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()).to_smol_str();
120 let mut item = CompletionItem::new(
123 receiver.map_or_else(|| name.clone(), |receiver| format!("{}.{}", receiver, name).into()),
125 item.set_relevance(CompletionRelevance {
126 type_match: compute_type_match(ctx.completion, ty),
127 exact_name_match: compute_exact_name_match(ctx.completion, name.as_str()),
128 ..CompletionRelevance::default()
130 item.detail(ty.display(ctx.db()).to_string())
131 .set_documentation(field.docs(ctx.db()))
132 .set_deprecated(is_deprecated)
133 .lookup_by(name.clone());
134 let is_keyword = SyntaxKind::from_keyword(name.as_str()).is_some();
135 if is_keyword && !matches!(name.as_str(), "self" | "crate" | "super" | "Self") {
136 item.insert_text(format!("r#{}", name));
138 if let Some(receiver) = &dot_access.receiver {
139 if let Some(ref_match) = compute_ref_match(ctx.completion, ty) {
140 item.ref_match(ref_match, receiver.syntax().text_range().start());
146 pub(crate) fn render_tuple_field(
147 ctx: RenderContext<'_>,
148 receiver: Option<hir::Name>,
151 ) -> CompletionItem {
152 let mut item = CompletionItem::new(
155 receiver.map_or_else(|| field.to_string(), |receiver| format!("{}.{}", receiver, field)),
157 item.detail(ty.display(ctx.db()).to_string()).lookup_by(field.to_string());
161 pub(crate) fn render_type_inference(ty_string: String, ctx: &CompletionContext) -> CompletionItem {
163 CompletionItem::new(CompletionItemKind::InferredType, ctx.source_range(), ty_string);
164 builder.set_relevance(CompletionRelevance { is_definite: true, ..Default::default() });
168 pub(crate) fn render_path_resolution(
169 ctx: RenderContext<'_>,
170 path_ctx: &PathCompletionCtx,
171 local_name: hir::Name,
172 resolution: ScopeDef,
174 render_resolution_path(ctx, path_ctx, local_name, None, resolution)
177 pub(crate) fn render_pattern_resolution(
178 ctx: RenderContext<'_>,
179 pattern_ctx: &PatternContext,
180 local_name: hir::Name,
181 resolution: ScopeDef,
183 render_resolution_pat(ctx, pattern_ctx, local_name, None, resolution)
186 pub(crate) fn render_resolution_with_import(
187 ctx: RenderContext<'_>,
188 path_ctx: &PathCompletionCtx,
189 import_edit: LocatedImport,
190 ) -> Option<Builder> {
191 let resolution = ScopeDef::from(import_edit.original_item);
192 let local_name = scope_def_to_name(resolution, &ctx, &import_edit)?;
194 Some(render_resolution_path(ctx, path_ctx, local_name, Some(import_edit), resolution))
197 pub(crate) fn render_resolution_with_import_pat(
198 ctx: RenderContext<'_>,
199 pattern_ctx: &PatternContext,
200 import_edit: LocatedImport,
201 ) -> Option<Builder> {
202 let resolution = ScopeDef::from(import_edit.original_item);
203 let local_name = scope_def_to_name(resolution, &ctx, &import_edit)?;
204 Some(render_resolution_pat(ctx, pattern_ctx, local_name, Some(import_edit), resolution))
207 fn scope_def_to_name(
208 resolution: ScopeDef,
210 import_edit: &LocatedImport,
211 ) -> Option<hir::Name> {
212 Some(match resolution {
213 ScopeDef::ModuleDef(hir::ModuleDef::Function(f)) => f.name(ctx.completion.db),
214 ScopeDef::ModuleDef(hir::ModuleDef::Const(c)) => c.name(ctx.completion.db)?,
