665 relevance: CompletionRelevance {
666 exact_name_match: false,
671 is_item_from_trait: false,
672 is_name_already_imported: false,
673 requires_import: false,
675 is_private_editable: false,
686 fn sets_deprecated_flag_in_items() {
690 fn something_deprecated() {}
694 SymbolKind::Function,
699 source_range: 56..59,
709 label: "something_deprecated()",
710 source_range: 56..59,
712 insert: "something_deprecated()$0",
716 lookup: "something_deprecated",
726 struct A { #[deprecated] the_field: u32 }
727 fn foo() { A { the$0 } }
734 source_range: 57..60,
742 relevance: CompletionRelevance {
743 exact_name_match: false,
748 is_item_from_trait: false,
749 is_name_already_imported: false,
750 requires_import: false,
752 is_private_editable: false,
772 fn bar(self) { self.$0 }
774 &[CompletionItemKind::Method, CompletionItemKind::SymbolKind(SymbolKind::Field)],
779 source_range: 94..94,
785 documentation: Documentation(
791 source_range: 94..94,
798 documentation: Documentation(
821 CompletionItemKind::SymbolKind(SymbolKind::Module),
822 CompletionItemKind::SymbolKind(SymbolKind::Variant),
823 CompletionItemKind::SymbolKind(SymbolKind::Enum),
829 source_range: 10..12,
835 documentation: Documentation(
841 source_range: 10..12,
848 documentation: Documentation(
854 source_range: 10..12,
860 documentation: Documentation(
870 fn dont_render_attrs() {
876 fn the_method(&self) { }
878 fn foo(s: S) { s.$0 }
880 CompletionItemKind::Method,
884 label: "the_method()",
885 source_range: 81..81,
887 insert: "the_method()$0",
889 lookup: "the_method",
898 fn no_call_parens_if_fn_ptr_needed() {
899 cov_mark::check!(no_call_parens_if_fn_ptr_needed);
903 fn foo(foo: u8, bar: u8) {}
904 struct ManualVtable { f: fn(u8, u8) }
906 fn main() -> ManualVtable {
907 ManualVtable { f: f$0 }
911 fn foo(foo: u8, bar: u8) {}
912 struct ManualVtable { f: fn(u8, u8) }
914 fn main() -> ManualVtable {
915 ManualVtable { f: foo }
922 struct RawIdentTable { r#type: u32 }
924 fn main() -> RawIdentTable {
925 RawIdentTable { t$0: 42 }
929 struct RawIdentTable { r#type: u32 }
931 fn main() -> RawIdentTable {
932 RawIdentTable { r#type: 42 }
939 fn no_parens_in_use_item() {
940 cov_mark::check!(no_parens_in_use_item);
944 mod m { pub fn foo() {} }
948 mod m { pub fn foo() {} }
955 fn no_parens_in_call() {
971 impl Foo { fn foo(&self){} }
972 fn f(foo: &Foo) { foo.f$0(); }
976 impl Foo { fn foo(&self){} }
977 fn f(foo: &Foo) { foo.foo(); }
983 fn inserts_angle_brackets_for_generics() {
984 cov_mark::check!(inserts_angle_brackets_for_generics);
1010 struct Vec<T = i128> {}
1014 struct Vec<T = i128> {}
1022 fn foo(xs: Ve$0<i128>)
1026 fn foo(xs: Vec<i128>)
1032 fn active_param_relevance() {
1035 struct S { foo: i64, bar: u32, baz: u32 }
1036 fn test(bar: u32) { }
1037 fn foo(s: S) { test(s.$0) }
1048 fn record_field_relevances() {
1051 struct A { foo: i64, bar: u32, baz: u32 }
1052 struct B { x: (), y: f32, bar: u32 }
1053 fn foo(a: A) { B { bar: a.$0 }; }
1064 fn record_field_and_call_relevances() {
1067 struct A { foo: i64, bar: u32, baz: u32 }
1068 struct B { x: (), y: f32, bar: u32 }
1070 fn foo(a: A) { B { bar: f(a.$0) }; }
1080 struct A { foo: i64, bar: u32, baz: u32 }
1081 struct B { x: (), y: f32, bar: u32 }
1083 fn foo(a: A) { f(B { bar: a.$0 }); }
1094 fn prioritize_exact_ref_match() {
1097 struct WorldSnapshot { _f: () };
1098 fn go(world: &WorldSnapshot) { go(w$0) }
1101 lc world [type+name+local]
1102 st WorldSnapshot {…} []
1103 st &WorldSnapshot {…} [type]
1111 fn too_many_arguments() {
1112 cov_mark::check!(too_many_arguments);
1116 fn f(foo: &Foo) { f(foo, w$0) }