215 ScopeDef::ModuleDef(hir::ModuleDef::TypeAlias(t)) => t.name(ctx.completion.db),
216 _ => item_name(ctx.db(), import_edit.original_item)?,
220 fn render_resolution_pat(
221 ctx: RenderContext<'_>,
222 pattern_ctx: &PatternContext,
223 local_name: hir::Name,
224 import_to_add: Option<LocatedImport>,
225 resolution: ScopeDef,
227 let _p = profile::span("render_resolution");
228 use hir::ModuleDef::*;
231 ScopeDef::ModuleDef(Macro(mac)) => {
232 let ctx = ctx.import_to_add(import_to_add);
233 return render_macro_pat(ctx, pattern_ctx, local_name, mac);
238 render_resolution_simple_(ctx, local_name, import_to_add, resolution)
241 fn render_resolution_path(
242 ctx: RenderContext<'_>,
243 path_ctx: &PathCompletionCtx,
244 local_name: hir::Name,
245 import_to_add: Option<LocatedImport>,
246 resolution: ScopeDef,
248 let _p = profile::span("render_resolution");
249 use hir::ModuleDef::*;
252 ScopeDef::ModuleDef(Macro(mac)) => {
253 let ctx = ctx.import_to_add(import_to_add);
254 return render_macro(ctx, path_ctx, local_name, mac);
256 ScopeDef::ModuleDef(Function(func)) => {
257 let ctx = ctx.import_to_add(import_to_add);
258 return render_fn(ctx, path_ctx, Some(local_name), func);
260 ScopeDef::ModuleDef(Variant(var)) => {
261 let ctx = ctx.clone().import_to_add(import_to_add.clone());
263 render_variant_lit(ctx, path_ctx, Some(local_name.clone()), var, None)
271 let completion = ctx.completion;
272 let cap = ctx.snippet_cap();
273 let db = completion.db;
274 let config = completion.config;
276 let name = local_name.to_smol_str();
277 let mut item = render_resolution_simple_(ctx, local_name, import_to_add, resolution);
278 // Add `<>` for generic types
279 let type_path_no_ty_args = matches!(
281 PathCompletionCtx { kind: PathKind::Type { .. }, has_type_args: false, .. }
282 ) && config.callable.is_some();
283 if type_path_no_ty_args {
284 if let Some(cap) = cap {
285 let has_non_default_type_params = match resolution {
286 ScopeDef::ModuleDef(hir::ModuleDef::Adt(it)) => it.has_non_default_type_params(db),
287 ScopeDef::ModuleDef(hir::ModuleDef::TypeAlias(it)) => {
288 it.has_non_default_type_params(db)
293 if has_non_default_type_params {
294 cov_mark::hit!(inserts_angle_brackets_for_generics);
295 item.lookup_by(name.clone())
296 .label(SmolStr::from_iter([&name, "<…>"]))
298 .insert_snippet(cap, format!("{}<$0>", name));
302 if let ScopeDef::Local(local) = resolution {
303 let ty = local.ty(db);
304 if !ty.is_unknown() {
305 item.detail(ty.display(db).to_string());
308 item.set_relevance(CompletionRelevance {
309 type_match: compute_type_match(completion, &ty),
310 exact_name_match: compute_exact_name_match(completion, &name),
312 ..CompletionRelevance::default()
315 if let Some(ref_match) = compute_ref_match(completion, &ty) {
316 item.ref_match(ref_match, path_ctx.path.syntax().text_range().start());
322 fn render_resolution_simple_(
323 ctx: RenderContext<'_>,
324 local_name: hir::Name,
325 import_to_add: Option<LocatedImport>,
326 resolution: ScopeDef,
328 let _p = profile::span("render_resolution");
331 let ctx = ctx.import_to_add(import_to_add);
332 let kind = res_to_kind(resolution);
334 let mut item = CompletionItem::new(kind, ctx.source_range(), local_name.to_smol_str());
335 item.set_relevance(ctx.completion_relevance())
336 .set_documentation(scope_def_docs(db, resolution))
337 .set_deprecated(scope_def_is_deprecated(&ctx, resolution));
339 if let Some(import_to_add) = ctx.import_to_add {
340 item.add_import(import_to_add);
345 fn res_to_kind(resolution: ScopeDef) -> CompletionItemKind {
346 use hir::ModuleDef::*;
348 ScopeDef::Unknown => CompletionItemKind::UnresolvedReference,
349 ScopeDef::ModuleDef(Function(_)) => CompletionItemKind::SymbolKind(SymbolKind::Function),
350 ScopeDef::ModuleDef(Variant(_)) => CompletionItemKind::SymbolKind(SymbolKind::Variant),
351 ScopeDef::ModuleDef(Macro(_)) => CompletionItemKind::SymbolKind(SymbolKind::Macro),
352 ScopeDef::ModuleDef(Module(..)) => CompletionItemKind::SymbolKind(SymbolKind::Module),
353 ScopeDef::ModuleDef(Adt(adt)) => CompletionItemKind::SymbolKind(match adt {
354 hir::Adt::Struct(_) => SymbolKind::Struct,
355 hir::Adt::Union(_) => SymbolKind::Union,
356 hir::Adt::Enum(_) => SymbolKind::Enum,
358 ScopeDef::ModuleDef(Const(..)) => CompletionItemKind::SymbolKind(SymbolKind::Const),
359 ScopeDef::ModuleDef(Static(..)) => CompletionItemKind::SymbolKind(SymbolKind::Static),
360 ScopeDef::ModuleDef(Trait(..)) => CompletionItemKind::SymbolKind(SymbolKind::Trait),
361 ScopeDef::ModuleDef(TypeAlias(..)) => CompletionItemKind::SymbolKind(SymbolKind::TypeAlias),
362 ScopeDef::ModuleDef(BuiltinType(..)) => CompletionItemKind::BuiltinType,
363 ScopeDef::GenericParam(param) => CompletionItemKind::SymbolKind(match param {
364 hir::GenericParam::TypeParam(_) => SymbolKind::TypeParam,
365 hir::GenericParam::ConstParam(_) => SymbolKind::ConstParam,
366 hir::GenericParam::LifetimeParam(_) => SymbolKind::LifetimeParam,
368 ScopeDef::Local(..) => CompletionItemKind::SymbolKind(SymbolKind::Local),
369 ScopeDef::Label(..) => CompletionItemKind::SymbolKind(SymbolKind::Label),
370 ScopeDef::AdtSelfType(..) | ScopeDef::ImplSelfType(..) => {
371 CompletionItemKind::SymbolKind(SymbolKind::SelfParam)
376 fn scope_def_docs(db: &RootDatabase, resolution: ScopeDef) -> Option<hir::Documentation> {
377 use hir::ModuleDef::*;
379 ScopeDef::ModuleDef(Module(it)) => it.docs(db),
380 ScopeDef::ModuleDef(Adt(it)) => it.docs(db),
381 ScopeDef::ModuleDef(Variant(it)) => it.docs(db),
382 ScopeDef::ModuleDef(Const(it)) => it.docs(db),
383 ScopeDef::ModuleDef(Static(it)) => it.docs(db),
384 ScopeDef::ModuleDef(Trait(it)) => it.docs(db),
385 ScopeDef::ModuleDef(TypeAlias(it)) => it.docs(db),
390 fn scope_def_is_deprecated(ctx: &RenderContext<'_>, resolution: ScopeDef) -> bool {
392 ScopeDef::ModuleDef(it) => ctx.is_deprecated_assoc_item(it),
393 ScopeDef::GenericParam(it) => ctx.is_deprecated(it),
394 ScopeDef::AdtSelfType(it) => ctx.is_deprecated(it),
399 fn compute_type_match(
400 ctx: &CompletionContext,
401 completion_ty: &hir::Type,
402 ) -> Option<CompletionRelevanceTypeMatch> {
403 let expected_type = ctx.expected_type.as_ref()?;
405 // We don't ever consider unit type to be an exact type match, since
406 // nearly always this is not meaningful to the user.