1127 fn score_fn_type_and_name_match() {
1130 struct A { bar: u8 }
1131 fn baz() -> u8 { 0 }
1132 fn bar() -> u8 { 0 }
1133 fn f() { A { bar: b$0 }; }
1136 fn bar() [type+name]
1145 fn score_method_type_and_name_match() {
1151 fn aaa(&self) -> u32 { 0 }
1152 fn bbb(&self) -> u32 { 0 }
1153 fn ccc(&self) -> u64 { 0 }
1160 me aaa() [type+name]
1168 fn score_method_name_match_only() {
1174 fn aaa(&self) -> u64 { 0 }
1187 fn suggest_ref_mut() {
1188 cov_mark::check!(suggest_ref);
1192 fn foo(s: &mut S) {}
1200 lc &mut s [type+name+local]
1211 fn foo(s: &mut S) {}
1218 lc s [type+name+local]
1228 fn foo(s: &mut S) {}
1235 lc ssss [type+local]
1245 fn suggest_deref() {
1252 impl core::ops::Deref for T {
1255 fn deref(&self) -> &Self::Target {
1286 fn suggest_deref_mut() {
1289 //- minicore: deref_mut
1293 impl core::ops::Deref for T {
1296 fn deref(&self) -> &Self::Target {
1301 impl core::ops::DerefMut for T {
1302 fn deref_mut(&mut self) -> &mut Self::Target {
1307 fn foo(s: &mut S) {}
1319 lc &mut t [type+local]
1393 fn suggest_deref_fn_ret() {
1400 impl core::ops::Deref for T {
1403 fn deref(&self) -> &Self::Target {
1431 fn op_function_relevances() {
1436 fn sub(self, other: Self) -> Self { self }
1439 fn foo(a: u32) { a.$0 }
1442 me sub(…) (as Sub) [op_method]
1452 pub trait PartialEq<Rhs: ?Sized = Self> {
1453 fn eq(&self, other: &Rhs) -> bool;
1454 fn ne(&self, other: &Rhs) -> bool;
1457 impl PartialEq for Foo {}
1464 me eq(…) (as PartialEq) [op_method]
1465 me ne(…) (as PartialEq) [op_method]
1471 fn struct_field_method_ref() {
1474 struct Foo { bar: u32 }
1475 impl Foo { fn baz(&self) -> u32 { 0 } }
1477 fn foo(f: Foo) { let _: &u32 = f.b$0 }
1479 &[CompletionItemKind::Method, CompletionItemKind::SymbolKind(SymbolKind::Field)],
1481 // Ideally we'd also suggest &f.bar and &f.baz() as exact
1482 // type matches. See #8058.
1487 source_range: 98..99,
1492 detail: "fn(&self) -> u32",
1496 source_range: 98..99,
1510 fn qualified_path_ref() {
1511 // disabled right now because it doesn't render correctly, #8058
1527 &[CompletionItemKind::SymbolKind(SymbolKind::Function)],
1532 source_range: 95..95,
1539 detail: "fn() -> S",
1550 enum Foo<T> { A(T), B }
1551 // bar() should not be an exact type match
1552 // because the generic parameters are different
1553 fn bar() -> Foo<u8> { Foo::B }
1554 // FIXME baz() should be an exact type match
1555 // because the types could unify, but it currently
1556 // is not. This is due to the T here being
1557 // TyKind::Placeholder rather than TyKind::Missing.
1558 fn baz<T>() -> Foo<T> { Foo::B }
1560 let foo: Foo<u32> = Foo::B;
1561 let _: Foo<u32> = f$0;
1566 ev Foo::A(…) [type_could_unify]
1567 ev Foo::B [type_could_unify]
1577 fn postfix_exact_match_is_high_priority() {
1578 cov_mark::check!(postfix_exact_match_is_high_priority);
1579 check_relevance_for_kinds(
1584 fn not(self) -> Self::Output;
1589 fn not(self) -> bool { if self { false } else { true }}
1594 let _: bool = (9 > 2).not$0;
1597 &[CompletionItemKind::Snippet, CompletionItemKind::Method],
1600 me not() (use ops::Not) [type_could_unify+requires_import]
1615 fn postfix_inexact_match_is_low_priority() {
1616 cov_mark::check!(postfix_inexact_match_is_low_priority);
1617 check_relevance_for_kinds(
1627 &[CompletionItemKind::Snippet, CompletionItemKind::Method],
1644 fn flyimport_reduced_relevance() {
1649 pub trait BufRead {}
1650 pub struct BufReader;
1651 pub struct BufWriter;
1664 tt BufRead (use std::io::BufRead) [requires_import]
1665 st BufReader (use std::io::BufReader) [requires_import]
1666 st BufWriter (use std::io::BufWriter) [requires_import]