407 if expected_type.is_unit() {
411 if completion_ty == expected_type {
412 Some(CompletionRelevanceTypeMatch::Exact)
413 } else if expected_type.could_unify_with(ctx.db, completion_ty) {
414 Some(CompletionRelevanceTypeMatch::CouldUnify)
420 fn compute_exact_name_match(ctx: &CompletionContext, completion_name: &str) -> bool {
421 ctx.expected_name.as_ref().map_or(false, |name| name.text() == completion_name)
424 fn compute_ref_match(
425 ctx: &CompletionContext,
426 completion_ty: &hir::Type,
427 ) -> Option<hir::Mutability> {
428 let expected_type = ctx.expected_type.as_ref()?;
429 if completion_ty != expected_type {
430 let expected_type_without_ref = expected_type.remove_ref()?;
431 if completion_ty.autoderef(ctx.db).any(|deref_ty| deref_ty == expected_type_without_ref) {
432 cov_mark::hit!(suggest_ref);
433 let mutability = if expected_type.is_mutable_reference() {
436 hir::Mutability::Shared
438 return Some(mutability);
448 use expect_test::{expect, Expect};
449 use ide_db::SymbolKind;
450 use itertools::Itertools;
453 item::CompletionRelevanceTypeMatch,
454 tests::{check_edit, do_completion, get_all_items, TEST_CONFIG},
455 CompletionItem, CompletionItemKind, CompletionRelevance, CompletionRelevancePostfixMatch,
459 fn check(ra_fixture: &str, kind: impl Into<CompletionItemKind>, expect: Expect) {
460 let actual = do_completion(ra_fixture, kind.into());
461 expect.assert_debug_eq(&actual);
465 fn check_kinds(ra_fixture: &str, kinds: &[CompletionItemKind], expect: Expect) {
467 kinds.iter().flat_map(|&kind| do_completion(ra_fixture, kind)).collect();
468 expect.assert_debug_eq(&actual);
472 fn check_relevance_for_kinds(ra_fixture: &str, kinds: &[CompletionItemKind], expect: Expect) {
473 let mut actual = get_all_items(TEST_CONFIG, ra_fixture, None);
474 actual.retain(|it| kinds.contains(&it.kind()));
475 actual.sort_by_key(|it| cmp::Reverse(it.relevance().score()));
476 check_relevance_(actual, expect);
480 fn check_relevance(ra_fixture: &str, expect: Expect) {
481 let mut actual = get_all_items(TEST_CONFIG, ra_fixture, None);
482 actual.retain(|it| it.kind() != CompletionItemKind::Snippet);
483 actual.retain(|it| it.kind() != CompletionItemKind::Keyword);
484 actual.retain(|it| it.kind() != CompletionItemKind::BuiltinType);
485 actual.sort_by_key(|it| cmp::Reverse(it.relevance().score()));
486 check_relevance_(actual, expect);
490 fn check_relevance_(actual: Vec<CompletionItem>, expect: Expect) {
494 let mut items = vec![];
496 let tag = it.kind().tag();
497 let relevance = display_relevance(it.relevance());
498 items.push(format!("{} {} {}\n", tag, it.label(), relevance));
500 if let Some((mutability, _offset, relevance)) = it.ref_match() {
501 let label = format!("&{}{}", mutability.as_keyword_for_ref(), it.label());
502 let relevance = display_relevance(relevance);
504 items.push(format!("{} {} {}\n", tag, label, relevance));
509 .collect::<String>();
511 expect.assert_eq(&actual);
513 fn display_relevance(relevance: CompletionRelevance) -> String {
514 let relevance_factors = vec![
515 (relevance.type_match == Some(CompletionRelevanceTypeMatch::Exact), "type"),
517 relevance.type_match == Some(CompletionRelevanceTypeMatch::CouldUnify),
520 (relevance.exact_name_match, "name"),
521 (relevance.is_local, "local"),
523 relevance.postfix_match == Some(CompletionRelevancePostfixMatch::Exact),
526 (relevance.is_op_method, "op_method"),
527 (relevance.requires_import, "requires_import"),
530 .filter_map(|(cond, desc)| if cond { Some(desc) } else { None })
533 format!("[{}]", relevance_factors)
538 fn enum_detail_includes_record_fields() {
541 enum Foo { Foo { x: i32, y: i32 } }
543 fn main() { Foo::Fo$0 }
550 source_range: 54..56,
552 insert: "Foo { x: ${1:()}, y: ${2:()} }$0",
556 detail: "Foo { x: i32, y: i32 }",
564 fn enum_detail_includes_tuple_fields() {
567 enum Foo { Foo (i32, i32) }
569 fn main() { Foo::Fo$0 }
576 source_range: 46..48,
578 insert: "Foo(${1:()}, ${2:()})$0",
582 detail: "Foo(i32, i32)",
590 fn fn_detail_includes_args_and_return_type() {
593 fn foo<T>(a: u32, b: u32, t: T) -> (u32, T) { (a, t) }
597 SymbolKind::Function,
602 source_range: 68..70,
604 insert: "foo(${1:a}, ${2:b}, ${3:t})$0",
609 detail: "fn(u32, u32, T) -> (u32, T)",
610 trigger_call_info: true,
614 source_range: 68..70,
629 fn enum_detail_just_name_for_unit() {
634 fn main() { Foo::Fo$0 }
641 source_range: 35..37,
655 fn lookup_enums_by_two_qualifiers() {
659 pub enum Spam { Foo, Bar(i32) }
661 fn main() { let _: m::Spam = S$0 }
664 CompletionItemKind::SymbolKind(SymbolKind::Function),
665 CompletionItemKind::SymbolKind(SymbolKind::Module),
666 CompletionItemKind::SymbolKind(SymbolKind::Variant),
672 source_range: 75..76,
683 source_range: 75..76,
691 label: "m::Spam::Bar(…)",
692 source_range: 75..76,
694 insert: "m::Spam::Bar(${1:()})$0",
698 lookup: "Spam::Bar(…)",
699 detail: "m::Spam::Bar(i32)",
700 relevance: CompletionRelevance {
701 exact_name_match: false,
706 is_item_from_trait: false,
707 is_name_already_imported: false,
708 requires_import: false,
710 is_private_editable: false,
716 label: "m::Spam::Foo",
717 source_range: 75..76,
719 insert: "m::Spam::Foo$0",
724 detail: "m::Spam::Foo",
725 relevance: CompletionRelevance {
726 exact_name_match: false,
731 is_item_from_trait: false,
732 is_name_already_imported: false,
733 requires_import: false,
735 is_private_editable: false,
746 fn sets_deprecated_flag_in_items() {
750 fn something_deprecated() {}
754 SymbolKind::Function,
759 source_range: 56..59,
769 label: "something_deprecated()",
770 source_range: 56..59,
772 insert: "something_deprecated()$0",
776 lookup: "something_deprecated",
786 struct A { #[deprecated] the_field: u32 }
787 fn foo() { A { the$0 } }
794 source_range: 57..60,
802 relevance: CompletionRelevance {
803 exact_name_match: false,
808 is_item_from_trait: false,
809 is_name_already_imported: false,
810 requires_import: false,
812 is_private_editable: false,
832 fn bar(self) { self.$0 }
834 &[CompletionItemKind::Method, CompletionItemKind::SymbolKind(SymbolKind::Field)],
839 source_range: 94..94,
845 documentation: Documentation(
851 source_range: 94..94,
858 documentation: Documentation(
881 CompletionItemKind::SymbolKind(SymbolKind::Module),
882 CompletionItemKind::SymbolKind(SymbolKind::Variant),
883 CompletionItemKind::SymbolKind(SymbolKind::Enum),
889 source_range: 10..12,
895 documentation: Documentation(
901 source_range: 10..12,
908 documentation: Documentation(
914 source_range: 10..12,
920 documentation: Documentation(
930 fn dont_render_attrs() {
936 fn the_method(&self) { }
938 fn foo(s: S) { s.$0 }
940 CompletionItemKind::Method,
944 label: "the_method()",
945 source_range: 81..81,
947 insert: "the_method()$0",
949 lookup: "the_method",
958 fn no_call_parens_if_fn_ptr_needed() {
959 cov_mark::check!(no_call_parens_if_fn_ptr_needed);
963 fn foo(foo: u8, bar: u8) {}
964 struct ManualVtable { f: fn(u8, u8) }
966 fn main() -> ManualVtable {
967 ManualVtable { f: f$0 }
971 fn foo(foo: u8, bar: u8) {}
972 struct ManualVtable { f: fn(u8, u8) }
974 fn main() -> ManualVtable {
975 ManualVtable { f: foo }
982 struct RawIdentTable { r#type: u32 }
984 fn main() -> RawIdentTable {
985 RawIdentTable { t$0: 42 }
989 struct RawIdentTable { r#type: u32 }
991 fn main() -> RawIdentTable {
992 RawIdentTable { r#type: 42 }
999 fn no_parens_in_use_item() {
1003 mod m { pub fn foo() {} }
1007 mod m { pub fn foo() {} }
1014 fn no_parens_in_call() {
1019 fn main() { f$0(); }
1023 fn main() { foo(); }
1030 impl Foo { fn foo(&self){} }
1031 fn f(foo: &Foo) { foo.f$0(); }
1035 impl Foo { fn foo(&self){} }
1036 fn f(foo: &Foo) { foo.foo(); }
1042 fn inserts_angle_brackets_for_generics() {
1043 cov_mark::check!(inserts_angle_brackets_for_generics);
1069 struct Vec<T = i128> {}
1073 struct Vec<T = i128> {}
1081 fn foo(xs: Ve$0<i128>)
1085 fn foo(xs: Vec<i128>)
1091 fn active_param_relevance() {
1094 struct S { foo: i64, bar: u32, baz: u32 }
1095 fn test(bar: u32) { }
1096 fn foo(s: S) { test(s.$0) }
1107 fn record_field_relevances() {
1110 struct A { foo: i64, bar: u32, baz: u32 }
1111 struct B { x: (), y: f32, bar: u32 }
1112 fn foo(a: A) { B { bar: a.$0 }; }
1123 fn record_field_and_call_relevances() {
1126 struct A { foo: i64, bar: u32, baz: u32 }
1127 struct B { x: (), y: f32, bar: u32 }
1129 fn foo(a: A) { B { bar: f(a.$0) }; }
1139 struct A { foo: i64, bar: u32, baz: u32 }
1140 struct B { x: (), y: f32, bar: u32 }
1142 fn foo(a: A) { f(B { bar: a.$0 }); }
1153 fn prioritize_exact_ref_match() {
1156 struct WorldSnapshot { _f: () };
1157 fn go(world: &WorldSnapshot) { go(w$0) }
1160 lc world [type+name+local]
1161 st WorldSnapshot {…} []
1162 st &WorldSnapshot {…} [type]
1170 fn too_many_arguments() {
1171 cov_mark::check!(too_many_arguments);
1175 fn f(foo: &Foo) { f(foo, w$0) }
1186 fn score_fn_type_and_name_match() {
1189 struct A { bar: u8 }
1190 fn baz() -> u8 { 0 }
1191 fn bar() -> u8 { 0 }
1192 fn f() { A { bar: b$0 }; }
1195 fn bar() [type+name]
1204 fn score_method_type_and_name_match() {
1210 fn aaa(&self) -> u32 { 0 }
1211 fn bbb(&self) -> u32 { 0 }
1212 fn ccc(&self) -> u64 { 0 }
1219 me aaa() [type+name]
1227 fn score_method_name_match_only() {
1233 fn aaa(&self) -> u64 { 0 }
1246 fn suggest_ref_mut() {
1247 cov_mark::check!(suggest_ref);
1251 fn foo(s: &mut S) {}
1259 lc &mut s [type+name+local]
1270 fn foo(s: &mut S) {}
1277 lc s [type+name+local]
1287 fn foo(s: &mut S) {}
1294 lc ssss [type+local]
1304 fn suggest_deref() {
1311 impl core::ops::Deref for T {
1314 fn deref(&self) -> &Self::Target {
1345 fn suggest_deref_mut() {
1348 //- minicore: deref_mut
1352 impl core::ops::Deref for T {
1355 fn deref(&self) -> &Self::Target {
1360 impl core::ops::DerefMut for T {
1361 fn deref_mut(&mut self) -> &mut Self::Target {
1366 fn foo(s: &mut S) {}
1378 lc &mut t [type+local]
1452 fn suggest_deref_fn_ret() {
1459 impl core::ops::Deref for T {
1462 fn deref(&self) -> &Self::Target {
1490 fn op_function_relevances() {
1495 fn sub(self, other: Self) -> Self { self }
1498 fn foo(a: u32) { a.$0 }
1501 me sub(…) (as Sub) [op_method]
1511 pub trait PartialEq<Rhs: ?Sized = Self> {
1512 fn eq(&self, other: &Rhs) -> bool;
1513 fn ne(&self, other: &Rhs) -> bool;
1516 impl PartialEq for Foo {}
1523 me eq(…) (as PartialEq) [op_method]
1524 me ne(…) (as PartialEq) [op_method]
1530 fn struct_field_method_ref() {
1533 struct Foo { bar: u32 }
1534 impl Foo { fn baz(&self) -> u32 { 0 } }
1536 fn foo(f: Foo) { let _: &u32 = f.b$0 }
1538 &[CompletionItemKind::Method, CompletionItemKind::SymbolKind(SymbolKind::Field)],
1543 source_range: 98..99,
1548 detail: "fn(&self) -> u32",
1553 source_range: 98..99,
1568 fn qualified_path_ref() {
1584 &[CompletionItemKind::SymbolKind(SymbolKind::Function)],
1589 source_range: 95..95,
1596 detail: "fn() -> S",
1608 enum Foo<T> { A(T), B }
1609 // bar() should not be an exact type match
1610 // because the generic parameters are different
1611 fn bar() -> Foo<u8> { Foo::B }
1612 // FIXME baz() should be an exact type match
1613 // because the types could unify, but it currently
1614 // is not. This is due to the T here being
1615 // TyKind::Placeholder rather than TyKind::Missing.
1616 fn baz<T>() -> Foo<T> { Foo::B }
1618 let foo: Foo<u32> = Foo::B;
1619 let _: Foo<u32> = f$0;
1624 ev Foo::A(…) [type_could_unify]
1625 ev Foo::B [type_could_unify]
1635 fn postfix_exact_match_is_high_priority() {
1636 cov_mark::check!(postfix_exact_match_is_high_priority);
1637 check_relevance_for_kinds(
1642 fn not(self) -> Self::Output;
1647 fn not(self) -> bool { if self { false } else { true }}
1652 let _: bool = (9 > 2).not$0;
1655 &[CompletionItemKind::Snippet, CompletionItemKind::Method],
1658 me not() (use ops::Not) [type_could_unify+requires_import]
1673 fn postfix_inexact_match_is_low_priority() {
1674 cov_mark::check!(postfix_inexact_match_is_low_priority);
1675 check_relevance_for_kinds(
1685 &[CompletionItemKind::Snippet, CompletionItemKind::Method],
1702 fn flyimport_reduced_relevance() {
1707 pub trait BufRead {}
1708 pub struct BufReader;
1709 pub struct BufWriter;
1722 tt BufRead (use std::io::BufRead) [requires_import]
1723 st BufReader (use std::io::BufReader) [requires_import]
1724 st BufWriter (use std::io::BufWriter) [requires_import]